remove macro

cargo fmt
remove closure
2026-07-02 04:24:57 +03:00 · 2019-09-08 16:57:56 +02:00 · 2019-09-07 13:26:06 +02:00 · 2019-09-07 13:23:54 +02:00 · 2019-09-07 12:34:56 +02:00
62 changed files with 6457 additions and 5683 deletions
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -110,19 +110,6 @@ dependencies = [
 "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

-[[package]]
-name = "bit-set"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bit-vec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bit-vec"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "bitfield"
 version = "0.13.2"
@@ -470,15 +457,6 @@ dependencies = [
 "syn 0.15.44 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

-[[package]]
-name = "debug_stub_derive"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "deltachat"
 version = "1.0.0-alpha.4"
@@ -490,7 +468,6 @@ dependencies = [
 "cc 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
 "charset 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "chrono 0.4.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "debug_stub_derive 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "deltachat_derive 0.1.0",
 "escaper 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -499,7 +476,6 @@ dependencies = [
 "image-meta 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "imap 1.0.2 (git+https://github.com/jonhoo/rust-imap?rev=281d2eb8ab50dc656ceff2ae749ca5045f334e15)",
 "itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "jetscii 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
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 "lettre 0.9.2 (registry+https://github.com/rust-lang/crates.io-index)",
 "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -513,7 +489,6 @@ dependencies = [
 "pkg-config 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
 "pretty_assertions 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
 "pretty_env_logger 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "proptest 0.9.4 (registry+https://github.com/rust-lang/crates.io-index)",
 "quick-xml 0.15.0 (registry+https://github.com/rust-lang/crates.io-index)",
 "r2d2 0.8.5 (registry+https://github.com/rust-lang/crates.io-index)",
 "r2d2_sqlite 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1021,11 +996,6 @@ name = "itoa"
 version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"

-[[package]]
-name = "jetscii"
-version = "0.4.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "keccak"
 version = "0.1.0"
@@ -1677,25 +1647,6 @@ dependencies = [
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 ]

-[[package]]
-name = "proptest"
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-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
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- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "lazy_static 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "regex-syntax 0.6.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "rusty-fork 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "publicsuffix"
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@@ -1733,11 +1684,6 @@ dependencies = [
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 ]

-[[package]]
-name = "quote"
-version = "0.3.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -2074,17 +2020,6 @@ dependencies = [
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 ]

-[[package]]
-name = "rusty-fork"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "fnv 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
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- "tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "wait-timeout 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
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-
 [[package]]
 name = "rustyline"
 version = "4.1.0"
@@ -2353,16 +2288,6 @@ name = "subtle"
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 source = "registry+https://github.com/rust-lang/crates.io-index"

-[[package]]
-name = "syn"
-version = "0.11.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "syn"
 version = "0.14.9"
@@ -2393,14 +2318,6 @@ dependencies = [
 "unicode-xid 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]

-[[package]]
-name = "synom"
-version = "0.11.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.0.4 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "synstructure"
 version = "0.10.2"
@@ -2674,11 +2591,6 @@ name = "unicode-width"
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 source = "registry+https://github.com/rust-lang/crates.io-index"

-[[package]]
-name = "unicode-xid"
-version = "0.0.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
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 version = "0.1.0"
@@ -2752,14 +2664,6 @@ name = "void"
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 source = "registry+https://github.com/rust-lang/crates.io-index"

-[[package]]
-name = "wait-timeout"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.62 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "walkdir"
 version = "2.2.9"
@@ -2907,8 +2811,6 @@ dependencies = [
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 "checksum backtrace-sys 0.1.31 (registry+https://github.com/rust-lang/crates.io-index)" = "82a830b4ef2d1124a711c71d263c5abdc710ef8e907bd508c88be475cebc422b"
 "checksum base64 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "0b25d992356d2eb0ed82172f5248873db5560c4721f564b13cb5193bda5e668e"
-"checksum bit-set 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e84c238982c4b1e1ee668d136c510c67a13465279c0cb367ea6baf6310620a80"
-"checksum bit-vec 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "f59bbe95d4e52a6398ec21238d31577f2b28a9d86807f06ca59d191d8440d0bb"
 "checksum bitfield 0.13.2 (registry+https://github.com/rust-lang/crates.io-index)" = "46afbd2983a5d5a7bd740ccb198caf5b82f45c40c09c0eed36052d91cb92e719"
 "checksum bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3d155346769a6855b86399e9bc3814ab343cd3d62c7e985113d46a0ec3c281fd"
 "checksum blake2b_simd 0.5.6 (registry+https://github.com/rust-lang/crates.io-index)" = "461f4b879a8eb70c1debf7d0788a9a5ff15f1ea9d25925fea264ef4258bed6b2"
@@ -2950,7 +2852,6 @@ dependencies = [
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 "checksum darling_core 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "6afc018370c3bff3eb51f89256a6bdb18b4fdcda72d577982a14954a7a0b402c"
 "checksum darling_macro 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c6d8dac1c6f1d29a41c4712b4400f878cb4fcc4c7628f298dd75038e024998d1"
-"checksum debug_stub_derive 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "496b7f8a2f853313c3ca370641d7ff3e42c32974fdccda8f0684599ed0a3ff6b"
 "checksum derive_builder 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3ac53fa6a3cda160df823a9346442525dcaf1e171999a1cf23e67067e4fd64d4"
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@@ -3005,7 +2906,6 @@ dependencies = [
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 "checksum itertools 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5b8467d9c1cebe26feb08c640139247fac215782d35371ade9a2136ed6085358"
 "checksum itoa 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "501266b7edd0174f8530248f87f99c88fbe60ca4ef3dd486835b8d8d53136f7f"
-"checksum jetscii 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)" = "5f25cca2463cb19dbb1061eb3bd38a8b5e4ce1cc5a5a9fc0e02de486d92b9b05"
 "checksum keccak 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "67c21572b4949434e4fc1e1978b99c5f77064153c59d998bf13ecd96fb5ecba7"
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@@ -3073,12 +2973,10 @@ dependencies = [
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@@ -3112,7 +3010,6 @@ dependencies = [
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-"checksum rusty-fork 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "3dd93264e10c577503e926bd1430193eeb5d21b059148910082245309b424fae"
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@@ -3146,11 +3043,9 @@ dependencies = [
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@@ -3180,7 +3075,6 @@ dependencies = [
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@@ -3192,7 +3086,6 @@ dependencies = [
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--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,14 +50,11 @@ image-meta = "0.1.0"
 quick-xml = "0.15.0"
 escaper = "0.1.0"
 bitflags = "1.1.0"
-jetscii = "0.4.4"
-debug_stub_derive = "0.3.0"

 [dev-dependencies]
 tempfile = "3.0"
 pretty_assertions = "0.6.1"
 pretty_env_logger = "0.3.0"
-proptest = "0.9.4"

 [workspace]
 members = [
--- a/ci_scripts/run_all.sh
+++ b/ci_scripts/run_all.sh
@@ -41,8 +41,7 @@ if [ -n "$TESTS" ]; then
    # see https://github.com/deltachat/deltachat-core-rust/issues/331
    # unset DCC_PY_LIVECONFIG

-    tox --workdir "$TOXWORKDIR" -e lint,py35,py36,py37,auditwheels -- -k "not qr"
-    tox --workdir "$TOXWORKDIR" -e py35,py36,py37 -- -k "qr"
+    tox --workdir "$TOXWORKDIR" -e lint,py35,py36,py37,auditwheels
    popd
 fi

--- a/deltachat-ffi/deltachat.h
+++ b/deltachat-ffi/deltachat.h
@@ -393,9 +393,8 @@ int             dc_set_config                (dc_context_t* context, const char*
 * @memberof dc_context_t
 * @param context The context object as created by dc_context_new(). For querying system values, this can be NULL.
 * @param key The key to query.
- * @return Returns current value of "key", if "key" is unset, the default
- *     value is returned.  The returned value must be free()'d, NULL is never
- *     returned.  If there is an error an empty string will be returned.
+ * @return Returns current value of "key", if "key" is unset, the default value is returned.
+ *     The returned value must be free()'d, NULL is never returned.
 */
 char*           dc_get_config                (dc_context_t* context, const char* key);

--- a/deltachat-ffi/src/lib.rs
+++ b/deltachat-ffi/src/lib.rs
--- a/deltachat_derive/src/lib.rs
+++ b/deltachat_derive/src/lib.rs
@@ -36,7 +36,7 @@ pub fn from_sql_derive(input: TokenStream) -> TokenStream {
        impl rusqlite::types::FromSql for #name {
            fn column_result(col: rusqlite::types::ValueRef) -> rusqlite::types::FromSqlResult<Self> {
                let inner = rusqlite::types::FromSql::column_result(col)?;
-                Ok(num_traits::FromPrimitive::from_i64(inner).unwrap_or_default())
+                num_traits::FromPrimitive::from_i64(inner).ok_or(rusqlite::types::FromSqlError::InvalidType)
            }
        }
    };
--- a/examples/repl/cmdline.rs
+++ b/examples/repl/cmdline.rs
@@ -20,17 +20,18 @@ use deltachat::message::*;
 use deltachat::peerstate::*;
 use deltachat::qr::*;
 use deltachat::sql;
+use deltachat::types::*;
 use deltachat::x::*;
-use deltachat::Event;
+use num_traits::FromPrimitive;

 /// Reset database tables. This function is called from Core cmdline.
 /// Argument is a bitmask, executing single or multiple actions in one call.
 /// e.g. bitmask 7 triggers actions definded with bits 1, 2 and 4.
 pub unsafe fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
-    info!(context, "Resetting tables ({})...", bits);
+    info!(context, 0, "Resetting tables ({})...", bits);
    if 0 != bits & 1 {
        sql::execute(context, &context.sql, "DELETE FROM jobs;", params![]).unwrap();
-        info!(context, "(1) Jobs reset.");
+        info!(context, 0, "(1) Jobs reset.");
    }
    if 0 != bits & 2 {
        sql::execute(
@@ -40,11 +41,11 @@ pub unsafe fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
            params![],
        )
        .unwrap();
-        info!(context, "(2) Peerstates reset.");
+        info!(context, 0, "(2) Peerstates reset.");
    }
    if 0 != bits & 4 {
        sql::execute(context, &context.sql, "DELETE FROM keypairs;", params![]).unwrap();
-        info!(context, "(4) Private keypairs reset.");
+        info!(context, 0, "(4) Private keypairs reset.");
    }
    if 0 != bits & 8 {
        sql::execute(
@@ -83,13 +84,10 @@ pub unsafe fn dc_reset_tables(context: &Context, bits: i32) -> i32 {
        )
        .unwrap();
        sql::execute(context, &context.sql, "DELETE FROM leftgrps;", params![]).unwrap();
-        info!(context, "(8) Rest but server config reset.");
+        info!(context, 0, "(8) Rest but server config reset.");
    }

-    context.call_cb(Event::MsgsChanged {
-        chat_id: 0,
-        msg_id: 0,
-    });
+    context.call_cb(Event::MSGS_CHANGED, 0, 0);

    1
 }
@@ -98,7 +96,7 @@ unsafe fn dc_poke_eml_file(context: &Context, filename: *const libc::c_char) ->
    /* mainly for testing, may be called by dc_import_spec() */
    let mut success: libc::c_int = 0i32;
    let mut data: *mut libc::c_char = ptr::null_mut();
-    let mut data_bytes = 0;
+    let mut data_bytes: size_t = 0;
    if !(dc_read_file(
        context,
        filename,
@@ -124,7 +122,7 @@ unsafe fn dc_poke_eml_file(context: &Context, filename: *const libc::c_char) ->
 /// @return 1=success, 0=error.
 unsafe fn poke_spec(context: &Context, spec: *const libc::c_char) -> libc::c_int {
    if !context.sql.is_open() {
-        error!(context, "Import: Database not opened.");
+        error!(context, 0, "Import: Database not opened.");
        return 0;
    }

@@ -145,7 +143,7 @@ unsafe fn poke_spec(context: &Context, spec: *const libc::c_char) -> libc::c_int
    } else {
        let rs = context.sql.get_config(context, "import_spec");
        if rs.is_none() {
-            error!(context, "Import: No file or folder given.");
+            error!(context, 0, "Import: No file or folder given.");
            ok_to_continue = false;
        } else {
            ok_to_continue = true;
@@ -168,6 +166,7 @@ unsafe fn poke_spec(context: &Context, spec: *const libc::c_char) -> libc::c_int
            if dir.is_err() {
                error!(
                    context,
+                    0,
                    "Import: Cannot open directory \"{}\".",
                    as_str(real_spec),
                );
@@ -183,7 +182,7 @@ unsafe fn poke_spec(context: &Context, spec: *const libc::c_char) -> libc::c_int
                    let name = name_f.to_string_lossy();
                    if name.ends_with(".eml") {
                        let path_plus_name = format!("{}/{}", as_str(real_spec), name);
-                        info!(context, "Import: {}", path_plus_name);
+                        info!(context, 0, "Import: {}", path_plus_name);
                        let path_plus_name_c = CString::yolo(path_plus_name);
                        if 0 != dc_poke_eml_file(context, path_plus_name_c.as_ptr()) {
                            read_cnt += 1
@@ -196,15 +195,13 @@ unsafe fn poke_spec(context: &Context, spec: *const libc::c_char) -> libc::c_int
        if ok_to_continue2 {
            info!(
                context,
+                0,
                "Import: {} items read from \"{}\".",
                read_cnt,
                as_str(real_spec)
            );
            if read_cnt > 0 {
-                context.call_cb(Event::MsgsChanged {
-                    chat_id: 0,
-                    msg_id: 0,
-                });
+                context.call_cb(Event::MSGS_CHANGED, 0 as uintptr_t, 0 as uintptr_t);
            }
            success = 1
        }
@@ -231,10 +228,11 @@ unsafe fn log_msg(context: &Context, prefix: impl AsRef<str>, msg: &Message) {
    let msgtext = dc_msg_get_text(msg);
    info!(
        context,
+        0,
        "{}#{}{}{}: {} (Contact#{}): {} {}{}{}{} [{}]",
        prefix.as_ref(),
        dc_msg_get_id(msg) as libc::c_int,
-        if dc_msg_get_showpadlock(msg) {
+        if 0 != dc_msg_get_showpadlock(msg) {
            "🔒"
        } else {
            ""
@@ -253,7 +251,11 @@ unsafe fn log_msg(context: &Context, prefix: impl AsRef<str>, msg: &Message) {
        } else {
            "[FRESH]"
        },
-        if dc_msg_is_info(msg) { "[INFO]" } else { "" },
+        if 0 != dc_msg_is_info(msg) {
+            "[INFO]"
+        } else {
+            ""
+        },
        statestr,
        &temp2,
    );
@@ -266,6 +268,7 @@ unsafe fn log_msglist(context: &Context, msglist: &Vec<u32>) -> Result<(), Error
        if msg_id == 9 as libc::c_uint {
            info!(
                context,
+                0,
                "--------------------------------------------------------------------------------"
            );

@@ -273,7 +276,7 @@ unsafe fn log_msglist(context: &Context, msglist: &Vec<u32>) -> Result<(), Error
        } else if msg_id > 0 {
            if lines_out == 0 {
                info!(
-                    context,
+                    context, 0,
                    "--------------------------------------------------------------------------------",
                );
                lines_out += 1
@@ -285,7 +288,7 @@ unsafe fn log_msglist(context: &Context, msglist: &Vec<u32>) -> Result<(), Error
    if lines_out > 0 {
        info!(
            context,
-            "--------------------------------------------------------------------------------"
+            0, "--------------------------------------------------------------------------------"
        );
    }
    Ok(())
@@ -302,7 +305,7 @@ unsafe fn log_contactlist(context: &Context, contacts: &Vec<u32>) {
        if let Ok(contact) = Contact::get_by_id(context, contact_id) {
            let name = contact.get_name();
            let addr = contact.get_addr();
-            let verified_state = contact.is_verified(context);
+            let verified_state = contact.is_verified();
            let verified_str = if VerifiedStatus::Unverified != verified_state {
                if verified_state == VerifiedStatus::BidirectVerified {
                    " √√"
@@ -334,11 +337,17 @@ unsafe fn log_contactlist(context: &Context, contacts: &Vec<u32>) {
                );
            }

-            info!(context, "Contact#{}: {}{}", contact_id, line, line2);
+            info!(context, 0, "Contact#{}: {}{}", contact_id, line, line2);
        }
    }
 }

+static mut S_IS_AUTH: libc::c_int = 0;
+
+pub unsafe fn dc_cmdline_skip_auth() {
+    S_IS_AUTH = 1;
+}
+
 fn chat_prefix(chat: &Chat) -> &'static str {
    chat.typ.into()
 }
@@ -419,7 +428,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                 send <text>\n\
                 send-garbage\n\
                 sendimage <file> [<text>]\n\
-                 sendfile <file> [<text>]\n\
+                 sendfile <file>\n\
                 draft [<text>]\n\
                 listmedia\n\
                 archive <chat-id>\n\
@@ -452,6 +461,28 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                 ============================================="
            ),
        },
+        "auth" => {
+            if 0 == S_IS_AUTH {
+                let is_pw = context
+                    .get_config(config::Config::MailPw)
+                    .unwrap_or_default();
+                if arg1 == is_pw {
+                    S_IS_AUTH = 1;
+                } else {
+                    println!("Bad password.");
+                }
+            } else {
+                println!("Already authorized.");
+            }
+        }
+        "open" => {
+            ensure!(!arg1.is_empty(), "Argument <file> missing");
+            dc_close(context);
+            ensure!(dc_open(context, arg1, None), "Open failed");
+        }
+        "close" => {
+            dc_close(context);
+        }
        "initiate-key-transfer" => {
            let setup_code = dc_initiate_key_transfer(context);
            if !setup_code.is_null() {
@@ -469,7 +500,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            let msg_id: u32 = arg1.parse()?;
            let msg = dc_get_msg(context, msg_id)?;
            if dc_msg_is_setupmessage(&msg) {
-                let setupcodebegin = dc_msg_get_setupcodebegin(context, &msg);
+                let setupcodebegin = dc_msg_get_setupcodebegin(&msg);
                println!(
                    "The setup code for setup message Msg#{} starts with: {}",
                    msg_id,
@@ -485,7 +516,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                !arg1.is_empty() && !arg2.is_empty(),
                "Arguments <msg-id> <setup-code> expected"
            );
-            if !dc_continue_key_transfer(context, arg1.parse()?, arg2_c) {
+            if 0 == dc_continue_key_transfer(context, arg1.parse()?, arg2_c) {
                bail!("Continue key transfer failed");
            }
        }
@@ -496,17 +527,17 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            }
        }
        "export-backup" => {
-            dc_imex(context, 11, Some(context.get_blobdir()), ptr::null());
+            dc_imex(context, 11, context.get_blobdir(), ptr::null());
        }
        "import-backup" => {
            ensure!(!arg1.is_empty(), "Argument <backup-file> missing.");
-            dc_imex(context, 12, Some(arg1), ptr::null());
+            dc_imex(context, 12, arg1_c, ptr::null());
        }
        "export-keys" => {
-            dc_imex(context, 1, Some(context.get_blobdir()), ptr::null());
+            dc_imex(context, 1, context.get_blobdir(), ptr::null());
        }
        "import-keys" => {
-            dc_imex(context, 2, Some(context.get_blobdir()), ptr::null());
+            dc_imex(context, 2, context.get_blobdir(), ptr::null());
        }
        "export-setup" => {
            let setup_code = dc_create_setup_code(context);
@@ -548,7 +579,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            println!("{}={:?}", key, val);
        }
        "info" => {
-            println!("{:#?}", context.get_info());
+            println!("{}", to_string(dc_get_info(context)));
        }
        "maybenetwork" => {
            maybe_network(context);
@@ -568,16 +599,17 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            let cnt = chatlist.len();
            if cnt > 0 {
                info!(
-                    context,
+                    context, 0,
                    "================================================================================"
                );

                for i in (0..cnt).rev() {
                    let chat = Chat::load_from_db(context, chatlist.get_chat_id(i))?;
-                    let temp_subtitle = chat.get_subtitle(context);
+                    let temp_subtitle = chat.get_subtitle();
                    let temp_name = chat.get_name();
                    info!(
                        context,
+                        0,
                        "{}#{}: {} [{}] [{} fresh]",
                        chat_prefix(&chat),
                        chat.get_id(),
@@ -585,7 +617,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                        temp_subtitle,
                        chat::get_fresh_msg_cnt(context, chat.get_id()),
                    );
-                    let lot = chatlist.get_summary(context, i, Some(&chat));
+                    let lot = chatlist.get_summary(i, Some(&chat));
                    let statestr = if chat.is_archived() {
                        " [Archived]"
                    } else {
@@ -602,6 +634,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                    let text2 = lot.get_text2();
                    info!(
                        context,
+                        0,
                        "{}{}{}{} [{}]{}",
                        text1.unwrap_or(""),
                        if text1.is_some() { ": " } else { "" },
@@ -615,13 +648,13 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                        },
                    );
                    info!(
-                        context,
+                        context, 0,
                        "================================================================================"
                    );
                }
            }
-            if location::is_sending_locations_to_chat(context, 0) {
-                info!(context, "Location streaming enabled.");
+            if location::is_sending_locations_to_chat(context, 0 as uint32_t) {
+                info!(context, 0, "Location streaming enabled.");
            }
            println!("{} chats", cnt);
        }
@@ -640,10 +673,11 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            let sel_chat = sel_chat.as_ref().unwrap();

            let msglist = chat::get_chat_msgs(context, sel_chat.get_id(), 0x1, 0);
-            let temp2 = sel_chat.get_subtitle(context);
+            let temp2 = sel_chat.get_subtitle();
            let temp_name = sel_chat.get_name();
            info!(
                context,
+                0,
                "{}#{}: {} [{}]{}",
                chat_prefix(sel_chat),
                sel_chat.get_id(),
@@ -656,7 +690,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                },
            );
            log_msglist(context, &msglist)?;
-            if let Some(draft) = chat::get_draft(context, sel_chat.get_id())? {
+            if let Ok(draft) = chat::get_draft(context, sel_chat.get_id()) {
                log_msg(context, "Draft", &draft);
            }

@@ -669,7 +703,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
        "createchat" => {
            ensure!(!arg1.is_empty(), "Argument <contact-id> missing.");
            let contact_id: libc::c_int = arg1.parse()?;
-            let chat_id = chat::create_by_contact_id(context, contact_id as u32)?;
+            let chat_id = chat::create_by_contact_id(context, contact_id as uint32_t)?;

            println!("Single#{} created successfully.", chat_id,);
        }
@@ -698,10 +732,10 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            ensure!(!arg1.is_empty(), "Argument <contact-id> missing.");

            let contact_id_0: libc::c_int = arg1.parse()?;
-            if chat::add_contact_to_chat(
+            if 0 != chat::add_contact_to_chat(
                context,
                sel_chat.as_ref().unwrap().get_id(),
-                contact_id_0 as u32,
+                contact_id_0 as uint32_t,
            ) {
                println!("Contact added to chat.");
            } else {
@@ -715,7 +749,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            chat::remove_contact_from_chat(
                context,
                sel_chat.as_ref().unwrap().get_id(),
-                contact_id_1 as u32,
+                contact_id_1 as uint32_t,
            )?;

            println!("Contact added to chat.");
@@ -739,7 +773,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            ensure!(sel_chat.is_some(), "No chat selected.");

            let contacts = chat::get_chat_contacts(context, sel_chat.as_ref().unwrap().get_id());
-            info!(context, "Memberlist:");
+            info!(context, 0, "Memberlist:");

            log_contactlist(context, &contacts);
            println!(
@@ -767,6 +801,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                let marker = location.marker.as_ref().unwrap_or(&default_marker);
                info!(
                    context,
+                    0,
                    "Loc#{}: {}: lat={} lng={} acc={} Chat#{} Contact#{} Msg#{} {}",
                    location.location_id,
                    dc_timestamp_to_str(location.timestamp),
@@ -780,7 +815,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                );
            }
            if locations.is_empty() {
-                info!(context, "No locations.");
+                info!(context, 0, "No locations.");
            }
        }
        "sendlocations" => {
@@ -827,17 +862,18 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
        }
        "sendimage" | "sendfile" => {
            ensure!(sel_chat.is_some(), "No chat selected.");
-            ensure!(!arg1.is_empty(), "No file given.");
+            ensure!(!arg1.is_empty() && !arg2.is_empty(), "No file given.");

-            let mut msg = dc_msg_new(if arg0 == "sendimage" {
-                Viewtype::Image
-            } else {
-                Viewtype::File
-            });
+            let mut msg = dc_msg_new(
+                context,
+                if arg0 == "sendimage" {
+                    Viewtype::Image
+                } else {
+                    Viewtype::File
+                },
+            );
            dc_msg_set_file(&mut msg, arg1_c, ptr::null());
-            if !arg2.is_empty() {
-                dc_msg_set_text(&mut msg, arg2_c);
-            }
+            dc_msg_set_text(&mut msg, arg2_c);
            chat::send_msg(context, sel_chat.as_ref().unwrap().get_id(), &mut msg)?;
        }
        "listmsgs" => {
@@ -849,7 +885,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                0 as libc::c_uint
            };

-            let msglist = context.search_msgs(chat, arg1);
+            let msglist = dc_search_msgs(context, chat, arg1_c);

            log_msglist(context, &msglist)?;
            println!("{} messages.", msglist.len());
@@ -858,7 +894,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            ensure!(sel_chat.is_some(), "No chat selected.");

            if !arg1.is_empty() {
-                let mut draft = dc_msg_new(Viewtype::Text);
+                let mut draft = dc_msg_new(context, Viewtype::Text);
                dc_msg_set_text(&mut draft, arg1_c);
                chat::set_draft(
                    context,
@@ -912,7 +948,7 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
            println!("{}", as_str(res));
        }
        "listfresh" => {
-            let msglist = context.get_fresh_msgs();
+            let msglist = dc_get_fresh_msgs(context);

            log_msglist(context, &msglist)?;
            print!("{} fresh messages.", msglist.len());
@@ -1018,17 +1054,16 @@ pub unsafe fn dc_cmdline(context: &Context, line: &str) -> Result<(), failure::E
                res.get_text2()
            );
        }
-        // TODO: implement this again, unclear how to match this through though, without writing a parser.
-        // "event" => {
-        //     ensure!(!arg1.is_empty(), "Argument <id> missing.");
-        //     let event = arg1.parse()?;
-        //     let event = Event::from_u32(event).ok_or(format_err!("Event::from_u32({})", event))?;
-        //     let r = context.call_cb(event, 0 as libc::uintptr_t, 0 as libc::uintptr_t);
-        //     println!(
-        //         "Sending event {:?}({}), received value {}.",
-        //         event, event as usize, r as libc::c_int,
-        //     );
-        // }
+        "event" => {
+            ensure!(!arg1.is_empty(), "Argument <id> missing.");
+            let event = arg1.parse()?;
+            let event = Event::from_u32(event).ok_or(format_err!("Event::from_u32({})", event))?;
+            let r = context.call_cb(event, 0 as uintptr_t, 0 as uintptr_t);
+            println!(
+                "Sending event {:?}({}), received value {}.",
+                event, event as usize, r as libc::c_int,
+            );
+        }
        "fileinfo" => {
            ensure!(!arg1.is_empty(), "Argument <file> missing.");

--- a/examples/repl/main.rs
+++ b/examples/repl/main.rs
@@ -15,20 +15,21 @@ extern crate rusqlite;

 use std::borrow::Cow::{self, Borrowed, Owned};
 use std::io::{self, Write};
-use std::path::Path;
 use std::process::Command;
+use std::ptr;
 use std::sync::atomic::{AtomicBool, Ordering};
 use std::sync::{Arc, Mutex, RwLock};

 use deltachat::config;
 use deltachat::configure::*;
+use deltachat::constants::*;
 use deltachat::context::*;
 use deltachat::dc_tools::*;
 use deltachat::job::*;
 use deltachat::oauth2::*;
 use deltachat::securejoin::*;
+use deltachat::types::*;
 use deltachat::x::*;
-use deltachat::Event;
 use rustyline::completion::{Completer, FilenameCompleter, Pair};
 use rustyline::config::OutputStreamType;
 use rustyline::error::ReadlineError;
@@ -43,75 +44,96 @@ use self::cmdline::*;

 // Event Handler

-fn receive_event(_context: &Context, event: Event) -> libc::uintptr_t {
+unsafe extern "C" fn receive_event(
+    _context: &Context,
+    event: Event,
+    data1: uintptr_t,
+    data2: uintptr_t,
+) -> uintptr_t {
    match event {
-        Event::GetString { .. } => {}
-        Event::Info(msg) => {
+        Event::GET_STRING => {}
+        Event::INFO => {
            /* do not show the event as this would fill the screen */
-            println!("{}", msg);
+            println!("{}", to_string(data2 as *const _),);
        }
-        Event::SmtpConnected(msg) => {
-            println!("[DC_EVENT_SMTP_CONNECTED] {}", msg);
+        Event::SMTP_CONNECTED => {
+            println!("[DC_EVENT_SMTP_CONNECTED] {}", to_string(data2 as *const _));
        }
-        Event::ImapConnected(msg) => {
-            println!("[DC_EVENT_IMAP_CONNECTED] {}", msg);
+        Event::IMAP_CONNECTED => {
+            println!("[DC_EVENT_IMAP_CONNECTED] {}", to_string(data2 as *const _),);
        }
-        Event::SmtpMessageSent(msg) => {
-            println!("[DC_EVENT_SMTP_MESSAGE_SENT] {}", msg);
-        }
-        Event::Warning(msg) => {
-            println!("[Warning] {}", msg);
-        }
-        Event::Error(msg) => {
-            println!("\x1b[31m[DC_EVENT_ERROR] {}\x1b[0m", msg);
-        }
-        Event::ErrorNetwork(msg) => {
-            println!("\x1b[31m[DC_EVENT_ERROR_NETWORK] msg={}\x1b[0m", msg);
-        }
-        Event::ErrorSelfNotInGroup(msg) => {
-            println!("\x1b[31m[DC_EVENT_ERROR_SELF_NOT_IN_GROUP] {}\x1b[0m", msg);
-        }
-        Event::MsgsChanged { chat_id, msg_id } => {
-            print!(
-                "\x1b[33m{{Received DC_EVENT_MSGS_CHANGED(chat_id={}, msg_id={})}}\n\x1b[0m",
-                chat_id, msg_id,
+        Event::SMTP_MESSAGE_SENT => {
+            println!(
+                "[DC_EVENT_SMTP_MESSAGE_SENT] {}",
+                to_string(data2 as *const _),
            );
        }
-        Event::ContactsChanged(_) => {
+        Event::WARNING => {
+            println!("[Warning] {}", to_string(data2 as *const _),);
+        }
+        Event::ERROR => {
+            println!(
+                "\x1b[31m[DC_EVENT_ERROR] {}\x1b[0m",
+                to_string(data2 as *const _),
+            );
+        }
+        Event::ERROR_NETWORK => {
+            println!(
+                "\x1b[31m[DC_EVENT_ERROR_NETWORK] first={}, msg={}\x1b[0m",
+                data1 as usize,
+                to_string(data2 as *const _),
+            );
+        }
+        Event::ERROR_SELF_NOT_IN_GROUP => {
+            println!(
+                "\x1b[31m[DC_EVENT_ERROR_SELF_NOT_IN_GROUP] {}\x1b[0m",
+                to_string(data2 as *const _),
+            );
+        }
+        Event::MSGS_CHANGED => {
+            print!(
+                "\x1b[33m{{Received DC_EVENT_MSGS_CHANGED({}, {})}}\n\x1b[0m",
+                data1 as usize, data2 as usize,
+            );
+        }
+        Event::CONTACTS_CHANGED => {
            print!("\x1b[33m{{Received DC_EVENT_CONTACTS_CHANGED()}}\n\x1b[0m");
        }
-        Event::LocationChanged(contact) => {
+        Event::LOCATION_CHANGED => {
            print!(
-                "\x1b[33m{{Received DC_EVENT_LOCATION_CHANGED(contact={:?})}}\n\x1b[0m",
-                contact,
+                "\x1b[33m{{Received DC_EVENT_LOCATION_CHANGED(contact={})}}\n\x1b[0m",
+                data1 as usize,
            );
        }
-        Event::ConfigureProgress(progress) => {
+        Event::CONFIGURE_PROGRESS => {
            print!(
                "\x1b[33m{{Received DC_EVENT_CONFIGURE_PROGRESS({} ‰)}}\n\x1b[0m",
-                progress,
+                data1 as usize,
            );
        }
-        Event::ImexProgress(progress) => {
+        Event::IMEX_PROGRESS => {
            print!(
                "\x1b[33m{{Received DC_EVENT_IMEX_PROGRESS({} ‰)}}\n\x1b[0m",
-                progress,
+                data1 as usize,
            );
        }
-        Event::ImexFileWritten(file) => {
+        Event::IMEX_FILE_WRITTEN => {
            print!(
                "\x1b[33m{{Received DC_EVENT_IMEX_FILE_WRITTEN({})}}\n\x1b[0m",
-                file.display()
+                to_string(data1 as *const _)
            );
        }
-        Event::ChatModified(chat) => {
+        Event::CHAT_MODIFIED => {
            print!(
                "\x1b[33m{{Received DC_EVENT_CHAT_MODIFIED({})}}\n\x1b[0m",
-                chat
+                data1 as usize,
            );
        }
        _ => {
-            print!("\x1b[33m{{Received {:?}}}\n\x1b[0m", event);
+            print!(
+                "\x1b[33m{{Received {:?}({}, {})}}\n\x1b[0m",
+                event, data1 as usize, data2 as usize,
+            );
        }
    }

@@ -365,15 +387,17 @@ impl Highlighter for DcHelper {
 impl Helper for DcHelper {}

 fn main_0(args: Vec<String>) -> Result<(), failure::Error> {
-    if args.len() < 2 {
+    let mut context = dc_context_new(Some(receive_event), ptr::null_mut(), Some("CLI".into()));
+
+    unsafe { dc_cmdline_skip_auth() };
+
+    if args.len() == 2 {
+        if unsafe { !dc_open(&mut context, &args[1], None) } {
+            println!("Error: Cannot open {}.", args[0],);
+        }
+    } else if args.len() != 1 {
        println!("Error: Bad arguments, expected [db-name].");
-        return Err(format_err!("No db-name specified"));
    }
-    let context = Context::new(
-        Box::new(receive_event),
-        "CLI".into(),
-        Path::new(&args[1]).to_path_buf(),
-    )?;

    println!("Delta Chat Core is awaiting your commands.");

--- a/examples/simple.rs
+++ b/examples/simple.rs
@@ -1,5 +1,6 @@
 extern crate deltachat;

+use std::ffi::CStr;
 use std::sync::{Arc, RwLock};
 use std::{thread, time};
 use tempfile::tempdir;
@@ -8,43 +9,42 @@ use deltachat::chat;
 use deltachat::chatlist::*;
 use deltachat::config;
 use deltachat::configure::*;
+use deltachat::constants::Event;
 use deltachat::contact::*;
 use deltachat::context::*;
 use deltachat::job::{
    perform_imap_fetch, perform_imap_idle, perform_imap_jobs, perform_smtp_idle, perform_smtp_jobs,
 };
-use deltachat::Event;

-fn cb(_ctx: &Context, event: Event) -> usize {
-    print!("[{:?}]", event);
+extern "C" fn cb(_ctx: &Context, event: Event, data1: usize, data2: usize) -> usize {
+    println!("[{:?}]", event);

    match event {
-        Event::ConfigureProgress(progress) => {
-            print!("  progress: {}\n", progress);
+        Event::CONFIGURE_PROGRESS => {
+            println!("  progress: {}", data1);
            0
        }
-        Event::Info(msg) | Event::Warning(msg) | Event::Error(msg) | Event::ErrorNetwork(msg) => {
-            print!("  {}\n", msg);
-            0
-        }
-        _ => {
-            print!("\n");
+        Event::INFO | Event::WARNING | Event::ERROR | Event::ERROR_NETWORK => {
+            println!(
+                "  {}",
+                unsafe { CStr::from_ptr(data2 as *const _) }
+                    .to_str()
+                    .unwrap()
+            );
            0
        }
+        _ => 0,
    }
 }

 fn main() {
    unsafe {
-        let dir = tempdir().unwrap();
-        let dbfile = dir.path().join("db.sqlite");
-        println!("creating database {:?}", dbfile);
-        let ctx =
-            Context::new(Box::new(cb), "FakeOs".into(), dbfile).expect("Failed to create context");
+        let ctx = dc_context_new(Some(cb), std::ptr::null_mut(), None);
        let running = Arc::new(RwLock::new(true));
-        let info = ctx.get_info();
+        let info = dc_get_info(&ctx);
+        let info_s = CStr::from_ptr(info);
        let duration = time::Duration::from_millis(4000);
-        println!("info: {:#?}", info);
+        println!("info: {}", info_s.to_str().unwrap());

        let ctx = Arc::new(ctx);
        let ctx1 = ctx.clone();
@@ -73,6 +73,13 @@ fn main() {
            }
        });

+        let dir = tempdir().unwrap();
+        let dbfile = dir.path().join("db.sqlite");
+
+        println!("opening database {:?}", dbfile);
+
+        assert!(dc_open(&ctx, dbfile.to_str().unwrap(), None));
+
        println!("configuring");
        let args = std::env::args().collect::<Vec<String>>();
        assert_eq!(args.len(), 2, "missing password");
@@ -94,7 +101,7 @@ fn main() {
        let chats = Chatlist::try_load(&ctx, 0, None, None).unwrap();

        for i in 0..chats.len() {
-            let summary = chats.get_summary(&ctx, 0, None);
+            let summary = chats.get_summary(0, None);
            let text1 = summary.get_text1();
            let text2 = summary.get_text2();
            println!("chat: {} - {:?} - {:?}", i, text1, text2,);
@@ -123,5 +130,6 @@ fn main() {
        t2.join().unwrap();

        println!("closing");
+        dc_close(&ctx);
    }
 }
--- a/proptest-regressions/dc_strencode.txt
+++ b/proptest-regressions/dc_strencode.txt
@@ -1,7 +0,0 @@
-# Seeds for failure cases proptest has generated in the past. It is
-# automatically read and these particular cases re-run before any
-# novel cases are generated.
-#
-# It is recommended to check this file in to source control so that
-# everyone who runs the test benefits from these saved cases.
-cc 679506fe9ac59df773f8cfa800fdab5f0a32fe49d2ab370394000a1aa5bc2a72 # shrinks to buf = "%0A"
--- a/proptest-regressions/dc_tools.txt
+++ b/proptest-regressions/dc_tools.txt
@@ -1,9 +0,0 @@
-# Seeds for failure cases proptest has generated in the past. It is
-# automatically read and these particular cases re-run before any
-# novel cases are generated.
-#
-# It is recommended to check this file in to source control so that
-# everyone who runs the test benefits from these saved cases.
-cc c310754465ee0261807b96fa9bcc4861ff9aa286e94667524b5960c69f9b6620 # shrinks to buf = "", approx_chars = 0, do_unwrap = false
-cc 5fd8d730b0a9cdf7308ce58818ca9aefc0255c9ba2a0878944fc48d43a67315b # shrinks to buf = "𑒀ὐ￠🜀\u{1e01b}A a🟠", approx_chars = 0, do_unwrap = false
-cc c6a0029a54137a4b9efc9ef2ea6d9a7dd1d60d1c937bb472b66a174618ba8013 # shrinks to buf = "𐠈0Aᝮa𫝀®!ꫛa¡0A𐢧00𐹠®A  丽ⷐએ  ", approx_chars = 0, do_unwrap = false
--- a/python/README.rst
+++ b/python/README.rst
@@ -65,7 +65,7 @@ Afterwards ``which python`` tells you that it comes out of the "venv"
 directory that contains all python install artifacts. Let's first
 install test tools::

-    pip install pytest pytest-timeout pytest-rerunfailures requests
+    pip install pytest pytest-timeout requests

 then cargo-build and install the deltachat bindings::

--- a/python/src/deltachat/account.py
+++ b/python/src/deltachat/account.py
@@ -483,10 +483,6 @@ class EventLogger:
    def set_timeout(self, timeout):
        self._timeout = timeout

-    def consume_events(self, check_error=True):
-        while not self._event_queue.empty():
-            self.get()
-
    def get(self, timeout=None, check_error=True):
        timeout = timeout or self._timeout
        ev = self._event_queue.get(timeout=timeout)
--- a/python/src/deltachat/chatting.py
+++ b/python/src/deltachat/chatting.py
@@ -1,7 +1,6 @@
 """ chatting related objects: Contact, Chat, Message. """

 import mimetypes
-import os
 from . import props
 from .cutil import as_dc_charpointer, from_dc_charpointer, iter_array
 from .capi import lib, ffi
@@ -316,46 +315,3 @@ class Chat(object):
        return list(iter_array(
            dc_array, lambda id: Contact(self._dc_context, id))
        )
-
-    def set_profile_image(self, img_path):
-        """Set group profile image.
-
-        If the group is already promoted (any message was sent to the group),
-        all group members are informed by a special status message that is sent
-        automatically by this function.
-        :params img_path: path to image object
-        :raises ValueError: if profile image could not be set
-        :returns: None
-        """
-        assert os.path.exists(img_path), img_path
-        p = as_dc_charpointer(img_path)
-        res = lib.dc_set_chat_profile_image(self._dc_context, self.id, p)
-        if res != 1:
-            raise ValueError("Setting Profile Image {!r} failed".format(p))
-
-    def remove_profile_image(self):
-        """remove group profile image.
-
-        If the group is already promoted (any message was sent to the group),
-        all group members are informed by a special status message that is sent
-        automatically by this function.
-        :raises ValueError: if profile image could not be reset
-        :returns: None
-        """
-        res = lib.dc_set_chat_profile_image(self._dc_context, self.id, ffi.NULL)
-        if res != 1:
-            raise ValueError("Removing Profile Image failed")
-
-    def get_profile_image(self):
-        """Get group profile image.
-
-        For groups, this is the image set by any group member using
-        set_chat_profile_image(). For normal chats, this is the image
-        set by each remote user on their own using dc_set_config(context,
-        "selfavatar", image).
-        :returns: path to profile image, None if no profile image exists.
-        """
-        dc_res = lib.dc_chat_get_profile_image(self._dc_chat)
-        if dc_res == ffi.NULL:
-            return None
-        return from_dc_charpointer(dc_res)
--- a/python/tests/test_account.py
+++ b/python/tests/test_account.py
@@ -147,15 +147,6 @@ class TestOfflineChat:
        qr = chat.get_join_qr()
        assert ac2.check_qr(qr).is_ask_verifygroup

-    def test_get_set_profile_image_simple(self, ac1, data):
-        chat = ac1.create_group_chat(name="title1")
-        p = data.get_path("d.png")
-        chat.set_profile_image(p)
-        p2 = chat.get_profile_image()
-        assert open(p, "rb").read() == open(p2, "rb").read()
-        chat.remove_profile_image()
-        assert chat.get_profile_image() is None
-
    def test_delete_and_send_fails(self, ac1, chat1):
        chat1.delete()
        ac1._evlogger.get_matching("DC_EVENT_MSGS_CHANGED")
@@ -598,59 +589,3 @@ class TestOnlineAccount:
        ch = ac2.qr_join_chat(qr)
        assert ch.id >= 10
        wait_securejoin_inviter_progress(ac1, 1000)
-
-    def test_set_get_profile_image(self, acfactory, data, lp):
-        ac1 = acfactory.get_online_configuring_account()
-        ac2 = acfactory.get_online_configuring_account()
-        wait_configuration_progress(ac2, 1000)
-        wait_configuration_progress(ac1, 1000)
-
-        lp.sec("create unpromoted group chat")
-        chat = ac1.create_group_chat("hello")
-        p = data.get_path("d.png")
-
-        lp.sec("ac1: set profile image on unpromoted chat")
-        chat.set_profile_image(p)
-        ac1._evlogger.get_matching("DC_EVENT_CHAT_MODIFIED")
-        assert not chat.is_promoted()
-
-        lp.sec("ac1: send text to promote chat (XXX without contact added)")
-        # XXX first promote the chat before adding contact
-        # because DC does not send out profile images for unpromoted chats
-        # otherwise
-        chat.send_text("ac1: initial message to promote chat (workaround)")
-        assert chat.is_promoted()
-
-        lp.sec("ac2: add ac1 to a chat so the message does not land in DEADDROP")
-        c1 = ac2.create_contact(email=ac1.get_config("addr"))
-        ac2.create_chat_by_contact(c1)
-        ev = ac2._evlogger.get_matching("DC_EVENT_MSGS_CHANGED")
-
-        lp.sec("ac1: add ac2 to promoted group chat")
-        c2 = ac1.create_contact(email=ac2.get_config("addr"))
-        chat.add_contact(c2)
-
-        lp.sec("ac1: send a first message to ac2")
-        chat.send_text("hi")
-        assert chat.is_promoted()
-
-        lp.sec("ac2: wait for receiving message from ac1")
-        ev = ac2._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
-        msg_in = ac2.get_message_by_id(ev[2])
-        assert not msg_in.chat.is_deaddrop()
-
-        lp.sec("ac2: create chat and read profile image")
-        chat2 = ac2.create_chat_by_message(msg_in)
-        p2 = chat2.get_profile_image()
-        assert p2 is not None
-        assert open(p2, "rb").read() == open(p, "rb").read()
-
-        ac2._evlogger.consume_events()
-        ac1._evlogger.consume_events()
-        lp.sec("ac2: delete profile image from chat")
-        chat2.remove_profile_image()
-        ev = ac1._evlogger.get_matching("DC_EVENT_INCOMING_MSG")
-        assert ev[1] == chat.id
-        chat1b = ac1.create_chat_by_message(ev[2])
-        assert chat1b.get_profile_image() is None
-        assert chat.get_profile_image() is None
--- a/python/tests/test_lowlevel.py
+++ b/python/tests/test_lowlevel.py
@@ -17,19 +17,11 @@ def test_callback_None2int():
    clear_context_callback(ctx)


-def test_dc_close_events(tmpdir):
-    ctx = ffi.gc(
-        capi.lib.dc_context_new(capi.lib.py_dc_callback, ffi.NULL, ffi.NULL),
-        lib.dc_context_unref,
-    )
+def test_dc_close_events():
+    ctx = capi.lib.dc_context_new(capi.lib.py_dc_callback, ffi.NULL, ffi.NULL)
    evlog = EventLogger(ctx)
    evlog.set_timeout(5)
-    set_context_callback(
-        ctx,
-        lambda ctx, evt_name, data1, data2: evlog(evt_name, data1, data2)
-    )
-    p = tmpdir.join("hello.db")
-    lib.dc_open(ctx, p.strpath.encode("ascii"), ffi.NULL)
+    set_context_callback(ctx, lambda ctx, evt_name, data1, data2: evlog(evt_name, data1, data2))
    capi.lib.dc_close(ctx)

    def find(info_string):
--- a/python/tox.ini
+++ b/python/tox.ini
@@ -16,10 +16,7 @@ passenv =
    DCC_PY_LIVECONFIG
 deps = 
    pytest
-    pytest-rerunfailures
-    pytest-timeout
-    pytest-xdist
-    auditwheel
+    pytest-faulthandler
    pdbpp
    requests

@@ -54,12 +51,11 @@ commands =


 [pytest]
-addopts = -v -rs --reruns 3 --reruns-delay 2
+addopts = -v -rs
 python_files = tests/test_*.py 
 norecursedirs = .tox 
 xfail_strict=true
-timeout = 60 
-timeout_method = thread
+timeout = 60

 [flake8]
 max-line-length = 120
--- a/src/aheader.rs
+++ b/src/aheader.rs
@@ -7,6 +7,7 @@ use mmime::mailimf_types::*;

 use crate::constants::*;
 use crate::contact::*;
+use crate::dc_tools::as_str;
 use crate::key::*;

 /// Possible values for encryption preference
@@ -63,8 +64,11 @@ impl Aheader {
        }
    }

-    pub fn from_imffields(wanted_from: &str, header: *const mailimf_fields) -> Option<Self> {
-        if header.is_null() {
+    pub fn from_imffields(
+        wanted_from: *const libc::c_char,
+        header: *const mailimf_fields,
+    ) -> Option<Self> {
+        if wanted_from.is_null() || header.is_null() {
            return None;
        }

@@ -90,7 +94,7 @@ impl Aheader {

                    match Self::from_str(value) {
                        Ok(test) => {
-                            if addr_cmp(&test.addr, wanted_from) {
+                            if addr_cmp(&test.addr, as_str(wanted_from)) {
                                if fine_header.is_none() {
                                    fine_header = Some(test);
                                } else {
--- a/src/chat.rs
+++ b/src/chat.rs
--- a/src/chatlist.rs
+++ b/src/chatlist.rs
@@ -31,13 +31,17 @@ use crate::stock::StockMessage;
 /// first entry and only present on new messages, there is the rough idea that it can be optionally always
 /// present and sorted into the list by date. Rendering the deaddrop in the described way
 /// would not add extra work in the UI then.
-#[derive(Debug)]
-pub struct Chatlist {
+pub struct Chatlist<'a> {
+    context: &'a Context,
    /// Stores pairs of `chat_id, message_id`
    ids: Vec<(u32, u32)>,
 }

-impl Chatlist {
+impl<'a> Chatlist<'a> {
+    pub fn get_context(&self) -> &Context {
+        self.context
+    }
+
    /// Get a list of chats.
    /// The list can be filtered by query parameters.
    ///
@@ -81,7 +85,7 @@ impl Chatlist {
    /// `query_contact_id`: An optional contact ID for filtering the list. Only chats including this contact ID
    ///     are returned.
    pub fn try_load(
-        context: &Context,
+        context: &'a Context,
        listflags: usize,
        query: Option<&str>,
        query_contact_id: Option<u32>,
@@ -196,7 +200,7 @@ impl Chatlist {
            ids.push((DC_CHAT_ID_ARCHIVED_LINK, 0));
        }

-        Ok(Chatlist { ids })
+        Ok(Chatlist { context, ids })
    }

    /// Find out the number of chats.
@@ -243,7 +247,7 @@ impl Chatlist {
    /// - dc_lot_t::timestamp: the timestamp of the message.  0 if not applicable.
    /// - dc_lot_t::state: The state of the message as one of the DC_STATE_* constants (see #dc_msg_get_state()).
    //    0 if not applicable.
-    pub fn get_summary(&self, context: &Context, index: usize, chat: Option<&Chat>) -> Lot {
+    pub fn get_summary(&self, index: usize, chat: Option<&Chat<'a>>) -> Lot {
        // The summary is created by the chat, not by the last message.
        // This is because we may want to display drafts here or stuff as
        // "is typing".
@@ -259,7 +263,7 @@ impl Chatlist {
        let chat = if let Some(chat) = chat {
            chat
        } else {
-            if let Ok(chat) = Chat::load_from_db(context, self.ids[index].0) {
+            if let Ok(chat) = Chat::load_from_db(self.context, self.ids[index].0) {
                chat_loaded = chat;
                &chat_loaded
            } else {
@@ -271,11 +275,11 @@ impl Chatlist {
        let mut lastcontact = None;

        let lastmsg = if 0 != lastmsg_id {
-            if let Ok(lastmsg) = dc_msg_load_from_db(context, lastmsg_id) {
+            if let Ok(lastmsg) = dc_msg_load_from_db(self.context, lastmsg_id) {
                if lastmsg.from_id != 1 as libc::c_uint
                    && (chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup)
                {
-                    lastcontact = Contact::load_from_db(context, lastmsg.from_id).ok();
+                    lastcontact = Contact::load_from_db(self.context, lastmsg.from_id).ok();
                }

                Some(lastmsg)
@@ -290,9 +294,14 @@ impl Chatlist {
            ret.text2 = None;
        } else if lastmsg.is_none() || lastmsg.as_ref().unwrap().from_id == DC_CONTACT_ID_UNDEFINED
        {
-            ret.text2 = Some(context.stock_str(StockMessage::NoMessages).to_string());
+            ret.text2 = Some(self.context.stock_str(StockMessage::NoMessages).to_string());
        } else {
-            ret.fill(&mut lastmsg.unwrap(), chat, lastcontact.as_ref(), context);
+            ret.fill(
+                &mut lastmsg.unwrap(),
+                chat,
+                lastcontact.as_ref(),
+                self.context,
+            );
        }

        ret
@@ -302,10 +311,11 @@ impl Chatlist {
 pub fn dc_get_archived_cnt(context: &Context) -> u32 {
    context
        .sql
-        .query_get_value(
+        .query_row_col(
            context,
            "SELECT COUNT(*) FROM chats WHERE blocked=0 AND archived=1;",
            params![],
+            0,
        )
        .unwrap_or_default()
 }
@@ -315,7 +325,7 @@ fn get_last_deaddrop_fresh_msg(context: &Context) -> u32 {
    // only few fresh messages.
    context
        .sql
-        .query_get_value(
+        .query_row_col(
            context,
            "SELECT m.id  FROM msgs m  LEFT JOIN chats c ON c.id=m.chat_id  \
             WHERE m.state=10   \
@@ -323,6 +333,7 @@ fn get_last_deaddrop_fresh_msg(context: &Context) -> u32 {
             AND c.blocked=2 \
             ORDER BY m.timestamp DESC, m.id DESC;",
            params![],
+            0,
        )
        .unwrap_or_default()
 }
--- a/src/config.rs
+++ b/src/config.rs
@@ -73,7 +73,7 @@ impl Context {
        let value = match key {
            Config::Selfavatar => {
                let rel_path = self.sql.get_config(self, key);
-                rel_path.map(|p| dc_get_abs_path(self, &p).to_str().unwrap().to_string())
+                rel_path.map(|p| dc_get_abs_path_safe(self, &p).to_str().unwrap().to_string())
            }
            Config::SysVersion => Some((&*DC_VERSION_STR).clone()),
            Config::SysMsgsizeMaxRecommended => Some(format!("{}", 24 * 1024 * 1024 / 4 * 3)),
--- a/src/configure/auto_mozilla.rs
+++ b/src/configure/auto_mozilla.rs
@@ -1,10 +1,9 @@
 use quick_xml;
 use quick_xml::events::{BytesEnd, BytesStart, BytesText};

-use crate::constants::*;
 use crate::context::Context;
+use crate::dc_loginparam::*;
 use crate::dc_tools::*;
-use crate::login_param::LoginParam;
 use crate::x::*;

 use super::read_autoconf_file;
@@ -14,10 +13,10 @@ use super::read_autoconf_file;
 /* documentation: https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration */
 #[repr(C)]
 struct moz_autoconfigure_t<'a> {
-    pub in_0: &'a LoginParam,
-    pub in_emaildomain: &'a str,
-    pub in_emaillocalpart: &'a str,
-    pub out: LoginParam,
+    pub in_0: &'a dc_loginparam_t,
+    pub in_emaildomain: *mut libc::c_char,
+    pub in_emaillocalpart: *mut libc::c_char,
+    pub out: dc_loginparam_t,
    pub out_imap_set: libc::c_int,
    pub out_smtp_set: libc::c_int,
    pub tag_server: libc::c_int,
@@ -27,37 +26,44 @@ struct moz_autoconfigure_t<'a> {
 pub unsafe fn moz_autoconfigure(
    context: &Context,
    url: &str,
-    param_in: &LoginParam,
-) -> Option<LoginParam> {
-    let xml_raw = read_autoconf_file(context, url);
+    param_in: &dc_loginparam_t,
+) -> Option<dc_loginparam_t> {
+    let mut moz_ac = moz_autoconfigure_t {
+        in_0: param_in,
+        in_emaildomain: std::ptr::null_mut(),
+        in_emaillocalpart: std::ptr::null_mut(),
+        out: dc_loginparam_new(),
+        out_imap_set: 0,
+        out_smtp_set: 0,
+        tag_server: 0,
+        tag_config: 0,
+    };
+
+    let url_c = url.strdup();
+    let xml_raw = read_autoconf_file(context, url_c);
+    free(url_c as *mut libc::c_void);
    if xml_raw.is_null() {
        return None;
    }

-    // Split address into local part and domain part.
-    let p = param_in.addr.find("@");
-    if p.is_none() {
+    moz_ac.in_emaillocalpart = param_in.addr.strdup();
+    let p = strchr(moz_ac.in_emaillocalpart, '@' as i32);
+
+    if p.is_null() {
        free(xml_raw as *mut libc::c_void);
+        free(moz_ac.in_emaildomain as *mut libc::c_void);
+        free(moz_ac.in_emaillocalpart as *mut libc::c_void);
        return None;
    }
-    let (in_emaillocalpart, in_emaildomain) = param_in.addr.split_at(p.unwrap());
-    let in_emaildomain = &in_emaildomain[1..];
+
+    *p = 0 as libc::c_char;
+    moz_ac.in_emaildomain = dc_strdup(p.offset(1isize));

    let mut reader = quick_xml::Reader::from_str(as_str(xml_raw));
    reader.trim_text(true);

    let mut buf = Vec::new();

-    let mut moz_ac = moz_autoconfigure_t {
-        in_0: param_in,
-        in_emaildomain,
-        in_emaillocalpart,
-        out: LoginParam::new(),
-        out_imap_set: 0,
-        out_smtp_set: 0,
-        tag_server: 0,
-        tag_config: 0,
-    };
    loop {
        match reader.read_event(&mut buf) {
            Ok(quick_xml::events::Event::Start(ref e)) => {
@@ -70,6 +76,7 @@ pub unsafe fn moz_autoconfigure(
            Err(e) => {
                error!(
                    context,
+                    0,
                    "Configure xml: Error at position {}: {:?}",
                    reader.buffer_position(),
                    e
@@ -86,13 +93,17 @@ pub unsafe fn moz_autoconfigure(
        || moz_ac.out.send_server.is_empty()
        || moz_ac.out.send_port == 0
    {
-        let r = moz_ac.out.to_string();
-        warn!(context, "Bad or incomplete autoconfig: {}", r,);
+        let r = dc_loginparam_get_readable(&moz_ac.out);
+        warn!(context, 0, "Bad or incomplete autoconfig: {}", r,);
        free(xml_raw as *mut libc::c_void);
+        free(moz_ac.in_emaildomain as *mut libc::c_void);
+        free(moz_ac.in_emaillocalpart as *mut libc::c_void);
        return None;
    }

    free(xml_raw as *mut libc::c_void);
+    free(moz_ac.in_emaildomain as *mut libc::c_void);
+    free(moz_ac.in_emaillocalpart as *mut libc::c_void);
    Some(moz_ac.out)
 }

@@ -104,8 +115,8 @@ fn moz_autoconfigure_text_cb<B: std::io::BufRead>(
    let val = event.unescape_and_decode(reader).unwrap_or_default();

    let addr = &moz_ac.in_0.addr;
-    let email_local = moz_ac.in_emaillocalpart;
-    let email_domain = moz_ac.in_emaildomain;
+    let email_local = as_str(moz_ac.in_emaillocalpart);
+    let email_domain = as_str(moz_ac.in_emaildomain);

    let val = val
        .trim()
@@ -121,13 +132,13 @@ fn moz_autoconfigure_text_cb<B: std::io::BufRead>(
            13 => {
                let val_lower = val.to_lowercase();
                if val_lower == "ssl" {
-                    moz_ac.out.server_flags |= DC_LP_IMAP_SOCKET_SSL as i32
+                    moz_ac.out.server_flags |= 0x200
                }
                if val_lower == "starttls" {
-                    moz_ac.out.server_flags |= DC_LP_IMAP_SOCKET_STARTTLS as i32
+                    moz_ac.out.server_flags |= 0x100
                }
                if val_lower == "plain" {
-                    moz_ac.out.server_flags |= DC_LP_IMAP_SOCKET_PLAIN as i32
+                    moz_ac.out.server_flags |= 0x400
                }
            }
            _ => {}
@@ -140,13 +151,13 @@ fn moz_autoconfigure_text_cb<B: std::io::BufRead>(
            13 => {
                let val_lower = val.to_lowercase();
                if val_lower == "ssl" {
-                    moz_ac.out.server_flags |= DC_LP_SMTP_SOCKET_SSL as i32
+                    moz_ac.out.server_flags |= 0x20000
                }
                if val_lower == "starttls" {
-                    moz_ac.out.server_flags |= DC_LP_SMTP_SOCKET_STARTTLS as i32
+                    moz_ac.out.server_flags |= 0x10000
                }
                if val_lower == "plain" {
-                    moz_ac.out.server_flags |= DC_LP_SMTP_SOCKET_PLAIN as i32
+                    moz_ac.out.server_flags |= 0x40000
                }
            }
            _ => {}
--- a/src/configure/auto_outlook.rs
+++ b/src/configure/auto_outlook.rs
@@ -1,10 +1,9 @@
 use quick_xml;
 use quick_xml::events::{BytesEnd, BytesStart, BytesText};

-use crate::constants::*;
 use crate::context::Context;
+use crate::dc_loginparam::*;
 use crate::dc_tools::*;
-use crate::login_param::LoginParam;
 use crate::x::*;
 use std::ptr;

@@ -14,8 +13,8 @@ use super::read_autoconf_file;
 ******************************************************************************/
 #[repr(C)]
 struct outlk_autodiscover_t<'a> {
-    pub in_0: &'a LoginParam,
-    pub out: LoginParam,
+    pub in_0: &'a dc_loginparam_t,
+    pub out: dc_loginparam_t,
    pub out_imap_set: libc::c_int,
    pub out_smtp_set: libc::c_int,
    pub tag_config: libc::c_int,
@@ -26,13 +25,13 @@ struct outlk_autodiscover_t<'a> {
 pub unsafe fn outlk_autodiscover(
    context: &Context,
    url__: &str,
-    param_in: &LoginParam,
-) -> Option<LoginParam> {
+    param_in: &dc_loginparam_t,
+) -> Option<dc_loginparam_t> {
    let mut xml_raw: *mut libc::c_char = ptr::null_mut();
    let mut url = url__.strdup();
    let mut outlk_ad = outlk_autodiscover_t {
        in_0: param_in,
-        out: LoginParam::new(),
+        out: dc_loginparam_new(),
        out_imap_set: 0,
        out_smtp_set: 0,
        tag_config: 0,
@@ -51,7 +50,7 @@ pub unsafe fn outlk_autodiscover(
            0,
            ::std::mem::size_of::<outlk_autodiscover_t>(),
        );
-        xml_raw = read_autoconf_file(context, as_str(url));
+        xml_raw = read_autoconf_file(context, url);
        if xml_raw.is_null() {
            ok_to_continue = false;
            break;
@@ -76,6 +75,7 @@ pub unsafe fn outlk_autodiscover(
                Err(e) => {
                    error!(
                        context,
+                        0,
                        "Configure xml: Error at position {}: {:?}",
                        reader.buffer_position(),
                        e
@@ -108,8 +108,8 @@ pub unsafe fn outlk_autodiscover(
            || outlk_ad.out.send_server.is_empty()
            || outlk_ad.out.send_port == 0
        {
-            let r = outlk_ad.out.to_string();
-            warn!(context, "Bad or incomplete autoconfig: {}", r,);
+            let r = dc_loginparam_get_readable(&outlk_ad.out);
+            warn!(context, 0, "Bad or incomplete autoconfig: {}", r,);
            free(url as *mut libc::c_void);
            free(xml_raw as *mut libc::c_void);
            outlk_clean_config(&mut outlk_ad);
@@ -168,9 +168,9 @@ unsafe fn outlk_autodiscover_endtag_cb(event: &BytesEnd, outlk_ad: &mut outlk_au
                outlk_ad.out.mail_server = to_string(outlk_ad.config[2]);
                outlk_ad.out.mail_port = port;
                if 0 != ssl_on {
-                    outlk_ad.out.server_flags |= DC_LP_IMAP_SOCKET_SSL as i32
+                    outlk_ad.out.server_flags |= 0x200
                } else if 0 != ssl_off {
-                    outlk_ad.out.server_flags |= DC_LP_IMAP_SOCKET_PLAIN as i32
+                    outlk_ad.out.server_flags |= 0x400
                }
                outlk_ad.out_imap_set = 1
            } else if strcasecmp(
@@ -182,9 +182,9 @@ unsafe fn outlk_autodiscover_endtag_cb(event: &BytesEnd, outlk_ad: &mut outlk_au
                outlk_ad.out.send_server = to_string(outlk_ad.config[2]);
                outlk_ad.out.send_port = port;
                if 0 != ssl_on {
-                    outlk_ad.out.server_flags |= DC_LP_SMTP_SOCKET_SSL as i32
+                    outlk_ad.out.server_flags |= 0x20000
                } else if 0 != ssl_off {
-                    outlk_ad.out.server_flags |= DC_LP_SMTP_SOCKET_PLAIN as i32
+                    outlk_ad.out.server_flags |= 0x40000
                }
                outlk_ad.out_smtp_set = 1
            }
--- a/src/configure/mod.rs
+++ b/src/configure/mod.rs
@@ -1,14 +1,16 @@
 use percent_encoding::{utf8_percent_encode, NON_ALPHANUMERIC};

-use crate::constants::*;
+use crate::constants::Event;
+use crate::constants::DC_CREATE_MVBOX;
 use crate::context::Context;
+use crate::dc_loginparam::*;
 use crate::dc_tools::*;
 use crate::e2ee;
 use crate::imap::*;
 use crate::job::*;
-use crate::login_param::LoginParam;
 use crate::oauth2::*;
 use crate::param::Params;
+use crate::types::*;

 mod auto_outlook;
 use auto_outlook::outlk_autodiscover;
@@ -18,17 +20,24 @@ use auto_mozilla::moz_autoconfigure;
 macro_rules! progress {
    ($context:tt, $progress:expr) => {
        assert!(
-            $progress > 0 && $progress <= 1000,
+            $progress >= 0 && $progress <= 1000,
            "value in range 0..1000 expected with: 0=error, 1..999=progress, 1000=success"
        );
-        $context.call_cb($crate::events::Event::ConfigureProgress($progress));
+        $context.call_cb(
+            Event::CONFIGURE_PROGRESS,
+            $progress as uintptr_t,
+            0 as uintptr_t,
+        );
    };
 }

 // connect
 pub unsafe fn configure(context: &Context) {
    if dc_has_ongoing(context) {
-        warn!(context, "There is already another ongoing process running.",);
+        warn!(
+            context,
+            0, "There is already another ongoing process running.",
+        );
        return;
    }
    job_kill_action(context, Action::ConfigureImap);
@@ -36,8 +45,17 @@ pub unsafe fn configure(context: &Context) {
 }

 /// Check if the context is already configured.
-pub fn dc_is_configured(context: &Context) -> bool {
-    context.sql.get_config_bool(context, "configured")
+pub fn dc_is_configured(context: &Context) -> libc::c_int {
+    if context
+        .sql
+        .get_config_int(context, "configured")
+        .unwrap_or_default()
+        > 0
+    {
+        1
+    } else {
+        0
+    }
 }

 /*******************************************************************************
@@ -51,11 +69,11 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
    let mut smtp_connected_here = false;
    let mut ongoing_allocated_here = false;

-    let mut param_autoconfig: Option<LoginParam> = None;
+    let mut param_autoconfig: Option<dc_loginparam_t> = None;
    if dc_alloc_ongoing(context) {
        ongoing_allocated_here = true;
        if !context.sql.is_open() {
-            error!(context, "Cannot configure, database not opened.",);
+            error!(context, 0, "Cannot configure, database not opened.",);
        } else {
            context.inbox.read().unwrap().disconnect(context);
            context
@@ -71,13 +89,13 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                .imap
                .disconnect(context);
            context.smtp.clone().lock().unwrap().disconnect();
-            info!(context, "Configure ...",);
+            info!(context, 0, "Configure ...",);

            let s_a = context.running_state.clone();
            let s = s_a.read().unwrap();

            // Variables that are shared between steps:
-            let mut param = LoginParam::from_database(context, "");
+            let mut param: dc_loginparam_t = dc_loginparam_read(context, &context.sql, "");
            // need all vars here to be mutable because rust thinks the same step could be called multiple times
            // and also initialize, because otherwise rust thinks it's used while unitilized, even if thats not the case as the loop goes only forward
            let mut param_domain = "undefined.undefined".to_owned();
@@ -95,7 +113,7 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                    1 => {
                        progress!(context, 1);
                        if param.addr.is_empty() {
-                            error!(context, "Please enter an email address.",);
+                            error!(context, 0, "Please enter an email address.",);
                        }
                        !param.addr.is_empty()
                    }
@@ -128,7 +146,7 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                                utf8_percent_encode(&param.addr, NON_ALPHANUMERIC).to_string();
                            true
                        } else {
-                            error!(context, "Bad email-address.");
+                            error!(context, 0, "Bad email-address.");
                            false
                        }
                    }
@@ -238,7 +256,8 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                    12 => {
                        progress!(context, 500);
                        if let Some(ref cfg) = param_autoconfig {
-                            info!(context, "Got autoconfig: {}", &cfg);
+                            let r = dc_loginparam_get_readable(cfg);
+                            info!(context, 0, "Got autoconfig: {}", r);
                            if !cfg.mail_user.is_empty() {
                                param.mail_user = cfg.mail_user.clone();
                            }
@@ -277,14 +296,13 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                            }
                        }
                        if param.send_port == 0 {
-                            param.send_port =
-                                if 0 != param.server_flags & DC_LP_SMTP_SOCKET_STARTTLS as i32 {
-                                    587
-                                } else if 0 != param.server_flags & DC_LP_SMTP_SOCKET_PLAIN as i32 {
-                                    25
-                                } else {
-                                    465
-                                }
+                            param.send_port = if 0 != param.server_flags & 0x10000 {
+                                587
+                            } else if 0 != param.server_flags & 0x40000 {
+                                25
+                            } else {
+                                465
+                            }
                        }
                        if param.send_user.is_empty() && !param.mail_user.is_empty() {
                            param.send_user = param.mail_user.clone();
@@ -292,30 +310,24 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                        if param.send_pw.is_empty() && !param.mail_pw.is_empty() {
                            param.send_pw = param.mail_pw.clone()
                        }
-                        if !dc_exactly_one_bit_set(param.server_flags & DC_LP_AUTH_FLAGS as i32) {
-                            param.server_flags &= !(DC_LP_AUTH_FLAGS as i32);
-                            param.server_flags |= DC_LP_AUTH_NORMAL as i32
+                        if !dc_exactly_one_bit_set(param.server_flags & (0x2 | 0x4)) {
+                            param.server_flags &= !(0x2 | 0x4);
+                            param.server_flags |= 0x4
+                        }
+                        if !dc_exactly_one_bit_set(param.server_flags & (0x100 | 0x200 | 0x400)) {
+                            param.server_flags &= !(0x100 | 0x200 | 0x400);
+                            param.server_flags |= if param.send_port == 143 { 0x100 } else { 0x200 }
                        }
                        if !dc_exactly_one_bit_set(
-                            param.server_flags & DC_LP_IMAP_SOCKET_FLAGS as i32,
+                            param.server_flags & (0x10000 | 0x20000 | 0x40000),
                        ) {
-                            param.server_flags &= !(DC_LP_IMAP_SOCKET_FLAGS as i32);
-                            param.server_flags |= if param.send_port == 143 {
-                                DC_LP_IMAP_SOCKET_STARTTLS as i32
-                            } else {
-                                DC_LP_IMAP_SOCKET_SSL as i32
-                            }
-                        }
-                        if !dc_exactly_one_bit_set(
-                            param.server_flags & (DC_LP_SMTP_SOCKET_FLAGS as i32),
-                        ) {
-                            param.server_flags &= !(DC_LP_SMTP_SOCKET_FLAGS as i32);
+                            param.server_flags &= !(0x10000 | 0x20000 | 0x40000);
                            param.server_flags |= if param.send_port == 587 {
-                                DC_LP_SMTP_SOCKET_STARTTLS as i32
+                                0x10000
                            } else if param.send_port == 25 {
-                                DC_LP_SMTP_SOCKET_PLAIN as i32
+                                0x40000
                            } else {
-                                DC_LP_SMTP_SOCKET_SSL as i32
+                                0x20000
                            }
                        }
                        /* do we have a complete configuration? */
@@ -329,7 +341,7 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                            || param.send_pw.is_empty()
                            || param.server_flags == 0
                        {
-                            error!(context, "Account settings incomplete.");
+                            error!(context, 0, "Account settings incomplete.");
                            false
                        } else {
                            true
@@ -346,7 +358,8 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                                ok_to_continue8 = true;
                                break;
                            }
-                            info!(context, "Trying: {}", &param);
+                            let r_0 = dc_loginparam_get_readable(&param);
+                            info!(context, 0, "Trying: {}", r_0,);

                            if context.inbox.read().unwrap().connect(context, &param) {
                                ok_to_continue8 = true;
@@ -364,7 +377,8 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                            progress!(context, 650 + username_variation * 30);
                            param.server_flags &= !(0x100 | 0x200 | 0x400);
                            param.server_flags |= 0x100;
-                            info!(context, "Trying: {}", &param);
+                            let r_1 = dc_loginparam_get_readable(&param);
+                            info!(context, 0, "Trying: {}", r_1,);

                            if context.inbox.read().unwrap().connect(context, &param) {
                                ok_to_continue8 = true;
@@ -377,7 +391,8 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                            }
                            progress!(context, 660 + username_variation * 30);
                            param.mail_port = 143;
-                            info!(context, "Trying: {}", &param);
+                            let r_2 = dc_loginparam_get_readable(&param);
+                            info!(context, 0, "Trying: {}", r_2,);

                            if context.inbox.read().unwrap().connect(context, &param) {
                                ok_to_continue8 = true;
@@ -429,10 +444,11 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                                success = false;
                            } else {
                                progress!(context, 850);
-                                param.server_flags &= !(DC_LP_SMTP_SOCKET_FLAGS as i32);
-                                param.server_flags |= DC_LP_SMTP_SOCKET_STARTTLS as i32;
+                                param.server_flags &= !(0x10000 | 0x20000 | 0x40000);
+                                param.server_flags |= 0x10000;
                                param.send_port = 587;
-                                info!(context, "Trying: {}", &param);
+                                let r_3 = dc_loginparam_get_readable(&param);
+                                info!(context, 0, "Trying: {}", r_3,);

                                if !context
                                    .smtp
@@ -445,10 +461,11 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                                        success = false;
                                    } else {
                                        progress!(context, 860);
-                                        param.server_flags &= !(DC_LP_SMTP_SOCKET_FLAGS as i32);
-                                        param.server_flags |= DC_LP_SMTP_SOCKET_STARTTLS as i32;
+                                        param.server_flags &= !(0x10000 | 0x20000 | 0x40000);
+                                        param.server_flags |= 0x10000;
                                        param.send_port = 25;
-                                        info!(context, "Trying: {}", &param);
+                                        let r_4 = dc_loginparam_get_readable(&param);
+                                        info!(context, 0, "Trying: {}", r_4);

                                        if !context
                                            .smtp
@@ -500,14 +517,13 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                    17 => {
                        progress!(context, 910);
                        /* configuration success - write back the configured parameters with the "configured_" prefix; also write the "configured"-flag */
-                        param
-                            .save_to_database(
-                                context,
-                                "configured_", /*the trailing underscore is correct*/
-                            )
-                            .ok();
-
-                        context.sql.set_config_bool(context, "configured", true);
+                        dc_loginparam_write(
+                            context,
+                            &param,
+                            &context.sql,
+                            "configured_", /*the trailing underscore is correct*/
+                        );
+                        context.sql.set_config_int(context, "configured", 1).ok();
                        true
                    }
                    18 => {
@@ -517,13 +533,13 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
                        // (~30 seconds on a Moto G4 play) and might looks as if message sending is always that slow.
                        e2ee::ensure_secret_key_exists(context);
                        success = true;
-                        info!(context, "Configure completed.");
+                        info!(context, 0, "Configure completed.");
                        progress!(context, 940);
                        break; // We are done here
                    }

                    _ => {
-                        error!(context, "Internal error: step counter out of bound",);
+                        error!(context, 0, "Internal error: step counter out of bound",);
                        break;
                    }
                };
@@ -562,7 +578,7 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {
        dc_free_ongoing(context);
    }

-    progress!(context, if success { 1000 } else { 0 });
+    progress!(context, (if success { 1000 } else { 0 }));
 }

 /*******************************************************************************
@@ -571,7 +587,10 @@ pub unsafe fn dc_job_do_DC_JOB_CONFIGURE_IMAP(context: &Context, _job: &Job) {

 pub fn dc_alloc_ongoing(context: &Context) -> bool {
    if dc_has_ongoing(context) {
-        warn!(context, "There is already another ongoing process running.",);
+        warn!(
+            context,
+            0, "There is already another ongoing process running.",
+        );

        false
    } else {
@@ -614,9 +633,9 @@ pub fn dc_connect_to_configured_imap(context: &Context, imap: &Imap) -> libc::c_
        .unwrap_or_default()
        == 0
    {
-        warn!(context, "Not configured, cannot connect.",);
+        warn!(context, 0, "Not configured, cannot connect.",);
    } else {
-        let param = LoginParam::from_database(context, "configured_");
+        let param = dc_loginparam_read(context, &context.sql, "configured_");
        // the trailing underscore is correct

        if imap.connect(context, &param) {
@@ -637,24 +656,24 @@ pub fn dc_stop_ongoing_process(context: &Context) {
    let mut s = s_a.write().unwrap();

    if s.ongoing_running && !s.shall_stop_ongoing {
-        info!(context, "Signaling the ongoing process to stop ASAP.",);
+        info!(context, 0, "Signaling the ongoing process to stop ASAP.",);
        s.shall_stop_ongoing = true;
    } else {
-        info!(context, "No ongoing process to stop.",);
+        info!(context, 0, "No ongoing process to stop.",);
    };
 }

-pub fn read_autoconf_file(context: &Context, url: &str) -> *mut libc::c_char {
-    info!(context, "Testing {} ...", url);
+pub fn read_autoconf_file(context: &Context, url: *const libc::c_char) -> *mut libc::c_char {
+    info!(context, 0, "Testing {} ...", to_string(url));

    match reqwest::Client::new()
-        .get(url)
+        .get(as_str(url))
        .send()
        .and_then(|mut res| res.text())
    {
        Ok(res) => unsafe { res.strdup() },
        Err(_err) => {
-            info!(context, "Can\'t read file.",);
+            info!(context, 0, "Can\'t read file.",);

            std::ptr::null_mut()
        }
--- a/src/constants.rs
+++ b/src/constants.rs
@@ -1,9 +1,10 @@
 //! Constants
 #![allow(non_camel_case_types, dead_code)]

-use deltachat_derive::*;
 use lazy_static::lazy_static;

+use deltachat_derive::*;
+
 lazy_static! {
    pub static ref DC_VERSION_STR: String = env!("CARGO_PKG_VERSION").to_string();
 }
@@ -17,12 +18,6 @@ pub enum MoveState {
    Moving = 3,
 }

-impl Default for MoveState {
-    fn default() -> Self {
-        MoveState::Undefined
-    }
-}
-
 // some defaults
 const DC_E2EE_DEFAULT_ENABLED: i32 = 1;
 pub const DC_MDNS_DEFAULT_ENABLED: i32 = 1;
@@ -76,7 +71,7 @@ pub const DC_CHAT_ID_TRASH: u32 = 3;
 /// a message is just in creation but not yet assigned to a chat (eg. we may need the message ID to set up blobs; this avoids unready message to be sent and shown)
 const DC_CHAT_ID_MSGS_IN_CREATION: u32 = 4;
 /// virtual chat showing all messages flagged with msgs.starred=2
-pub const DC_CHAT_ID_STARRED: u32 = 5;
+const DC_CHAT_ID_STARRED: u32 = 5;
 /// only an indicator in a chatlist
 pub const DC_CHAT_ID_ARCHIVED_LINK: u32 = 6;
 /// only an indicator in a chatlist
@@ -139,7 +134,7 @@ pub const DC_LP_AUTH_OAUTH2: usize = 0x2;

 /// Force NORMAL authorization, this is the default.
 /// If this flag is set, automatic configuration is skipped.
-pub const DC_LP_AUTH_NORMAL: usize = 0x4;
+const DC_LP_AUTH_NORMAL: usize = 0x4;

 /// Connect to IMAP via STARTTLS.
 /// If this flag is set, automatic configuration is skipped.
@@ -147,7 +142,7 @@ pub const DC_LP_IMAP_SOCKET_STARTTLS: usize = 0x100;

 /// Connect to IMAP via SSL.
 /// If this flag is set, automatic configuration is skipped.
-pub const DC_LP_IMAP_SOCKET_SSL: usize = 0x200;
+const DC_LP_IMAP_SOCKET_SSL: usize = 0x200;

 /// Connect to IMAP unencrypted, this should not be used.
 /// If this flag is set, automatic configuration is skipped.
@@ -159,19 +154,19 @@ pub const DC_LP_SMTP_SOCKET_STARTTLS: usize = 0x10000;

 /// Connect to SMTP via SSL.
 /// If this flag is set, automatic configuration is skipped.
-pub const DC_LP_SMTP_SOCKET_SSL: usize = 0x20000;
+const DC_LP_SMTP_SOCKET_SSL: usize = 0x20000;

 /// Connect to SMTP unencrypted, this should not be used.
 /// If this flag is set, automatic configuration is skipped.
 pub const DC_LP_SMTP_SOCKET_PLAIN: usize = 0x40000;

 /// if none of these flags are set, the default is chosen
-pub const DC_LP_AUTH_FLAGS: usize = (DC_LP_AUTH_OAUTH2 | DC_LP_AUTH_NORMAL);
+const DC_LP_AUTH_FLAGS: usize = (DC_LP_AUTH_OAUTH2 | DC_LP_AUTH_NORMAL);
 /// if none of these flags are set, the default is chosen
-pub const DC_LP_IMAP_SOCKET_FLAGS: usize =
+const DC_LP_IMAP_SOCKET_FLAGS: usize =
    (DC_LP_IMAP_SOCKET_STARTTLS | DC_LP_IMAP_SOCKET_SSL | DC_LP_IMAP_SOCKET_PLAIN);
 /// if none of these flags are set, the default is chosen
-pub const DC_LP_SMTP_SOCKET_FLAGS: usize =
+const DC_LP_SMTP_SOCKET_FLAGS: usize =
    (DC_LP_SMTP_SOCKET_STARTTLS | DC_LP_SMTP_SOCKET_SSL | DC_LP_SMTP_SOCKET_PLAIN);

 // QR code scanning (view from Bob, the joiner)
@@ -225,12 +220,6 @@ pub enum Viewtype {
    File = 60,
 }

-impl Default for Viewtype {
-    fn default() -> Self {
-        Viewtype::Unknown
-    }
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -246,6 +235,242 @@ mod tests {
 // If you do not want to handle an event, it is always safe to return 0,
 // so there is no need to add a "case" for every event.

+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive)]
+#[repr(u32)]
+pub enum Event {
+    /// The library-user may write an informational string to the log.
+    /// Passed to the callback given to dc_context_new().
+    /// This event should not be reported to the end-user using a popup or something like that.
+    /// @param data1 0
+    /// @param data2 (const char*) Info string in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    INFO = 100,
+
+    /// Emitted when SMTP connection is established and login was successful.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Info string in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    SMTP_CONNECTED = 101,
+
+    /// Emitted when IMAP connection is established and login was successful.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Info string in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    IMAP_CONNECTED = 102,
+
+    /// Emitted when a message was successfully sent to the SMTP server.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Info string in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    SMTP_MESSAGE_SENT = 103,
+
+    /// The library-user should write a warning string to the log.
+    /// Passed to the callback given to dc_context_new().
+    ///
+    /// This event should not be reported to the end-user using a popup or something like that.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Warning string in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    WARNING = 300,
+
+    /// The library-user should report an error to the end-user.
+    /// Passed to the callback given to dc_context_new().
+    ///
+    /// As most things are asynchronous, things may go wrong at any time and the user
+    /// should not be disturbed by a dialog or so.  Instead, use a bubble or so.
+    ///
+    /// However, for ongoing processes (eg. configure())
+    /// or for functions that are expected to fail (eg. dc_continue_key_transfer())
+    /// it might be better to delay showing these events until the function has really
+    /// failed (returned false). It should be sufficient to report only the _last_ error
+    /// in a messasge box then.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Error string, always set, never NULL. Frequent error strings are
+    ///     localized using #DC_EVENT_GET_STRING, however, most error strings will be in english language.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    ERROR = 400,
+
+    /// An action cannot be performed because there is no network available.
+    ///
+    /// The library will typically try over after a some time
+    /// and when dc_maybe_network() is called.
+    ///
+    /// Network errors should be reported to users in a non-disturbing way,
+    /// however, as network errors may come in a sequence,
+    /// it is not useful to raise each an every error to the user.
+    /// For this purpose, data1 is set to 1 if the error is probably worth reporting.
+    ///
+    /// Moreover, if the UI detects that the device is offline,
+    /// it is probably more useful to report this to the user
+    /// instead of the string from data2.
+    ///
+    /// @param data1 (int) 1=first/new network error, should be reported the user;
+    ///     0=subsequent network error, should be logged only
+    /// @param data2 (const char*) Error string, always set, never NULL.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @return 0
+    ERROR_NETWORK = 401,
+
+    /// An action cannot be performed because the user is not in the group.
+    /// Reported eg. after a call to
+    /// dc_set_chat_name(), dc_set_chat_profile_image(),
+    /// dc_add_contact_to_chat(), dc_remove_contact_from_chat(),
+    /// dc_send_text_msg() or another sending function.
+    ///
+    /// @param data1 0
+    /// @param data2 (const char*) Info string in english language.
+    ///     Must not be free()'d or modified
+    ///     and is valid only until the callback returns.
+    /// @return 0
+    ERROR_SELF_NOT_IN_GROUP = 410,
+
+    /// Messages or chats changed.  One or more messages or chats changed for various
+    /// reasons in the database:
+    /// - Messages sent, received or removed
+    /// - Chats created, deleted or archived
+    /// - A draft has been set
+    ///
+    /// @param data1 (int) chat_id for single added messages
+    /// @param data2 (int) msg_id for single added messages
+    /// @return 0
+    MSGS_CHANGED = 2000,
+
+    /// There is a fresh message. Typically, the user will show an notification
+    /// when receiving this message.
+    ///
+    /// There is no extra #DC_EVENT_MSGS_CHANGED event send together with this event.
+    ///
+    /// @param data1 (int) chat_id
+    /// @param data2 (int) msg_id
+    /// @return 0
+    INCOMING_MSG = 2005,
+
+    /// A single message is sent successfully. State changed from  DC_STATE_OUT_PENDING to
+    /// DC_STATE_OUT_DELIVERED, see dc_msg_get_state().
+    ///
+    /// @param data1 (int) chat_id
+    /// @param data2 (int) msg_id
+    /// @return 0
+    MSG_DELIVERED = 2010,
+
+    /// A single message could not be sent. State changed from DC_STATE_OUT_PENDING or DC_STATE_OUT_DELIVERED to
+    /// DC_STATE_OUT_FAILED, see dc_msg_get_state().
+    ///
+    /// @param data1 (int) chat_id
+    /// @param data2 (int) msg_id
+    /// @return 0
+    MSG_FAILED = 2012,
+
+    /// A single message is read by the receiver. State changed from DC_STATE_OUT_DELIVERED to
+    /// DC_STATE_OUT_MDN_RCVD, see dc_msg_get_state().
+    ///
+    /// @param data1 (int) chat_id
+    /// @param data2 (int) msg_id
+    /// @return 0
+    MSG_READ = 2015,
+
+    /// Chat changed.  The name or the image of a chat group was changed or members were added or removed.
+    /// Or the verify state of a chat has changed.
+    /// See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()
+    /// and dc_remove_contact_from_chat().
+    ///
+    /// @param data1 (int) chat_id
+    /// @param data2 0
+    /// @return 0
+    CHAT_MODIFIED = 2020,
+
+    /// Contact(s) created, renamed, blocked or deleted.
+    ///
+    /// @param data1 (int) If not 0, this is the contact_id of an added contact that should be selected.
+    /// @param data2 0
+    /// @return 0
+    CONTACTS_CHANGED = 2030,
+
+    /// Location of one or more contact has changed.
+    ///
+    /// @param data1 (int) contact_id of the contact for which the location has changed.
+    ///     If the locations of several contacts have been changed,
+    ///     eg. after calling dc_delete_all_locations(), this parameter is set to 0.
+    /// @param data2 0
+    /// @return 0
+    LOCATION_CHANGED = 2035,
+
+    /// Inform about the configuration progress started by configure().
+    ///
+    /// @param data1 (int) 0=error, 1-999=progress in permille, 1000=success and done
+    /// @param data2 0
+    /// @return 0
+    CONFIGURE_PROGRESS = 2041,
+
+    /// Inform about the import/export progress started by dc_imex().
+    ///
+    /// @param data1 (int) 0=error, 1-999=progress in permille, 1000=success and done
+    /// @param data2 0
+    /// @return 0
+    IMEX_PROGRESS = 2051,
+
+    /// A file has been exported. A file has been written by dc_imex().
+    /// This event may be sent multiple times by a single call to dc_imex().
+    ///
+    /// A typical purpose for a handler of this event may be to make the file public to some system
+    /// services.
+    ///
+    /// @param data1 (const char*) Path and file name.
+    ///     Must not be free()'d or modified and is valid only until the callback returns.
+    /// @param data2 0
+    /// @return 0
+    IMEX_FILE_WRITTEN = 2052,
+
+    /// Progress information of a secure-join handshake from the view of the inviter
+    /// (Alice, the person who shows the QR code).
+    ///
+    /// These events are typically sent after a joiner has scanned the QR code
+    /// generated by dc_get_securejoin_qr().
+    ///
+    /// @param data1 (int) ID of the contact that wants to join.
+    /// @param data2 (int) Progress as:
+    ///     300=vg-/vc-request received, typically shown as "bob@addr joins".
+    ///     600=vg-/vc-request-with-auth received, vg-member-added/vc-contact-confirm sent, typically shown as "bob@addr verified".
+    ///     800=vg-member-added-received received, shown as "bob@addr securely joined GROUP", only sent for the verified-group-protocol.
+    ///     1000=Protocol finished for this contact.
+    /// @return 0
+    SECUREJOIN_INVITER_PROGRESS = 2060,
+
+    /// Progress information of a secure-join handshake from the view of the joiner
+    /// (Bob, the person who scans the QR code).
+    /// The events are typically sent while dc_join_securejoin(), which
+    /// may take some time, is executed.
+    /// @param data1 (int) ID of the inviting contact.
+    /// @param data2 (int) Progress as:
+    ///     400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
+    ///     (Bob has verified alice and waits until Alice does the same for him)
+    /// @return 0
+    SECUREJOIN_JOINER_PROGRESS = 2061,
+
+    // the following events are functions that should be provided by the frontends
+    /// Requeste a localized string from the frontend.
+    /// @param data1 (int) ID of the string to request, one of the DC_STR_/// constants.
+    /// @param data2 (int) The count. If the requested string contains a placeholder for a numeric value,
+    ///     the ui may use this value to return different strings on different plural forms.
+    /// @return (const char*) Null-terminated UTF-8 string.
+    ///     The string will be free()'d by the core,
+    ///     so it must be allocated using malloc() or a compatible function.
+    ///     Return 0 if the ui cannot provide the requested string
+    ///     the core will use a default string in english language then.
+    GET_STRING = 2091,
+}
+
 const DC_EVENT_FILE_COPIED: usize = 2055; // deprecated;
 const DC_EVENT_IS_OFFLINE: usize = 2081; // deprecated;
 const DC_ERROR_SEE_STRING: usize = 0; // deprecated;
@@ -314,3 +539,12 @@ pub enum KeyType {
    Public = 0,
    Private = 1,
 }
+
+pub const DC_CMD_GROUPNAME_CHANGED: libc::c_int = 2;
+pub const DC_CMD_GROUPIMAGE_CHANGED: libc::c_int = 3;
+pub const DC_CMD_MEMBER_ADDED_TO_GROUP: libc::c_int = 4;
+pub const DC_CMD_MEMBER_REMOVED_FROM_GROUP: libc::c_int = 5;
+pub const DC_CMD_AUTOCRYPT_SETUP_MESSAGE: libc::c_int = 6;
+const DC_CMD_SECUREJOIN_MESSAGE: libc::c_int = 7;
+pub const DC_CMD_LOCATION_STREAMING_ENABLED: libc::c_int = 8;
+const DC_CMD_LOCATION_ONLY: libc::c_int = 9;
--- a/src/contact.rs
+++ b/src/contact.rs
@@ -1,23 +1,22 @@
-use std::path::PathBuf;
-
-use deltachat_derive::*;
 use itertools::Itertools;
+use num_traits::{FromPrimitive, ToPrimitive};
 use rusqlite;
+use rusqlite::types::*;

 use crate::aheader::EncryptPreference;
 use crate::config::Config;
 use crate::constants::*;
 use crate::context::Context;
+use crate::dc_loginparam::*;
 use crate::dc_tools::*;
 use crate::e2ee;
 use crate::error::Result;
-use crate::events::Event;
 use crate::key::*;
-use crate::login_param::LoginParam;
 use crate::message::MessageState;
 use crate::peerstate::*;
 use crate::sql;
 use crate::stock::StockMessage;
+use crate::types::*;

 /// Contacts with at least this origin value are shown in the contact list.
 const DC_ORIGIN_MIN_CONTACT_LIST: i32 = 0x100;
@@ -32,8 +31,8 @@ const DC_ORIGIN_MIN_CONTACT_LIST: i32 = 0x100;
 /// For this purpose, internally, two names are tracked -
 /// authorized-name and given-name.
 /// By default, these names are equal, but functions working with contact names
-#[derive(Debug)]
-pub struct Contact {
+pub struct Contact<'a> {
+    context: &'a Context,
    /// The contact ID.
    ///
    /// Special message IDs:
@@ -59,9 +58,7 @@ pub struct Contact {
 }

 /// Possible origins of a contact.
-#[derive(
-    Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, FromPrimitive, ToPrimitive, FromSql, ToSql,
-)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, FromPrimitive, ToPrimitive)]
 #[repr(i32)]
 pub enum Origin {
    Unknown = 0,
@@ -99,9 +96,20 @@ pub enum Origin {
    ManuallyCreated = 0x4000000,
 }

-impl Default for Origin {
-    fn default() -> Self {
-        Origin::Unknown
+impl ToSql for Origin {
+    fn to_sql(&self) -> rusqlite::Result<ToSqlOutput> {
+        let num: i64 = self
+            .to_i64()
+            .expect("impossible: Origin -> i64 conversion failed");
+
+        Ok(ToSqlOutput::Owned(Value::Integer(num)))
+    }
+}
+
+impl FromSql for Origin {
+    fn column_result(col: ValueRef) -> FromSqlResult<Self> {
+        let inner = FromSql::column_result(col)?;
+        FromPrimitive::from_i64(inner).ok_or(FromSqlError::InvalidType)
    }
 }

@@ -140,10 +148,11 @@ pub enum VerifiedStatus {
    BidirectVerified = 2,
 }

-impl Contact {
-    pub fn load_from_db(context: &Context, contact_id: u32) -> Result<Self> {
+impl<'a> Contact<'a> {
+    pub fn load_from_db(context: &'a Context, contact_id: u32) -> Result<Self> {
        if contact_id == DC_CONTACT_ID_SELF {
            let contact = Contact {
+                context,
                id: contact_id,
                name: context.stock_str(StockMessage::SelfMsg).into(),
                authname: "".into(),
@@ -162,6 +171,7 @@ impl Contact {
            params![contact_id as i32],
            |row| {
                let contact = Self {
+                    context,
                    id: contact_id,
                    name: row.get::<_, String>(0)?,
                    authname: row.get::<_, String>(4)?,
@@ -180,7 +190,7 @@ impl Contact {
    }

    /// Check if a contact is blocked.
-    pub fn is_blocked_load(context: &Context, id: u32) -> bool {
+    pub fn is_blocked_load(context: &'a Context, id: u32) -> bool {
        Self::load_from_db(context, id)
            .map(|contact| contact.blocked)
            .unwrap_or_default()
@@ -214,13 +224,15 @@ impl Contact {
        let (contact_id, sth_modified) =
            Contact::add_or_lookup(context, name, addr, Origin::ManuallyCreated)?;
        let blocked = Contact::is_blocked_load(context, contact_id);
-        context.call_cb(Event::ContactsChanged(
-            if sth_modified == Modifier::Created {
-                Some(contact_id)
+        context.call_cb(
+            Event::CONTACTS_CHANGED,
+            (if sth_modified == Modifier::Created {
+                contact_id
            } else {
-                None
-            },
-        ));
+                0
+            }) as uintptr_t,
+            0 as uintptr_t,
+        );
        if blocked {
            Contact::unblock(context, contact_id);
        }
@@ -241,10 +253,7 @@ impl Contact {
        )
        .is_ok()
        {
-            context.call_cb(Event::MsgsChanged {
-                chat_id: 0,
-                msg_id: 0,
-            });
+            context.call_cb(Event::MSGS_CHANGED, 0, 0);
        }
    }

@@ -267,7 +276,7 @@ impl Contact {
            return 1;
        }

-        context.sql.query_get_value(
+        context.sql.query_row_col(
            context,
            "SELECT id FROM contacts WHERE addr=?1 COLLATE NOCASE AND id>?2 AND origin>=?3 AND blocked=0;",
            params![
@@ -275,6 +284,7 @@ impl Contact {
                DC_CONTACT_ID_LAST_SPECIAL as i32,
                DC_ORIGIN_MIN_CONTACT_LIST,
            ],
+            0
        ).unwrap_or_default()
    }

@@ -307,6 +317,7 @@ impl Contact {
        if !may_be_valid_addr(&addr) {
            warn!(
                context,
+                0,
                "Bad address \"{}\" for contact \"{}\".",
                addr,
                if !name.as_ref().is_empty() {
@@ -330,22 +341,19 @@ impl Contact {
                let row_id = row.get(0)?;
                let row_name: String = row.get(1)?;
                let row_addr: String = row.get(2)?;
-                let row_origin: Origin = row.get(3)?;
+                let row_origin = row.get(3)?;
                let row_authname: String = row.get(4)?;

-                if !name.as_ref().is_empty() {
-                    if !row_name.is_empty() {
-                        if origin >= row_origin && name.as_ref() != row_name {
-                            update_name = true;
-                        }
-                    } else {
+                if !name.as_ref().is_empty() && !row_name.is_empty() {
+                    if origin >= row_origin && name.as_ref() != row_name {
                        update_name = true;
                    }
-                    if origin == Origin::IncomingUnknownFrom && name.as_ref() != row_authname {
-                        update_authname = true;
-                    }
+                } else {
+                    update_name = true;
+                }
+                if origin == Origin::IncomingUnknownFrom && name.as_ref() != row_authname {
+                    update_authname = true;
                }
-
                Ok((row_id, row_name, row_addr, row_origin, row_authname))
            },
        ) {
@@ -385,7 +393,7 @@ impl Contact {
                    context,
                    &context.sql,
                    "UPDATE chats SET name=? WHERE type=? AND id IN(SELECT chat_id FROM chats_contacts WHERE contact_id=?);",
-                    params![name.as_ref(), Chattype::Single, row_id]
+                    params![name.as_ref(), 100, row_id]
                ).ok();
                }
                sth_modified = Modifier::Modified;
@@ -402,7 +410,7 @@ impl Contact {
                row_id = sql::get_rowid(context, &context.sql, "contacts", "addr", addr);
                sth_modified = Modifier::Created;
            } else {
-                error!(context, "Cannot add contact.");
+                error!(context, 0, "Cannot add contact.");
            }
        }

@@ -423,13 +431,19 @@ impl Contact {
    /// To add a single contact entered by the user, you should prefer `Contact::create`,
    /// however, for adding a bunch of addresses, this function is _much_ faster.
    ///
-    /// The `addr_book` is a multiline string in the format `Name one\nAddress one\nName two\nAddress two`.
+    /// The `adr_book` is a multiline string in the format `Name one\nAddress one\nName two\nAddress two`.
    ///
    /// Returns the number of modified contacts.
-    pub fn add_address_book(context: &Context, addr_book: impl AsRef<str>) -> Result<usize> {
+    pub fn add_address_book(context: &Context, adr_book: impl AsRef<str>) -> Result<usize> {
        let mut modify_cnt = 0;

-        for (name, addr) in split_address_book(addr_book.as_ref()).into_iter() {
+        for chunk in &adr_book.as_ref().lines().chunks(2) {
+            let chunk = chunk.collect::<Vec<_>>();
+            if chunk.len() < 2 {
+                break;
+            }
+            let name = chunk[0];
+            let addr = chunk[1];
            let name = normalize_name(name);
            let (_, modified) = Contact::add_or_lookup(context, name, addr, Origin::AdressBook)?;
            if modified != Modifier::None {
@@ -437,7 +451,7 @@ impl Contact {
            }
        }
        if modify_cnt > 0 {
-            context.call_cb(Event::ContactsChanged(None));
+            context.call_cb(Event::CONTACTS_CHANGED, 0 as uintptr_t, 0 as uintptr_t);
        }

        Ok(modify_cnt)
@@ -540,10 +554,11 @@ impl Contact {
    pub fn get_blocked_cnt(context: &Context) -> usize {
        context
            .sql
-            .query_get_value::<_, isize>(
+            .query_row_col::<_, isize>(
                context,
                "SELECT COUNT(*) FROM contacts WHERE id>? AND blocked!=0",
                params![DC_CONTACT_ID_LAST_SPECIAL as i32],
+                0,
            )
            .unwrap_or_default() as usize
    }
@@ -574,7 +589,7 @@ impl Contact {

        if let Ok(contact) = Contact::load_from_db(context, contact_id) {
            let peerstate = Peerstate::from_addr(context, &context.sql, &contact.addr);
-            let loginparam = LoginParam::from_database(context, "configured_");
+            let loginparam = dc_loginparam_read(context, &context.sql, "configured_");

            let mut self_key = Key::from_self_public(context, &loginparam.addr, &context.sql);

@@ -646,20 +661,22 @@ impl Contact {

        let count_contacts: i32 = context
            .sql
-            .query_get_value(
+            .query_row_col(
                context,
                "SELECT COUNT(*) FROM chats_contacts WHERE contact_id=?;",
                params![contact_id as i32],
+                0,
            )
            .unwrap_or_default();

        let count_msgs: i32 = if count_contacts > 0 {
            context
                .sql
-                .query_get_value(
+                .query_row_col(
                    context,
                    "SELECT COUNT(*) FROM msgs WHERE from_id=? OR to_id=?;",
                    params![contact_id as i32, contact_id as i32],
+                    0,
                )
                .unwrap_or_default()
        } else {
@@ -674,11 +691,11 @@ impl Contact {
                params![contact_id as i32],
            ) {
                Ok(_) => {
-                    context.call_cb(Event::ContactsChanged(None));
+                    context.call_cb(Event::CONTACTS_CHANGED, 0, 0);
                    return Ok(());
                }
                Err(err) => {
-                    error!(context, "delete_contact {} failed ({})", contact_id, err);
+                    error!(context, 0, "delete_contact {} failed ({})", contact_id, err);
                    return Err(err);
                }
            }
@@ -686,7 +703,7 @@ impl Contact {

        info!(
            context,
-            "could not delete contact {}, there are {} messages with it", contact_id, count_msgs
+            0, "could not delete contact {}, there are {} messages with it", contact_id, count_msgs
        );
        bail!("Could not delete contact with messages in it");
    }
@@ -762,11 +779,9 @@ impl Contact {
    /// Get the contact's profile image.
    /// This is the image set by each remote user on their own
    /// using dc_set_config(context, "selfavatar", image).
-    pub fn get_profile_image(&self, context: &Context) -> Option<PathBuf> {
+    pub fn get_profile_image(&self) -> Option<String> {
        if self.id == DC_CONTACT_ID_SELF {
-            if let Some(p) = context.get_config(Config::Selfavatar) {
-                return Some(PathBuf::from(p));
-            }
+            return self.context.get_config(Config::Selfavatar);
        }
        // TODO: else get image_abs from contact param
        None
@@ -785,18 +800,14 @@ impl Contact {
    ///
    /// The UI may draw a checkbox or something like that beside verified contacts.
    ///
-    pub fn is_verified(&self, context: &Context) -> VerifiedStatus {
-        self.is_verified_ex(context, None)
+    pub fn is_verified(&self) -> VerifiedStatus {
+        self.is_verified_ex(None)
    }

    /// Same as `Contact::is_verified` but allows speeding up things
    /// by adding the peerstate belonging to the contact.
    /// If you do not have the peerstate available, it is loaded automatically.
-    pub fn is_verified_ex(
-        &self,
-        context: &Context,
-        peerstate: Option<&Peerstate>,
-    ) -> VerifiedStatus {
+    pub fn is_verified_ex(&self, peerstate: Option<&Peerstate<'a>>) -> VerifiedStatus {
        // We're always sort of secured-verified as we could verify the key on this device any time with the key
        // on this device
        if self.id == DC_CONTACT_ID_SELF {
@@ -809,7 +820,7 @@ impl Contact {
            }
        }

-        let peerstate = Peerstate::from_addr(context, &context.sql, &self.addr);
+        let peerstate = Peerstate::from_addr(self.context, &self.context.sql, &self.addr);
        if let Some(ps) = peerstate {
            if ps.verified_key().is_some() {
                return VerifiedStatus::BidirectVerified;
@@ -843,10 +854,11 @@ impl Contact {

        context
            .sql
-            .query_get_value::<_, isize>(
+            .query_row_col::<_, isize>(
                context,
                "SELECT COUNT(*) FROM contacts WHERE id>?;",
                params![DC_CONTACT_ID_LAST_SPECIAL as i32],
+                0,
            )
            .unwrap_or_default() as usize
    }
@@ -939,7 +951,11 @@ fn set_block_contact(context: &Context, contact_id: u32, new_blocking: bool) {
                    params![new_blocking, 100, contact_id as i32],
                ).is_ok() {
                    Contact::mark_noticed(context, contact_id);
-                    context.call_cb(Event::ContactsChanged(None));
+                    context.call_cb(
+                        Event::CONTACTS_CHANGED,
+                        0,
+                        0,
+                    );
                }
            }
        }
@@ -1027,21 +1043,6 @@ pub fn addr_equals_self(context: &Context, addr: impl AsRef<str>) -> bool {
    false
 }

-fn split_address_book(book: &str) -> Vec<(&str, &str)> {
-    book.lines()
-        .chunks(2)
-        .into_iter()
-        .filter_map(|mut chunk| {
-            let name = chunk.next().unwrap();
-            let addr = match chunk.next() {
-                Some(a) => a,
-                None => return None,
-            };
-            Some((name, addr))
-        })
-        .collect()
-}
-
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -1077,14 +1078,4 @@ mod tests {
    fn test_get_first_name() {
        assert_eq!(get_first_name("John Doe"), "John");
    }
-
-    #[test]
-    fn test_split_address_book() {
-        let book = "Name one\nAddress one\nName two\nAddress two\nrest name";
-        let list = split_address_book(&book);
-        assert_eq!(
-            list,
-            vec![("Name one", "Address one"), ("Name two", "Address two")]
-        )
-    }
 }
--- a/src/context.rs
+++ b/src/context.rs
--- a/src/dc_array.rs
+++ b/src/dc_array.rs
@@ -1,7 +1,8 @@
 use crate::location::Location;
+use crate::types::*;

 /* * the structure behind dc_array_t */
-#[derive(Debug, Clone)]
+#[derive(Clone)]
 #[allow(non_camel_case_types)]
 pub enum dc_array_t {
    Locations(Vec<Location>),
@@ -18,7 +19,7 @@ impl dc_array_t {
        dc_array_t::Locations(Vec::with_capacity(capacity))
    }

-    pub fn add_id(&mut self, item: u32) {
+    pub fn add_id(&mut self, item: uint32_t) {
        if let Self::Uint(array) = self {
            array.push(item);
        } else {
@@ -34,10 +35,10 @@ impl dc_array_t {
        }
    }

-    pub fn get_id(&self, index: usize) -> u32 {
+    pub fn get_id(&self, index: usize) -> uint32_t {
        match self {
            Self::Locations(array) => array[index].location_id,
-            Self::Uint(array) => array[index] as u32,
+            Self::Uint(array) => array[index] as uint32_t,
        }
    }

--- a/src/dc_imex.rs
+++ b/src/dc_imex.rs
@@ -1,5 +1,4 @@
 use std::ffi::CString;
-use std::path::Path;
 use std::ptr;

 use mmime::mailmime_content::*;
@@ -15,7 +14,6 @@ use crate::context::Context;
 use crate::dc_tools::*;
 use crate::e2ee;
 use crate::error::*;
-use crate::events::Event;
 use crate::job::*;
 use crate::key::*;
 use crate::message::*;
@@ -23,6 +21,7 @@ use crate::param::*;
 use crate::pgp::*;
 use crate::sql::{self, Sql};
 use crate::stock::StockMessage;
+use crate::types::*;
 use crate::x::*;

 // import/export and tools
@@ -30,16 +29,16 @@ use crate::x::*;
 // param1 is a directory where the keys are searched in and read from
 // param1 is a directory where the backup is written to
 // param1 is the file with the backup to import
-pub fn dc_imex(
+pub unsafe fn dc_imex(
    context: &Context,
    what: libc::c_int,
-    param1: Option<impl AsRef<Path>>,
+    param1: *const libc::c_char,
    param2: *const libc::c_char,
 ) {
    let mut param = Params::new();
    param.set_int(Param::Cmd, what as i32);
-    if let Some(param1) = param1 {
-        param.set(Param::Arg, param1.as_ref().to_string_lossy());
+    if !param1.is_null() {
+        param.set(Param::Arg, as_str(param1));
    }
    if !param2.is_null() {
        param.set(Param::Arg2, as_str(param2));
@@ -52,13 +51,14 @@ pub fn dc_imex(
 /// Returns the filename of the backup if found, nullptr otherwise.
 pub unsafe fn dc_imex_has_backup(
    context: &Context,
-    dir_name: impl AsRef<Path>,
+    dir_name: *const libc::c_char,
 ) -> *mut libc::c_char {
-    let dir_name = dir_name.as_ref();
+    let dir_name = as_path(dir_name);
    let dir_iter = std::fs::read_dir(dir_name);
    if dir_iter.is_err() {
        info!(
            context,
+            0,
            "Backup check: Cannot open directory \"{}\".\x00",
            dir_name.display(),
        );
@@ -92,7 +92,7 @@ pub unsafe fn dc_imex_has_backup(
        Some(path) => match path.to_c_string() {
            Ok(cstr) => dc_strdup(cstr.as_ptr()),
            Err(err) => {
-                error!(context, "Invalid backup filename: {}", err);
+                error!(context, 0, "Invalid backup filename: {}", err);
                std::ptr::null_mut()
            }
        },
@@ -139,7 +139,7 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
                    ))
                {
                    if let Ok(chat_id) = chat::create_by_contact_id(context, 1) {
-                        msg = dc_msg_new_untyped();
+                        msg = dc_msg_new_untyped(context);
                        msg.type_0 = Viewtype::File;
                        msg.param.set(Param::File, as_str(setup_file_name));

@@ -156,7 +156,7 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
                            .shall_stop_ongoing
                        {
                            if let Ok(msg_id) = chat::send_msg(context, chat_id, &mut msg) {
-                                info!(context, "Wait for setup message being sent ...",);
+                                info!(context, 0, "Wait for setup message being sent ...",);
                                loop {
                                    if context
                                        .running_state
@@ -169,8 +169,8 @@ pub unsafe fn dc_initiate_key_transfer(context: &Context) -> *mut libc::c_char {
                                    }
                                    std::thread::sleep(std::time::Duration::from_secs(1));
                                    if let Ok(msg) = dc_get_msg(context, msg_id) {
-                                        if dc_msg_is_sent(&msg) {
-                                            info!(context, "... setup message sent.",);
+                                        if 0 != dc_msg_is_sent(&msg) {
+                                            info!(context, 0, "... setup message sent.",);
                                            break;
                                        }
                                    }
@@ -208,8 +208,16 @@ pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<Strin
        _ => Some(("Autocrypt-Prefer-Encrypt", "mutual")),
    };
    let private_key_asc = private_key.to_asc(ac_headers);
-    let encr = dc_pgp_symm_encrypt(&passphrase, private_key_asc.as_bytes())
-        .ok_or(format_err!("Failed to encrypt private key."))?;
+    let encr = {
+        let private_key_asc_c = CString::yolo(private_key_asc);
+        let passphrase_c = CString::yolo(passphrase);
+        dc_pgp_symm_encrypt(
+            passphrase_c.as_ptr(),
+            private_key_asc_c.as_ptr() as *const libc::c_void,
+            private_key_asc_c.as_bytes().len(),
+        )
+        .ok_or(format_err!("Failed to encrypt private key."))?
+    };
    let replacement = format!(
        concat!(
            "-----BEGIN PGP MESSAGE-----\r\n",
@@ -242,7 +250,7 @@ pub fn dc_render_setup_file(context: &Context, passphrase: &str) -> Result<Strin
 }

 pub fn dc_create_setup_code(_context: &Context) -> String {
-    let mut random_val: u16;
+    let mut random_val: uint16_t;
    let mut rng = thread_rng();
    let mut ret = String::new();

@@ -253,7 +261,7 @@ pub fn dc_create_setup_code(_context: &Context) -> String {
                break;
            }
        }
-        random_val = (random_val as libc::c_int % 10000) as u16;
+        random_val = (random_val as libc::c_int % 10000) as uint16_t;
        ret += &format!(
            "{}{:04}",
            if 0 != i { "-" } else { "" },
@@ -264,54 +272,59 @@ pub fn dc_create_setup_code(_context: &Context) -> String {
    ret
 }

+// TODO should return bool /rtn
 pub unsafe fn dc_continue_key_transfer(
    context: &Context,
-    msg_id: u32,
+    msg_id: uint32_t,
    setup_code: *const libc::c_char,
-) -> bool {
-    let mut success = false;
+) -> libc::c_int {
+    let mut success: libc::c_int = 0i32;
+    let mut filename: *mut libc::c_char = ptr::null_mut();
+    let mut filecontent: *mut libc::c_char = ptr::null_mut();
+    let mut filebytes: size_t = 0i32 as size_t;
    let mut armored_key: *mut libc::c_char = ptr::null_mut();
-    let norm_sc;
-    if msg_id <= 9i32 as libc::c_uint || setup_code.is_null() {
-        return false;
-    }
-
-    let msg = dc_get_msg(context, msg_id);
-    if msg.is_err() {
-        error!(context, "Message is no Autocrypt Setup Message.");
-        return false;
-    }
-    let msg = msg.unwrap();
-    if !dc_msg_is_setupmessage(&msg) {
-        error!(context, "Message is no Autocrypt Setup Message.");
-        return false;
-    }
-
-    if let Some(filename) = dc_msg_get_file(context, &msg) {
-        if let Some(buf) = dc_read_file_safe(context, filename) {
+    let mut norm_sc: *mut libc::c_char = ptr::null_mut();
+    if !(msg_id <= 9i32 as libc::c_uint || setup_code.is_null()) {
+        let msg = dc_get_msg(context, msg_id);
+        if msg.is_err()
+            || !dc_msg_is_setupmessage(msg.as_ref().unwrap())
+            || {
+                filename = dc_msg_get_file(msg.as_ref().unwrap());
+                filename.is_null()
+            }
+            || *filename.offset(0isize) as libc::c_int == 0i32
+        {
+            error!(context, 0, "Message is no Autocrypt Setup Message.",);
+        } else if 0
+            == dc_read_file(
+                context,
+                filename,
+                &mut filecontent as *mut *mut libc::c_char as *mut *mut libc::c_void,
+                &mut filebytes,
+            )
+            || filecontent.is_null()
+            || filebytes <= 0
+        {
+            error!(context, 0, "Cannot read Autocrypt Setup Message file.",);
+        } else {
            norm_sc = dc_normalize_setup_code(context, setup_code);
            if norm_sc.is_null() {
-                warn!(context, "Cannot normalize Setup Code.",);
+                warn!(context, 0, "Cannot normalize Setup Code.",);
            } else {
-                armored_key = dc_decrypt_setup_file(context, norm_sc, buf.as_ptr().cast());
+                armored_key = dc_decrypt_setup_file(context, norm_sc, filecontent);
                if armored_key.is_null() {
-                    warn!(context, "Cannot decrypt Autocrypt Setup Message.",);
+                    warn!(context, 0, "Cannot decrypt Autocrypt Setup Message.",);
                } else if set_self_key(context, armored_key, 1) {
                    /*set default*/
                    /* error already logged */
-                    success = true
+                    success = 1i32
                }
            }
-        } else {
-            error!(context, "Cannot read Autocrypt Setup Message file.",);
-            return false;
        }
-    } else {
-        error!(context, "Message is no Autocrypt Setup Message.");
-        return false;
    }
-
    free(armored_key as *mut libc::c_void);
+    free(filecontent as *mut libc::c_void);
+    free(filename as *mut libc::c_void);
    free(norm_sc as *mut libc::c_void);

    success
@@ -330,7 +343,7 @@ fn set_self_key(
        .and_then(|(k, h)| k.split_key().map(|pub_key| (k, pub_key, h)));

    if keys.is_none() {
-        error!(context, "File does not contain a valid private key.",);
+        error!(context, 0, "File does not contain a valid private key.",);
        return false;
    }

@@ -360,13 +373,13 @@ fn set_self_key(
            return false;
        }
    } else {
-        error!(context, "File does not contain a private key.",);
+        error!(context, 0, "File does not contain a private key.",);
    }

-    let self_addr = context.get_config(Config::ConfiguredAddr);
+    let self_addr = context.sql.get_config(context, "configured_addr");

    if self_addr.is_none() {
-        error!(context, "Missing self addr");
+        error!(context, 0, "Missing self addr");
        return false;
    }

@@ -378,7 +391,7 @@ fn set_self_key(
        set_default,
        &context.sql,
    ) {
-        error!(context, "Cannot save keypair.");
+        error!(context, 0, "Cannot save keypair.");
        return false;
    }

@@ -405,8 +418,8 @@ pub unsafe fn dc_decrypt_setup_file(
    let mut fc_headerline: *const libc::c_char = ptr::null();
    let mut fc_base64: *const libc::c_char = ptr::null();
    let mut binary: *mut libc::c_char = ptr::null_mut();
-    let mut binary_bytes: libc::size_t = 0;
-    let mut indx: libc::size_t = 0;
+    let mut binary_bytes: size_t = 0i32 as size_t;
+    let mut indx: size_t = 0i32 as size_t;

    let mut payload: *mut libc::c_char = ptr::null_mut();
    fc_buf = dc_strdup(filecontent);
@@ -436,10 +449,9 @@ pub unsafe fn dc_decrypt_setup_file(
            || binary_bytes == 0)
        {
            /* decrypt symmetrically */
-            if let Some(plain) = dc_pgp_symm_decrypt(
-                as_str(passphrase),
-                std::slice::from_raw_parts(binary as *const u8, binary_bytes),
-            ) {
+            if let Some(plain) =
+                dc_pgp_symm_decrypt(passphrase, binary as *const libc::c_void, binary_bytes)
+            {
                let payload_c = CString::new(plain).unwrap();
                payload = strdup(payload_c.as_ptr());
            }
@@ -490,27 +502,28 @@ pub unsafe fn dc_normalize_setup_code(
 pub unsafe fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) {
    let mut ok_to_continue = true;
    let mut success: libc::c_int = 0;
+    let what: libc::c_int;

    if dc_alloc_ongoing(context) {
-        let what = job.param.get_int(Param::Cmd).unwrap_or_default();
+        what = job.param.get_int(Param::Cmd).unwrap_or_default();
        let param1_s = job.param.get(Param::Arg).unwrap_or_default();
        let param1 = CString::yolo(param1_s);
        let _param2 = CString::yolo(job.param.get(Param::Arg2).unwrap_or_default());

        if strlen(param1.as_ptr()) == 0 {
-            error!(context, "No Import/export dir/file given.",);
+            error!(context, 0, "No Import/export dir/file given.",);
        } else {
-            info!(context, "Import/export process started.",);
-            context.call_cb(Event::ImexProgress(10));
-
+            info!(context, 0, "Import/export process started.",);
+            context.call_cb(Event::IMEX_PROGRESS, 10 as uintptr_t, 0 as uintptr_t);
            if !context.sql.is_open() {
-                error!(context, "Import/export: Database not opened.",);
+                error!(context, 0, "Import/export: Database not opened.",);
            } else {
                if what == 1 || what == 11 {
                    /* before we export anything, make sure the private key exists */
                    if e2ee::ensure_secret_key_exists(context).is_err() {
                        error!(
                            context,
+                            0,
                            "Import/export: Cannot create private key or private key not available.",
                        );
                        ok_to_continue = false;
@@ -521,26 +534,26 @@ pub unsafe fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) {
                if ok_to_continue {
                    match what {
                        1 => {
-                            if export_self_keys(context, param1.as_ptr()) {
-                                info!(context, "Import/export completed.",);
+                            if 0 != export_self_keys(context, param1.as_ptr()) {
+                                info!(context, 0, "Import/export completed.",);
                                success = 1
                            }
                        }
                        2 => {
                            if 0 != import_self_keys(context, param1.as_ptr()) {
-                                info!(context, "Import/export completed.",);
+                                info!(context, 0, "Import/export completed.",);
                                success = 1
                            }
                        }
                        11 => {
-                            if export_backup(context, param1.as_ptr()) {
-                                info!(context, "Import/export completed.",);
+                            if 0 != export_backup(context, param1.as_ptr()) {
+                                info!(context, 0, "Import/export completed.",);
                                success = 1
                            }
                        }
                        12 => {
-                            if import_backup(context, param1.as_ptr()) {
-                                info!(context, "Import/export completed.",);
+                            if 0 != import_backup(context, param1.as_ptr()) {
+                                info!(context, 0, "Import/export completed.",);
                                success = 1
                            }
                        }
@@ -551,52 +564,68 @@ pub unsafe fn dc_job_do_DC_JOB_IMEX_IMAP(context: &Context, job: &Job) {
        }
        dc_free_ongoing(context);
    }
-    context.call_cb(Event::ImexProgress(if 0 != success { 1000 } else { 0 }));
+    context.call_cb(
+        Event::IMEX_PROGRESS,
+        (if 0 != success { 1000 } else { 0 }) as uintptr_t,
+        0 as uintptr_t,
+    );
 }

 /*******************************************************************************
 * Import backup
 ******************************************************************************/

+// TODO should return bool /rtn
 #[allow(non_snake_case)]
-unsafe fn import_backup(context: &Context, backup_to_import: *const libc::c_char) -> bool {
+unsafe fn import_backup(context: &Context, backup_to_import: *const libc::c_char) -> libc::c_int {
    info!(
        context,
+        0,
        "Import \"{}\" to \"{}\".",
        as_str(backup_to_import),
-        context.get_dbfile().display()
+        context
+            .get_dbfile()
+            .as_ref()
+            .map_or("<<None>>", |p| p.to_str().unwrap())
    );

-    if dc_is_configured(context) {
-        error!(context, "Cannot import backups to accounts in use.");
-        return false;
+    if 0 != dc_is_configured(context) {
+        error!(context, 0, "Cannot import backups to accounts in use.");
+        return 0;
    }
    &context.sql.close(&context);
-    dc_delete_file(context, context.get_dbfile());
-    if dc_file_exist(context, context.get_dbfile()) {
+    dc_delete_file(context, context.get_dbfile().unwrap());
+    if dc_file_exist(context, context.get_dbfile().unwrap()) {
        error!(
            context,
-            "Cannot import backups: Cannot delete the old file.",
+            0, "Cannot import backups: Cannot delete the old file.",
        );
-        return false;
+        return 0;
    }

-    if !dc_copy_file(context, as_path(backup_to_import), context.get_dbfile()) {
-        return false;
+    if !dc_copy_file(
+        context,
+        as_path(backup_to_import),
+        context.get_dbfile().unwrap(),
+    ) {
+        return 0;
    }
    /* error already logged */
    /* re-open copied database file */
-    if !context.sql.open(&context, &context.get_dbfile(), 0) {
-        return false;
+    if !context
+        .sql
+        .open(&context, &context.get_dbfile().unwrap(), 0)
+    {
+        return 0;
    }

    let total_files_cnt = context
        .sql
-        .query_get_value::<_, isize>(context, "SELECT COUNT(*) FROM backup_blobs;", params![])
+        .query_row_col::<_, isize>(context, "SELECT COUNT(*) FROM backup_blobs;", params![], 0)
        .unwrap_or_default() as usize;
    info!(
        context,
-        "***IMPORT-in-progress: total_files_cnt={:?}", total_files_cnt,
+        0, "***IMPORT-in-progress: total_files_cnt={:?}", total_files_cnt,
    );

    let res = context.sql.query_map(
@@ -633,19 +662,20 @@ unsafe fn import_backup(context: &Context, backup_to_import: *const libc::c_char
                if permille > 990 {
                    permille = 990
                }
-                context.call_cb(Event::ImexProgress(permille));
+                context.call_cb(Event::IMEX_PROGRESS, permille as uintptr_t, 0);
                if file_blob.is_empty() {
                    continue;
                }

-                let pathNfilename = context.get_blobdir().join(file_name);
+                let pathNfilename = format!("{}/{}", as_str(context.get_blobdir()), file_name);
                if dc_write_file_safe(context, &pathNfilename, &file_blob) {
                    continue;
                }
                error!(
                    context,
+                    0,
                    "Storage full? Cannot write file {} with {} bytes.",
-                    pathNfilename.display(),
+                    &pathNfilename,
                    file_blob.len(),
                );
                // otherwise the user may believe the stuff is imported correctly, but there are files missing ...
@@ -666,7 +696,7 @@ unsafe fn import_backup(context: &Context, backup_to_import: *const libc::c_char
        sql::try_execute(context, &context.sql, "VACUUM;").ok();
        Ok(())
    })
-    .is_ok()
+    .is_ok() as libc::c_int
 }

 /*******************************************************************************
@@ -674,10 +704,11 @@ unsafe fn import_backup(context: &Context, backup_to_import: *const libc::c_char
 ******************************************************************************/
 /* the FILE_PROGRESS macro calls the callback with the permille of files processed.
 The macro avoids weird values of 0% or 100% while still working. */
+// TODO should return bool /rtn
 #[allow(non_snake_case)]
-unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
+unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> libc::c_int {
    let mut ok_to_continue: bool;
-    let mut success = false;
+    let mut success: libc::c_int = 0;

    let mut delete_dest_file: libc::c_int = 0;
    // get a fine backup file name (the name includes the date so that multiple backup instances are possible)
@@ -689,7 +720,7 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
    let buffer = CString::yolo(res);
    let dest_pathNfilename = dc_get_fine_pathNfilename(context, dir, buffer.as_ptr());
    if dest_pathNfilename.is_null() {
-        error!(context, "Cannot get backup file name.",);
+        error!(context, 0, "Cannot get backup file name.",);

        return success;
    }
@@ -701,12 +732,22 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
    let mut closed = true;
    info!(
        context,
+        0,
        "Backup \"{}\" to \"{}\".",
-        context.get_dbfile().display(),
+        context
+            .get_dbfile()
+            .as_ref()
+            .map_or("<<None>>", |p| p.to_str().unwrap()),
        as_str(dest_pathNfilename),
    );
-    if dc_copy_file(context, context.get_dbfile(), as_path(dest_pathNfilename)) {
-        context.sql.open(&context, &context.get_dbfile(), 0);
+    if dc_copy_file(
+        context,
+        context.get_dbfile().unwrap(),
+        as_path(dest_pathNfilename),
+    ) {
+        context
+            .sql
+            .open(&context, &context.get_dbfile().unwrap(), 0);
        closed = false;
        /* add all files as blobs to the database copy (this does not require the source to be locked, neigher the destination as it is used only here) */
        /*for logging only*/
@@ -731,14 +772,14 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
            }
            if ok_to_continue {
                let mut total_files_cnt = 0;
-                let dir = context.get_blobdir();
-                if let Ok(dir_handle) = std::fs::read_dir(&dir) {
+                let dir = std::path::Path::new(as_str(context.get_blobdir()));
+                if let Ok(dir_handle) = std::fs::read_dir(dir) {
                    total_files_cnt += dir_handle.filter(|r| r.is_ok()).count();

-                    info!(context, "EXPORT: total_files_cnt={}", total_files_cnt);
+                    info!(context, 0, "EXPORT: total_files_cnt={}", total_files_cnt);
                    if total_files_cnt > 0 {
                        // scan directory, pass 2: copy files
-                        if let Ok(dir_handle) = std::fs::read_dir(&dir) {
+                        if let Ok(dir_handle) = std::fs::read_dir(dir) {
                            sql.prepare(
                                    "INSERT INTO backup_blobs (file_name, file_content) VALUES (?, ?);",
                                    move |mut stmt, _| {
@@ -769,7 +810,11 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
                                                if permille > 990 {
                                                    permille = 990;
                                                }
-                                                context.call_cb(Event::ImexProgress(permille));
+                                                context.call_cb(
+                                                    Event::IMEX_PROGRESS,
+                                                    permille as uintptr_t,
+                                                    0 as uintptr_t,
+                                                );

                                                let name_f = entry.file_name();
                                                let name = name_f.to_string_lossy();
@@ -777,8 +822,13 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
                                                {
                                                    continue;
                                                } else {
-                                                    info!(context, "EXPORTing filename={}", name);
-                                                    let curr_pathNfilename = context.get_blobdir().join(entry.file_name());
+                                                    info!(context, 0, "EXPORTing filename={}", name);
+                                                    let curr_pathNfilename = format!(
+                                                        "{}/{}",
+                                                        as_str(context.get_blobdir()),
+                                                        name
+                                                    );
+
                                                    if let Some(buf) =
                                                        dc_read_file_safe(context, &curr_pathNfilename)
                                                    {
@@ -788,8 +838,9 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
                                                        if stmt.execute(params![name, buf]).is_err() {
                                                            error!(
                                                                context,
+                                                                0,
                                                                "Disk full? Cannot add file \"{}\" to backup.",
-                                                                curr_pathNfilename.display(),
+                                                                &curr_pathNfilename,
                                                            );
                                                            /* this is not recoverable! writing to the sqlite database should work! */
                                                            ok_to_continue = false;
@@ -807,12 +858,13 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
                        } else {
                            error!(
                                context,
+                                0,
                                "Backup: Cannot copy from blob-directory \"{}\".",
-                                context.get_blobdir().display(),
+                                as_str(context.get_blobdir()),
                            );
                        }
                    } else {
-                        info!(context, "Backup: No files to copy.",);
+                        info!(context, 0, "Backup: No files to copy.",);
                        ok_to_continue = true;
                    }
                    if ok_to_continue {
@@ -820,24 +872,29 @@ unsafe fn export_backup(context: &Context, dir: *const libc::c_char) -> bool {
                            .set_config_int(context, "backup_time", now as i32)
                            .is_ok()
                        {
-                            context.call_cb(Event::ImexFileWritten(
-                                as_path(dest_pathNfilename).to_path_buf(),
-                            ));
-                            success = true;
+                            context.call_cb(
+                                Event::IMEX_FILE_WRITTEN,
+                                dest_pathNfilename as uintptr_t,
+                                0,
+                            );
+                            success = 1;
                        }
                    }
                } else {
                    error!(
                        context,
+                        0,
                        "Backup: Cannot get info for blob-directory \"{}\".",
-                        context.get_blobdir().display(),
+                        as_str(context.get_blobdir())
                    );
                };
            }
        }
    }
    if closed {
-        context.sql.open(&context, &context.get_dbfile(), 0);
+        context
+            .sql
+            .open(&context, &context.get_dbfile().unwrap(), 0);
    }
    if 0 != delete_dest_file {
        dc_delete_file(context, as_path(dest_pathNfilename));
@@ -862,7 +919,7 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
    let mut path_plus_name: *mut libc::c_char = ptr::null_mut();
    let mut set_default: libc::c_int;
    let mut buf: *mut libc::c_char = ptr::null_mut();
-    let mut buf_bytes: libc::size_t = 0;
+    let mut buf_bytes: size_t = 0 as size_t;
    // a pointer inside buf, MUST NOT be free()'d
    let mut private_key: *const libc::c_char;
    let mut buf2: *mut libc::c_char = ptr::null_mut();
@@ -891,7 +948,7 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
                    dir_name,
                    name_c.as_ptr(),
                );
-                info!(context, "Checking: {}", as_str(path_plus_name));
+                info!(context, 0, "Checking: {}", as_str(path_plus_name));
                free(buf as *mut libc::c_void);
                buf = ptr::null_mut();
                if 0 == dc_read_file(
@@ -935,6 +992,7 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
                {
                    info!(
                        context,
+                        0,
                        "Treating \"{}\" as a legacy private key.",
                        as_str(path_plus_name),
                    );
@@ -948,6 +1006,7 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
            if imported_cnt == 0i32 {
                error!(
                    context,
+                    0,
                    "No private keys found in \"{}\".",
                    as_str(dir_name),
                );
@@ -955,6 +1014,7 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
        } else {
            error!(
                context,
+                0,
                "Import: Cannot open directory \"{}\".",
                as_str(dir_name),
            );
@@ -969,7 +1029,8 @@ unsafe fn import_self_keys(context: &Context, dir_name: *const libc::c_char) ->
    imported_cnt
 }

-unsafe fn export_self_keys(context: &Context, dir: *const libc::c_char) -> bool {
+// TODO should return bool /rtn
+unsafe fn export_self_keys(context: &Context, dir: *const libc::c_char) -> libc::c_int {
    let mut export_errors = 0;

    context
@@ -991,14 +1052,14 @@ unsafe fn export_self_keys(context: &Context, dir: *const libc::c_char) -> bool
                for key_pair in keys {
                    let (id, public_key, private_key, is_default) = key_pair?;
                    if let Some(key) = public_key {
-                        if export_key_to_asc_file(context, dir, id, &key, is_default) {
+                        if 0 == export_key_to_asc_file(context, dir, id, &key, is_default) {
                            export_errors += 1;
                        }
                    } else {
                        export_errors += 1;
                    }
                    if let Some(key) = private_key {
-                        if export_key_to_asc_file(context, dir, id, &key, is_default) {
+                        if 0 == export_key_to_asc_file(context, dir, id, &key, is_default) {
                            export_errors += 1;
                        }
                    } else {
@@ -1011,20 +1072,25 @@ unsafe fn export_self_keys(context: &Context, dir: *const libc::c_char) -> bool
        )
        .unwrap();

-    export_errors == 0
+    if export_errors == 0 {
+        1
+    } else {
+        0
+    }
 }

 /*******************************************************************************
 * Classic key export
 ******************************************************************************/
+// TODO should return bool /rtn
 unsafe fn export_key_to_asc_file(
    context: &Context,
    dir: *const libc::c_char,
    id: libc::c_int,
    key: &Key,
    is_default: libc::c_int,
-) -> bool {
-    let mut success = false;
+) -> libc::c_int {
+    let mut success: libc::c_int = 0i32;
    let file_name;
    if 0 != is_default {
        file_name = dc_mprintf(
@@ -1048,13 +1114,17 @@ unsafe fn export_key_to_asc_file(
            id,
        )
    }
-    info!(context, "Exporting key {}", as_str(file_name),);
+    info!(context, 0, "Exporting key {}", as_str(file_name),);
    dc_delete_file(context, as_path(file_name));
-    if !key.write_asc_to_file(as_path(file_name), context) {
-        error!(context, "Cannot write key to {}", as_str(file_name),);
+    if !key.write_asc_to_file(file_name, context) {
+        error!(context, 0, "Cannot write key to {}", as_str(file_name),);
    } else {
-        context.call_cb(Event::ImexFileWritten(as_path(file_name).to_path_buf()));
-        success = true;
+        context.call_cb(
+            Event::IMEX_FILE_WRITTEN,
+            file_name as uintptr_t,
+            0i32 as uintptr_t,
+        );
+        success = 1i32
    }
    free(file_name as *mut libc::c_void);

@@ -1065,11 +1135,13 @@ unsafe fn export_key_to_asc_file(
 mod tests {
    use super::*;

+    use num_traits::ToPrimitive;
+
    use crate::test_utils::*;

    #[test]
    fn test_render_setup_file() {
-        let t = test_context(Some(Box::new(logging_cb)));
+        let t = test_context(Some(logging_cb));

        configure_alice_keypair(&t.ctx);
        let msg = dc_render_setup_file(&t.ctx, "hello").unwrap();
@@ -1087,19 +1159,22 @@ mod tests {
        assert!(msg.contains("-----END PGP MESSAGE-----\n"));
    }

-    fn ac_setup_msg_cb(ctx: &Context, evt: Event) -> libc::uintptr_t {
-        match evt {
-            Event::GetString {
-                id: StockMessage::AcSetupMsgBody,
-                ..
-            } => unsafe { "hello\r\nthere".strdup() as usize },
-            _ => logging_cb(ctx, evt),
+    unsafe extern "C" fn ac_setup_msg_cb(
+        ctx: &Context,
+        evt: Event,
+        d1: uintptr_t,
+        d2: uintptr_t,
+    ) -> uintptr_t {
+        if evt == Event::GET_STRING && d1 == StockMessage::AcSetupMsgBody.to_usize().unwrap() {
+            "hello\r\nthere".strdup() as usize
+        } else {
+            logging_cb(ctx, evt, d1, d2)
        }
    }

    #[test]
    fn test_render_setup_file_newline_replace() {
-        let t = test_context(Some(Box::new(ac_setup_msg_cb)));
+        let t = test_context(Some(ac_setup_msg_cb));
        configure_alice_keypair(&t.ctx);
        let msg = dc_render_setup_file(&t.ctx, "pw").unwrap();
        println!("{}", &msg);
--- a/src/dc_loginparam.rs
+++ b/src/dc_loginparam.rs
@@ -0,0 +1,214 @@
+use std::borrow::Cow;
+
+use crate::context::Context;
+use crate::sql::Sql;
+
+#[derive(Default, Debug)]
+#[allow(non_camel_case_types)]
+pub struct dc_loginparam_t {
+    pub addr: String,
+    pub mail_server: String,
+    pub mail_user: String,
+    pub mail_pw: String,
+    pub mail_port: i32,
+    pub send_server: String,
+    pub send_user: String,
+    pub send_pw: String,
+    pub send_port: i32,
+    pub server_flags: i32,
+}
+
+impl dc_loginparam_t {
+    pub fn addr_str(&self) -> &str {
+        self.addr.as_str()
+    }
+}
+
+pub fn dc_loginparam_new() -> dc_loginparam_t {
+    Default::default()
+}
+
+pub fn dc_loginparam_read(
+    context: &Context,
+    sql: &Sql,
+    prefix: impl AsRef<str>,
+) -> dc_loginparam_t {
+    let prefix = prefix.as_ref();
+
+    let key = format!("{}addr", prefix);
+    let addr = sql
+        .get_config(context, key)
+        .unwrap_or_default()
+        .trim()
+        .to_string();
+
+    let key = format!("{}mail_server", prefix);
+    let mail_server = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}mail_port", prefix);
+    let mail_port = sql.get_config_int(context, key).unwrap_or_default();
+
+    let key = format!("{}mail_user", prefix);
+    let mail_user = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}mail_pw", prefix);
+    let mail_pw = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}send_server", prefix);
+    let send_server = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}send_port", prefix);
+    let send_port = sql.get_config_int(context, key).unwrap_or_default();
+
+    let key = format!("{}send_user", prefix);
+    let send_user = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}send_pw", prefix);
+    let send_pw = sql.get_config(context, key).unwrap_or_default();
+
+    let key = format!("{}server_flags", prefix);
+    let server_flags = sql.get_config_int(context, key).unwrap_or_default();
+
+    dc_loginparam_t {
+        addr: addr.to_string(),
+        mail_server,
+        mail_user,
+        mail_pw,
+        mail_port,
+        send_server,
+        send_user,
+        send_pw,
+        send_port,
+        server_flags,
+    }
+}
+
+pub fn dc_loginparam_write(
+    context: &Context,
+    loginparam: &dc_loginparam_t,
+    sql: &Sql,
+    prefix: impl AsRef<str>,
+) {
+    let prefix = prefix.as_ref();
+
+    let key = format!("{}addr", prefix);
+    sql.set_config(context, key, Some(&loginparam.addr)).ok();
+
+    let key = format!("{}mail_server", prefix);
+    sql.set_config(context, key, Some(&loginparam.mail_server))
+        .ok();
+
+    let key = format!("{}mail_port", prefix);
+    sql.set_config_int(context, key, loginparam.mail_port).ok();
+
+    let key = format!("{}mail_user", prefix);
+    sql.set_config(context, key, Some(&loginparam.mail_user))
+        .ok();
+
+    let key = format!("{}mail_pw", prefix);
+    sql.set_config(context, key, Some(&loginparam.mail_pw)).ok();
+
+    let key = format!("{}send_server", prefix);
+    sql.set_config(context, key, Some(&loginparam.send_server))
+        .ok();
+
+    let key = format!("{}send_port", prefix);
+    sql.set_config_int(context, key, loginparam.send_port).ok();
+
+    let key = format!("{}send_user", prefix);
+    sql.set_config(context, key, Some(&loginparam.send_user))
+        .ok();
+
+    let key = format!("{}send_pw", prefix);
+    sql.set_config(context, key, Some(&loginparam.send_pw)).ok();
+
+    let key = format!("{}server_flags", prefix);
+    sql.set_config_int(context, key, loginparam.server_flags)
+        .ok();
+}
+
+fn unset_empty(s: &String) -> Cow<String> {
+    if s.is_empty() {
+        Cow::Owned("unset".to_string())
+    } else {
+        Cow::Borrowed(s)
+    }
+}
+
+pub fn dc_loginparam_get_readable(loginparam: &dc_loginparam_t) -> String {
+    let unset = "0";
+    let pw = "***";
+
+    let flags_readable = get_readable_flags(loginparam.server_flags);
+
+    format!(
+        "{} {}:{}:{}:{} {}:{}:{}:{} {}",
+        unset_empty(&loginparam.addr),
+        unset_empty(&loginparam.mail_user),
+        if !loginparam.mail_pw.is_empty() {
+            pw
+        } else {
+            unset
+        },
+        unset_empty(&loginparam.mail_server),
+        loginparam.mail_port,
+        unset_empty(&loginparam.send_user),
+        if !loginparam.send_pw.is_empty() {
+            pw
+        } else {
+            unset
+        },
+        unset_empty(&loginparam.send_server),
+        loginparam.send_port,
+        flags_readable,
+    )
+}
+
+fn get_readable_flags(flags: i32) -> String {
+    let mut res = String::new();
+    for bit in 0..31 {
+        if 0 != flags & 1 << bit {
+            let mut flag_added = 0;
+            if 1 << bit == 0x2 {
+                res += "OAUTH2 ";
+                flag_added = 1;
+            }
+            if 1 << bit == 0x4 {
+                res += "AUTH_NORMAL ";
+                flag_added = 1;
+            }
+            if 1 << bit == 0x100 {
+                res += "IMAP_STARTTLS ";
+                flag_added = 1;
+            }
+            if 1 << bit == 0x200 {
+                res += "IMAP_SSL ";
+                flag_added = 1;
+            }
+            if 1 << bit == 0x400 {
+                res += "IMAP_PLAIN ";
+                flag_added = 1;
+            }
+            if 1 << bit == 0x10000 {
+                res += "SMTP_STARTTLS ";
+                flag_added = 1
+            }
+            if 1 << bit == 0x20000 {
+                res += "SMTP_SSL ";
+                flag_added = 1
+            }
+            if 1 << bit == 0x40000 {
+                res += "SMTP_PLAIN ";
+                flag_added = 1
+            }
+            if 0 == flag_added {
+                res += &format!("{:#0x}", 1 << bit);
+            }
+        }
+    }
+    if res.is_empty() {
+        res += "0";
+    }
+
+    res
+}
--- a/src/dc_mimefactory.rs
+++ b/src/dc_mimefactory.rs
@@ -2,7 +2,6 @@ use std::ffi::CString;
 use std::ptr;

 use chrono::TimeZone;
-use mmime::clist::*;
 use mmime::mailimf_types::*;
 use mmime::mailimf_types_helper::*;
 use mmime::mailmime_disposition::*;
@@ -15,8 +14,7 @@ use mmime::other::*;
 use crate::chat::{self, Chat};
 use crate::constants::*;
 use crate::contact::*;
-use crate::context::{get_version_str, Context};
-use crate::dc_mimeparser::SystemMessage;
+use crate::context::{dc_get_version_str, Context};
 use crate::dc_strencode::*;
 use crate::dc_tools::*;
 use crate::e2ee::*;
@@ -25,6 +23,7 @@ use crate::location;
 use crate::message::*;
 use crate::param::*;
 use crate::stock::StockMessage;
+use crate::types::*;
 use crate::x::*;

 #[derive(Clone)]
@@ -38,16 +37,16 @@ pub struct dc_mimefactory_t<'a> {
    pub timestamp: i64,
    pub rfc724_mid: *mut libc::c_char,
    pub loaded: dc_mimefactory_loaded_t,
-    pub msg: Message,
-    pub chat: Option<Chat>,
-    pub increation: bool,
+    pub msg: Message<'a>,
+    pub chat: Option<Chat<'a>>,
+    pub increation: libc::c_int,
    pub in_reply_to: *mut libc::c_char,
    pub references: *mut libc::c_char,
    pub req_mdn: libc::c_int,
    pub out: *mut MMAPString,
    pub out_encrypted: libc::c_int,
    pub out_gossiped: libc::c_int,
-    pub out_last_added_location_id: u32,
+    pub out_last_added_location_id: uint32_t,
    pub error: *mut libc::c_char,
    pub context: &'a Context,
 }
@@ -103,7 +102,7 @@ pub unsafe fn dc_mimefactory_load_msg(
        loaded: DC_MF_NOTHING_LOADED,
        msg,
        chat: Some(chat),
-        increation: false,
+        increation: 0,
        in_reply_to: ptr::null_mut(),
        references: ptr::null_mut(),
        req_mdn: 0,
@@ -149,7 +148,7 @@ pub unsafe fn dc_mimefactory_load_msg(
                    for row in rows {
                        let (authname, addr) = row?;
                        let addr_c = addr.strdup();
-                        if !clist_search_string_nocase(factory.recipients_addr, addr_c) {
+                        if clist_search_string_nocase(factory.recipients_addr, addr_c) == 0 {
                            clist_insert_after(
                                factory.recipients_names,
                                (*factory.recipients_names).last,
@@ -171,10 +170,10 @@ pub unsafe fn dc_mimefactory_load_msg(
            )
            .unwrap();

-        let command = factory.msg.param.get_cmd();
+        let command = factory.msg.param.get_int(Param::Cmd).unwrap_or_default();
        let msg = &factory.msg;

-        if command == SystemMessage::MemberRemovedFromGroup {
+        if command == 5 {
            let email_to_remove = msg.param.get(Param::Arg).unwrap_or_default();
            let email_to_remove_c = email_to_remove.strdup();

@@ -184,7 +183,7 @@ pub unsafe fn dc_mimefactory_load_msg(
                .unwrap_or_default();

            if !email_to_remove.is_empty() && email_to_remove != self_addr {
-                if !clist_search_string_nocase(factory.recipients_addr, email_to_remove_c) {
+                if clist_search_string_nocase(factory.recipients_addr, email_to_remove_c) == 0 {
                    clist_insert_after(
                        factory.recipients_names,
                        (*factory.recipients_names).last,
@@ -198,8 +197,8 @@ pub unsafe fn dc_mimefactory_load_msg(
                }
            }
        }
-        if command != SystemMessage::AutocryptSetupMessage
-            && command != SystemMessage::SecurejoinMessage
+        if command != 6
+            && command != 7
            && 0 != context
                .sql
                .get_config_int(context, "mdns_enabled")
@@ -226,7 +225,7 @@ pub unsafe fn dc_mimefactory_load_msg(
        Err(err) => {
            error!(
                context,
-                "mimefactory: failed to load mime_in_reply_to: {:?}", err
+                0, "mimefactory: failed to load mime_in_reply_to: {:?}", err
            );
        }
    }
@@ -265,7 +264,7 @@ unsafe fn load_from(factory: &mut dc_mimefactory_t) {

 pub unsafe fn dc_mimefactory_load_mdn<'a>(
    context: &'a Context,
-    msg_id: u32,
+    msg_id: uint32_t,
 ) -> Result<dc_mimefactory_t, Error> {
    if 0 == context
        .sql
@@ -291,7 +290,7 @@ pub unsafe fn dc_mimefactory_load_mdn<'a>(
        loaded: DC_MF_NOTHING_LOADED,
        msg,
        chat: None,
-        increation: false,
+        increation: 0,
        in_reply_to: ptr::null_mut(),
        references: ptr::null_mut(),
        req_mdn: 0,
@@ -335,7 +334,8 @@ pub unsafe fn dc_mimefactory_load_mdn<'a>(
    Ok(factory)
 }

-pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefactory_t) -> bool {
+// TODO should return bool /rtn
+pub unsafe fn dc_mimefactory_render(factory: &mut dc_mimefactory_t) -> libc::c_int {
    let subject: *mut mailimf_subject;
    let mut ok_to_continue = true;
    let imf_fields: *mut mailimf_fields;
@@ -345,7 +345,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
    let mut subject_str: *mut libc::c_char = ptr::null_mut();
    let mut afwd_email: libc::c_int = 0;
    let mut col: libc::c_int = 0;
-    let mut success = false;
+    let mut success: libc::c_int = 0;
    let mut parts: libc::c_int = 0;
    let mut e2ee_guaranteed: libc::c_int = 0;
    let mut min_verified: libc::c_int = 0;
@@ -459,18 +459,19 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
            .map(|s| format!("/{}", s))
            .unwrap_or_default();
        let os_part = CString::new(os_part).expect("String -> CString conversion failed");
-        let version = CString::yolo(get_version_str());
+        let version = dc_get_version_str();
        mailimf_fields_add(
            imf_fields,
            mailimf_field_new_custom(
                strdup(b"X-Mailer\x00" as *const u8 as *const libc::c_char),
                dc_mprintf(
                    b"Delta Chat Core %s%s\x00" as *const u8 as *const libc::c_char,
-                    version.as_ptr(),
+                    version,
                    os_part.as_ptr(),
                ),
            ),
        );
+        free(version.cast());

        mailimf_fields_add(
            imf_fields,
@@ -530,7 +531,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
            }

            /* build header etc. */
-            let command = factory.msg.param.get_cmd();
+            let command = factory.msg.param.get_int(Param::Cmd).unwrap_or_default();
            if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup {
                mailimf_fields_add(
                    imf_fields,
@@ -547,8 +548,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                        dc_encode_header_words(name.as_ptr()),
                    ),
                );
-
-                if command == SystemMessage::MemberRemovedFromGroup {
+                if command == 5 {
                    let email_to_remove = factory
                        .msg
                        .param
@@ -567,7 +567,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                            ),
                        );
                    }
-                } else if command == SystemMessage::MemberAddedToGroup {
+                } else if command == 4 {
                    let msg = &factory.msg;
                    do_gossip = 1;
                    let email_to_add = msg.param.get(Param::Arg).unwrap_or_default().strdup();
@@ -586,7 +586,8 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    }
                    if 0 != msg.param.get_int(Param::Arg2).unwrap_or_default() & 0x1 {
                        info!(
-                            context,
+                            msg.context,
+                            0,
                            "sending secure-join message \'{}\' >>>>>>>>>>>>>>>>>>>>>>>>>",
                            "vg-member-added",
                        );
@@ -598,7 +599,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                            ),
                        );
                    }
-                } else if command == SystemMessage::GroupNameChanged {
+                } else if command == 2 {
                    let msg = &factory.msg;

                    let value_to_add = msg.param.get(Param::Arg).unwrap_or_default().strdup();
@@ -611,7 +612,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                            value_to_add,
                        ),
                    );
-                } else if command == SystemMessage::GroupImageChanged {
+                } else if command == 3 {
                    let msg = &factory.msg;
                    grpimage = msg.param.get(Param::Arg);
                    if grpimage.is_none() {
@@ -625,8 +626,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    }
                }
            }
-
-            if command == SystemMessage::LocationStreamingEnabled {
+            if command == 8 {
                mailimf_fields_add(
                    imf_fields,
                    mailimf_field_new_custom(
@@ -637,7 +637,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    ),
                );
            }
-            if command == SystemMessage::AutocryptSetupMessage {
+            if command == 6 {
                mailimf_fields_add(
                    imf_fields,
                    mailimf_field_new_custom(
@@ -650,12 +650,13 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    .stock_str(StockMessage::AcSetupMsgBody)
                    .strdup();
            }
-            if command == SystemMessage::SecurejoinMessage {
+            if command == 7 {
                let msg = &factory.msg;
                let step = msg.param.get(Param::Arg).unwrap_or_default().strdup();
                if strlen(step) > 0 {
                    info!(
-                        context,
+                        msg.context,
+                        0,
                        "sending secure-join message \'{}\' >>>>>>>>>>>>>>>>>>>>>>>>>",
                        as_str(step),
                    );
@@ -724,16 +725,13 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    }
                }
            }
-
            if let Some(grpimage) = grpimage {
-                info!(factory.context, "setting group image '{}'", grpimage);
-                let mut meta = dc_msg_new_untyped();
+                let mut meta = dc_msg_new_untyped(factory.context);
                meta.type_0 = Viewtype::Image;
                meta.param.set(Param::File, grpimage);

                let mut filename_as_sent = ptr::null_mut();
                meta_part = build_body_file(
-                    context,
                    &meta,
                    b"group-image\x00" as *const u8 as *const libc::c_char,
                    &mut filename_as_sent,
@@ -836,7 +834,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact

            /* add attachment part */
            if chat::msgtype_has_file(factory.msg.type_0) {
-                if !is_file_size_okay(context, &factory.msg) {
+                if !is_file_size_okay(&factory.msg) {
                    let error: *mut libc::c_char = dc_mprintf(
                        b"Message exceeds the recommended %i MB.\x00" as *const u8
                            as *const libc::c_char,
@@ -847,7 +845,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    ok_to_continue = false;
                } else {
                    let file_part: *mut mailmime =
-                        build_body_file(context, &factory.msg, ptr::null(), ptr::null_mut());
+                        build_body_file(&factory.msg, ptr::null(), ptr::null_mut());
                    if !file_part.is_null() {
                        mailmime_smart_add_part(message, file_part);
                        parts += 1
@@ -895,9 +893,12 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                        mailmime_smart_add_part(message, kml_mime_part);
                    }

-                    if location::is_sending_locations_to_chat(context, factory.msg.chat_id) {
+                    if location::is_sending_locations_to_chat(
+                        factory.msg.context,
+                        factory.msg.chat_id,
+                    ) {
                        if let Ok((kml_file, last_added_location_id)) =
-                            location::get_kml(context, factory.msg.chat_id)
+                            location::get_kml(factory.msg.context, factory.msg.chat_id)
                        {
                            let content_type = mailmime_content_new_with_str(
                                b"application/vnd.google-earth.kml+xml\x00" as *const u8
@@ -950,7 +951,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    .stock_str(StockMessage::EncryptedMsg)
                    .into_owned()
            } else {
-                to_string(dc_msg_get_summarytext(context, &mut factory.msg, 32))
+                to_string(dc_msg_get_summarytext(&mut factory.msg, 32))
            };
            let p2 = factory
                .context
@@ -958,16 +959,16 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
            message_text = format!("{}\r\n", p2).strdup();
            let human_mime_part: *mut mailmime = build_body_text(message_text);
            mailmime_add_part(multipart, human_mime_part);
-            let version = CString::yolo(get_version_str());
+            let version = dc_get_version_str();
            message_text2 =
                dc_mprintf(
                    b"Reporting-UA: Delta Chat %s\r\nOriginal-Recipient: rfc822;%s\r\nFinal-Recipient: rfc822;%s\r\nOriginal-Message-ID: <%s>\r\nDisposition: manual-action/MDN-sent-automatically; displayed\r\n\x00"
                        as *const u8 as *const libc::c_char,
-                    version.as_ptr(),
+                    version,
                    factory.from_addr, factory.from_addr,
                    factory.msg.rfc724_mid
                );
-
+            free(version.cast());
            let content_type_0: *mut mailmime_content = mailmime_content_new_with_str(
                b"message/disposition-notification\x00" as *const u8 as *const libc::c_char,
            );
@@ -994,8 +995,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
                    e.as_ptr(),
                );
            } else {
-                subject_str =
-                    get_subject(context, factory.chat.as_ref(), &mut factory.msg, afwd_email)
+                subject_str = get_subject(factory.chat.as_ref(), &mut factory.msg, afwd_email)
            }
            subject = mailimf_subject_new(dc_encode_header_words(subject_str));
            mailimf_fields_add(
@@ -1045,7 +1045,7 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
            }
            factory.out = mmap_string_new(b"\x00" as *const u8 as *const libc::c_char);
            mailmime_write_mem(factory.out, &mut col, message);
-            success = true;
+            success = 1;
        }
    }

@@ -1061,7 +1061,6 @@ pub unsafe fn dc_mimefactory_render(context: &Context, factory: &mut dc_mimefact
 }

 unsafe fn get_subject(
-    context: &Context,
    chat: Option<&Chat>,
    msg: &mut Message,
    afwd_email: libc::c_int,
@@ -1071,6 +1070,7 @@ unsafe fn get_subject(
    }

    let chat = chat.unwrap();
+    let context = chat.context;
    let ret: *mut libc::c_char;

    let raw_subject = {
@@ -1083,7 +1083,7 @@ unsafe fn get_subject(
    } else {
        b"\x00" as *const u8 as *const libc::c_char
    };
-    if msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage {
+    if msg.param.get_int(Param::Cmd).unwrap_or_default() == 6 {
        ret = context.stock_str(StockMessage::AcSetupMsgSubject).strdup()
    } else if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup {
        ret = format!(
@@ -1135,7 +1135,6 @@ unsafe fn build_body_text(text: *mut libc::c_char) -> *mut mailmime {

 #[allow(non_snake_case)]
 unsafe fn build_body_file(
-    context: &Context,
    msg: &Message,
    mut base_name: *const libc::c_char,
    ret_file_name_as_sent: *mut *mut libc::c_char,
@@ -1219,7 +1218,7 @@ unsafe fn build_body_file(
            /* create mime part, for Content-Disposition, see RFC 2183.
            `Content-Disposition: attachment` seems not to make a difference to `Content-Disposition: inline` at least on tested Thunderbird and Gma'l in 2017.
            But I've heard about problems with inline and outl'k, so we just use the attachment-type until we run into other problems ... */
-            needs_ext = dc_needs_ext_header(as_str(filename_to_send));
+            needs_ext = dc_needs_ext_header(filename_to_send);
            mime_fields = mailmime_fields_new_filename(
                MAILMIME_DISPOSITION_TYPE_ATTACHMENT as libc::c_int,
                if needs_ext {
@@ -1251,12 +1250,12 @@ unsafe fn build_body_file(
                                    ptr::null_mut(),
                                    ptr::null_mut(),
                                    ptr::null_mut(),
-                                    0 as libc::size_t,
+                                    0 as size_t,
                                    mailmime_parameter_new(
                                        strdup(
                                            b"filename*\x00" as *const u8 as *const libc::c_char,
                                        ),
-                                        dc_encode_ext_header(as_str(filename_to_send)).strdup(),
+                                        dc_encode_ext_header(filename_to_send),
                                    ),
                                );
                            if !parm.is_null() {
@@ -1288,10 +1287,7 @@ unsafe fn build_body_file(
                ) as *mut libc::c_void,
            );
            mime_sub = mailmime_new_empty(content, mime_fields);
-            let abs_path = dc_get_abs_path(context, path_filename)
-                .to_c_string()
-                .unwrap();
-            mailmime_set_body_file(mime_sub, dc_strdup(abs_path.as_ptr()));
+            mailmime_set_body_file(mime_sub, dc_get_abs_path(msg.context, path_filename));
            if !ret_file_name_as_sent.is_null() {
                *ret_file_name_as_sent = dc_strdup(filename_to_send)
            }
@@ -1308,10 +1304,10 @@ unsafe fn build_body_file(
 /*******************************************************************************
 * Render
 ******************************************************************************/
-unsafe fn is_file_size_okay(context: &Context, msg: &Message) -> bool {
+unsafe fn is_file_size_okay(msg: &Message) -> bool {
    let mut file_size_okay = true;
    let path = msg.param.get(Param::File).unwrap_or_default();
-    let bytes = dc_get_filebytes(context, &path);
+    let bytes = dc_get_filebytes(msg.context, &path);

    if bytes > (49 * 1024 * 1024 / 4 * 3) {
        file_size_okay = false;
--- a/src/dc_mimeparser.rs
+++ b/src/dc_mimeparser.rs
--- a/src/dc_receive_imf.rs
+++ b/src/dc_receive_imf.rs
--- a/src/dc_strencode.rs
+++ b/src/dc_strencode.rs
@@ -1,30 +1,83 @@
-use std::borrow::Cow;
-use std::ffi::CString;
+use std::ffi::{CStr, CString};
 use std::ptr;

 use charset::Charset;
 use mmime::mailmime_decode::*;
 use mmime::mmapstring::*;
 use mmime::other::*;
-use percent_encoding::{percent_decode, utf8_percent_encode, AsciiSet, CONTROLS};

 use crate::dc_tools::*;
+use crate::types::*;
 use crate::x::*;

-/**
- * Encode non-ascii-strings as `=?UTF-8?Q?Bj=c3=b6rn_Petersen?=`.
- * Belongs to RFC 2047: https://tools.ietf.org/html/rfc2047
- *
- * We do not fold at position 72; this would result in empty words as `=?utf-8?Q??=` which are correct,
- * but cannot be displayed by some mail programs (eg. Android Stock Mail).
- * however, this is not needed, as long as _one_ word is not longer than 72 characters.
- * _if_ it is, the display may get weird.  This affects the subject only.
- * the best solution wor all this would be if libetpan encodes the line as only libetpan knowns when a header line is full.
- *
- * @param to_encode Null-terminated UTF-8-string to encode.
- * @return Returns the encoded string which must be free()'d when no longed needed.
- *     On errors, NULL is returned.
- */
+#[inline]
+fn isalnum(c: libc::c_int) -> libc::c_int {
+    if c < std::u8::MAX as libc::c_int {
+        (c as u8 as char).is_ascii_alphanumeric() as libc::c_int
+    } else {
+        0
+    }
+}
+
+/* ******************************************************************************
+ * URL encoding and decoding, RFC 3986
+ ******************************************************************************/
+unsafe fn int_2_uppercase_hex(code: libc::c_char) -> libc::c_char {
+    static mut HEX: [libc::c_char; 17] = [
+        48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65, 66, 67, 68, 69, 70, 0,
+    ];
+
+    HEX[(code as libc::c_int & 15i32) as usize]
+}
+
+pub unsafe fn dc_urldecode(to_decode: *const libc::c_char) -> *mut libc::c_char {
+    let mut pstr: *const libc::c_char = to_decode;
+    if to_decode.is_null() {
+        return dc_strdup(b"\x00" as *const u8 as *const libc::c_char);
+    }
+    let buf: *mut libc::c_char = malloc(strlen(to_decode).wrapping_add(1)) as *mut libc::c_char;
+    let mut pbuf: *mut libc::c_char = buf;
+    assert!(!buf.is_null());
+
+    while 0 != *pstr {
+        if *pstr as libc::c_int == '%' as i32 {
+            if 0 != *pstr.offset(1isize) as libc::c_int && 0 != *pstr.offset(2isize) as libc::c_int
+            {
+                let fresh5 = pbuf;
+                pbuf = pbuf.offset(1);
+                *fresh5 = ((hex_2_int(*pstr.offset(1isize)) as libc::c_int) << 4i32
+                    | hex_2_int(*pstr.offset(2isize)) as libc::c_int)
+                    as libc::c_char;
+                pstr = pstr.offset(2isize)
+            }
+        } else if *pstr as libc::c_int == '+' as i32 {
+            let fresh6 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh6 = ' ' as i32 as libc::c_char
+        } else {
+            let fresh7 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh7 = *pstr
+        }
+        pstr = pstr.offset(1isize)
+    }
+    *pbuf = '\u{0}' as i32 as libc::c_char;
+
+    buf
+}
+
+fn hex_2_int(ch: libc::c_char) -> libc::c_char {
+    let ch = ch as u8 as char;
+    if !ch.is_ascii_hexdigit() {
+        return (ch.to_ascii_lowercase() as i32 - 'a' as i32 + 10) as libc::c_char;
+    }
+
+    match ch.to_digit(16) {
+        Some(res) => res as libc::c_char,
+        None => 0,
+    }
+}
+
 pub unsafe fn dc_encode_header_words(to_encode: *const libc::c_char) -> *mut libc::c_char {
    let mut ok_to_continue = true;
    let mut ret_str: *mut libc::c_char = ptr::null_mut();
@@ -65,7 +118,7 @@ pub unsafe fn dc_encode_header_words(to_encode: *const libc::c_char) -> *mut lib
                        b"utf-8\x00" as *const u8 as *const libc::c_char,
                        mmapstr,
                        begin,
-                        end.wrapping_offset_from(begin) as libc::size_t,
+                        end.wrapping_offset_from(begin) as size_t,
                    ) {
                        ok_to_continue = false;
                        continue;
@@ -81,7 +134,7 @@ pub unsafe fn dc_encode_header_words(to_encode: *const libc::c_char) -> *mut lib
                        if mmap_string_append_len(
                            mmapstr,
                            end,
-                            cur.wrapping_offset_from(end) as libc::size_t,
+                            cur.wrapping_offset_from(end) as size_t,
                        )
                        .is_null()
                        {
@@ -92,7 +145,7 @@ pub unsafe fn dc_encode_header_words(to_encode: *const libc::c_char) -> *mut lib
                } else if mmap_string_append_len(
                    mmapstr,
                    begin,
-                    cur.wrapping_offset_from(begin) as libc::size_t,
+                    cur.wrapping_offset_from(begin) as size_t,
                )
                .is_null()
                {
@@ -121,10 +174,10 @@ unsafe fn quote_word(
    display_charset: *const libc::c_char,
    mmapstr: *mut MMAPString,
    word: *const libc::c_char,
-    size: libc::size_t,
+    size: size_t,
 ) -> bool {
    let mut cur: *const libc::c_char;
-    let mut i = 0;
+    let mut i: size_t = 0i32 as size_t;
    let mut hex: [libc::c_char; 4] = [0; 4];
    // let mut col: libc::c_int = 0i32;
    if mmap_string_append(mmapstr, b"=?\x00" as *const u8 as *const libc::c_char).is_null() {
@@ -187,7 +240,7 @@ unsafe fn get_word(
    {
        cur = cur.offset(1isize)
    }
-    *pto_be_quoted = to_be_quoted(begin, cur.wrapping_offset_from(begin) as libc::size_t);
+    *pto_be_quoted = to_be_quoted(begin, cur.wrapping_offset_from(begin) as size_t);
    *pend = cur;
 }

@@ -196,9 +249,9 @@ unsafe fn get_word(
 ******************************************************************************/

 /* see comment below */
-unsafe fn to_be_quoted(word: *const libc::c_char, size: libc::size_t) -> bool {
+unsafe fn to_be_quoted(word: *const libc::c_char, size: size_t) -> bool {
    let mut cur: *const libc::c_char = word;
-    let mut i = 0;
+    let mut i: size_t = 0i32 as size_t;
    while i < size {
        match *cur as libc::c_int {
            44 | 58 | 33 | 34 | 35 | 36 | 64 | 91 | 92 | 93 | 94 | 96 | 123 | 124 | 125 | 126
@@ -221,7 +274,7 @@ pub unsafe fn dc_decode_header_words(in_0: *const libc::c_char) -> *mut libc::c_
        return ptr::null_mut();
    }
    let mut out: *mut libc::c_char = ptr::null_mut();
-    let mut cur_token = 0;
+    let mut cur_token: size_t = 0i32 as size_t;
    let r: libc::c_int = mailmime_encoded_phrase_parse(
        b"iso-8859-1\x00" as *const u8 as *const libc::c_char,
        in_0,
@@ -237,88 +290,374 @@ pub unsafe fn dc_decode_header_words(in_0: *const libc::c_char) -> *mut libc::c_
    out
 }

-pub fn dc_decode_header_words_safe(input: &str) -> String {
-    static FROM_ENCODING: &[u8] = b"iso-8859-1\x00";
-    static TO_ENCODING: &[u8] = b"utf-8\x00";
-    let mut out = ptr::null_mut();
-    let mut cur_token = 0;
-    let input_c = CString::yolo(input);
-    unsafe {
-        let r = mailmime_encoded_phrase_parse(
-            FROM_ENCODING.as_ptr().cast(),
-            input_c.as_ptr(),
-            input.len(),
-            &mut cur_token,
-            TO_ENCODING.as_ptr().cast(),
-            &mut out,
-        );
-        if r as u32 != MAILIMF_NO_ERROR || out.is_null() {
-            input.to_string()
-        } else {
-            let res = to_string(out);
-            free(out.cast());
-            res
+#[cfg(test)]
+unsafe fn dc_encode_modified_utf7(
+    mut to_encode: *const libc::c_char,
+    change_spaces: libc::c_int,
+) -> *mut libc::c_char {
+    let mut utf8pos: libc::c_uint;
+    let mut utf8total: libc::c_uint;
+    let mut c: libc::c_uint;
+    let mut utf7mode: libc::c_uint;
+    let mut bitstogo: libc::c_uint;
+    let mut utf16flag: libc::c_uint;
+    let mut ucs4: libc::c_ulong = 0;
+    let mut bitbuf: libc::c_ulong = 0;
+    let mut dst: *mut libc::c_char;
+    let res: *mut libc::c_char;
+    if to_encode.is_null() {
+        return dc_strdup(b"\x00" as *const u8 as *const libc::c_char);
+    }
+    res = malloc(2usize.wrapping_mul(strlen(to_encode)).wrapping_add(1)) as *mut libc::c_char;
+    dst = res;
+    assert!(!dst.is_null());
+
+    utf7mode = 0i32 as libc::c_uint;
+    utf8total = 0i32 as libc::c_uint;
+    bitstogo = 0i32 as libc::c_uint;
+    utf8pos = 0i32 as libc::c_uint;
+    loop {
+        c = *to_encode as libc::c_uchar as libc::c_uint;
+        if !(c != '\u{0}' as i32 as libc::c_uint) {
+            break;
        }
-    }
-}
-
-pub fn dc_needs_ext_header(to_check: impl AsRef<str>) -> bool {
-    let to_check = to_check.as_ref();
-
-    if to_check.is_empty() {
-        return false;
-    }
-
-    to_check.chars().any(|c| {
-        !(c.is_ascii_alphanumeric()
-            || c == '-'
-            || c == '_'
-            || c == '_'
-            || c == '.'
-            || c == '~'
-            || c == '%')
-    })
-}
-
-const EXT_ASCII_ST: &AsciiSet = &CONTROLS
-    .add(b' ')
-    .add(b'-')
-    .add(b'_')
-    .add(b'.')
-    .add(b'~')
-    .add(b'%');
-
-/// Encode an UTF-8 string to the extended header format.
-pub fn dc_encode_ext_header(to_encode: impl AsRef<str>) -> String {
-    let encoded = utf8_percent_encode(to_encode.as_ref(), &EXT_ASCII_ST);
-    format!("utf-8''{}", encoded)
-}
-
-/// Decode an extended-header-format strings to UTF-8.
-pub fn dc_decode_ext_header(to_decode: &[u8]) -> Cow<str> {
-    if let Some(index) = bytes!(b'\'').find(to_decode) {
-        let (charset, rest) = to_decode.split_at(index);
-        if !charset.is_empty() {
-            // skip language
-            if let Some(index2) = bytes!(b'\'').find(&rest[1..]) {
-                let decoded = percent_decode(&rest[index2 + 2..]);
-
-                if charset != b"utf-8" && charset != b"UTF-8" {
-                    if let Some(encoding) = Charset::for_label(charset) {
-                        let bytes = decoded.collect::<Vec<u8>>();
-                        let (res, _, _) = encoding.decode(&bytes);
-                        return Cow::Owned(res.into_owned());
-                    } else {
-                        return decoded.decode_utf8_lossy();
-                    }
+        to_encode = to_encode.offset(1isize);
+        // normal character?
+        if c >= ' ' as i32 as libc::c_uint
+            && c <= '~' as i32 as libc::c_uint
+            && (c != '_' as i32 as libc::c_uint || 0 == change_spaces)
+        {
+            if 0 != utf7mode {
+                if 0 != bitstogo {
+                    let fresh8 = dst;
+                    dst = dst.offset(1);
+                    *fresh8 = BASE64CHARS
+                        [(bitbuf << (6i32 as libc::c_uint).wrapping_sub(bitstogo) & 0x3f) as usize]
+                }
+                let fresh9 = dst;
+                dst = dst.offset(1);
+                *fresh9 = '-' as i32 as libc::c_char;
+                utf7mode = 0i32 as libc::c_uint;
+                utf8pos = 0i32 as libc::c_uint;
+                bitstogo = 0i32 as libc::c_uint;
+                utf8total = 0i32 as libc::c_uint
+            }
+            if 0 != change_spaces && c == ' ' as i32 as libc::c_uint {
+                let fresh10 = dst;
+                dst = dst.offset(1);
+                *fresh10 = '_' as i32 as libc::c_char
+            } else {
+                let fresh11 = dst;
+                dst = dst.offset(1);
+                *fresh11 = c as libc::c_char
+            }
+            if c == '&' as i32 as libc::c_uint {
+                let fresh12 = dst;
+                dst = dst.offset(1);
+                *fresh12 = '-' as i32 as libc::c_char
+            }
+        } else {
+            if 0 == utf7mode {
+                let fresh13 = dst;
+                dst = dst.offset(1);
+                *fresh13 = '&' as i32 as libc::c_char;
+                utf7mode = 1i32 as libc::c_uint
+            }
+            // encode ascii characters as themselves
+            if c < 0x80i32 as libc::c_uint {
+                ucs4 = c as libc::c_ulong
+            } else if 0 != utf8total {
+                ucs4 = ucs4 << 6i32 | c as libc::c_ulong & 0x3f;
+                utf8pos = utf8pos.wrapping_add(1);
+                if utf8pos < utf8total {
+                    continue;
+                }
+            } else {
+                utf8pos = 1i32 as libc::c_uint;
+                if c < 0xe0i32 as libc::c_uint {
+                    utf8total = 2i32 as libc::c_uint;
+                    ucs4 = (c & 0x1fi32 as libc::c_uint) as libc::c_ulong
+                } else if c < 0xf0i32 as libc::c_uint {
+                    utf8total = 3i32 as libc::c_uint;
+                    ucs4 = (c & 0xfi32 as libc::c_uint) as libc::c_ulong
                } else {
-                    return decoded.decode_utf8_lossy();
+                    utf8total = 4i32 as libc::c_uint;
+                    ucs4 = (c & 0x3i32 as libc::c_uint) as libc::c_ulong
+                }
+                continue;
+            }
+            utf8total = 0i32 as libc::c_uint;
+            loop {
+                if ucs4 >= 0x10000 {
+                    ucs4 = ucs4.wrapping_sub(0x10000);
+                    bitbuf = bitbuf << 16 | (ucs4 >> 10).wrapping_add(0xd800);
+                    ucs4 = (ucs4 & 0x3ff).wrapping_add(0xdc00);
+                    utf16flag = 1i32 as libc::c_uint
+                } else {
+                    bitbuf = bitbuf << 16 | ucs4;
+                    utf16flag = 0i32 as libc::c_uint
+                }
+                bitstogo = bitstogo.wrapping_add(16i32 as libc::c_uint);
+                while bitstogo >= 6i32 as libc::c_uint {
+                    bitstogo = bitstogo.wrapping_sub(6i32 as libc::c_uint);
+                    let fresh14 = dst;
+                    dst = dst.offset(1);
+                    *fresh14 = BASE64CHARS[(if 0 != bitstogo {
+                        bitbuf >> bitstogo
+                    } else {
+                        bitbuf
+                    } & 0x3f) as usize]
+                }
+                if !(0 != utf16flag) {
+                    break;
                }
            }
        }
    }
+    if 0 != utf7mode {
+        if 0 != bitstogo {
+            let fresh15 = dst;
+            dst = dst.offset(1);
+            *fresh15 = BASE64CHARS
+                [(bitbuf << (6i32 as libc::c_uint).wrapping_sub(bitstogo) & 0x3f) as usize]
+        }
+        let fresh16 = dst;
+        dst = dst.offset(1);
+        *fresh16 = '-' as i32 as libc::c_char
+    }
+    *dst = '\u{0}' as i32 as libc::c_char;

-    String::from_utf8_lossy(to_decode)
+    res
+}
+
+/* ******************************************************************************
+ * Encode/decode modified UTF-7 as needed for IMAP, see RFC 2192
+ ******************************************************************************/
+
+// UTF7 modified base64 alphabet
+#[cfg(test)]
+static mut BASE64CHARS: [libc::c_char; 65] = [
+    65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88,
+    89, 90, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114,
+    115, 116, 117, 118, 119, 120, 121, 122, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 43, 44, 0,
+];
+
+#[cfg(test)]
+unsafe fn dc_decode_modified_utf7(
+    to_decode: *const libc::c_char,
+    change_spaces: libc::c_int,
+) -> *mut libc::c_char {
+    let mut c: libc::c_uint;
+    let mut i: libc::c_uint;
+    let mut bitcount: libc::c_uint;
+    let mut ucs4: libc::c_ulong;
+    let mut utf16: libc::c_ulong;
+    let mut bitbuf: libc::c_ulong;
+    let mut base64: [libc::c_uchar; 256] = [0; 256];
+    let mut src: *const libc::c_char;
+    let mut dst: *mut libc::c_char;
+    let res: *mut libc::c_char;
+    if to_decode.is_null() {
+        return dc_strdup(b"\x00" as *const u8 as *const libc::c_char);
+    }
+    res = malloc(4usize.wrapping_mul(strlen(to_decode)).wrapping_add(1)) as *mut libc::c_char;
+    dst = res;
+    src = to_decode;
+    assert!(!dst.is_null());
+
+    libc::memset(
+        base64.as_mut_ptr() as *mut libc::c_void,
+        64,
+        ::std::mem::size_of::<[libc::c_uchar; 256]>(),
+    );
+    i = 0i32 as libc::c_uint;
+    while (i as libc::c_ulong) < ::std::mem::size_of::<[libc::c_char; 65]>() as libc::c_ulong {
+        base64[BASE64CHARS[i as usize] as libc::c_uint as usize] = i as libc::c_uchar;
+        i = i.wrapping_add(1)
+    }
+    while *src as libc::c_int != '\u{0}' as i32 {
+        let fresh17 = src;
+        src = src.offset(1);
+        c = *fresh17 as libc::c_uint;
+        if c != '&' as i32 as libc::c_uint || *src as libc::c_int == '-' as i32 {
+            if 0 != change_spaces && c == '_' as i32 as libc::c_uint {
+                let fresh18 = dst;
+                dst = dst.offset(1);
+                *fresh18 = ' ' as i32 as libc::c_char
+            } else {
+                let fresh19 = dst;
+                dst = dst.offset(1);
+                *fresh19 = c as libc::c_char
+            }
+            if c == '&' as i32 as libc::c_uint {
+                src = src.offset(1isize)
+            }
+        } else {
+            bitbuf = 0;
+            bitcount = 0i32 as libc::c_uint;
+            ucs4 = 0;
+            loop {
+                c = base64[*src as libc::c_uchar as usize] as libc::c_uint;
+                if !(c != 64i32 as libc::c_uint) {
+                    break;
+                }
+                src = src.offset(1isize);
+                bitbuf = bitbuf << 6i32 | c as libc::c_ulong;
+                bitcount = bitcount.wrapping_add(6i32 as libc::c_uint);
+                // enough bits for a UTF-16 character?
+                if !(bitcount >= 16i32 as libc::c_uint) {
+                    continue;
+                }
+                bitcount = bitcount.wrapping_sub(16i32 as libc::c_uint);
+                utf16 = if 0 != bitcount {
+                    bitbuf >> bitcount
+                } else {
+                    bitbuf
+                } & 0xffff;
+
+                // convert UTF16 to UCS4
+                if utf16 >= 0xd800 && utf16 <= 0xdbff {
+                    ucs4 = utf16.wrapping_sub(0xd800) << 10i32
+                } else {
+                    if utf16 >= 0xdc00 && utf16 <= 0xdfff {
+                        ucs4 = ucs4.wrapping_add(utf16.wrapping_sub(0xdc00).wrapping_add(0x10000))
+                    } else {
+                        ucs4 = utf16
+                    }
+                    if ucs4 <= 0x7f {
+                        *dst.offset(0isize) = ucs4 as libc::c_char;
+                        dst = dst.offset(1isize)
+                    } else if ucs4 <= 0x7ff {
+                        *dst.offset(0isize) = (0xc0 | ucs4 >> 6i32) as libc::c_char;
+                        *dst.offset(1isize) = (0x80 | ucs4 & 0x3f) as libc::c_char;
+                        dst = dst.offset(2isize)
+                    } else if ucs4 <= 0xffff {
+                        *dst.offset(0isize) = (0xe0 | ucs4 >> 12i32) as libc::c_char;
+                        *dst.offset(1isize) = (0x80 | ucs4 >> 6i32 & 0x3f) as libc::c_char;
+                        *dst.offset(2isize) = (0x80 | ucs4 & 0x3f) as libc::c_char;
+                        dst = dst.offset(3isize)
+                    } else {
+                        *dst.offset(0isize) = (0xf0 | ucs4 >> 18i32) as libc::c_char;
+                        *dst.offset(1isize) = (0x80 | ucs4 >> 12i32 & 0x3f) as libc::c_char;
+                        *dst.offset(2isize) = (0x80 | ucs4 >> 6i32 & 0x3f) as libc::c_char;
+                        *dst.offset(3isize) = (0x80 | ucs4 & 0x3f) as libc::c_char;
+                        dst = dst.offset(4isize)
+                    }
+                }
+            }
+            if *src as libc::c_int == '-' as i32 {
+                src = src.offset(1isize)
+            }
+        }
+    }
+    *dst = '\u{0}' as i32 as libc::c_char;
+
+    res
+}
+
+pub unsafe fn dc_needs_ext_header(mut to_check: *const libc::c_char) -> bool {
+    if !to_check.is_null() {
+        while 0 != *to_check {
+            if 0 == isalnum(*to_check as libc::c_int)
+                && *to_check as libc::c_int != '-' as i32
+                && *to_check as libc::c_int != '_' as i32
+                && *to_check as libc::c_int != '.' as i32
+                && *to_check as libc::c_int != '~' as i32
+            {
+                return true;
+            }
+            to_check = to_check.offset(1isize)
+        }
+    }
+
+    false
+}
+
+pub unsafe fn dc_encode_ext_header(to_encode: *const libc::c_char) -> *mut libc::c_char {
+    let mut pstr: *const libc::c_char = to_encode;
+    if to_encode.is_null() {
+        return dc_strdup(b"utf-8\'\'\x00" as *const u8 as *const libc::c_char);
+    }
+    let buf: *mut libc::c_char = malloc(
+        strlen(b"utf-8\'\'\x00" as *const u8 as *const libc::c_char)
+            .wrapping_add(strlen(to_encode).wrapping_mul(3))
+            .wrapping_add(1),
+    ) as *mut libc::c_char;
+    assert!(!buf.is_null());
+
+    let mut pbuf: *mut libc::c_char = buf;
+    strcpy(pbuf, b"utf-8\'\'\x00" as *const u8 as *const libc::c_char);
+    pbuf = pbuf.offset(strlen(pbuf) as isize);
+    while 0 != *pstr {
+        if 0 != isalnum(*pstr as libc::c_int)
+            || *pstr as libc::c_int == '-' as i32
+            || *pstr as libc::c_int == '_' as i32
+            || *pstr as libc::c_int == '.' as i32
+            || *pstr as libc::c_int == '~' as i32
+        {
+            let fresh20 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh20 = *pstr
+        } else {
+            let fresh21 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh21 = '%' as i32 as libc::c_char;
+            let fresh22 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh22 = int_2_uppercase_hex((*pstr as libc::c_int >> 4i32) as libc::c_char);
+            let fresh23 = pbuf;
+            pbuf = pbuf.offset(1);
+            *fresh23 = int_2_uppercase_hex((*pstr as libc::c_int & 15i32) as libc::c_char)
+        }
+        pstr = pstr.offset(1isize)
+    }
+    *pbuf = '\u{0}' as i32 as libc::c_char;
+
+    buf
+}
+
+pub unsafe fn dc_decode_ext_header(to_decode: *const libc::c_char) -> *mut libc::c_char {
+    let mut decoded: *mut libc::c_char = ptr::null_mut();
+    let mut charset: *mut libc::c_char = ptr::null_mut();
+    let mut p2: *const libc::c_char;
+    if !to_decode.is_null() {
+        // get char set
+        p2 = strchr(to_decode, '\'' as i32);
+        if !(p2.is_null() || p2 == to_decode) {
+            /*no empty charset allowed*/
+            charset =
+                dc_null_terminate(to_decode, p2.wrapping_offset_from(to_decode) as libc::c_int);
+            p2 = p2.offset(1isize);
+            // skip language
+            p2 = strchr(p2, '\'' as i32);
+            if !p2.is_null() {
+                p2 = p2.offset(1isize);
+                decoded = dc_urldecode(p2);
+                if !charset.is_null()
+                    && strcmp(charset, b"utf-8\x00" as *const u8 as *const libc::c_char) != 0i32
+                    && strcmp(charset, b"UTF-8\x00" as *const u8 as *const libc::c_char) != 0i32
+                {
+                    if let Some(encoding) =
+                        Charset::for_label(CStr::from_ptr(charset).to_str().unwrap().as_bytes())
+                    {
+                        let data =
+                            std::slice::from_raw_parts(decoded as *const u8, strlen(decoded));
+
+                        let (res, _, _) = encoding.decode(data);
+                        free(decoded as *mut _);
+                        let r = std::ffi::CString::new(res.as_bytes()).unwrap();
+                        decoded = dc_strdup(r.as_ptr());
+                    }
+                }
+            }
+        }
+    }
+    free(charset as *mut libc::c_void);
+    if !decoded.is_null() {
+        decoded
+    } else {
+        dc_strdup(to_decode)
+    }
 }

 unsafe fn print_hex(target: *mut libc::c_char, cur: *const libc::c_char) {
@@ -333,8 +672,16 @@ unsafe fn print_hex(target: *mut libc::c_char, cur: *const libc::c_char) {
 #[cfg(test)]
 mod tests {
    use super::*;
+    use percent_encoding::{percent_encode, NON_ALPHANUMERIC};
    use std::ffi::CStr;

+    #[test]
+    fn test_isalnum() {
+        assert_eq!(isalnum(0), 0);
+        assert_eq!(isalnum('5' as libc::c_int), 1);
+        assert_eq!(isalnum('Q' as libc::c_int), 1);
+    }
+
    #[test]
    fn test_dc_decode_header_words() {
        unsafe {
@@ -395,43 +742,99 @@ mod tests {

    #[test]
    fn test_dc_encode_ext_header() {
-        let buf1 = dc_encode_ext_header("Björn Petersen");
-        assert_eq!(&buf1, "utf-8\'\'Bj%C3%B6rn%20Petersen");
-        let buf2 = dc_decode_ext_header(buf1.as_bytes());
-        assert_eq!(&buf2, "Björn Petersen",);
+        unsafe {
+            let mut buf1 = dc_encode_ext_header(
+                b"Bj\xc3\xb6rn Petersen\x00" as *const u8 as *const libc::c_char,
+            );
+            assert_eq!(
+                CStr::from_ptr(buf1).to_str().unwrap(),
+                "utf-8\'\'Bj%C3%B6rn%20Petersen"
+            );
+            let buf2 = dc_decode_ext_header(buf1);
+            assert_eq!(
+                strcmp(
+                    buf2,
+                    b"Bj\xc3\xb6rn Petersen\x00" as *const u8 as *const libc::c_char,
+                ),
+                0
+            );
+            free(buf1 as *mut libc::c_void);
+            free(buf2 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"iso-8859-1\'en\'%A3%20rates");
-        assert_eq!(buf1, "£ rates",);
+            buf1 = dc_decode_ext_header(
+                b"iso-8859-1\'en\'%A3%20rates\x00" as *const u8 as *const libc::c_char,
+            );
+            assert_eq!(
+                strcmp(
+                    buf1,
+                    b"\xc2\xa3 rates\x00" as *const u8 as *const libc::c_char,
+                ),
+                0
+            );
+            free(buf1 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"wrong\'format");
-        assert_eq!(buf1, "wrong\'format",);
+            buf1 = dc_decode_ext_header(b"wrong\'format\x00" as *const u8 as *const libc::c_char);
+            assert_eq!(
+                strcmp(
+                    buf1,
+                    b"wrong\'format\x00" as *const u8 as *const libc::c_char,
+                ),
+                0
+            );
+            free(buf1 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"\'\'");
-        assert_eq!(buf1, "\'\'");
+            buf1 = dc_decode_ext_header(b"\'\'\x00" as *const u8 as *const libc::c_char);
+            assert_eq!(
+                strcmp(buf1, b"\'\'\x00" as *const u8 as *const libc::c_char),
+                0
+            );
+            free(buf1 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"x\'\'");
-        assert_eq!(buf1, "");
+            buf1 = dc_decode_ext_header(b"x\'\'\x00" as *const u8 as *const libc::c_char);
+            assert_eq!(strcmp(buf1, b"\x00" as *const u8 as *const libc::c_char), 0);
+            free(buf1 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"\'");
-        assert_eq!(buf1, "\'");
+            buf1 = dc_decode_ext_header(b"\'\x00" as *const u8 as *const libc::c_char);
+            assert_eq!(
+                strcmp(buf1, b"\'\x00" as *const u8 as *const libc::c_char),
+                0
+            );
+            free(buf1 as *mut libc::c_void);

-        let buf1 = dc_decode_ext_header(b"");
-        assert_eq!(buf1, "");
-
-        // regressions
-        assert_eq!(
-            dc_decode_ext_header(dc_encode_ext_header("%0A").as_bytes()),
-            "%0A"
-        );
+            buf1 = dc_decode_ext_header(b"\x00" as *const u8 as *const libc::c_char);
+            assert_eq!(strcmp(buf1, b"\x00" as *const u8 as *const libc::c_char), 0);
+            free(buf1 as *mut libc::c_void);
+        }
    }

    #[test]
    fn test_dc_needs_ext_header() {
-        assert_eq!(dc_needs_ext_header("Björn"), true);
-        assert_eq!(dc_needs_ext_header("Bjoern"), false);
-        assert_eq!(dc_needs_ext_header(""), false);
-        assert_eq!(dc_needs_ext_header(" "), true);
-        assert_eq!(dc_needs_ext_header("a b"), true);
+        unsafe {
+            assert_eq!(
+                dc_needs_ext_header(b"Bj\xc3\xb6rn\x00" as *const u8 as *const libc::c_char),
+                true
+            );
+            assert_eq!(
+                dc_needs_ext_header(b"Bjoern\x00" as *const u8 as *const libc::c_char),
+                false
+            );
+            assert_eq!(
+                dc_needs_ext_header(b"\x00" as *const u8 as *const libc::c_char),
+                false
+            );
+            assert_eq!(
+                dc_needs_ext_header(b" \x00" as *const u8 as *const libc::c_char),
+                true
+            );
+            assert_eq!(
+                dc_needs_ext_header(b"a b\x00" as *const u8 as *const libc::c_char),
+                true
+            );
+            assert_eq!(
+                dc_needs_ext_header(0 as *const u8 as *const libc::c_char),
+                false
+            );
+        }
    }

    #[test]
@@ -446,20 +849,69 @@ mod tests {
        assert_eq!(to_string(hex.as_ptr() as *const _), "=3A");
    }

-    use proptest::prelude::*;
+    #[test]
+    fn test_dc_urlencode_urldecode() {
+        unsafe {
+            let buf1 = percent_encode(b"Bj\xc3\xb6rn Petersen", NON_ALPHANUMERIC)
+                .to_string()
+                .strdup();

-    proptest! {
-        #[test]
-        fn test_ext_header_roundtrip(buf: String) {
-            let encoded = dc_encode_ext_header(&buf);
-            let decoded = dc_decode_ext_header(encoded.as_bytes());
-            assert_eq!(buf, decoded);
-        }
+            assert_eq!(
+                CStr::from_ptr(buf1 as *const libc::c_char)
+                    .to_str()
+                    .unwrap(),
+                "Bj%C3%B6rn%20Petersen"
+            );

-        #[test]
-        fn test_ext_header_decode_anything(buf: Vec<u8>) {
-            // make sure this never panics
-            let _decoded = dc_decode_ext_header(&buf);
+            let buf2 = dc_urldecode(buf1);
+
+            assert_eq!(
+                strcmp(
+                    buf2,
+                    b"Bj\xc3\xb6rn Petersen\x00" as *const u8 as *const libc::c_char
+                ),
+                0
+            );
+
+            free(buf1 as *mut libc::c_void);
+            free(buf2 as *mut libc::c_void);
        }
    }
+
+    #[test]
+    fn test_dc_encode_decode_modified_utf7() {
+        unsafe {
+            let buf1 = dc_encode_modified_utf7(
+                b"Bj\xc3\xb6rn Petersen\x00" as *const u8 as *const libc::c_char,
+                1,
+            );
+
+            assert_eq!(
+                CStr::from_ptr(buf1 as *const libc::c_char)
+                    .to_str()
+                    .unwrap(),
+                "Bj&APY-rn_Petersen"
+            );
+
+            let buf2 = dc_decode_modified_utf7(buf1, 1);
+
+            assert_eq!(
+                strcmp(
+                    buf2,
+                    b"Bj\xc3\xb6rn Petersen\x00" as *const u8 as *const libc::c_char
+                ),
+                0
+            );
+
+            free(buf1 as *mut libc::c_void);
+            free(buf2 as *mut libc::c_void);
+        }
+    }
+    #[test]
+    fn test_hex_to_int() {
+        assert_eq!(hex_2_int(b'A' as libc::c_char), 10);
+        assert_eq!(hex_2_int(b'a' as libc::c_char), 10);
+        assert_eq!(hex_2_int(b'4' as libc::c_char), 4);
+        assert_eq!(hex_2_int(b'K' as libc::c_char), 20);
+    }
 }
--- a/src/dc_token.rs
+++ b/src/dc_token.rs
@@ -0,0 +1,56 @@
+use crate::context::Context;
+use crate::dc_tools::*;
+use crate::sql;
+
+// Token namespaces
+#[allow(non_camel_case_types)]
+type dc_tokennamespc_t = usize;
+pub const DC_TOKEN_AUTH: dc_tokennamespc_t = 110;
+pub const DC_TOKEN_INVITENUMBER: dc_tokennamespc_t = 100;
+
+// Functions to read/write token from/to the database. A token is any string associated with a key.
+
+pub fn dc_token_save(context: &Context, namespc: dc_tokennamespc_t, foreign_id: u32) -> String {
+    // foreign_id may be 0
+    let token = dc_create_id();
+    sql::execute(
+        context,
+        &context.sql,
+        "INSERT INTO tokens (namespc, foreign_id, token, timestamp) VALUES (?, ?, ?, ?);",
+        params![namespc as i32, foreign_id as i32, &token, time()],
+    )
+    .ok();
+    token
+}
+
+pub fn dc_token_lookup(
+    context: &Context,
+    namespc: dc_tokennamespc_t,
+    foreign_id: u32,
+) -> Option<String> {
+    context.sql.query_row_col::<_, String>(
+        context,
+        "SELECT token FROM tokens WHERE namespc=? AND foreign_id=?;",
+        params![namespc as i32, foreign_id as i32],
+        0,
+    )
+}
+
+pub fn dc_token_lookup_or_new(
+    context: &Context,
+    namespc: dc_tokennamespc_t,
+    foreign_id: u32,
+) -> String {
+    dc_token_lookup(context, namespc, foreign_id)
+        .unwrap_or_else(|| dc_token_save(context, namespc, foreign_id))
+}
+
+pub fn dc_token_exists(context: &Context, namespc: dc_tokennamespc_t, token: &str) -> bool {
+    context
+        .sql
+        .exists(
+            "SELECT id FROM tokens WHERE namespc=? AND token=?;",
+            params![namespc as i32, token],
+        )
+        .unwrap_or_default()
+}
--- a/src/dc_tools.rs
+++ b/src/dc_tools.rs
@@ -6,16 +6,16 @@ use std::time::SystemTime;
 use std::{fmt, fs, ptr};

 use chrono::{Local, TimeZone};
-use itertools::max;
-use libc::uintptr_t;
-use mmime::clist::*;
 use mmime::mailimf_types::*;
 use rand::{thread_rng, Rng};

 use crate::context::Context;
 use crate::error::Error;
+use crate::types::*;
 use crate::x::*;

+use itertools::max;
+
 /* Some tools and enhancements to the used libraries, there should be
 no references to Context and other "larger" classes here. */
 /* ** library-private **********************************************************/
@@ -98,7 +98,7 @@ pub unsafe fn dc_str_replace(
 }

 unsafe fn dc_ltrim(buf: *mut libc::c_char) {
-    let mut len: libc::size_t;
+    let mut len: size_t;
    let mut cur: *const libc::c_uchar;
    if !buf.is_null() && 0 != *buf as libc::c_int {
        len = strlen(buf);
@@ -118,7 +118,7 @@ unsafe fn dc_ltrim(buf: *mut libc::c_char) {
 }

 unsafe fn dc_rtrim(buf: *mut libc::c_char) {
-    let mut len: libc::size_t;
+    let mut len: size_t;
    let mut cur: *mut libc::c_uchar;
    if !buf.is_null() && 0 != *buf as libc::c_int {
        len = strlen(buf);
@@ -261,18 +261,11 @@ pub unsafe fn dc_replace_bad_utf8_chars(buf: *mut libc::c_char) {
 pub fn dc_truncate(buf: &str, approx_chars: usize, do_unwrap: bool) -> Cow<str> {
    let ellipse = if do_unwrap { "..." } else { "[...]" };

-    let count = buf.chars().count();
-    if approx_chars > 0 && count > approx_chars + ellipse.len() {
-        let end_pos = buf
-            .char_indices()
-            .nth(approx_chars)
-            .map(|(n, _)| n)
-            .unwrap_or_default();
-
-        if let Some(index) = buf[..end_pos].rfind(|c| c == ' ' || c == '\n') {
+    if approx_chars > 0 && buf.len() > approx_chars + ellipse.len() {
+        if let Some(index) = buf[..approx_chars].rfind(|c| c == ' ' || c == '\n') {
            Cow::Owned(format!("{}{}", &buf[..index + 1], ellipse))
        } else {
-            Cow::Owned(format!("{}{}", &buf[..end_pos], ellipse))
+            Cow::Owned(format!("{}{}", &buf[..approx_chars], ellipse))
        }
    } else {
        Cow::Borrowed(buf)
@@ -301,9 +294,9 @@ pub unsafe fn dc_truncate_n_unwrap_str(
        if *p1 as libc::c_int > ' ' as i32 {
            lastIsCharacter = 1
        } else if 0 != lastIsCharacter {
-            let used_bytes = (p1 as uintptr_t).wrapping_sub(buf as uintptr_t) as libc::size_t;
+            let used_bytes: size_t = (p1 as uintptr_t).wrapping_sub(buf as uintptr_t) as size_t;
            if dc_utf8_strnlen(buf, used_bytes) >= approx_characters as usize {
-                let buf_bytes = strlen(buf);
+                let buf_bytes: size_t = strlen(buf);
                if buf_bytes.wrapping_sub(used_bytes) >= strlen(ellipse_utf8) {
                    strcpy(p1 as *mut libc::c_char, ellipse_utf8);
                }
@@ -324,12 +317,12 @@ pub unsafe fn dc_truncate_n_unwrap_str(
    };
 }

-unsafe fn dc_utf8_strnlen(s: *const libc::c_char, n: libc::size_t) -> libc::size_t {
+unsafe fn dc_utf8_strnlen(s: *const libc::c_char, n: size_t) -> size_t {
    if s.is_null() {
        return 0;
    }

-    let mut j: libc::size_t = 0;
+    let mut j: size_t = 0;
    for i in 0..n {
        if *s.add(i) as libc::c_int & 0xc0 != 0x80 {
            j = j.wrapping_add(1)
@@ -442,10 +435,21 @@ pub unsafe fn clist_free_content(haystack: *const clist) {
 pub unsafe fn clist_search_string_nocase(
    haystack: *const clist,
    needle: *const libc::c_char,
-) -> bool {
-    (&*haystack)
-        .into_iter()
-        .any(|data| strcasecmp(data.cast(), needle) == 0)
+) -> libc::c_int {
+    let mut iter = (*haystack).first;
+
+    while !iter.is_null() {
+        if strcasecmp((*iter).data as *const libc::c_char, needle) == 0 {
+            return 1;
+        }
+        iter = if !iter.is_null() {
+            (*iter).next
+        } else {
+            ptr::null_mut()
+        }
+    }
+
+    0
 }

 /* date/time tools */
@@ -543,7 +547,7 @@ pub fn dc_create_id() -> String {
    - the group-id should be a string with the characters [a-zA-Z0-9\-_] */

    let mut rng = thread_rng();
-    let buf: [u32; 3] = [rng.gen(), rng.gen(), rng.gen()];
+    let buf: [uint32_t; 3] = [rng.gen(), rng.gen(), rng.gen()];

    encode_66bits_as_base64(buf[0usize], buf[1usize], buf[2usize])
 }
@@ -626,21 +630,6 @@ pub unsafe fn dc_create_outgoing_rfc724_mid(
    ret
 }

-/// Generate globally-unique message-id for a new outgoing message.
-///
-/// Note: Do not add a counter or any private data as as this may give
-/// unneeded information to the receiver
-pub fn dc_create_outgoing_rfc724_mid_safe(grpid: Option<&str>, from_addr: &str) -> String {
-    let hostname = from_addr
-        .find('@')
-        .map(|k| &from_addr[k..])
-        .unwrap_or("@nohost");
-    match grpid {
-        Some(grpid) => format!("Gr.{}.{}{}", grpid, dc_create_id(), hostname),
-        None => format!("Mr.{}.{}{}", dc_create_id(), dc_create_id(), hostname),
-    }
-}
-
 /// Extract the group id (grpid) from a message id (mid)
 ///
 /// # Arguments
@@ -792,45 +781,67 @@ pub fn dc_get_filemeta(buf: &[u8]) -> Result<(u32, u32), Error> {
 ///
 /// If `path` starts with "$BLOBDIR", replaces it with the blobdir path.
 /// Otherwise, returns path as is.
-pub fn dc_get_abs_path<P: AsRef<std::path::Path>>(
+pub fn dc_get_abs_path_safe<P: AsRef<std::path::Path>>(
    context: &Context,
    path: P,
 ) -> std::path::PathBuf {
    let p: &std::path::Path = path.as_ref();
    if let Ok(p) = p.strip_prefix("$BLOBDIR") {
-        context.get_blobdir().join(p)
+        assert!(
+            context.has_blobdir(),
+            "Expected context to have blobdir to substitute $BLOBDIR",
+        );
+        std::path::PathBuf::from(as_str(context.get_blobdir())).join(p)
    } else {
        p.into()
    }
 }

-pub fn dc_file_exist(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
-    dc_get_abs_path(context, &path).exists()
+pub unsafe fn dc_get_abs_path(
+    context: &Context,
+    path_filename: impl AsRef<str>,
+) -> *mut libc::c_char {
+    let starts = path_filename.as_ref().starts_with("$BLOBDIR");
+
+    if starts && !context.has_blobdir() {
+        return ptr::null_mut();
+    }
+
+    let mut path_filename_abs = path_filename.as_ref().strdup();
+    if starts && context.has_blobdir() {
+        dc_str_replace(
+            &mut path_filename_abs,
+            b"$BLOBDIR\x00" as *const u8 as *const libc::c_char,
+            context.get_blobdir(),
+        );
+    }
+    path_filename_abs
 }

-pub fn dc_get_filebytes(context: &Context, path: impl AsRef<std::path::Path>) -> u64 {
-    let path_abs = dc_get_abs_path(context, &path);
+pub fn dc_file_exist(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
+    dc_get_abs_path_safe(context, &path).exists()
+}
+
+pub fn dc_get_filebytes(context: &Context, path: impl AsRef<std::path::Path>) -> uint64_t {
+    let path_abs = dc_get_abs_path_safe(context, &path);
    match fs::metadata(&path_abs) {
-        Ok(meta) => meta.len() as u64,
+        Ok(meta) => meta.len() as uint64_t,
        Err(_err) => 0,
    }
 }

 pub fn dc_delete_file(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
-    let path_abs = dc_get_abs_path(context, &path);
-    if !path_abs.is_file() {
-        warn!(
-            context,
-            "Will not delete directory \"{}\".",
-            path.as_ref().display()
-        );
-        return false;
-    }
+    let path_abs = dc_get_abs_path_safe(context, &path);
+    let res = if path_abs.is_file() {
+        fs::remove_file(path_abs)
+    } else {
+        fs::remove_dir_all(path_abs)
+    };

-    match fs::remove_file(path_abs) {
+    match res {
        Ok(_) => true,
        Err(_err) => {
-            warn!(context, "Cannot delete \"{}\".", path.as_ref().display());
+            warn!(context, 0, "Cannot delete \"{}\".", path.as_ref().display());
            false
        }
    }
@@ -841,13 +852,14 @@ pub fn dc_copy_file(
    src: impl AsRef<std::path::Path>,
    dest: impl AsRef<std::path::Path>,
 ) -> bool {
-    let src_abs = dc_get_abs_path(context, &src);
-    let dest_abs = dc_get_abs_path(context, &dest);
+    let src_abs = dc_get_abs_path_safe(context, &src);
+    let dest_abs = dc_get_abs_path_safe(context, &dest);
    match fs::copy(&src_abs, &dest_abs) {
        Ok(_) => true,
        Err(_) => {
            error!(
                context,
+                0,
                "Cannot copy \"{}\" to \"{}\".",
                src.as_ref().display(),
                dest.as_ref().display(),
@@ -858,13 +870,14 @@ pub fn dc_copy_file(
 }

 pub fn dc_create_folder(context: &Context, path: impl AsRef<std::path::Path>) -> bool {
-    let path_abs = dc_get_abs_path(context, &path);
+    let path_abs = dc_get_abs_path_safe(context, &path);
    if !path_abs.exists() {
        match fs::create_dir_all(path_abs) {
            Ok(_) => true,
            Err(_err) => {
                warn!(
                    context,
+                    0,
                    "Cannot create directory \"{}\".",
                    path.as_ref().display(),
                );
@@ -881,7 +894,7 @@ pub unsafe fn dc_write_file(
    context: &Context,
    pathNfilename: *const libc::c_char,
    buf: *const libc::c_void,
-    buf_bytes: libc::size_t,
+    buf_bytes: size_t,
 ) -> libc::c_int {
    let bytes = std::slice::from_raw_parts(buf as *const u8, buf_bytes);

@@ -893,10 +906,11 @@ pub fn dc_write_file_safe<P: AsRef<std::path::Path>>(
    path: P,
    buf: &[u8],
 ) -> bool {
-    let path_abs = dc_get_abs_path(context, &path);
+    let path_abs = dc_get_abs_path_safe(context, &path);
    if let Err(_err) = fs::write(&path_abs, buf) {
        warn!(
            context,
+            0,
            "Cannot write {} bytes to \"{}\".",
            buf.len(),
            path.as_ref().display(),
@@ -912,7 +926,7 @@ pub unsafe fn dc_read_file(
    context: &Context,
    pathNfilename: *const libc::c_char,
    buf: *mut *mut libc::c_void,
-    buf_bytes: *mut libc::size_t,
+    buf_bytes: *mut size_t,
 ) -> libc::c_int {
    if pathNfilename.is_null() {
        return 0;
@@ -928,12 +942,13 @@ pub unsafe fn dc_read_file(
 }

 pub fn dc_read_file_safe<P: AsRef<std::path::Path>>(context: &Context, path: P) -> Option<Vec<u8>> {
-    let path_abs = dc_get_abs_path(context, &path);
+    let path_abs = dc_get_abs_path_safe(context, &path);
    match fs::read(&path_abs) {
        Ok(bytes) => Some(bytes),
        Err(_err) => {
            warn!(
                context,
+                0,
                "Cannot read \"{}\" or file is empty.",
                path.as_ref().display()
            );
@@ -997,22 +1012,13 @@ pub unsafe fn dc_get_fine_pathNfilename(
 }

 pub fn dc_is_blobdir_path(context: &Context, path: impl AsRef<str>) -> bool {
-    context
-        .get_blobdir()
-        .to_str()
-        .map(|s| path.as_ref().starts_with(s))
-        .unwrap_or_default()
+    path.as_ref().starts_with(as_str(context.get_blobdir()))
        || path.as_ref().starts_with("$BLOBDIR")
 }

 fn dc_make_rel_path(context: &Context, path: &mut String) {
-    if context
-        .get_blobdir()
-        .to_str()
-        .map(|s| path.starts_with(s))
-        .unwrap_or_default()
-    {
-        *path = path.replace("$BLOBDIR", context.get_blobdir().to_str().unwrap());
+    if path.starts_with(as_str(context.get_blobdir())) {
+        *path = path.replace("$BLOBDIR", as_str(context.get_blobdir()));
    }
 }

@@ -1523,36 +1529,6 @@ mod tests {
        assert_eq!(dc_truncate("123456", 4, true), "123456");
    }

-    #[test]
-    fn test_dc_truncate_edge() {
-        assert_eq!(dc_truncate("", 4, false), "");
-        assert_eq!(dc_truncate("", 4, true), "");
-
-        assert_eq!(dc_truncate("\n  hello \n world", 4, false), "\n  [...]");
-        assert_eq!(dc_truncate("\n  hello \n world", 4, true), "\n  ...");
-
-        assert_eq!(
-            dc_truncate("𐠈0Aᝮa𫝀®!ꫛa¡0A𐢧00𐹠®A  丽ⷐએ", 1, false),
-            "𐠈[...]"
-        );
-        assert_eq!(
-            dc_truncate("𐠈0Aᝮa𫝀®!ꫛa¡0A𐢧00𐹠®A  丽ⷐએ", 0, false),
-            "𐠈0Aᝮa𫝀®!ꫛa¡0A𐢧00𐹠®A  丽ⷐએ"
-        );
-
-        // 9 characters, so no truncation
-        assert_eq!(
-            dc_truncate("𑒀ὐ￠🜀\u{1e01b}A a🟠", 6, false),
-            "𑒀ὐ￠🜀\u{1e01b}A a🟠",
-        );
-
-        // 12 characters, truncation
-        assert_eq!(
-            dc_truncate("𑒀ὐ￠🜀\u{1e01b}A a🟠bcd", 6, false),
-            "𑒀ὐ￠🜀\u{1e01b}A[...]",
-        );
-    }
-
    #[test]
    fn test_dc_null_terminate_1() {
        unsafe {
@@ -1890,37 +1866,4 @@ mod tests {
        assert_eq!(EmailAddress::new("u@.tt").is_ok(), false);
        assert_eq!(EmailAddress::new("@d.tt").is_ok(), false);
    }
-
-    use proptest::prelude::*;
-
-    proptest! {
-        #[test]
-        fn test_dc_truncate(
-            buf: String,
-            approx_chars in 0..10000usize,
-            do_unwrap: bool,
-        ) {
-            let res = dc_truncate(&buf, approx_chars, do_unwrap);
-            let el_len = if do_unwrap { 3 } else { 5 };
-            let l = res.chars().count();
-            if approx_chars > 0 {
-                assert!(
-                    l <= approx_chars + el_len,
-                    "buf: '{}' - res: '{}' - len {}, approx {}",
-                    &buf, &res, res.len(), approx_chars
-                );
-            } else {
-                assert_eq!(&res, &buf);
-            }
-
-            if approx_chars > 0 && buf.chars().count() > approx_chars + el_len {
-                let l = res.len();
-                if do_unwrap {
-                    assert_eq!(&res[l-3..l], "...", "missing ellipsis in {}", &res);
-                } else {
-                    assert_eq!(&res[l-5..l], "[...]", "missing ellipsis in {}", &res);
-                }
-            }
-        }
-    }
 }
--- a/src/e2ee.rs
+++ b/src/e2ee.rs
@@ -30,9 +30,10 @@ use crate::keyring::*;
 use crate::peerstate::*;
 use crate::pgp::*;
 use crate::securejoin::handle_degrade_event;
+use crate::types::*;
 use crate::x::*;

-#[derive(Debug, Default)]
+#[derive(Default)]
 pub struct E2eeHelper {
    pub encryption_successfull: bool,
    cdata_to_free: Option<Box<dyn Any>>,
@@ -86,11 +87,11 @@ impl E2eeHelper {
                EncryptPreference::NoPreference
            };

-            let addr = context.get_config(Config::ConfiguredAddr);
+            let addr = context.sql.get_config(context, "configured_addr");

            if let Some(addr) = addr {
                let pubkey_ret = load_or_generate_self_public_key(context, &addr).map_err(|err| {
-                    error!(context, "Failed to load public key: {}", err);
+                    error!(context, 0, "Failed to load public key: {}", err);
                    err
                });
                if let Ok(public_key) = pubkey_ret {
@@ -112,7 +113,7 @@ impl E2eeHelper {
                                    let peerstate = peerstate.unwrap();
                                    info!(
                                        context,
-                                        "dc_e2ee_encrypt {} has peerstate", recipient_addr
+                                        0, "dc_e2ee_encrypt {} has peerstate", recipient_addr
                                    );
                                    if let Some(key) = peerstate.peek_key(min_verified as usize) {
                                        keyring.add_owned(key.clone());
@@ -121,6 +122,7 @@ impl E2eeHelper {
                                } else {
                                    info!(
                                        context,
+                                        0,
                                        "dc_e2ee_encrypt {} HAS NO peerstate {}",
                                        recipient_addr,
                                        peerstate.is_some()
@@ -165,7 +167,7 @@ impl E2eeHelper {
                            let message_to_encrypt: *mut mailmime = mailmime_new(
                                MAILMIME_MESSAGE as libc::c_int,
                                ptr::null(),
-                                0 as libc::size_t,
+                                0i32 as size_t,
                                mailmime_fields_new_empty(),
                                mailmime_get_content_message(),
                                ptr::null_mut(),
@@ -297,10 +299,8 @@ impl E2eeHelper {
                                ok_to_continue = false;
                            } else {
                                if let Some(ctext_v) = dc_pgp_pk_encrypt(
-                                    std::slice::from_raw_parts(
-                                        (*plain).str_0 as *const u8,
-                                        (*plain).len,
-                                    ),
+                                    (*plain).str_0 as *const libc::c_void,
+                                    (*plain).len,
                                    &keyring,
                                    sign_key.as_ref(),
                                ) {
@@ -311,7 +311,7 @@ impl E2eeHelper {
                                    /* create MIME-structure that will contain the encrypted text */
                                    let mut encrypted_part: *mut mailmime = new_data_part(
                                        ptr::null_mut(),
-                                        0 as libc::size_t,
+                                        0i32 as size_t,
                                        b"multipart/encrypted\x00" as *const u8
                                            as *const libc::c_char
                                            as *mut libc::c_char,
@@ -386,17 +386,16 @@ impl E2eeHelper {
        /*just a pointer into mailmime structure, must not be freed*/
        let imffields: *mut mailimf_fields = mailmime_find_mailimf_fields(in_out_message);
        let mut message_time = 0;
-        let mut from = None;
+        let mut from: *mut libc::c_char = ptr::null_mut();
        let mut private_keyring = Keyring::default();
        let mut public_keyring_for_validate = Keyring::default();
        let mut gossip_headers: *mut mailimf_fields = ptr::null_mut();
        if !(in_out_message.is_null() || imffields.is_null()) {
-            let mut field = mailimf_find_field(imffields, MAILIMF_FIELD_FROM as libc::c_int);
-
+            let mut field: *mut mailimf_field =
+                mailimf_find_field(imffields, MAILIMF_FIELD_FROM as libc::c_int);
            if !field.is_null() && !(*field).fld_data.fld_from.is_null() {
                from = mailimf_find_first_addr((*(*field).fld_data.fld_from).frm_mb_list)
            }
-
            field = mailimf_find_field(imffields, MAILIMF_FIELD_ORIG_DATE as libc::c_int);
            if !field.is_null() && !(*field).fld_data.fld_orig_date.is_null() {
                let orig_date: *mut mailimf_orig_date = (*field).fld_data.fld_orig_date;
@@ -408,32 +407,28 @@ impl E2eeHelper {
                }
            }
            let mut peerstate = None;
-            let autocryptheader = from
-                .as_ref()
-                .and_then(|from| Aheader::from_imffields(from, imffields));
-            if message_time > 0 {
-                if let Some(ref from) = from {
-                    peerstate = Peerstate::from_addr(context, &context.sql, from);
+            let autocryptheader = Aheader::from_imffields(from, imffields);
+            if message_time > 0 && !from.is_null() {
+                peerstate = Peerstate::from_addr(context, &context.sql, as_str(from));

-                    if let Some(ref mut peerstate) = peerstate {
-                        if let Some(ref header) = autocryptheader {
-                            peerstate.apply_header(&header, message_time);
-                            peerstate.save_to_db(&context.sql, false);
-                        } else if message_time > peerstate.last_seen_autocrypt
-                            && !contains_report(in_out_message)
-                        {
-                            peerstate.degrade_encryption(message_time);
-                            peerstate.save_to_db(&context.sql, false);
-                        }
-                    } else if let Some(ref header) = autocryptheader {
-                        let p = Peerstate::from_header(context, header, message_time);
-                        assert!(p.save_to_db(&context.sql, true));
-                        peerstate = Some(p);
+                if let Some(ref mut peerstate) = peerstate {
+                    if let Some(ref header) = autocryptheader {
+                        peerstate.apply_header(&header, message_time);
+                        peerstate.save_to_db(&context.sql, false);
+                    } else if message_time > peerstate.last_seen_autocrypt
+                        && !contains_report(in_out_message)
+                    {
+                        peerstate.degrade_encryption(message_time);
+                        peerstate.save_to_db(&context.sql, false);
                    }
+                } else if let Some(ref header) = autocryptheader {
+                    let p = Peerstate::from_header(context, header, message_time);
+                    assert!(p.save_to_db(&context.sql, true));
+                    peerstate = Some(p);
                }
            }
            /* load private key for decryption */
-            let self_addr = context.get_config(Config::ConfiguredAddr);
+            let self_addr = context.sql.get_config(context, "configured_addr");
            if let Some(self_addr) = self_addr {
                if private_keyring.load_self_private_for_decrypting(
                    context,
@@ -441,8 +436,7 @@ impl E2eeHelper {
                    &context.sql,
                ) {
                    if peerstate.as_ref().map(|p| p.last_seen).unwrap_or_else(|| 0) == 0 {
-                        peerstate =
-                            Peerstate::from_addr(&context, &context.sql, &from.unwrap_or_default());
+                        peerstate = Peerstate::from_addr(&context, &context.sql, as_str(from));
                    }
                    if let Some(ref peerstate) = peerstate {
                        if peerstate.degrade_event.is_some() {
@@ -491,12 +485,14 @@ impl E2eeHelper {
        if !gossip_headers.is_null() {
            mailimf_fields_free(gossip_headers);
        }
+
+        free(from as *mut libc::c_void);
    }
 }

 unsafe fn new_data_part(
    data: *mut libc::c_void,
-    data_bytes: libc::size_t,
+    data_bytes: size_t,
    default_content_type: *mut libc::c_char,
    default_encoding: libc::c_int,
 ) -> *mut mailmime {
@@ -610,7 +606,7 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
    let start = std::time::Instant::now();
    info!(
        context,
-        "Generating keypair with {} bits, e={} ...", 2048, 65537,
+        0, "Generating keypair with {} bits, e={} ...", 2048, 65537,
    );
    match dc_pgp_create_keypair(&self_addr) {
        Some((public_key, private_key)) => {
@@ -625,6 +621,7 @@ fn load_or_generate_self_public_key(context: &Context, self_addr: impl AsRef<str
                true => {
                    info!(
                        context,
+                        0,
                        "Keypair generated in {:.3}s.",
                        start.elapsed().as_secs()
                    );
@@ -692,6 +689,7 @@ unsafe fn update_gossip_peerstates(
                    } else {
                        info!(
                            context,
+                            0,
                            "Ignoring gossipped \"{}\" as the address is not in To/Cc list.",
                            &header.addr,
                        );
@@ -747,7 +745,7 @@ unsafe fn decrypt_recursive(
                    &mut decrypted_mime,
                ) {
                    if (*ret_gossip_headers).is_null() && ret_valid_signatures.len() > 0 {
-                        let mut dummy: libc::size_t = 0i32 as libc::size_t;
+                        let mut dummy: size_t = 0i32 as size_t;
                        let mut test: *mut mailimf_fields = ptr::null_mut();
                        if mailimf_envelope_and_optional_fields_parse(
                            (*decrypted_mime).mm_mime_start,
@@ -834,7 +832,7 @@ unsafe fn decrypt_part(
    let mut transfer_decoding_buffer: *mut libc::c_char = ptr::null_mut();
    /* must not be free()'d */
    let mut decoded_data: *const libc::c_char = ptr::null_mut();
-    let mut decoded_data_bytes: libc::size_t = 0;
+    let mut decoded_data_bytes: size_t = 0i32 as size_t;
    let mut sth_decrypted = false;

    *ret_decrypted_mime = ptr::null_mut();
@@ -880,7 +878,7 @@ unsafe fn decrypt_part(
            }
        } else {
            let r: libc::c_int;
-            let mut current_index: libc::size_t = 0;
+            let mut current_index: size_t = 0i32 as size_t;
            r = mailmime_part_parse(
                (*mime_data).dt_data.dt_text.dt_data,
                (*mime_data).dt_data.dt_text.dt_length,
@@ -909,7 +907,8 @@ unsafe fn decrypt_part(

                /*if we already have fingerprints, do not add more; this ensures, only the fingerprints from the outer-most part are collected */
                if let Some(plain) = dc_pgp_pk_decrypt(
-                    std::slice::from_raw_parts(decoded_data as *const u8, decoded_data_bytes),
+                    decoded_data as *const libc::c_void,
+                    decoded_data_bytes,
                    &private_keyring,
                    &public_keyring_for_validate,
                    add_signatures,
@@ -917,7 +916,7 @@ unsafe fn decrypt_part(
                    let plain_bytes = plain.len();
                    let plain_buf = plain.as_ptr() as *const libc::c_char;

-                    let mut index: libc::size_t = 0;
+                    let mut index: size_t = 0i32 as size_t;
                    let mut decrypted_mime: *mut mailmime = ptr::null_mut();
                    if mailmime_parse(
                        plain_buf as *const _,
@@ -1095,12 +1094,15 @@ Sent with my Delta Chat Messenger: https://delta.chat";
            let mut decoded_data_bytes = 0;
            let mut transfer_decoding_buffer: *mut libc::c_char = ptr::null_mut();

-            assert!(mailmime_transfer_decode(
-                msg1,
-                &mut decoded_data,
-                &mut decoded_data_bytes,
-                &mut transfer_decoding_buffer,
-            ));
+            assert_eq!(
+                mailmime_transfer_decode(
+                    msg1,
+                    &mut decoded_data,
+                    &mut decoded_data_bytes,
+                    &mut transfer_decoding_buffer,
+                ),
+                1
+            );
            println!(
                "{:?}",
                String::from_utf8_lossy(std::slice::from_raw_parts(
--- a/src/error.rs
+++ b/src/error.rs
@@ -22,8 +22,6 @@ pub enum Error {
    Image(image_meta::ImageError),
    #[fail(display = "{:?}", _0)]
    Utf8(std::str::Utf8Error),
-    #[fail(display = "{:?}", _0)]
-    CStringError(crate::dc_tools::CStringError),
 }

 pub type Result<T> = std::result::Result<T, Error>;
@@ -64,12 +62,6 @@ impl From<image_meta::ImageError> for Error {
    }
 }

-impl From<crate::dc_tools::CStringError> for Error {
-    fn from(err: crate::dc_tools::CStringError) -> Error {
-        Error::CStringError(err)
-    }
-}
-
 #[macro_export]
 macro_rules! bail {
    ($e:expr) => {
--- a/src/events.rs
+++ b/src/events.rs
@@ -1,229 +0,0 @@
-use std::path::PathBuf;
-
-use strum::EnumProperty;
-
-use crate::stock::StockMessage;
-
-impl Event {
-    /// Returns the corresponding Event id.
-    pub fn as_id(&self) -> i32 {
-        self.get_str("id")
-            .expect("missing id")
-            .parse()
-            .expect("invalid id")
-    }
-}
-
-#[derive(Debug, Clone, PartialEq, Eq, EnumProperty)]
-pub enum Event {
-    /// The library-user may write an informational string to the log.
-    /// Passed to the callback given to dc_context_new().
-    /// This event should not be reported to the end-user using a popup or something like that.
-    ///
-    /// @return 0
-    #[strum(props(id = "100"))]
-    Info(String),
-
-    /// Emitted when SMTP connection is established and login was successful.
-    ///
-    /// @return 0
-    #[strum(props(id = "101"))]
-    SmtpConnected(String),
-
-    /// Emitted when IMAP connection is established and login was successful.
-    ///
-    /// @return 0
-    #[strum(props(id = "102"))]
-    ImapConnected(String),
-
-    /// Emitted when a message was successfully sent to the SMTP server.
-    ///
-    /// @return 0
-    #[strum(props(id = "103"))]
-    SmtpMessageSent(String),
-
-    /// The library-user should write a warning string to the log.
-    /// Passed to the callback given to dc_context_new().
-    ///
-    /// This event should not be reported to the end-user using a popup or something like that.
-    ///
-    /// @return 0
-    #[strum(props(id = "300"))]
-    Warning(String),
-
-    /// The library-user should report an error to the end-user.
-    /// Passed to the callback given to dc_context_new().
-    ///
-    /// As most things are asynchronous, things may go wrong at any time and the user
-    /// should not be disturbed by a dialog or so.  Instead, use a bubble or so.
-    ///
-    /// However, for ongoing processes (eg. configure())
-    /// or for functions that are expected to fail (eg. dc_continue_key_transfer())
-    /// it might be better to delay showing these events until the function has really
-    /// failed (returned false). It should be sufficient to report only the _last_ error
-    /// in a messasge box then.
-    ///
-    /// @return
-    #[strum(props(id = "400"))]
-    Error(String),
-
-    /// An action cannot be performed because there is no network available.
-    ///
-    /// The library will typically try over after a some time
-    /// and when dc_maybe_network() is called.
-    ///
-    /// Network errors should be reported to users in a non-disturbing way,
-    /// however, as network errors may come in a sequence,
-    /// it is not useful to raise each an every error to the user.
-    /// For this purpose, data1 is set to 1 if the error is probably worth reporting.
-    ///
-    /// Moreover, if the UI detects that the device is offline,
-    /// it is probably more useful to report this to the user
-    /// instead of the string from data2.
-    ///
-    /// @return 0
-    #[strum(props(id = "401"))]
-    ErrorNetwork(String),
-
-    /// An action cannot be performed because the user is not in the group.
-    /// Reported eg. after a call to
-    /// dc_set_chat_name(), dc_set_chat_profile_image(),
-    /// dc_add_contact_to_chat(), dc_remove_contact_from_chat(),
-    /// dc_send_text_msg() or another sending function.
-    ///
-    /// @return 0
-    #[strum(props(id = "410"))]
-    ErrorSelfNotInGroup(String),
-
-    /// Messages or chats changed.  One or more messages or chats changed for various
-    /// reasons in the database:
-    /// - Messages sent, received or removed
-    /// - Chats created, deleted or archived
-    /// - A draft has been set
-    ///
-    /// @return 0
-    #[strum(props(id = "2000"))]
-    MsgsChanged { chat_id: u32, msg_id: u32 },
-
-    /// There is a fresh message. Typically, the user will show an notification
-    /// when receiving this message.
-    ///
-    /// There is no extra #DC_EVENT_MSGS_CHANGED event send together with this event.
-    ///
-    /// @return 0
-    #[strum(props(id = "2005"))]
-    IncomingMsg { chat_id: u32, msg_id: u32 },
-
-    /// A single message is sent successfully. State changed from  DC_STATE_OUT_PENDING to
-    /// DC_STATE_OUT_DELIVERED, see dc_msg_get_state().
-    ///
-    /// @return 0
-    #[strum(props(id = "2010"))]
-    MsgDelivered { chat_id: u32, msg_id: u32 },
-
-    /// A single message could not be sent. State changed from DC_STATE_OUT_PENDING or DC_STATE_OUT_DELIVERED to
-    /// DC_STATE_OUT_FAILED, see dc_msg_get_state().
-    ///
-    /// @return 0
-    #[strum(props(id = "2012"))]
-    MsgFailed { chat_id: u32, msg_id: u32 },
-
-    /// A single message is read by the receiver. State changed from DC_STATE_OUT_DELIVERED to
-    /// DC_STATE_OUT_MDN_RCVD, see dc_msg_get_state().
-    ///
-    /// @return 0
-    #[strum(props(id = "2015"))]
-    MsgRead { chat_id: u32, msg_id: u32 },
-
-    /// Chat changed.  The name or the image of a chat group was changed or members were added or removed.
-    /// Or the verify state of a chat has changed.
-    /// See dc_set_chat_name(), dc_set_chat_profile_image(), dc_add_contact_to_chat()
-    /// and dc_remove_contact_from_chat().
-    ///
-    /// @return 0
-    #[strum(props(id = "2020"))]
-    ChatModified(u32),
-
-    /// Contact(s) created, renamed, blocked or deleted.
-    ///
-    /// @param data1 (int) If set, this is the contact_id of an added contact that should be selected.
-    /// @return 0
-    #[strum(props(id = "2030"))]
-    ContactsChanged(Option<u32>),
-
-    /// Location of one or more contact has changed.
-    ///
-    /// @param data1 (u32) contact_id of the contact for which the location has changed.
-    ///     If the locations of several contacts have been changed,
-    ///     eg. after calling dc_delete_all_locations(), this parameter is set to `None`.
-    /// @return 0
-    #[strum(props(id = "2035"))]
-    LocationChanged(Option<u32>),
-
-    /// Inform about the configuration progress started by configure().
-    ///
-    /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
-    /// @return 0
-    #[strum(props(id = "2041"))]
-    ConfigureProgress(usize),
-
-    /// Inform about the import/export progress started by dc_imex().
-    ///
-    /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
-    /// @param data2 0
-    /// @return 0
-    #[strum(props(id = "2051"))]
-    ImexProgress(usize),
-
-    /// A file has been exported. A file has been written by dc_imex().
-    /// This event may be sent multiple times by a single call to dc_imex().
-    ///
-    /// A typical purpose for a handler of this event may be to make the file public to some system
-    /// services.
-    ///
-    /// @param data2 0
-    /// @return 0
-    #[strum(props(id = "2052"))]
-    ImexFileWritten(PathBuf),
-
-    /// Progress information of a secure-join handshake from the view of the inviter
-    /// (Alice, the person who shows the QR code).
-    ///
-    /// These events are typically sent after a joiner has scanned the QR code
-    /// generated by dc_get_securejoin_qr().
-    ///
-    /// @param data1 (int) ID of the contact that wants to join.
-    /// @param data2 (int) Progress as:
-    ///     300=vg-/vc-request received, typically shown as "bob@addr joins".
-    ///     600=vg-/vc-request-with-auth received, vg-member-added/vc-contact-confirm sent, typically shown as "bob@addr verified".
-    ///     800=vg-member-added-received received, shown as "bob@addr securely joined GROUP", only sent for the verified-group-protocol.
-    ///     1000=Protocol finished for this contact.
-    /// @return 0
-    #[strum(props(id = "2060"))]
-    SecurejoinInviterProgress { contact_id: u32, progress: usize },
-
-    /// Progress information of a secure-join handshake from the view of the joiner
-    /// (Bob, the person who scans the QR code).
-    /// The events are typically sent while dc_join_securejoin(), which
-    /// may take some time, is executed.
-    /// @param data1 (int) ID of the inviting contact.
-    /// @param data2 (int) Progress as:
-    ///     400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
-    ///     (Bob has verified alice and waits until Alice does the same for him)
-    /// @return 0
-    #[strum(props(id = "2061"))]
-    SecurejoinJoinerProgress { contact_id: u32, progress: usize },
-
-    // the following events are functions that should be provided by the frontends
-    /// Requeste a localized string from the frontend.
-    /// @param data1 (int) ID of the string to request, one of the DC_STR_/// constants.
-    /// @param data2 (int) The count. If the requested string contains a placeholder for a numeric value,
-    ///     the ui may use this value to return different strings on different plural forms.
-    /// @return (const char*) Null-terminated UTF-8 string.
-    ///     The string will be free()'d by the core,
-    ///     so it must be allocated using malloc() or a compatible function.
-    ///     Return 0 if the ui cannot provide the requested string
-    ///     the core will use a default string in english language then.
-    #[strum(props(id = "2091"))]
-    GetString { id: StockMessage, count: usize },
-}
--- a/src/imap.rs
+++ b/src/imap.rs
@@ -1,6 +1,5 @@
 use std::ffi::CString;
 use std::net;
-use std::ptr;
 use std::sync::{
    atomic::{AtomicBool, Ordering},
    Arc, Condvar, Mutex, RwLock,
@@ -9,15 +8,10 @@ use std::time::{Duration, SystemTime};

 use crate::constants::*;
 use crate::context::Context;
-use crate::dc_receive_imf::dc_receive_imf;
+use crate::dc_loginparam::*;
 use crate::dc_tools::CStringExt;
-use crate::dc_tools::*;
-use crate::events::Event;
-use crate::job::{job_add, Action};
-use crate::login_param::LoginParam;
-use crate::message::{dc_rfc724_mid_exists, dc_update_msg_move_state, dc_update_server_uid};
 use crate::oauth2::dc_get_oauth2_access_token;
-use crate::param::Params;
+use crate::types::*;

 const DC_IMAP_SEEN: usize = 0x0001;
 const DC_REGENERATE: usize = 0x01;
@@ -31,11 +25,15 @@ const PREFETCH_FLAGS: &str = "(UID ENVELOPE)";
 const BODY_FLAGS: &str = "(FLAGS BODY.PEEK[])";
 const FETCH_FLAGS: &str = "(FLAGS)";

-#[derive(Debug)]
 pub struct Imap {
    config: Arc<RwLock<ImapConfig>>,
    watch: Arc<(Mutex<bool>, Condvar)>,

+    get_config: dc_get_config_t,
+    set_config: dc_set_config_t,
+    precheck_imf: dc_precheck_imf_t,
+    receive_imf: dc_receive_imf_t,
+
    session: Arc<Mutex<Option<Session>>>,
    stream: Arc<RwLock<Option<net::TcpStream>>>,
    connected: Arc<Mutex<bool>>,
@@ -43,7 +41,6 @@ pub struct Imap {
    should_reconnect: AtomicBool,
 }

-#[derive(Debug)]
 struct OAuth2 {
    user: String,
    access_token: String,
@@ -68,7 +65,6 @@ enum FolderMeaning {
    Other,
 }

-#[derive(Debug)]
 enum Client {
    Secure(
        imap::Client<native_tls::TlsStream<net::TcpStream>>,
@@ -77,13 +73,11 @@ enum Client {
    Insecure(imap::Client<net::TcpStream>, net::TcpStream),
 }

-#[derive(Debug)]
 enum Session {
    Secure(imap::Session<native_tls::TlsStream<net::TcpStream>>),
    Insecure(imap::Session<net::TcpStream>),
 }

-#[derive(Debug)]
 enum IdleHandle<'a> {
    Secure(imap::extensions::idle::Handle<'a, native_tls::TlsStream<net::TcpStream>>),
    Insecure(imap::extensions::idle::Handle<'a, net::TcpStream>),
@@ -313,7 +307,6 @@ impl Session {
    }
 }

-#[derive(Debug)]
 struct ImapConfig {
    pub addr: String,
    pub imap_server: String,
@@ -353,12 +346,21 @@ impl Default for ImapConfig {
 }

 impl Imap {
-    pub fn new() -> Self {
+    pub fn new(
+        get_config: dc_get_config_t,
+        set_config: dc_set_config_t,
+        precheck_imf: dc_precheck_imf_t,
+        receive_imf: dc_receive_imf_t,
+    ) -> Self {
        Imap {
            session: Arc::new(Mutex::new(None)),
            stream: Arc::new(RwLock::new(None)),
            config: Arc::new(RwLock::new(ImapConfig::default())),
            watch: Arc::new((Mutex::new(false), Condvar::new())),
+            get_config,
+            set_config,
+            precheck_imf,
+            receive_imf,
            connected: Arc::new(Mutex::new(false)),
            should_reconnect: AtomicBool::new(false),
        }
@@ -438,12 +440,14 @@ impl Imap {
                let imap_server: &str = config.imap_server.as_ref();
                let imap_port = config.imap_port;

-                emit_event!(
+                log_event!(
                    context,
-                    Event::ErrorNetwork(format!(
-                        "Could not connect to IMAP-server {}:{}. ({})",
-                        imap_server, imap_port, err
-                    ))
+                    Event::ERROR_NETWORK,
+                    0,
+                    "Could not connect to IMAP-server {}:{}. ({})",
+                    imap_server,
+                    imap_port,
+                    err
                );

                return false;
@@ -459,10 +463,7 @@ impl Imap {
                true
            }
            Err((err, _)) => {
-                emit_event!(
-                    context,
-                    Event::ErrorNetwork(format!("Cannot login ({})", err))
-                );
+                log_event!(context, Event::ERROR_NETWORK, 0, "Cannot login ({})", err);
                self.unsetup_handle(context);

                false
@@ -471,9 +472,12 @@ impl Imap {
    }

    fn unsetup_handle(&self, context: &Context) {
-        info!(context, "IMAP unsetup_handle starts");
+        info!(context, 0, "IMAP unsetup_handle starts");

-        info!(context, "IMAP unsetup_handle step 1 (closing down stream).");
+        info!(
+            context,
+            0, "IMAP unsetup_handle step 1 (closing down stream)."
+        );
        let stream = self.stream.write().unwrap().take();
        if let Some(stream) = stream {
            if let Err(err) = stream.shutdown(net::Shutdown::Both) {
@@ -483,7 +487,7 @@ impl Imap {

        info!(
            context,
-            "IMAP unsetup_handle step 2 (acquiring session.lock)"
+            0, "IMAP unsetup_handle step 2 (acquiring session.lock)"
        );
        if let Some(mut session) = self.session.lock().unwrap().take() {
            if let Err(err) = session.close() {
@@ -491,10 +495,10 @@ impl Imap {
            }
        }

-        info!(context, "IMAP unsetup_handle step 3 (clearing config).");
+        info!(context, 0, "IMAP unsetup_handle step 3 (clearing config).");
        self.config.write().unwrap().selected_folder = None;
        self.config.write().unwrap().selected_mailbox = None;
-        info!(context, "IMAP unsetup_handle step 4 (disconnected).",);
+        info!(context, 0, "IMAP unsetup_handle step 4 (disconnected).",);
    }

    fn free_connect_params(&self) {
@@ -512,7 +516,7 @@ impl Imap {
        cfg.watch_folder = None;
    }

-    pub fn connect(&self, context: &Context, lp: &LoginParam) -> bool {
+    pub fn connect(&self, context: &Context, lp: &dc_loginparam_t) -> bool {
        if lp.mail_server.is_empty() || lp.mail_user.is_empty() || lp.mail_pw.is_empty() {
            return false;
        }
@@ -547,7 +551,7 @@ impl Imap {
            Some(ref mut session) => match session.capabilities() {
                Ok(caps) => {
                    if !context.sql.is_open() {
-                        warn!(context, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
+                        warn!(context, 0, "IMAP-LOGIN as {} ok but ABORTING", lp.mail_user,);
                        (true, false, false)
                    } else {
                        let can_idle = caps.has_str("IDLE");
@@ -555,18 +559,19 @@ impl Imap {
                        let caps_list = caps
                            .iter()
                            .fold(String::new(), |s, c| s + &format!(" {:?}", c));
-                        emit_event!(
+                        log_event!(
                            context,
-                            Event::ImapConnected(format!(
-                                "IMAP-LOGIN as {}, capabilities: {}",
-                                lp.mail_user, caps_list,
-                            ))
+                            Event::IMAP_CONNECTED,
+                            0,
+                            "IMAP-LOGIN as {}, capabilities: {}",
+                            lp.mail_user,
+                            caps_list,
                        );
                        (false, can_idle, has_xlist)
                    }
                }
                Err(err) => {
-                    info!(context, "CAPABILITY command error: {}", err);
+                    info!(context, 0, "CAPABILITY command error: {}", err);
                    (true, false, false)
                }
            },
@@ -642,7 +647,7 @@ impl Imap {
        // deselect existing folder, if needed (it's also done implicitly by SELECT, however, without EXPUNGE then)
        if self.config.read().unwrap().selected_folder_needs_expunge {
            if let Some(ref folder) = self.config.read().unwrap().selected_folder {
-                info!(context, "Expunge messages in \"{}\".", folder);
+                info!(context, 0, "Expunge messages in \"{}\".", folder);

                // A CLOSE-SELECT is considerably faster than an EXPUNGE-SELECT, see
                // https://tools.ietf.org/html/rfc3501#section-6.4.2
@@ -672,6 +677,7 @@ impl Imap {
                    Err(err) => {
                        info!(
                            context,
+                            0,
                            "Cannot select folder: {}; {:?}.",
                            folder.as_ref(),
                            err
@@ -692,7 +698,7 @@ impl Imap {

    fn get_config_last_seen_uid<S: AsRef<str>>(&self, context: &Context, folder: S) -> (u32, u32) {
        let key = format!("imap.mailbox.{}", folder.as_ref());
-        if let Some(entry) = context.sql.get_config(context, &key) {
+        if let Some(entry) = (self.get_config)(context, &key) {
            // the entry has the format `imap.mailbox.<folder>=<uidvalidity>:<lastseenuid>`
            let mut parts = entry.split(':');
            (
@@ -708,6 +714,7 @@ impl Imap {
        if !self.is_connected() {
            info!(
                context,
+                0,
                "Cannot fetch from \"{}\" - not connected.",
                folder.as_ref()
            );
@@ -718,6 +725,7 @@ impl Imap {
        if self.select_folder(context, Some(&folder)) == 0 {
            info!(
                context,
+                0,
                "Cannot select folder \"{}\" for fetching.",
                folder.as_ref()
            );
@@ -734,6 +742,7 @@ impl Imap {
        if mailbox.uid_validity.is_none() {
            error!(
                context,
+                0,
                "Cannot get UIDVALIDITY for folder \"{}\".",
                folder.as_ref(),
            );
@@ -745,7 +754,7 @@ impl Imap {
            // first time this folder is selected or UIDVALIDITY has changed, init lastseenuid and save it to config

            if mailbox.exists == 0 {
-                info!(context, "Folder \"{}\" is empty.", folder.as_ref());
+                info!(context, 0, "Folder \"{}\" is empty.", folder.as_ref());

                // set lastseenuid=0 for empty folders.
                // id we do not do this here, we'll miss the first message
@@ -764,6 +773,7 @@ impl Imap {
                        self.should_reconnect.store(true, Ordering::Relaxed);
                        info!(
                            context,
+                            0,
                            "No result returned for folder \"{}\".",
                            folder.as_ref()
                        );
@@ -786,6 +796,7 @@ impl Imap {
            self.set_config_last_seen_uid(context, &folder, uid_validity, last_seen_uid);
            info!(
                context,
+                0,
                "lastseenuid initialized to {} for {}@{}",
                last_seen_uid,
                folder.as_ref(),
@@ -804,7 +815,7 @@ impl Imap {
            match session.uid_fetch(set, PREFETCH_FLAGS) {
                Ok(list) => list,
                Err(err) => {
-                    warn!(context, "failed to fetch uids: {}", err);
+                    warn!(context, 0, "failed to fetch uids: {}", err);
                    return 0;
                }
            }
@@ -826,12 +837,13 @@ impl Imap {

                if 0 == unsafe {
                    let message_id_c = CString::yolo(message_id);
-                    precheck_imf(context, message_id_c.as_ptr(), folder.as_ref(), cur_uid)
+                    (self.precheck_imf)(context, message_id_c.as_ptr(), folder.as_ref(), cur_uid)
                } {
                    // check passed, go fetch the rest
                    if self.fetch_single_msg(context, &folder, cur_uid) == 0 {
                        info!(
                            context,
+                            0,
                            "Read error for message {} from \"{}\", trying over later.",
                            message_id,
                            folder.as_ref()
@@ -843,6 +855,7 @@ impl Imap {
                    // check failed
                    info!(
                        context,
+                        0,
                        "Skipping message {} from \"{}\" by precheck.",
                        message_id,
                        folder.as_ref(),
@@ -863,6 +876,7 @@ impl Imap {
        if read_errors > 0 {
            warn!(
                context,
+                0,
                "{} mails read from \"{}\" with {} errors.",
                read_cnt,
                folder.as_ref(),
@@ -871,6 +885,7 @@ impl Imap {
        } else {
            info!(
                context,
+                0,
                "{} mails read from \"{}\".",
                read_cnt,
                folder.as_ref()
@@ -890,7 +905,7 @@ impl Imap {
        let key = format!("imap.mailbox.{}", folder.as_ref());
        let val = format!("{}:{}", uidvalidity, lastseenuid);

-        context.sql.set_config(context, &key, Some(&val)).ok();
+        (self.set_config)(context, &key, Some(&val));
    }

    fn fetch_single_msg<S: AsRef<str>>(
@@ -915,6 +930,7 @@ impl Imap {
                    self.should_reconnect.store(true, Ordering::Relaxed);
                    warn!(
                        context,
+                        0,
                        "Error on fetching message #{} from folder \"{}\"; retry={}; error={}.",
                        server_uid,
                        folder.as_ref(),
@@ -931,6 +947,7 @@ impl Imap {
        if msgs.is_empty() {
            warn!(
                context,
+                0,
                "Message #{} does not exist in folder \"{}\".",
                server_uid,
                folder.as_ref()
@@ -960,7 +977,7 @@ impl Imap {
            if !is_deleted && msg.body().is_some() {
                let body = msg.body().unwrap();
                unsafe {
-                    dc_receive_imf(
+                    (self.receive_imf)(
                        context,
                        body.as_ptr() as *const libc::c_char,
                        body.len(),
@@ -984,7 +1001,7 @@ impl Imap {

        let watch_folder = self.config.read().unwrap().watch_folder.clone();
        if self.select_folder(context, watch_folder.as_ref()) == 0 {
-            warn!(context, "IMAP-IDLE not setup.",);
+            warn!(context, 0, "IMAP-IDLE not setup.",);

            return self.fake_idle(context);
        }
@@ -994,7 +1011,7 @@ impl Imap {
            let (sender, receiver) = std::sync::mpsc::channel();
            let v = self.watch.clone();

-            info!(context, "IMAP-IDLE SPAWNING");
+            info!(context, 0, "IMAP-IDLE SPAWNING");
            std::thread::spawn(move || {
                let &(ref lock, ref cvar) = &*v;
                if let Some(ref mut session) = &mut *session.lock().unwrap() {
@@ -1029,15 +1046,18 @@ impl Imap {

        let handle_res = |res| match res {
            Ok(()) => {
-                info!(context, "IMAP-IDLE has data.");
+                info!(context, 0, "IMAP-IDLE has data.");
            }
            Err(err) => match err {
                imap::error::Error::ConnectionLost => {
-                    info!(context, "IMAP-IDLE wait cancelled, we will reconnect soon.");
+                    info!(
+                        context,
+                        0, "IMAP-IDLE wait cancelled, we will reconnect soon."
+                    );
                    self.should_reconnect.store(true, Ordering::Relaxed);
                }
                _ => {
-                    warn!(context, "IMAP-IDLE returns unknown value: {}", err);
+                    warn!(context, 0, "IMAP-IDLE returns unknown value: {}", err);
                }
            },
        };
@@ -1053,7 +1073,7 @@ impl Imap {
                    if let Ok(res) = worker.as_ref().unwrap().try_recv() {
                        handle_res(res);
                    } else {
-                        info!(context, "IMAP-IDLE interrupted");
+                        info!(context, 0, "IMAP-IDLE interrupted");
                    }

                    drop(worker.take());
@@ -1071,7 +1091,7 @@ impl Imap {
        let fake_idle_start_time = SystemTime::now();
        let mut wait_long = false;

-        info!(context, "IMAP-fake-IDLEing...");
+        info!(context, 0, "IMAP-fake-IDLEing...");

        let mut do_fake_idle = true;
        while do_fake_idle {
@@ -1147,6 +1167,7 @@ impl Imap {
        } else if folder.as_ref() == dest_folder.as_ref() {
            info!(
                context,
+                0,
                "Skip moving message; message {}/{} is already in {}...",
                folder.as_ref(),
                uid,
@@ -1157,6 +1178,7 @@ impl Imap {
        } else {
            info!(
                context,
+                0,
                "Moving message {}/{} to {}...",
                folder.as_ref(),
                uid,
@@ -1166,6 +1188,7 @@ impl Imap {
            if self.select_folder(context, Some(folder.as_ref())) == 0 {
                warn!(
                    context,
+                    0,
                    "Cannot select folder {} for moving message.",
                    folder.as_ref()
                );
@@ -1179,6 +1202,7 @@ impl Imap {
                        Err(err) => {
                            info!(
                                context,
+                                0,
                                "Cannot move message, fallback to COPY/DELETE {}/{} to {}: {}",
                                folder.as_ref(),
                                uid,
@@ -1199,7 +1223,7 @@ impl Imap {
                            Ok(_) => true,
                            Err(err) => {
                                eprintln!("error copy: {:?}", err);
-                                info!(context, "Cannot copy message.",);
+                                info!(context, 0, "Cannot copy message.",);

                                false
                            }
@@ -1210,7 +1234,7 @@ impl Imap {

                    if copied {
                        if self.add_flag(context, uid, "\\Deleted") == 0 {
-                            warn!(context, "Cannot mark message as \"Deleted\".",);
+                            warn!(context, 0, "Cannot mark message as \"Deleted\".",);
                        }
                        self.config.write().unwrap().selected_folder_needs_expunge = true;
                        res = DC_SUCCESS;
@@ -1247,7 +1271,7 @@ impl Imap {
                Err(err) => {
                    warn!(
                        context,
-                        "IMAP failed to store: ({}, {}) {:?}", set, query, err
+                        0, "IMAP failed to store: ({}, {}) {:?}", set, query, err
                    );
                }
            }
@@ -1270,6 +1294,7 @@ impl Imap {
        } else if self.is_connected() {
            info!(
                context,
+                0,
                "Marking message {}/{} as seen...",
                folder.as_ref(),
                uid,
@@ -1278,11 +1303,12 @@ impl Imap {
            if self.select_folder(context, Some(folder.as_ref())) == 0 {
                warn!(
                    context,
+                    0,
                    "Cannot select folder {} for setting SEEN flag.",
                    folder.as_ref(),
                );
            } else if self.add_flag(context, uid, "\\Seen") == 0 {
-                warn!(context, "Cannot mark message as seen.",);
+                warn!(context, 0, "Cannot mark message as seen.",);
            } else {
                res = DC_SUCCESS
            }
@@ -1309,6 +1335,7 @@ impl Imap {
        } else if self.is_connected() {
            info!(
                context,
+                0,
                "Marking message {}/{} as $MDNSent...",
                folder.as_ref(),
                uid,
@@ -1317,6 +1344,7 @@ impl Imap {
            if self.select_folder(context, Some(folder.as_ref())) == 0 {
                warn!(
                    context,
+                    0,
                    "Cannot select folder {} for setting $MDNSent flag.",
                    folder.as_ref()
                );
@@ -1383,16 +1411,16 @@ impl Imap {
                        };

                        if res == DC_SUCCESS {
-                            info!(context, "$MDNSent just set and MDN will be sent.");
+                            info!(context, 0, "$MDNSent just set and MDN will be sent.");
                        } else {
-                            info!(context, "$MDNSent already set and MDN already sent.");
+                            info!(context, 0, "$MDNSent already set and MDN already sent.");
                        }
                    }
                } else {
                    res = DC_SUCCESS;
                    info!(
                        context,
-                        "Cannot store $MDNSent flags, risk sending duplicate MDN.",
+                        0, "Cannot store $MDNSent flags, risk sending duplicate MDN.",
                    );
                }
            }
@@ -1423,6 +1451,7 @@ impl Imap {
        } else {
            info!(
                context,
+                0,
                "Marking message \"{}\", {}/{} for deletion...",
                message_id.as_ref(),
                folder.as_ref(),
@@ -1432,6 +1461,7 @@ impl Imap {
            if self.select_folder(context, Some(&folder)) == 0 {
                warn!(
                    context,
+                    0,
                    "Cannot select folder {} for deleting message.",
                    folder.as_ref()
                );
@@ -1452,6 +1482,7 @@ impl Imap {
                            {
                                warn!(
                                    context,
+                                    0,
                                    "Cannot delete on IMAP, {}/{} does not match {}.",
                                    folder.as_ref(),
                                    server_uid,
@@ -1465,6 +1496,7 @@ impl Imap {

                            warn!(
                                context,
+                                0,
                                "Cannot delete on IMAP, {}/{} not found.",
                                folder.as_ref(),
                                server_uid,
@@ -1476,7 +1508,7 @@ impl Imap {

                // mark the message for deletion
                if self.add_flag(context, *server_uid, "\\Deleted") == 0 {
-                    warn!(context, "Cannot mark message as \"Deleted\".");
+                    warn!(context, 0, "Cannot mark message as \"Deleted\".");
                } else {
                    self.config.write().unwrap().selected_folder_needs_expunge = true;
                    success = true
@@ -1496,7 +1528,7 @@ impl Imap {
            return;
        }

-        info!(context, "Configuring IMAP-folders.");
+        info!(context, 0, "Configuring IMAP-folders.");

        let folders = self.list_folders(context).unwrap();
        let delimiter = self.config.read().unwrap().imap_delimiter;
@@ -1515,19 +1547,21 @@ impl Imap {
            });

        if mvbox_folder.is_none() && 0 != (flags as usize & DC_CREATE_MVBOX) {
-            info!(context, "Creating MVBOX-folder \"DeltaChat\"...",);
+            info!(context, 0, "Creating MVBOX-folder \"DeltaChat\"...",);

            if let Some(ref mut session) = &mut *self.session.lock().unwrap() {
                match session.create("DeltaChat") {
                    Ok(_) => {
                        mvbox_folder = Some("DeltaChat".into());

-                        info!(context, "MVBOX-folder created.",);
+                        info!(context, 0, "MVBOX-folder created.",);
                    }
                    Err(err) => {
                        warn!(
                            context,
-                            "Cannot create MVBOX-folder, using trying INBOX subfolder. ({})", err
+                            0,
+                            "Cannot create MVBOX-folder, using trying INBOX subfolder. ({})",
+                            err
                        );

                        match session.create(&fallback_folder) {
@@ -1535,11 +1569,11 @@ impl Imap {
                                mvbox_folder = Some(fallback_folder);
                                info!(
                                    context,
-                                    "MVBOX-folder created as INBOX subfolder. ({})", err
+                                    0, "MVBOX-folder created as INBOX subfolder. ({})", err
                                );
                            }
                            Err(err) => {
-                                warn!(context, "Cannot create MVBOX-folder. ({})", err);
+                                warn!(context, 0, "Cannot create MVBOX-folder. ({})", err);
                            }
                        }
                    }
@@ -1585,13 +1619,13 @@ impl Imap {
            match session.list(Some(""), Some("*")) {
                Ok(list) => {
                    if list.is_empty() {
-                        warn!(context, "Folder list is empty.",);
+                        warn!(context, 0, "Folder list is empty.",);
                    }
                    Some(list)
                }
                Err(err) => {
                    eprintln!("list error: {:?}", err);
-                    warn!(context, "Cannot get folder list.",);
+                    warn!(context, 0, "Cannot get folder list.",);

                    None
                }
@@ -1645,53 +1679,3 @@ fn get_folder_meaning(folder_name: &imap::types::Name) -> FolderMeaning {
        _ => res,
    }
 }
-
-unsafe fn precheck_imf(
-    context: &Context,
-    rfc724_mid: *const libc::c_char,
-    server_folder: &str,
-    server_uid: u32,
-) -> libc::c_int {
-    let mut rfc724_mid_exists: libc::c_int = 0i32;
-    let msg_id: u32;
-    let mut old_server_folder: *mut libc::c_char = ptr::null_mut();
-    let mut old_server_uid: u32 = 0i32 as u32;
-    let mut mark_seen: libc::c_int = 0i32;
-    msg_id = dc_rfc724_mid_exists(
-        context,
-        rfc724_mid,
-        &mut old_server_folder,
-        &mut old_server_uid,
-    );
-    if msg_id != 0i32 as libc::c_uint {
-        rfc724_mid_exists = 1i32;
-        if *old_server_folder.offset(0isize) as libc::c_int == 0i32
-            && old_server_uid == 0i32 as libc::c_uint
-        {
-            info!(context, "[move] detected bbc-self {}", as_str(rfc724_mid),);
-            mark_seen = 1i32
-        } else if as_str(old_server_folder) != server_folder {
-            info!(
-                context,
-                "[move] detected moved message {}",
-                as_str(rfc724_mid),
-            );
-            dc_update_msg_move_state(context, rfc724_mid, MoveState::Stay);
-        }
-        if as_str(old_server_folder) != server_folder || old_server_uid != server_uid {
-            dc_update_server_uid(context, rfc724_mid, server_folder, server_uid);
-        }
-        context.do_heuristics_moves(server_folder, msg_id);
-        if 0 != mark_seen {
-            job_add(
-                context,
-                Action::MarkseenMsgOnImap,
-                msg_id as libc::c_int,
-                Params::new(),
-                0,
-            );
-        }
-    }
-    libc::free(old_server_folder as *mut libc::c_void);
-    rfc724_mid_exists
-}
--- a/src/job.rs
+++ b/src/job.rs
@@ -3,7 +3,6 @@ use std::ptr;
 use std::time::Duration;

 use deltachat_derive::{FromSql, ToSql};
-use mmime::clist::*;
 use rand::{thread_rng, Rng};

 use crate::chat;
@@ -11,37 +10,28 @@ use crate::configure::*;
 use crate::constants::*;
 use crate::context::Context;
 use crate::dc_imex::*;
+use crate::dc_loginparam::*;
 use crate::dc_mimefactory::*;
 use crate::dc_tools::*;
-use crate::events::Event;
 use crate::imap::*;
 use crate::location;
-use crate::login_param::LoginParam;
 use crate::message::*;
 use crate::param::*;
 use crate::sql;
+use crate::types::*;
 use crate::x::*;

 /// Thread IDs
 #[derive(Debug, Display, Copy, Clone, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
 #[repr(i32)]
 enum Thread {
-    Unknown = 0,
    Imap = 100,
    Smtp = 5000,
 }

-impl Default for Thread {
-    fn default() -> Self {
-        Thread::Unknown
-    }
-}
-
 #[derive(Debug, Display, Copy, Clone, PartialEq, Eq, FromPrimitive, ToPrimitive, FromSql, ToSql)]
 #[repr(i32)]
 pub enum Action {
-    Unknown = 0,
-
    // Jobs in the INBOX-thread, range from DC_IMAP_THREAD..DC_IMAP_THREAD+999
    Housekeeping = 105, // low priority ...
    DeleteMsgOnImap = 110,
@@ -60,19 +50,11 @@ pub enum Action {
    SendMsgToSmtp = 5901, // ... high priority
 }

-impl Default for Action {
-    fn default() -> Self {
-        Action::Unknown
-    }
-}
-
 impl From<Action> for Thread {
    fn from(action: Action) -> Thread {
        use Action::*;

        match action {
-            Unknown => Thread::Unknown,
-
            Housekeeping => Thread::Imap,
            DeleteMsgOnImap => Thread::Imap,
            MarkseenMdnOnImap => Thread::Imap,
@@ -131,7 +113,7 @@ impl Job {
    fn do_DC_JOB_SEND(&mut self, context: &Context) {
        /* connect to SMTP server, if not yet done */
        if !context.smtp.lock().unwrap().is_connected() {
-            let loginparam = LoginParam::from_database(context, "configured_");
+            let loginparam = dc_loginparam_read(context, &context.sql, "configured_");
            let connected = context.smtp.lock().unwrap().connect(context, &loginparam);

            if !connected {
@@ -157,10 +139,12 @@ impl Job {
                    /* if there is a msg-id and it does not exist in the db, cancel sending.
                    this happends if dc_delete_msgs() was called
                    before the generated mime was sent out */
-                    if 0 != self.foreign_id && !dc_msg_exists(context, self.foreign_id) {
+                    if 0 != self.foreign_id
+                        && 0 == unsafe { dc_msg_exists(context, self.foreign_id) }
+                    {
                        warn!(
                            context,
-                            "Message {} for job {} does not exist", self.foreign_id, self.job_id,
+                            0, "Message {} for job {} does not exist", self.foreign_id, self.job_id,
                        );
                        return;
                    };
@@ -183,20 +167,22 @@ impl Job {
                            );
                            let chat_id: i32 = context
                                .sql
-                                .query_get_value(
+                                .query_row_col(
                                    context,
                                    "SELECT chat_id FROM msgs WHERE id=?",
                                    params![self.foreign_id as i32],
+                                    0,
                                )
                                .unwrap_or_default();
-                            context.call_cb(Event::MsgDelivered {
-                                chat_id: chat_id as u32,
-                                msg_id: self.foreign_id,
-                            });
+                            context.call_cb(
+                                Event::MSG_DELIVERED,
+                                chat_id as uintptr_t,
+                                self.foreign_id as uintptr_t,
+                            );
                        }
                    }
                } else {
-                    warn!(context, "Missing recipients for job {}", self.job_id,);
+                    warn!(context, 0, "Missing recipients for job {}", self.job_id,);
                }
            }
        }
@@ -276,7 +262,7 @@ impl Job {
                if dc_rfc724_mid_cnt(context, msg.rfc724_mid) != 1 {
                    info!(
                        context,
-                        "The message is deleted from the server when all parts are deleted.",
+                        0, "The message is deleted from the server when all parts are deleted.",
                    );
                    delete_from_server = 0i32
                }
@@ -439,17 +425,18 @@ pub fn perform_imap_fetch(context: &Context) {
        .unwrap_or_else(|| 1)
        == 0
    {
-        info!(context, "INBOX-watch disabled.",);
+        info!(context, 0, "INBOX-watch disabled.",);
        return;
    }
-    info!(context, "INBOX-fetch started...",);
+    info!(context, 0, "INBOX-fetch started...",);
    inbox.fetch(context);
    if inbox.should_reconnect() {
-        info!(context, "INBOX-fetch aborted, starting over...",);
+        info!(context, 0, "INBOX-fetch aborted, starting over...",);
        inbox.fetch(context);
    }
    info!(
        context,
+        0,
        "INBOX-fetch done in {:.4} ms.",
        start.elapsed().as_nanos() as f64 / 1000.0,
    );
@@ -463,13 +450,13 @@ pub fn perform_imap_idle(context: &Context) {
    if *context.perform_inbox_jobs_needed.clone().read().unwrap() {
        info!(
            context,
-            "INBOX-IDLE will not be started because of waiting jobs."
+            0, "INBOX-IDLE will not be started because of waiting jobs."
        );
        return;
    }
-    info!(context, "INBOX-IDLE started...");
+    info!(context, 0, "INBOX-IDLE started...");
    inbox.idle(context);
-    info!(context, "INBOX-IDLE ended.");
+    info!(context, 0, "INBOX-IDLE ended.");
 }

 pub fn perform_mvbox_fetch(context: &Context) {
@@ -546,16 +533,16 @@ pub fn perform_smtp_jobs(context: &Context) {
        state.perform_jobs_needed = 0;

        if state.suspended {
-            info!(context, "SMTP-jobs suspended.",);
+            info!(context, 0, "SMTP-jobs suspended.",);
            return;
        }
        state.doing_jobs = true;
        probe_smtp_network
    };

-    info!(context, "SMTP-jobs started...",);
+    info!(context, 0, "SMTP-jobs started...",);
    job_perform(context, Thread::Smtp, probe_smtp_network);
-    info!(context, "SMTP-jobs ended.");
+    info!(context, 0, "SMTP-jobs ended.");

    {
        let &(ref lock, _) = &*context.smtp_state.clone();
@@ -566,7 +553,7 @@ pub fn perform_smtp_jobs(context: &Context) {
 }

 pub fn perform_smtp_idle(context: &Context) {
-    info!(context, "SMTP-idle started...",);
+    info!(context, 0, "SMTP-idle started...",);
    {
        let &(ref lock, ref cvar) = &*context.smtp_state.clone();
        let mut state = lock.lock().unwrap();
@@ -574,7 +561,7 @@ pub fn perform_smtp_idle(context: &Context) {
        if state.perform_jobs_needed == 1 {
            info!(
                context,
-                "SMTP-idle will not be started because of waiting jobs.",
+                0, "SMTP-idle will not be started because of waiting jobs.",
            );
        } else {
            let dur = get_next_wakeup_time(context, Thread::Smtp);
@@ -592,16 +579,17 @@ pub fn perform_smtp_idle(context: &Context) {
        }
    }

-    info!(context, "SMTP-idle ended.",);
+    info!(context, 0, "SMTP-idle ended.",);
 }

 fn get_next_wakeup_time(context: &Context, thread: Thread) -> Duration {
    let t: i64 = context
        .sql
-        .query_get_value(
+        .query_row_col(
            context,
            "SELECT MIN(desired_timestamp) FROM jobs WHERE thread=?;",
            params![thread],
+            0,
        )
        .unwrap_or_default();

@@ -642,7 +630,7 @@ pub fn job_action_exists(context: &Context, action: Action) -> bool {

 /* special case for DC_JOB_SEND_MSG_TO_SMTP */
 #[allow(non_snake_case)]
-pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
+pub unsafe fn job_send_msg(context: &Context, msg_id: uint32_t) -> libc::c_int {
    let mut success = 0;

    /* load message data */
@@ -650,7 +638,7 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
    if mimefactory.is_err() || mimefactory.as_ref().unwrap().from_addr.is_null() {
        warn!(
            context,
-            "Cannot load data to send, maybe the message is deleted in between.",
+            0, "Cannot load data to send, maybe the message is deleted in between.",
        );
    } else {
        let mut mimefactory = mimefactory.unwrap();
@@ -675,12 +663,12 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
                            mimefactory.msg.param.set_int(Param::Height, height as i32);
                        }
                    }
-                    dc_msg_save_param_to_disk(context, &mut mimefactory.msg);
+                    dc_msg_save_param_to_disk(&mut mimefactory.msg);
                }
            }
        }
        /* create message */
-        if !dc_mimefactory_render(context, &mut mimefactory) {
+        if 0 == dc_mimefactory_render(&mut mimefactory) {
            dc_set_msg_failed(context, msg_id, as_opt_str(mimefactory.error));
        } else if 0
            != mimefactory
@@ -692,6 +680,7 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
        {
            warn!(
                context,
+                0,
                "e2e encryption unavailable {} - {:?}",
                msg_id,
                mimefactory.msg.param.get_int(Param::GuranteeE2ee),
@@ -703,7 +692,9 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
            );
        } else {
            /* unrecoverable */
-            if !clist_search_string_nocase(mimefactory.recipients_addr, mimefactory.from_addr) {
+            if clist_search_string_nocase(mimefactory.recipients_addr, mimefactory.from_addr)
+                == 0i32
+            {
                clist_insert_after(
                    mimefactory.recipients_names,
                    (*mimefactory.recipients_names).last,
@@ -722,7 +713,7 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
                if let Err(err) =
                    location::set_kml_sent_timestamp(context, mimefactory.msg.chat_id, time())
                {
-                    error!(context, "Failed to set kml sent_timestamp: {:?}", err);
+                    error!(context, 0, "Failed to set kml sent_timestamp: {:?}", err);
                }
                if !mimefactory.msg.hidden {
                    if let Err(err) = location::set_msg_location_id(
@@ -730,7 +721,7 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
                        mimefactory.msg.id,
                        mimefactory.out_last_added_location_id,
                    ) {
-                        error!(context, "Failed to set msg_location_id: {:?}", err);
+                        error!(context, 0, "Failed to set msg_location_id: {:?}", err);
                    }
                }
            }
@@ -743,7 +734,7 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
                    == 0
            {
                mimefactory.msg.param.set_int(Param::GuranteeE2ee, 1);
-                dc_msg_save_param_to_disk(context, &mut mimefactory.msg);
+                dc_msg_save_param_to_disk(&mut mimefactory.msg);
            }
            success = add_smtp_job(context, Action::SendMsgToSmtp, &mut mimefactory);
        }
@@ -753,14 +744,14 @@ pub unsafe fn job_send_msg(context: &Context, msg_id: u32) -> libc::c_int {
 }

 pub fn perform_imap_jobs(context: &Context) {
-    info!(context, "dc_perform_imap_jobs starting.",);
+    info!(context, 0, "dc_perform_imap_jobs starting.",);

    let probe_imap_network = *context.probe_imap_network.clone().read().unwrap();
    *context.probe_imap_network.write().unwrap() = false;
    *context.perform_inbox_jobs_needed.write().unwrap() = false;

    job_perform(context, Thread::Imap, probe_imap_network);
-    info!(context, "dc_perform_imap_jobs ended.",);
+    info!(context, 0, "dc_perform_imap_jobs ended.",);
 }

 fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
@@ -808,13 +799,14 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
    match jobs {
        Ok(ref _res) => {}
        Err(ref err) => {
-            info!(context, "query failed: {:?}", err);
+            info!(context, 0, "query failed: {:?}", err);
        }
    }

    for mut job in jobs.unwrap_or_default() {
        info!(
            context,
+            0,
            "{}-job #{}, action {} started...",
            if thread == Thread::Imap {
                "INBOX"
@@ -852,9 +844,6 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
            job.try_again = 0;

            match job.action {
-                Action::Unknown => {
-                    warn!(context, "Unknown job id found");
-                }
                Action::SendMsgToSmtp => job.do_DC_JOB_SEND(context),
                Action::DeleteMsgOnImap => job.do_DC_JOB_DELETE_MSG_ON_IMAP(context),
                Action::MarkseenMsgOnImap => job.do_DC_JOB_MARKSEEN_MSG_ON_IMAP(context),
@@ -897,6 +886,7 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
            // just try over next loop unconditionally, the ui typically interrupts idle when the file (video) is ready
            info!(
                context,
+                0,
                "{}-job #{} not yet ready and will be delayed.",
                if thread == Thread::Imap {
                    "INBOX"
@@ -914,6 +904,7 @@ fn job_perform(context: &Context, thread: Thread, probe_network: bool) {
                job.update(context);
                info!(
                    context,
+                    0,
                    "{}-job #{} not succeeded on try #{}, retry in ADD_TIME+{} (in {} seconds).",
                    if thread == Thread::Imap {
                        "INBOX"
@@ -988,9 +979,9 @@ fn connect_to_inbox(context: &Context, inbox: &Imap) -> libc::c_int {
    ret_connected
 }

-fn send_mdn(context: &Context, msg_id: u32) {
+fn send_mdn(context: &Context, msg_id: uint32_t) {
    if let Ok(mut mimefactory) = unsafe { dc_mimefactory_load_mdn(context, msg_id) } {
-        if unsafe { dc_mimefactory_render(context, &mut mimefactory) } {
+        if 0 != unsafe { dc_mimefactory_render(&mut mimefactory) } {
            add_smtp_job(context, Action::SendMdn, &mut mimefactory);
        }
    }
@@ -1012,6 +1003,7 @@ fn add_smtp_job(context: &Context, action: Action, mimefactory: &dc_mimefactory_
    if pathNfilename.is_null() {
        error!(
            context,
+            0,
            "Could not find free file name for message with ID <{}>.",
            to_string(mimefactory.rfc724_mid),
        );
@@ -1027,6 +1019,7 @@ fn add_smtp_job(context: &Context, action: Action, mimefactory: &dc_mimefactory_
    {
        error!(
            context,
+            0,
            "Could not write message <{}> to \"{}\".",
            to_string(mimefactory.rfc724_mid),
            as_str(pathNfilename),
@@ -1069,11 +1062,6 @@ pub fn job_add(
    param: Params,
    delay_seconds: i64,
 ) {
-    if action == Action::Unknown {
-        error!(context, "Invalid action passed to job_add");
-        return;
-    }
-
    let timestamp = time();
    let thread: Thread = action.into();

@@ -1094,12 +1082,11 @@ pub fn job_add(
    match thread {
        Thread::Imap => interrupt_imap_idle(context),
        Thread::Smtp => interrupt_smtp_idle(context),
-        Thread::Unknown => {}
    }
 }

 pub fn interrupt_smtp_idle(context: &Context) {
-    info!(context, "Interrupting SMTP-idle...",);
+    info!(context, 0, "Interrupting SMTP-idle...",);

    let &(ref lock, ref cvar) = &*context.smtp_state.clone();
    let mut state = lock.lock().unwrap();
@@ -1110,7 +1097,7 @@ pub fn interrupt_smtp_idle(context: &Context) {
 }

 pub fn interrupt_imap_idle(context: &Context) {
-    info!(context, "Interrupting IMAP-IDLE...",);
+    info!(context, 0, "Interrupting IMAP-IDLE...",);

    *context.perform_inbox_jobs_needed.write().unwrap() = true;
    context.inbox.read().unwrap().interrupt_idle();
--- a/src/job_thread.rs
+++ b/src/job_thread.rs
@@ -4,7 +4,6 @@ use crate::configure::*;
 use crate::context::Context;
 use crate::imap::Imap;

-#[derive(Debug)]
 pub struct JobThread {
    pub name: &'static str,
    pub folder_config_name: &'static str,
@@ -31,7 +30,7 @@ impl JobThread {
    }

    pub fn suspend(&self, context: &Context) {
-        info!(context, "Suspending {}-thread.", self.name,);
+        info!(context, 0, "Suspending {}-thread.", self.name,);
        {
            self.state.0.lock().unwrap().suspended = true;
        }
@@ -46,7 +45,7 @@ impl JobThread {
    }

    pub fn unsuspend(&self, context: &Context) {
-        info!(context, "Unsuspending {}-thread.", self.name);
+        info!(context, 0, "Unsuspending {}-thread.", self.name);

        let &(ref lock, ref cvar) = &*self.state.clone();
        let mut state = lock.lock().unwrap();
@@ -61,7 +60,7 @@ impl JobThread {
            self.state.0.lock().unwrap().jobs_needed = 1;
        }

-        info!(context, "Interrupting {}-IDLE...", self.name);
+        info!(context, 0, "Interrupting {}-IDLE...", self.name);

        self.imap.interrupt_idle();

@@ -87,15 +86,16 @@ impl JobThread {
        if use_network {
            let start = std::time::Instant::now();
            if self.connect_to_imap(context) {
-                info!(context, "{}-fetch started...", self.name);
+                info!(context, 0, "{}-fetch started...", self.name);
                self.imap.fetch(context);

                if self.imap.should_reconnect() {
-                    info!(context, "{}-fetch aborted, starting over...", self.name,);
+                    info!(context, 0, "{}-fetch aborted, starting over...", self.name,);
                    self.imap.fetch(context);
                }
                info!(
                    context,
+                    0,
                    "{}-fetch done in {:.3} ms.",
                    self.name,
                    start.elapsed().as_millis(),
@@ -142,6 +142,7 @@ impl JobThread {
            if 0 != state.jobs_needed {
                info!(
                    context,
+                    0,
                    "{}-IDLE will not be started as it was interrupted while not ideling.",
                    self.name,
                );
@@ -171,9 +172,9 @@ impl JobThread {
        }

        self.connect_to_imap(context);
-        info!(context, "{}-IDLE started...", self.name,);
+        info!(context, 0, "{}-IDLE started...", self.name,);
        self.imap.idle(context);
-        info!(context, "{}-IDLE ended.", self.name);
+        info!(context, 0, "{}-IDLE ended.", self.name);

        self.state.0.lock().unwrap().using_handle = false;
    }
--- a/src/key.rs
+++ b/src/key.rs
@@ -1,6 +1,7 @@
 use std::collections::BTreeMap;
+use std::ffi::{CStr, CString};
 use std::io::Cursor;
-use std::path::Path;
+use std::slice;

 use libc;
 use pgp::composed::{Deserializable, SignedPublicKey, SignedSecretKey};
@@ -11,6 +12,7 @@ use crate::constants::*;
 use crate::context::Context;
 use crate::dc_tools::*;
 use crate::sql::{self, Sql};
+use crate::x::*;

 #[derive(Debug, PartialEq, Eq, Clone)]
 pub enum Key {
@@ -104,6 +106,15 @@ impl Key {
        }
    }

+    pub fn from_binary(data: *const u8, len: libc::c_int, key_type: KeyType) -> Option<Self> {
+        if data.is_null() || len == 0 {
+            return None;
+        }
+
+        let bytes = unsafe { slice::from_raw_parts(data, len as usize) };
+        Self::from_slice(bytes, key_type)
+    }
+
    pub fn from_armored_string(
        data: &str,
        key_type: KeyType,
@@ -141,10 +152,11 @@ impl Key {
    ) -> Option<Self> {
        let addr = self_addr.as_ref();

-        sql.query_get_value(
+        sql.query_row_col(
            context,
            "SELECT public_key FROM keypairs WHERE addr=? AND is_default=1;",
            &[addr],
+            0,
        )
        .and_then(|blob: Vec<u8>| Self::from_slice(&blob, KeyType::Public))
    }
@@ -154,10 +166,11 @@ impl Key {
        self_addr: impl AsRef<str>,
        sql: &Sql,
    ) -> Option<Self> {
-        sql.query_get_value(
+        sql.query_row_col(
            context,
            "SELECT private_key FROM keypairs WHERE addr=? AND is_default=1;",
            &[self_addr.as_ref()],
+            0,
        )
        .and_then(|blob: Vec<u8>| Self::from_slice(&blob, KeyType::Private))
    }
@@ -215,15 +228,30 @@ impl Key {
            .expect("failed to serialize key")
    }

-    pub fn write_asc_to_file(&self, file: impl AsRef<Path>, context: &Context) -> bool {
-        let file_content = self.to_asc(None).into_bytes();
-
-        if dc_write_file_safe(context, &file, &file_content) {
-            return true;
-        } else {
-            error!(context, "Cannot write key to {}", file.as_ref().display());
+    pub fn write_asc_to_file(&self, file: *const libc::c_char, context: &Context) -> bool {
+        if file.is_null() {
            return false;
        }
+
+        let file_content = self.to_asc(None);
+        let file_content_c = CString::new(file_content).unwrap();
+
+        let success = if 0
+            == unsafe {
+                dc_write_file(
+                    context,
+                    file,
+                    file_content_c.as_ptr() as *const libc::c_void,
+                    file_content_c.as_bytes().len(),
+                )
+            } {
+            error!(context, 0, "Cannot write key to {}", to_string(file));
+            false
+        } else {
+            true
+        };
+
+        success
    }

    pub fn fingerprint(&self) -> String {
@@ -233,11 +261,23 @@ impl Key {
        }
    }

+    pub fn fingerprint_c(&self) -> *mut libc::c_char {
+        let res = CString::new(self.fingerprint()).unwrap();
+
+        unsafe { strdup(res.as_ptr()) }
+    }
+
    pub fn formatted_fingerprint(&self) -> String {
        let rawhex = self.fingerprint();
        dc_format_fingerprint(&rawhex)
    }

+    pub fn formatted_fingerprint_c(&self) -> *mut libc::c_char {
+        let res = CString::new(self.formatted_fingerprint()).unwrap();
+
+        unsafe { strdup(res.as_ptr()) }
+    }
+
    pub fn split_key(&self) -> Option<Key> {
        match self {
            Key::Public(_) => None,
@@ -283,6 +323,14 @@ pub fn dc_format_fingerprint(fingerprint: &str) -> String {
    res
 }

+pub fn dc_format_fingerprint_c(fp: *const libc::c_char) -> *mut libc::c_char {
+    let input = unsafe { CStr::from_ptr(fp).to_str().unwrap() };
+    let res = dc_format_fingerprint(input);
+    let res_c = CString::new(res).unwrap();
+
+    unsafe { strdup(res_c.as_ptr()) }
+}
+
 /// Bring a human-readable or otherwise formatted fingerprint back to the 40-characters-uppercase-hex format.
 pub fn dc_normalize_fingerprint(fp: &str) -> String {
    fp.to_uppercase()
@@ -291,6 +339,14 @@ pub fn dc_normalize_fingerprint(fp: &str) -> String {
        .collect()
 }

+pub fn dc_normalize_fingerprint_c(fp: *const libc::c_char) -> *mut libc::c_char {
+    let input = unsafe { CStr::from_ptr(fp).to_str().unwrap() };
+    let res = dc_normalize_fingerprint(input);
+    let res_c = CString::new(res).unwrap();
+
+    unsafe { strdup(res_c.as_ptr()) }
+}
+
 #[cfg(test)]
 mod tests {
    use super::*;
@@ -393,27 +449,6 @@ i8pcjGO+IZffvyZJVRWfVooBJmWWbPB1pueo3tx8w3+fcuzpxz+RLFKaPyqXO+dD
        assert_eq!(private_key, private_key2);
    }

-    #[test]
-    fn test_from_slice_bad_data() {
-        let mut bad_data: [u8; 4096] = [0; 4096];
-
-        for i in 0..4096 {
-            bad_data[i] = (i & 0xff) as u8;
-        }
-
-        for j in 0..(4096 / 40) {
-            let bad_key = Key::from_slice(
-                &bad_data[j..j + 4096 / 2 + j],
-                if 0 != j & 1 {
-                    KeyType::Public
-                } else {
-                    KeyType::Private
-                },
-            );
-            assert!(bad_key.is_none());
-        }
-    }
-
    #[test]
    #[ignore] // is too expensive
    fn test_ascii_roundtrip() {
--- a/src/keyring.rs
+++ b/src/keyring.rs
@@ -33,10 +33,11 @@ impl<'a> Keyring<'a> {
        self_addr: impl AsRef<str>,
        sql: &Sql,
    ) -> bool {
-        sql.query_get_value(
+        sql.query_row_col(
            context,
            "SELECT private_key FROM keypairs ORDER BY addr=? DESC, is_default DESC;",
            &[self_addr.as_ref()],
+            0,
        )
        .and_then(|blob: Vec<u8>| Key::from_slice(&blob, KeyType::Private))
        .map(|key| self.add_owned(key))
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,4 +1,4 @@
-#![deny(clippy::correctness, missing_debug_implementations)]
+#![deny(clippy::correctness)]
 // TODO: make all of these errors, such that clippy actually passes.
 #![warn(clippy::all, clippy::perf, clippy::not_unsafe_ptr_arg_deref)]
 // This is nice, but for now just annoying.
@@ -16,19 +16,12 @@ extern crate rusqlite;
 extern crate strum;
 #[macro_use]
 extern crate strum_macros;
-#[macro_use]
-extern crate jetscii;
-#[macro_use]
-extern crate debug_stub_derive;

 #[macro_use]
 mod log;
 #[macro_use]
 pub mod error;

-pub(crate) mod events;
-pub use events::*;
-
 mod aheader;
 pub mod chat;
 pub mod chatlist;
@@ -54,20 +47,21 @@ pub mod qr;
 mod smtp;
 pub mod sql;
 mod stock;
+pub mod types;
 pub mod x;

 pub mod dc_array;
 mod dc_dehtml;
 pub mod dc_imex;
+mod dc_loginparam;
 mod dc_mimefactory;
 pub mod dc_mimeparser;
 pub mod dc_receive_imf;
 mod dc_simplify;
 mod dc_strencode;
+mod dc_token;
 pub mod dc_tools;
-mod login_param;
 pub mod securejoin;
-mod token;

 #[cfg(test)]
 mod test_utils;
--- a/src/location.rs
+++ b/src/location.rs
@@ -3,16 +3,17 @@ use quick_xml;
 use quick_xml::events::{BytesEnd, BytesStart, BytesText};

 use crate::chat;
+use crate::constants::Event;
 use crate::constants::*;
 use crate::context::*;
 use crate::dc_tools::*;
 use crate::error::Error;
-use crate::events::Event;
 use crate::job::*;
 use crate::message::*;
 use crate::param::*;
 use crate::sql;
 use crate::stock::StockMessage;
+use crate::types::*;

 // location handling
 #[derive(Debug, Clone, Default)]
@@ -83,6 +84,7 @@ impl Kml {
                Err(e) => {
                    error!(
                        context,
+                        0,
                        "Location parsing: Error at position {}: {:?}",
                        reader.buffer_position(),
                        e
@@ -214,7 +216,7 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {
        .is_ok()
        {
            if 0 != seconds && !is_sending_locations_before {
-                msg = dc_msg_new(Viewtype::Text);
+                msg = dc_msg_new(context, Viewtype::Text);
                msg.text =
                    Some(context.stock_system_msg(StockMessage::MsgLocationEnabled, "", "", 0));
                msg.param.set_int(Param::Cmd, 8);
@@ -224,7 +226,11 @@ pub fn send_locations_to_chat(context: &Context, chat_id: u32, seconds: i64) {
                    context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
                chat::add_device_msg(context, chat_id, stock_str);
            }
-            context.call_cb(Event::ChatModified(chat_id));
+            context.call_cb(
+                Event::CHAT_MODIFIED,
+                chat_id as uintptr_t,
+                0i32 as uintptr_t,
+            );
            if 0 != seconds {
                schedule_MAYBE_SEND_LOCATIONS(context, 0i32);
                job_add(
@@ -260,16 +266,16 @@ pub fn set(context: &Context, latitude: f64, longitude: f64, accuracy: f64) -> l
    if latitude == 0.0 && longitude == 0.0 {
        return 1;
    }
-    let mut continue_streaming = false;

-    if let Ok(chats) = context.sql.query_map(
+    context.sql.query_map(
        "SELECT id FROM chats WHERE locations_send_until>?;",
-        params![time()],
-        |row| row.get::<_, i32>(0),
-        |chats| chats.collect::<Result<Vec<_>, _>>().map_err(Into::into),
-    ) {
-        for chat_id in chats {
-            if let Err(err) = context.sql.execute(
+        params![time()], |row| row.get::<_, i32>(0),
+        |chats| {
+            let mut continue_streaming = false;
+
+            for chat in chats {
+                let chat_id = chat?;
+                context.sql.execute(
                    "INSERT INTO locations  \
                     (latitude, longitude, accuracy, timestamp, chat_id, from_id) VALUES (?,?,?,?,?,?);",
                    params![
@@ -280,19 +286,16 @@ pub fn set(context: &Context, latitude: f64, longitude: f64, accuracy: f64) -> l
                        chat_id,
                        1,
                    ]
-            ) {
-                warn!(context, "failed to store location {:?}", err);
-            } else {
+                )?;
                continue_streaming = true;
            }
+            if continue_streaming {
+                context.call_cb(Event::LOCATION_CHANGED, 1, 0);
+            };
+            schedule_MAYBE_SEND_LOCATIONS(context, 0);
+            Ok(continue_streaming as libc::c_int)
        }
-        if continue_streaming {
-            context.call_cb(Event::LocationChanged(Some(1)));
-        };
-        schedule_MAYBE_SEND_LOCATIONS(context, 0);
-    }
-
-    continue_streaming as libc::c_int
+    ).unwrap_or_default()
 }

 pub fn get_range(
@@ -364,7 +367,7 @@ fn is_marker(txt: &str) -> bool {

 pub fn delete_all(context: &Context) -> Result<(), Error> {
    sql::execute(context, &context.sql, "DELETE FROM locations;", params![])?;
-    context.call_cb(Event::LocationChanged(None));
+    context.call_cb(Event::LOCATION_CHANGED, 0, 0);
    Ok(())
 }

@@ -543,81 +546,76 @@ pub fn job_do_DC_JOB_MAYBE_SEND_LOCATIONS(context: &Context, _job: &Job) {
    let mut continue_streaming: libc::c_int = 1;
    info!(
        context,
-        " ----------------- MAYBE_SEND_LOCATIONS -------------- ",
+        0, " ----------------- MAYBE_SEND_LOCATIONS -------------- ",
    );

-    if let Ok(rows) = context.sql.query_map(
-        "SELECT id, locations_send_begin, locations_last_sent \
-         FROM chats \
-         WHERE locations_send_until>?;",
-        params![now],
-        |row| {
-            let chat_id: i32 = row.get(0)?;
-            let locations_send_begin: i64 = row.get(1)?;
-            let locations_last_sent: i64 = row.get(2)?;
-            continue_streaming = 1;
+    context
+        .sql
+        .query_map(
+            "SELECT id, locations_send_begin, locations_last_sent \
+             FROM chats \
+             WHERE locations_send_until>?;",
+            params![now],
+            |row| {
+                let chat_id: i32 = row.get(0)?;
+                let locations_send_begin: i64 = row.get(1)?;
+                let locations_last_sent: i64 = row.get(2)?;
+                continue_streaming = 1;

-            // be a bit tolerant as the timer may not align exactly with time(NULL)
-            if now - locations_last_sent < (60 - 3) {
-                Ok(None)
-            } else {
-                Ok(Some((chat_id, locations_send_begin, locations_last_sent)))
-            }
-        },
-        |rows| {
-            rows.filter_map(|v| v.transpose())
-                .collect::<Result<Vec<_>, _>>()
-                .map_err(Into::into)
-        },
-    ) {
-        let msgs = context
-            .sql
-            .prepare(
-                "SELECT id \
-                 FROM locations \
-                 WHERE from_id=? \
-                 AND timestamp>=? \
-                 AND timestamp>? \
-                 AND independent=0 \
-                 ORDER BY timestamp;",
-                |mut stmt_locations, _| {
-                    let msgs = rows
-                        .into_iter()
-                        .filter_map(|(chat_id, locations_send_begin, locations_last_sent)| {
+                // be a bit tolerant as the timer may not align exactly with time(NULL)
+                if now - locations_last_sent < (60 - 3) {
+                    Ok(None)
+                } else {
+                    Ok(Some((chat_id, locations_send_begin, locations_last_sent)))
+                }
+            },
+            |rows| {
+                context.sql.prepare(
+                    "SELECT id \
+                     FROM locations \
+                     WHERE from_id=? \
+                     AND timestamp>=? \
+                     AND timestamp>? \
+                     AND independent=0 \
+                     ORDER BY timestamp;",
+                    |mut stmt_locations, _| {
+                        for (chat_id, locations_send_begin, locations_last_sent) in
+                            rows.filter_map(|r| match r {
+                                Ok(Some(v)) => Some(v),
+                                _ => None,
+                            })
+                        {
+                            // TODO: do I need to reset?
                            if !stmt_locations
                                .exists(params![1, locations_send_begin, locations_last_sent,])
                                .unwrap_or_default()
                            {
                                // if there is no new location, there's nothing to send.
                                // however, maybe we want to bypass this test eg. 15 minutes
-                                None
-                            } else {
-                                // pending locations are attached automatically to every message,
-                                // so also to this empty text message.
-                                // DC_CMD_LOCATION is only needed to create a nicer subject.
-                                //
-                                // for optimisation and to avoid flooding the sending queue,
-                                // we could sending these messages only if we're really online.
-                                // the easiest way to determine this, is to check for an empty message queue.
-                                // (might not be 100%, however, as positions are sent combined later
-                                // and dc_set_location() is typically called periodically, this is ok)
-                                let mut msg = dc_msg_new(Viewtype::Text);
-                                msg.hidden = true;
-                                msg.param.set_int(Param::Cmd, 9);
-                                Some((chat_id, msg))
+                                continue;
                            }
-                        })
-                        .collect::<Vec<_>>();
-                    Ok(msgs)
-                },
-            )
-            .unwrap_or_default(); // TODO: Better error handling
+                            // pending locations are attached automatically to every message,
+                            // so also to this empty text message.
+                            // DC_CMD_LOCATION is only needed to create a nicer subject.
+                            //
+                            // for optimisation and to avoid flooding the sending queue,
+                            // we could sending these messages only if we're really online.
+                            // the easiest way to determine this, is to check for an empty message queue.
+                            // (might not be 100%, however, as positions are sent combined later
+                            // and dc_set_location() is typically called periodically, this is ok)
+                            let mut msg = dc_msg_new(context, Viewtype::Text);
+                            msg.hidden = true;
+                            msg.param.set_int(Param::Cmd, 9);
+                            // TODO: handle cleanup on error
+                            chat::send_msg(context, chat_id as u32, &mut msg).unwrap();
+                        }
+                        Ok(())
+                    },
+                )
+            },
+        )
+        .unwrap(); // TODO: Better error handling

-        for (chat_id, mut msg) in msgs.into_iter() {
-            // TODO: better error handling
-            chat::send_msg(context, chat_id as u32, &mut msg).unwrap();
-        }
-    }
    if 0 != continue_streaming {
        schedule_MAYBE_SEND_LOCATIONS(context, 0x1);
    }
@@ -648,7 +646,11 @@ pub fn job_do_DC_JOB_MAYBE_SEND_LOC_ENDED(context: &Context, job: &mut Job) {
                ).is_ok() {
                    let stock_str = context.stock_system_msg(StockMessage::MsgLocationDisabled, "", "", 0);
                    chat::add_device_msg(context, chat_id, stock_str);
-                    context.call_cb(Event::ChatModified(chat_id));
+                    context.call_cb(
+                        Event::CHAT_MODIFIED,
+                        chat_id as usize,
+                        0,
+                    );
                }
            }
        }
--- a/src/log.rs
+++ b/src/log.rs
@@ -1,39 +1,66 @@
 #[macro_export]
 macro_rules! info {
-    ($ctx:expr,  $msg:expr) => {
-        info!($ctx, $msg,)
-    };
-    ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {
-        let formatted = format!($msg, $($args),*);
-        emit_event!($ctx, $crate::Event::Info(formatted));
+    ($ctx:expr, $data1:expr, $msg:expr) => {
+        info!($ctx, $data1, $msg,)
    };
+    ($ctx:expr, $data1:expr, $msg:expr, $($args:expr),* $(,)?) => {
+        #[allow(unused_unsafe)]
+        unsafe {
+            let formatted = format!($msg, $($args),*);
+            let formatted_c =  std::ffi::CString::new(formatted).unwrap();
+            $ctx.call_cb($crate::constants::Event::INFO, $data1 as libc::uintptr_t,
+                     formatted_c.as_ptr() as libc::uintptr_t);
+    }};
 }

 #[macro_export]
 macro_rules! warn {
-    ($ctx:expr, $msg:expr) => {
-        warn!($ctx, $msg,)
-    };
-    ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {
-        let formatted = format!($msg, $($args),*);
-        emit_event!($ctx, $crate::Event::Warning(formatted));
+    ($ctx:expr, $data1:expr, $msg:expr) => {
+        warn!($ctx, $data1, $msg,)
    };
+    ($ctx:expr, $data1:expr, $msg:expr, $($args:expr),* $(,)?) => {
+        #[allow(unused_unsafe)]
+        unsafe {
+            let formatted = format!($msg, $($args),*);
+            let formatted_c = std::ffi::CString::new(formatted).unwrap();
+            $ctx.call_cb($crate::constants::Event::WARNING, $data1 as libc::uintptr_t,
+                         formatted_c.as_ptr() as libc::uintptr_t);
+        }};
 }

 #[macro_export]
 macro_rules! error {
-    ($ctx:expr, $msg:expr) => {
-        error!($ctx, $msg,)
+    ($ctx:expr, $data1:expr, $msg:expr) => {
+        error!($ctx, $data1, $msg,)
    };
-    ($ctx:expr, $msg:expr, $($args:expr),* $(,)?) => {
+    ($ctx:expr, $data1:expr, $msg:expr, $($args:expr),* $(,)?) => {
+        #[allow(unused_unsafe)]
+        unsafe {
        let formatted = format!($msg, $($args),*);
-        emit_event!($ctx, $crate::Event::Error(formatted));
+        let formatted_c = std::ffi::CString::new(formatted).unwrap();
+        $ctx.call_cb($crate::constants::Event::ERROR, $data1 as libc::uintptr_t,
+                     formatted_c.as_ptr() as libc::uintptr_t);
+    }};
+}
+
+#[macro_export]
+macro_rules! log_event {
+    ($ctx:expr, $data1:expr, $msg:expr) => {
+        log_event!($ctx, $data1, $msg,)
    };
+    ($ctx:expr, $event:expr, $data1:expr, $msg:expr, $($args:expr),* $(,)?) => {
+        #[allow(unused_unsafe)]
+        unsafe {
+            let formatted = format!($msg, $($args),*);
+            let formatted_c = std::ffi::CString::new(formatted).unwrap();
+            $ctx.call_cb($event, $data1 as libc::uintptr_t,
+                         formatted_c.as_ptr() as libc::uintptr_t);
+    }};
 }

 #[macro_export]
 macro_rules! emit_event {
-    ($ctx:expr, $event:expr) => {
-        $ctx.call_cb($event);
+    ($ctx:expr, $event:expr, $data1:expr, $data2:expr) => {
+        $ctx.call_cb($event, $data1 as libc::uintptr_t, $data2 as libc::uintptr_t);
    };
 }
--- a/src/login_param.rs
+++ b/src/login_param.rs
@@ -1,206 +0,0 @@
-use std::borrow::Cow;
-use std::fmt;
-
-use crate::context::Context;
-use crate::error::Error;
-
-#[derive(Default, Debug)]
-pub struct LoginParam {
-    pub addr: String,
-    pub mail_server: String,
-    pub mail_user: String,
-    pub mail_pw: String,
-    pub mail_port: i32,
-    pub send_server: String,
-    pub send_user: String,
-    pub send_pw: String,
-    pub send_port: i32,
-    pub server_flags: i32,
-}
-
-impl LoginParam {
-    /// Create a new `LoginParam` with default values.
-    pub fn new() -> Self {
-        Default::default()
-    }
-
-    /// Read the login parameters from the database.
-    pub fn from_database(context: &Context, prefix: impl AsRef<str>) -> Self {
-        let prefix = prefix.as_ref();
-        let sql = &context.sql;
-
-        let key = format!("{}addr", prefix);
-        let addr = sql
-            .get_config(context, key)
-            .unwrap_or_default()
-            .trim()
-            .to_string();
-
-        let key = format!("{}mail_server", prefix);
-        let mail_server = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}mail_port", prefix);
-        let mail_port = sql.get_config_int(context, key).unwrap_or_default();
-
-        let key = format!("{}mail_user", prefix);
-        let mail_user = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}mail_pw", prefix);
-        let mail_pw = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}send_server", prefix);
-        let send_server = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}send_port", prefix);
-        let send_port = sql.get_config_int(context, key).unwrap_or_default();
-
-        let key = format!("{}send_user", prefix);
-        let send_user = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}send_pw", prefix);
-        let send_pw = sql.get_config(context, key).unwrap_or_default();
-
-        let key = format!("{}server_flags", prefix);
-        let server_flags = sql.get_config_int(context, key).unwrap_or_default();
-
-        LoginParam {
-            addr: addr.to_string(),
-            mail_server,
-            mail_user,
-            mail_pw,
-            mail_port,
-            send_server,
-            send_user,
-            send_pw,
-            send_port,
-            server_flags,
-        }
-    }
-
-    pub fn addr_str(&self) -> &str {
-        self.addr.as_str()
-    }
-
-    /// Save this loginparam to the database.
-    pub fn save_to_database(
-        &self,
-        context: &Context,
-        prefix: impl AsRef<str>,
-    ) -> Result<(), Error> {
-        let prefix = prefix.as_ref();
-        let sql = &context.sql;
-
-        let key = format!("{}addr", prefix);
-        sql.set_config(context, key, Some(&self.addr))?;
-
-        let key = format!("{}mail_server", prefix);
-        sql.set_config(context, key, Some(&self.mail_server))?;
-
-        let key = format!("{}mail_port", prefix);
-        sql.set_config_int(context, key, self.mail_port)?;
-
-        let key = format!("{}mail_user", prefix);
-        sql.set_config(context, key, Some(&self.mail_user))?;
-
-        let key = format!("{}mail_pw", prefix);
-        sql.set_config(context, key, Some(&self.mail_pw))?;
-
-        let key = format!("{}send_server", prefix);
-        sql.set_config(context, key, Some(&self.send_server))?;
-
-        let key = format!("{}send_port", prefix);
-        sql.set_config_int(context, key, self.send_port)?;
-
-        let key = format!("{}send_user", prefix);
-        sql.set_config(context, key, Some(&self.send_user))?;
-
-        let key = format!("{}send_pw", prefix);
-        sql.set_config(context, key, Some(&self.send_pw))?;
-
-        let key = format!("{}server_flags", prefix);
-        sql.set_config_int(context, key, self.server_flags)?;
-
-        Ok(())
-    }
-}
-
-impl fmt::Display for LoginParam {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        let unset = "0";
-        let pw = "***";
-
-        let flags_readable = get_readable_flags(self.server_flags);
-
-        write!(
-            f,
-            "{} {}:{}:{}:{} {}:{}:{}:{} {}",
-            unset_empty(&self.addr),
-            unset_empty(&self.mail_user),
-            if !self.mail_pw.is_empty() { pw } else { unset },
-            unset_empty(&self.mail_server),
-            self.mail_port,
-            unset_empty(&self.send_user),
-            if !self.send_pw.is_empty() { pw } else { unset },
-            unset_empty(&self.send_server),
-            self.send_port,
-            flags_readable,
-        )
-    }
-}
-
-fn unset_empty(s: &String) -> Cow<String> {
-    if s.is_empty() {
-        Cow::Owned("unset".to_string())
-    } else {
-        Cow::Borrowed(s)
-    }
-}
-
-fn get_readable_flags(flags: i32) -> String {
-    let mut res = String::new();
-    for bit in 0..31 {
-        if 0 != flags & 1 << bit {
-            let mut flag_added = 0;
-            if 1 << bit == 0x2 {
-                res += "OAUTH2 ";
-                flag_added = 1;
-            }
-            if 1 << bit == 0x4 {
-                res += "AUTH_NORMAL ";
-                flag_added = 1;
-            }
-            if 1 << bit == 0x100 {
-                res += "IMAP_STARTTLS ";
-                flag_added = 1;
-            }
-            if 1 << bit == 0x200 {
-                res += "IMAP_SSL ";
-                flag_added = 1;
-            }
-            if 1 << bit == 0x400 {
-                res += "IMAP_PLAIN ";
-                flag_added = 1;
-            }
-            if 1 << bit == 0x10000 {
-                res += "SMTP_STARTTLS ";
-                flag_added = 1
-            }
-            if 1 << bit == 0x20000 {
-                res += "SMTP_SSL ";
-                flag_added = 1
-            }
-            if 1 << bit == 0x40000 {
-                res += "SMTP_PLAIN ";
-                flag_added = 1
-            }
-            if 0 == flag_added {
-                res += &format!("{:#0x}", 1 << bit);
-            }
-        }
-    }
-    if res.is_empty() {
-        res += "0";
-    }
-
-    res
-}
--- a/src/message.rs
+++ b/src/message.rs
@@ -1,5 +1,5 @@
 use std::ffi::CString;
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::ptr;

 use deltachat_derive::{FromSql, ToSql};
@@ -9,16 +9,15 @@ use crate::chat::{self, Chat};
 use crate::constants::*;
 use crate::contact::*;
 use crate::context::*;
-use crate::dc_mimeparser::SystemMessage;
 use crate::dc_tools::*;
 use crate::error::Error;
-use crate::events::Event;
 use crate::job::*;
 use crate::lot::{Lot, LotState, Meaning};
 use crate::param::*;
 use crate::pgp::*;
 use crate::sql;
 use crate::stock::StockMessage;
+use crate::types::*;
 use crate::x::*;

 /// In practice, the user additionally cuts the string himself pixel-accurate.
@@ -39,12 +38,6 @@ pub enum MessageState {
    OutMdnRcvd = 28,
 }

-impl Default for MessageState {
-    fn default() -> Self {
-        MessageState::Undefined
-    }
-}
-
 impl From<MessageState> for LotState {
    fn from(s: MessageState) -> Self {
        use MessageState::*;
@@ -88,7 +81,7 @@ impl Lot {
            self.text1 = Some(context.stock_str(StockMessage::Draft).to_owned().into());
            self.text1_meaning = Meaning::Text1Draft;
        } else if msg.from_id == DC_CONTACT_ID_SELF {
-            if dc_msg_is_info(msg) || chat.is_self_talk() {
+            if 0 != dc_msg_is_info(msg) || chat.is_self_talk() {
                self.text1 = None;
                self.text1_meaning = Meaning::None;
            } else {
@@ -96,7 +89,7 @@ impl Lot {
                self.text1_meaning = Meaning::Text1Self;
            }
        } else if chat.typ == Chattype::Group || chat.typ == Chattype::VerifiedGroup {
-            if dc_msg_is_info(msg) || contact.is_none() {
+            if 0 != dc_msg_is_info(msg) || contact.is_none() {
                self.text1 = None;
                self.text1_meaning = Meaning::None;
            } else {
@@ -137,8 +130,8 @@ impl Lot {
 /// to check if a mail was sent, use dc_msg_is_sent()
 /// approx. max. length returned by dc_msg_get_text()
 /// approx. max. length returned by dc_get_msg_info()
-#[derive(Debug, Clone)]
-pub struct Message {
+#[derive(Clone)]
+pub struct Message<'a> {
    pub id: u32,
    pub from_id: u32,
    pub to_id: u32,
@@ -151,8 +144,9 @@ pub struct Message {
    pub timestamp_sent: i64,
    pub timestamp_rcvd: i64,
    pub text: Option<String>,
+    pub context: &'a Context,
    pub rfc724_mid: *mut libc::c_char,
-    pub in_reply_to: Option<String>,
+    pub in_reply_to: *mut libc::c_char,
    pub server_folder: Option<String>,
    pub server_uid: u32,
    // TODO: enum
@@ -165,6 +159,7 @@ pub struct Message {

 // handle messages
 pub unsafe fn dc_get_msg_info(context: &Context, msg_id: u32) -> *mut libc::c_char {
+    let mut p: *mut libc::c_char;
    let mut ret = String::new();

    let msg = dc_msg_load_from_db(context, msg_id);
@@ -174,10 +169,11 @@ pub unsafe fn dc_get_msg_info(context: &Context, msg_id: u32) -> *mut libc::c_ch

    let msg = msg.unwrap();

-    let rawtxt: Option<String> = context.sql.query_get_value(
+    let rawtxt: Option<String> = context.sql.query_row_col(
        context,
        "SELECT txt_raw FROM msgs WHERE id=?;",
        params![msg_id as i32],
+        0,
    );

    if rawtxt.is_none() {
@@ -269,16 +265,23 @@ pub unsafe fn dc_get_msg_info(context: &Context, msg_id: u32) -> *mut libc::c_ch
        _ => {}
    }

-    if let Some(path) = dc_msg_get_file(context, &msg) {
-        let bytes = dc_get_filebytes(context, &path);
-        ret += &format!("\nFile: {}, {}, bytes\n", path.display(), bytes);
+    p = dc_msg_get_file(&msg);
+    if !p.is_null() && 0 != *p.offset(0isize) as libc::c_int {
+        ret += &format!(
+            "\nFile: {}, {}, bytes\n",
+            as_str(p),
+            dc_get_filebytes(context, as_path(p)) as libc::c_int,
+        );
    }
+    free(p as *mut libc::c_void);

    if msg.type_0 != Viewtype::Text {
        ret += "Type: ";
        ret += &format!("{}", msg.type_0);
        ret += "\n";
-        ret += &format!("Mimetype: {}\n", &dc_msg_get_filemime(&msg));
+        p = dc_msg_get_filemime(&msg);
+        ret += &format!("Mimetype: {}\n", as_str(p));
+        free(p as *mut libc::c_void);
    }
    let w = msg.param.get_int(Param::Width).unwrap_or_default();
    let h = msg.param.get_int(Param::Height).unwrap_or_default();
@@ -304,11 +307,11 @@ pub unsafe fn dc_get_msg_info(context: &Context, msg_id: u32) -> *mut libc::c_ch
    ret.strdup()
 }

-pub fn dc_msg_new_untyped() -> Message {
-    dc_msg_new(Viewtype::Unknown)
+pub unsafe fn dc_msg_new_untyped<'a>(context: &'a Context) -> Message<'a> {
+    dc_msg_new(context, Viewtype::Unknown)
 }

-pub fn dc_msg_new(viewtype: Viewtype) -> Message {
+pub fn dc_msg_new<'a>(context: &'a Context, viewtype: Viewtype) -> Message<'a> {
    Message {
        id: 0,
        from_id: 0,
@@ -322,8 +325,9 @@ pub fn dc_msg_new(viewtype: Viewtype) -> Message {
        timestamp_sent: 0,
        timestamp_rcvd: 0,
        text: None,
+        context,
        rfc724_mid: std::ptr::null_mut(),
-        in_reply_to: None,
+        in_reply_to: std::ptr::null_mut(),
        server_folder: None,
        server_uid: 0,
        is_dc_message: 0,
@@ -334,24 +338,25 @@ pub fn dc_msg_new(viewtype: Viewtype) -> Message {
    }
 }

-impl Drop for Message {
+impl<'a> Drop for Message<'a> {
    fn drop(&mut self) {
        unsafe {
            free(self.rfc724_mid.cast());
+            free(self.in_reply_to.cast());
        }
    }
 }

-pub fn dc_msg_get_filemime(msg: &Message) -> String {
+pub unsafe fn dc_msg_get_filemime(msg: &Message) -> *mut libc::c_char {
    if let Some(m) = msg.param.get(Param::MimeType) {
-        return m.to_string();
+        return m.strdup();
    } else if let Some(file) = msg.param.get(Param::File) {
        if let Some((_, mime)) = dc_msg_guess_msgtype_from_suffix(Path::new(file)) {
-            return mime.to_string();
+            return mime.strdup();
        }
    }

-    "application/octet-stream".to_string()
+    "application/octet-stream".strdup()
 }

 pub fn dc_msg_guess_msgtype_from_suffix(path: &Path) -> Option<(Viewtype, &str)> {
@@ -372,10 +377,17 @@ pub fn dc_msg_guess_msgtype_from_suffix(path: &Path) -> Option<(Viewtype, &str)>
    KNOWN.get(extension).map(|x| *x)
 }

-pub unsafe fn dc_msg_get_file(context: &Context, msg: &Message) -> Option<PathBuf> {
-    msg.param
-        .get(Param::File)
-        .map(|f| dc_get_abs_path(context, f))
+pub unsafe fn dc_msg_get_file(msg: &Message) -> *mut libc::c_char {
+    let mut file_abs = ptr::null_mut();
+
+    if let Some(file_rel) = msg.param.get(Param::File) {
+        file_abs = dc_get_abs_path(msg.context, file_rel);
+    }
+    if !file_abs.is_null() {
+        file_abs
+    } else {
+        dc_strdup(0 as *const libc::c_char)
+    }
 }

 /**
@@ -425,7 +437,7 @@ pub fn dc_msg_get_timestamp(msg: &Message) -> i64 {
    }
 }

-pub fn dc_msg_load_from_db(context: &Context, id: u32) -> Result<Message, Error> {
+pub fn dc_msg_load_from_db<'a>(context: &'a Context, id: u32) -> Result<Message<'a>, Error> {
    context.sql.query_row(
        "SELECT  \
         m.id,rfc724_mid,m.mime_in_reply_to,m.server_folder,m.server_uid,m.move_state,m.chat_id,  \
@@ -436,10 +448,14 @@ pub fn dc_msg_load_from_db(context: &Context, id: u32) -> Result<Message, Error>
        params![id as i32],
        |row| {
            unsafe {
-                let mut msg = dc_msg_new_untyped();
+                let mut msg = dc_msg_new_untyped(context);
+                msg.context = context;
                msg.id = row.get::<_, i32>(0)? as u32;
                msg.rfc724_mid = row.get::<_, String>(1)?.strdup();
-                msg.in_reply_to = row.get::<_, Option<String>>(2)?;
+                msg.in_reply_to = match row.get::<_, Option<String>>(2)? {
+                    Some(s) => s.strdup(),
+                    None => std::ptr::null_mut(),
+                };
                msg.server_folder = row.get::<_, Option<String>>(3)?;
                msg.server_uid = row.get(4)?;
                msg.move_state = row.get(5)?;
@@ -458,11 +474,12 @@ pub fn dc_msg_load_from_db(context: &Context, id: u32) -> Result<Message, Error>
                    if let Ok(t) = String::from_utf8(buf.to_vec()) {
                        text = t;
                    } else {
-                        warn!(context, "dc_msg_load_from_db: could not get text column as non-lossy utf8 id {}", id);
+                        warn!(context, 0, "dc_msg_load_from_db: could not get text column as non-lossy utf8 id {}", id);
                        text = String::from_utf8_lossy(buf).into_owned();
                    }
                } else {
-                    text = "".to_string();
+                    warn!(context, 0, "dc_msg_load_from_db: could not get text column for id {}", id);
+                    text = "[ Could not read from db ]".to_string();
                }
                msg.text = Some(text);

@@ -487,10 +504,11 @@ pub fn dc_msg_load_from_db(context: &Context, id: u32) -> Result<Message, Error>
 }

 pub unsafe fn dc_get_mime_headers(context: &Context, msg_id: u32) -> *mut libc::c_char {
-    let headers: Option<String> = context.sql.query_get_value(
+    let headers: Option<String> = context.sql.query_row_col(
        context,
        "SELECT mime_headers FROM msgs WHERE id=?;",
        params![msg_id as i32],
+        0,
    );

    if let Some(headers) = headers {
@@ -519,10 +537,7 @@ pub unsafe fn dc_delete_msgs(context: &Context, msg_ids: *const u32, msg_cnt: li
    }

    if 0 != msg_cnt {
-        context.call_cb(Event::MsgsChanged {
-            chat_id: 0,
-            msg_id: 0,
-        });
+        context.call_cb(Event::MSGS_CHANGED, 0 as uintptr_t, 0 as uintptr_t);
        job_kill_action(context, Action::Housekeeping);
        job_add(context, Action::Housekeeping, 0, Params::new(), 10);
    };
@@ -562,7 +577,7 @@ pub fn dc_markseen_msgs(context: &Context, msg_ids: *const u32, msg_cnt: usize)
    );

    if msgs.is_err() {
-        warn!(context, "markseen_msgs failed: {:?}", msgs);
+        warn!(context, 0, "markseen_msgs failed: {:?}", msgs);
        return false;
    }
    let mut send_event = false;
@@ -572,7 +587,7 @@ pub fn dc_markseen_msgs(context: &Context, msg_ids: *const u32, msg_cnt: usize)
        if curr_blocked == Blocked::Not {
            if curr_state == MessageState::InFresh || curr_state == MessageState::InNoticed {
                dc_update_msg_state(context, id, MessageState::InSeen);
-                info!(context, "Seen message #{}.", id);
+                info!(context, 0, "Seen message #{}.", id);

                job_add(
                    context,
@@ -590,10 +605,7 @@ pub fn dc_markseen_msgs(context: &Context, msg_ids: *const u32, msg_cnt: usize)
    }

    if send_event {
-        context.call_cb(Event::MsgsChanged {
-            chat_id: 0,
-            msg_id: 0,
-        });
+        context.call_cb(Event::MSGS_CHANGED, 0, 0);
    }

    true
@@ -629,7 +641,7 @@ pub fn dc_star_msgs(
        .is_ok()
 }

-pub fn dc_get_msg(context: &Context, msg_id: u32) -> Result<Message, Error> {
+pub fn dc_get_msg<'a>(context: &'a Context, msg_id: u32) -> Result<Message<'a>, Error> {
    dc_msg_load_from_db(context, msg_id)
 }

@@ -687,10 +699,11 @@ pub unsafe fn dc_msg_get_filename(msg: &Message) -> *mut libc::c_char {
    }
 }

-pub fn dc_msg_get_filebytes(context: &Context, msg: &Message) -> u64 {
+pub unsafe fn dc_msg_get_filebytes(msg: &Message) -> uint64_t {
    if let Some(file) = msg.param.get(Param::File) {
-        return dc_get_filebytes(context, &file);
+        return dc_get_filebytes(msg.context, &file);
    }
+
    0
 }

@@ -706,18 +719,23 @@ pub fn dc_msg_get_duration(msg: &Message) -> libc::c_int {
    msg.param.get_int(Param::Duration).unwrap_or_default()
 }

-pub fn dc_msg_get_showpadlock(msg: &Message) -> bool {
-    msg.param.get_int(Param::GuranteeE2ee).unwrap_or_default() != 0
+// TODO should return bool /rtn
+pub fn dc_msg_get_showpadlock(msg: &Message) -> libc::c_int {
+    if msg.param.get_int(Param::GuranteeE2ee).unwrap_or_default() != 0 {
+        return 1;
+    }
+
+    0
 }

-pub fn dc_msg_get_summary(context: &Context, msg: &mut Message, chat: Option<&Chat>) -> Lot {
+pub unsafe fn dc_msg_get_summary<'a>(msg: &mut Message<'a>, chat: Option<&Chat<'a>>) -> Lot {
    let mut ret = Lot::new();

    let chat_loaded: Chat;
    let chat = if let Some(chat) = chat {
        chat
    } else {
-        if let Ok(chat) = Chat::load_from_db(context, msg.chat_id) {
+        if let Ok(chat) = Chat::load_from_db(msg.context, msg.chat_id) {
            chat_loaded = chat;
            &chat_loaded
        } else {
@@ -728,18 +746,17 @@ pub fn dc_msg_get_summary(context: &Context, msg: &mut Message, chat: Option<&Ch
    let contact = if msg.from_id != DC_CONTACT_ID_SELF as libc::c_uint
        && ((*chat).typ == Chattype::Group || (*chat).typ == Chattype::VerifiedGroup)
    {
-        Contact::get_by_id(context, msg.from_id).ok()
+        Contact::get_by_id((*chat).context, msg.from_id).ok()
    } else {
        None
    };

-    ret.fill(msg, chat, contact.as_ref(), context);
+    ret.fill(msg, chat, contact.as_ref(), msg.context);

    ret
 }

 pub unsafe fn dc_msg_get_summarytext(
-    context: &Context,
    msg: &mut Message,
    approx_characters: usize,
 ) -> *mut libc::c_char {
@@ -748,7 +765,7 @@ pub unsafe fn dc_msg_get_summarytext(
        msg.text.as_ref(),
        &mut msg.param,
        approx_characters,
-        context,
+        msg.context,
    )
    .strdup()
 }
@@ -768,7 +785,7 @@ pub fn dc_msg_get_summarytext_by_raw(
        Viewtype::Video => context.stock_str(StockMessage::Video).into_owned(),
        Viewtype::Voice => context.stock_str(StockMessage::VoiceMessage).into_owned(),
        Viewtype::Audio | Viewtype::File => {
-            if param.get_cmd() == SystemMessage::AutocryptSetupMessage {
+            if param.get_int(Param::Cmd) == Some(6) {
                append_text = false;
                context
                    .stock_str(StockMessage::AcSetupMsgSubject)
@@ -794,7 +811,7 @@ pub fn dc_msg_get_summarytext_by_raw(
            }
        }
        _ => {
-            if param.get_cmd() != SystemMessage::LocationOnly {
+            if param.get_int(Param::Cmd) != Some(9) {
                "".to_string()
            } else {
                append_text = false;
@@ -827,27 +844,48 @@ pub unsafe fn dc_msg_has_deviating_timestamp(msg: &Message) -> libc::c_int {
    (sort_timestamp / 86400 != send_timestamp / 86400) as libc::c_int
 }

-pub fn dc_msg_is_sent(msg: &Message) -> bool {
-    msg.state as i32 >= MessageState::OutDelivered as i32
+// TODO should return bool /rtn
+pub fn dc_msg_is_sent(msg: &Message) -> libc::c_int {
+    if msg.state as i32 >= MessageState::OutDelivered as i32 {
+        1
+    } else {
+        0
+    }
 }

 pub fn dc_msg_is_starred(msg: &Message) -> bool {
    msg.starred
 }

-pub fn dc_msg_is_forwarded(msg: &Message) -> bool {
-    0 != msg.param.get_int(Param::Forwarded).unwrap_or_default()
+// TODO should return bool /rtn
+pub fn dc_msg_is_forwarded(msg: &Message) -> libc::c_int {
+    if 0 != msg.param.get_int(Param::Forwarded).unwrap_or_default() {
+        1
+    } else {
+        0
+    }
 }

-pub fn dc_msg_is_info(msg: &Message) -> bool {
-    let cmd = msg.param.get_cmd();
-    msg.from_id == 2i32 as libc::c_uint
+// TODO should return bool /rtn
+pub fn dc_msg_is_info(msg: &Message) -> libc::c_int {
+    let cmd = msg.param.get_int(Param::Cmd).unwrap_or_default();
+    if msg.from_id == 2i32 as libc::c_uint
        || msg.to_id == 2i32 as libc::c_uint
-        || cmd != SystemMessage::Unknown && cmd != SystemMessage::AutocryptSetupMessage
+        || 0 != cmd && cmd != 6i32
+    {
+        return 1;
+    }
+
+    0
 }

-pub fn dc_msg_is_increation(msg: &Message) -> bool {
-    chat::msgtype_has_file(msg.type_0) && msg.state == MessageState::OutPreparing
+// TODO should return bool /rtn
+pub fn dc_msg_is_increation(msg: &Message) -> libc::c_int {
+    if chat::msgtype_has_file(msg.type_0) && msg.state == MessageState::OutPreparing {
+        1
+    } else {
+        0
+    }
 }

 pub fn dc_msg_is_setupmessage(msg: &Message) -> bool {
@@ -855,20 +893,33 @@ pub fn dc_msg_is_setupmessage(msg: &Message) -> bool {
        return false;
    }

-    msg.param.get_cmd() == SystemMessage::AutocryptSetupMessage
+    msg.param.get_int(Param::Cmd) == Some(6)
 }

-pub unsafe fn dc_msg_get_setupcodebegin(context: &Context, msg: &Message) -> *mut libc::c_char {
+pub unsafe fn dc_msg_get_setupcodebegin(msg: &Message) -> *mut libc::c_char {
+    let mut filename: *mut libc::c_char = ptr::null_mut();
+    let mut buf: *mut libc::c_char = ptr::null_mut();
+    let mut buf_bytes: size_t = 0i32 as size_t;
    // just a pointer inside buf, MUST NOT be free()'d
    let mut buf_headerline: *const libc::c_char = ptr::null();
    // just a pointer inside buf, MUST NOT be free()'d
    let mut buf_setupcodebegin: *const libc::c_char = ptr::null();
    let mut ret: *mut libc::c_char = ptr::null_mut();
    if dc_msg_is_setupmessage(msg) {
-        if let Some(filename) = dc_msg_get_file(context, msg) {
-            if let Some(mut buf) = dc_read_file_safe(context, filename) {
+        filename = dc_msg_get_file(msg);
+        if !(filename.is_null() || *filename.offset(0isize) as libc::c_int == 0i32) {
+            if !(0
+                == dc_read_file(
+                    msg.context,
+                    filename,
+                    &mut buf as *mut *mut libc::c_char as *mut *mut libc::c_void,
+                    &mut buf_bytes,
+                )
+                || buf.is_null()
+                || buf_bytes <= 0)
+            {
                if dc_split_armored_data(
-                    buf.as_mut_ptr().cast(),
+                    buf,
                    &mut buf_headerline,
                    &mut buf_setupcodebegin,
                    ptr::null_mut(),
@@ -884,6 +935,8 @@ pub unsafe fn dc_msg_get_setupcodebegin(context: &Context, msg: &Message) -> *mu
            }
        }
    }
+    free(filename as *mut libc::c_void);
+    free(buf as *mut libc::c_void);
    if !ret.is_null() {
        ret
    } else {
@@ -922,7 +975,6 @@ pub fn dc_msg_set_duration(msg: &mut Message, duration: libc::c_int) {
 }

 pub fn dc_msg_latefiling_mediasize(
-    context: &Context,
    msg: &mut Message,
    width: libc::c_int,
    height: libc::c_int,
@@ -935,20 +987,20 @@ pub fn dc_msg_latefiling_mediasize(
    if duration > 0 {
        msg.param.set_int(Param::Duration, duration);
    }
-    dc_msg_save_param_to_disk(context, msg);
+    dc_msg_save_param_to_disk(msg);
 }

-pub fn dc_msg_save_param_to_disk(context: &Context, msg: &mut Message) -> bool {
+pub fn dc_msg_save_param_to_disk(msg: &mut Message) -> bool {
    sql::execute(
-        context,
-        &context.sql,
+        msg.context,
+        &msg.context.sql,
        "UPDATE msgs SET param=? WHERE id=?;",
        params![msg.param.to_string(), msg.id as i32],
    )
    .is_ok()
 }

-pub fn dc_msg_new_load(context: &Context, msg_id: u32) -> Result<Message, Error> {
+pub fn dc_msg_new_load<'a>(context: &'a Context, msg_id: u32) -> Result<Message<'a>, Error> {
    dc_msg_load_from_db(context, msg_id)
 }

@@ -978,22 +1030,25 @@ The value is also used for CC:-summaries */

 // Context functions to work with messages

-pub fn dc_msg_exists(context: &Context, msg_id: u32) -> bool {
-    if msg_id <= DC_CHAT_ID_LAST_SPECIAL {
-        return false;
+pub unsafe fn dc_msg_exists(context: &Context, msg_id: u32) -> libc::c_int {
+    if msg_id <= 9 {
+        return 0;
    }

-    let chat_id: Option<u32> = context.sql.query_get_value(
+    let chat_id: Option<i32> = context.sql.query_row_col(
        context,
        "SELECT chat_id FROM msgs WHERE id=?;",
-        params![msg_id],
+        params![msg_id as i32],
+        0,
    );

    if let Some(chat_id) = chat_id {
-        chat_id != DC_CHAT_ID_TRASH
-    } else {
-        false
+        if chat_id != 3 {
+            return 1;
+        }
    }
+
+    0
 }

 pub fn dc_update_msg_move_state(
@@ -1019,7 +1074,7 @@ pub fn dc_set_msg_failed(context: &Context, msg_id: u32, error: Option<impl AsRe
        }
        if let Some(error) = error {
            msg.param.set(Param::Error, error.as_ref());
-            error!(context, "{}", error.as_ref());
+            error!(context, 0, "{}", error.as_ref());
        }

        if sql::execute(
@@ -1030,10 +1085,11 @@ pub fn dc_set_msg_failed(context: &Context, msg_id: u32, error: Option<impl AsRe
        )
        .is_ok()
        {
-            context.call_cb(Event::MsgFailed {
-                chat_id: msg.chat_id,
-                msg_id,
-            });
+            context.call_cb(
+                Event::MSG_FAILED,
+                msg.chat_id as uintptr_t,
+                msg_id as uintptr_t,
+            );
        }
    }
 }
@@ -1104,10 +1160,11 @@ pub unsafe fn dc_mdn_from_ext(
                /* send event about new state */
                let ist_cnt: i32 = context
                    .sql
-                    .query_get_value(
+                    .query_row_col(
                        context,
                        "SELECT COUNT(*) FROM msgs_mdns WHERE msg_id=?;",
                        params![*ret_msg_id as i32],
+                        0,
                    )
                    .unwrap_or_default();
                /*
@@ -1146,13 +1203,13 @@ pub fn dc_get_real_msg_cnt(context: &Context) -> libc::c_int {
    ) {
        Ok(res) => res,
        Err(err) => {
-            error!(context, "dc_get_real_msg_cnt() failed. {}", err);
+            error!(context, 0, "dc_get_real_msg_cnt() failed. {}", err);
            0
        }
    }
 }

-pub fn dc_get_deaddrop_msg_cnt(context: &Context) -> libc::size_t {
+pub fn dc_get_deaddrop_msg_cnt(context: &Context) -> size_t {
    match context.sql.query_row(
        "SELECT COUNT(*) \
         FROM msgs m LEFT JOIN chats c ON c.id=m.chat_id \
@@ -1160,9 +1217,9 @@ pub fn dc_get_deaddrop_msg_cnt(context: &Context) -> libc::size_t {
        rusqlite::NO_PARAMS,
        |row| row.get::<_, isize>(0),
    ) {
-        Ok(res) => res as libc::size_t,
+        Ok(res) => res as size_t,
        Err(err) => {
-            error!(context, "dc_get_deaddrop_msg_cnt() failed. {}", err);
+            error!(context, 0, "dc_get_deaddrop_msg_cnt() failed. {}", err);
            0
        }
    }
@@ -1177,7 +1234,7 @@ pub fn dc_rfc724_mid_cnt(context: &Context, rfc724_mid: *const libc::c_char) ->
    ) {
        Ok(res) => res,
        Err(err) => {
-            error!(context, "dc_get_rfc724_mid_cnt() failed. {}", err);
+            error!(context, 0, "dc_get_rfc724_mid_cnt() failed. {}", err);
            0
        }
    }
@@ -1231,7 +1288,7 @@ pub fn dc_update_server_uid(
    ) {
        Ok(_) => {}
        Err(err) => {
-            warn!(context, "msg: failed to update server_uid: {}", err);
+            warn!(context, 0, "msg: failed to update server_uid: {}", err);
        }
    }
 }
@@ -1264,7 +1321,7 @@ mod tests {

        let chat = chat::create_by_contact_id(ctx, contact).unwrap();

-        let mut msg = dc_msg_new(Viewtype::Text);
+        let mut msg = dc_msg_new(ctx, Viewtype::Text);

        let msg_id = chat::prepare_msg(ctx, chat, &mut msg).unwrap();

--- a/src/oauth2.rs
+++ b/src/oauth2.rs
@@ -97,7 +97,10 @@ pub fn dc_get_oauth2_access_token(

        let (redirect_uri, token_url, update_redirect_uri_on_success) =
            if refresh_token.is_none() || refresh_token_for != code.as_ref() {
-                info!(context, "Generate OAuth2 refresh_token and access_token...",);
+                info!(
+                    context,
+                    0, "Generate OAuth2 refresh_token and access_token...",
+                );
                (
                    context
                        .sql
@@ -109,7 +112,7 @@ pub fn dc_get_oauth2_access_token(
            } else {
                info!(
                    context,
-                    "Regenerate OAuth2 access_token by refresh_token...",
+                    0, "Regenerate OAuth2 access_token by refresh_token...",
                );
                (
                    context
@@ -131,7 +134,7 @@ pub fn dc_get_oauth2_access_token(
        if response.is_err() {
            warn!(
                context,
-                "Error calling OAuth2 at {}: {:?}", token_url, response
+                0, "Error calling OAuth2 at {}: {:?}", token_url, response
            );
            return None;
        }
@@ -139,6 +142,7 @@ pub fn dc_get_oauth2_access_token(
        if !response.status().is_success() {
            warn!(
                context,
+                0,
                "Error calling OAuth2 at {}: {:?}",
                token_url,
                response.status()
@@ -150,7 +154,7 @@ pub fn dc_get_oauth2_access_token(
        if parsed.is_err() {
            warn!(
                context,
-                "Failed to parse OAuth2 JSON response from {}: error: {:?}", token_url, parsed
+                0, "Failed to parse OAuth2 JSON response from {}: error: {:?}", token_url, parsed
            );
            return None;
        }
@@ -191,12 +195,12 @@ pub fn dc_get_oauth2_access_token(
                    .ok();
            }
        } else {
-            warn!(context, "Failed to find OAuth2 access token");
+            warn!(context, 0, "Failed to find OAuth2 access token");
        }

        response.access_token
    } else {
-        warn!(context, "Internal OAuth2 error: 2");
+        warn!(context, 0, "Internal OAuth2 error: 2");

        None
    }
@@ -264,12 +268,17 @@ impl Oauth2 {
        // }
        let response = reqwest::Client::new().get(&userinfo_url).send();
        if response.is_err() {
-            warn!(context, "Error getting userinfo: {:?}", response);
+            warn!(context, 0, "Error getting userinfo: {:?}", response);
            return None;
        }
        let mut response = response.unwrap();
        if !response.status().is_success() {
-            warn!(context, "Error getting userinfo: {:?}", response.status());
+            warn!(
+                context,
+                0,
+                "Error getting userinfo: {:?}",
+                response.status()
+            );
            return None;
        }

@@ -277,19 +286,19 @@ impl Oauth2 {
        if parsed.is_err() {
            warn!(
                context,
-                "Failed to parse userinfo JSON response: {:?}", parsed
+                0, "Failed to parse userinfo JSON response: {:?}", parsed
            );
            return None;
        }
        if let Ok(response) = parsed {
            let addr = response.get("email");
            if addr.is_none() {
-                warn!(context, "E-mail missing in userinfo.");
+                warn!(context, 0, "E-mail missing in userinfo.");
            }

            addr.map(|addr| addr.to_string())
        } else {
-            warn!(context, "Failed to parse userinfo.");
+            warn!(context, 0, "Failed to parse userinfo.");
            None
        }
    }
--- a/src/param.rs
+++ b/src/param.rs
@@ -4,7 +4,6 @@ use std::str;

 use num_traits::FromPrimitive;

-use crate::dc_mimeparser::SystemMessage;
 use crate::error;

 /// Available param keys.
@@ -95,7 +94,7 @@ impl fmt::Display for Params {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        for (i, (key, value)) in self.inner.iter().enumerate() {
            if i > 0 {
-                writeln!(f)?;
+                write!(f, "\n")?;
            }
            write!(f, "{}={}", *key as u8 as char, value)?;
        }
@@ -179,13 +178,6 @@ impl Params {
        self.get(key).and_then(|s| s.parse().ok())
    }

-    /// Get the parameter behind `Param::Cmd` interpreted as `SystemMessage`.
-    pub fn get_cmd(&self) -> SystemMessage {
-        self.get_int(Param::Cmd)
-            .and_then(SystemMessage::from_i32)
-            .unwrap_or_default()
-    }
-
    /// Get the given parameter and parse as `f64`.
    pub fn get_float(&self, key: Param) -> Option<f64> {
        self.get(key).and_then(|s| s.parse().ok())
--- a/src/pgp.rs
+++ b/src/pgp.rs
@@ -1,5 +1,6 @@
 use std::collections::HashSet;
 use std::convert::TryInto;
+use std::ffi::CStr;
 use std::io::Cursor;
 use std::ptr;

@@ -14,6 +15,7 @@ use rand::thread_rng;
 use crate::dc_tools::*;
 use crate::key::*;
 use crate::keyring::*;
+use crate::types::*;
 use crate::x::*;

 pub unsafe fn dc_split_armored_data(
@@ -24,7 +26,7 @@ pub unsafe fn dc_split_armored_data(
    ret_base64: *mut *const libc::c_char,
 ) -> bool {
    let mut success = false;
-    let mut line_chars: libc::size_t = 0;
+    let mut line_chars: size_t = 0i32 as size_t;
    let mut line: *mut libc::c_char = buf;
    let mut p1: *mut libc::c_char = buf;
    let mut p2: *mut libc::c_char;
@@ -104,7 +106,7 @@ pub unsafe fn dc_split_armored_data(
                }
                p1 = p1.offset(1isize);
                line = p1;
-                line_chars = 0;
+                line_chars = 0i32 as size_t
            } else {
                p1 = p1.offset(1isize);
                line_chars = line_chars.wrapping_add(1)
@@ -186,11 +188,15 @@ pub fn dc_pgp_create_keypair(addr: impl AsRef<str>) -> Option<(Key, Key)> {
 }

 pub fn dc_pgp_pk_encrypt(
-    plain: &[u8],
+    plain_text: *const libc::c_void,
+    plain_bytes: size_t,
    public_keys_for_encryption: &Keyring,
    private_key_for_signing: Option<&Key>,
 ) -> Option<String> {
-    let lit_msg = Message::new_literal_bytes("", plain);
+    assert!(!plain_text.is_null() && !plain_bytes > 0, "invalid input");
+
+    let bytes = unsafe { std::slice::from_raw_parts(plain_text as *const u8, plain_bytes) };
+    let lit_msg = Message::new_literal_bytes("", bytes);
    let pkeys: Vec<&SignedPublicKey> = public_keys_for_encryption
        .keys()
        .into_iter()
@@ -221,11 +227,16 @@ pub fn dc_pgp_pk_encrypt(
 }

 pub fn dc_pgp_pk_decrypt(
-    ctext: &[u8],
+    ctext: *const libc::c_void,
+    ctext_bytes: size_t,
    private_keys_for_decryption: &Keyring,
    public_keys_for_validation: &Keyring,
    ret_signature_fingerprints: Option<&mut HashSet<String>>,
 ) -> Option<Vec<u8>> {
+    assert!(!ctext.is_null() && ctext_bytes > 0, "invalid input");
+
+    let ctext = unsafe { std::slice::from_raw_parts(ctext as *const u8, ctext_bytes) };
+
    // TODO: proper error handling
    if let Ok((msg, _)) = Message::from_armor_single(Cursor::new(ctext)) {
        let skeys: Vec<&SignedSecretKey> = private_keys_for_decryption
@@ -272,25 +283,44 @@ pub fn dc_pgp_pk_decrypt(
 }

 /// Symmetric encryption.
-pub fn dc_pgp_symm_encrypt(passphrase: &str, plain: &[u8]) -> Option<String> {
+pub fn dc_pgp_symm_encrypt(
+    passphrase: *const libc::c_char,
+    plain: *const libc::c_void,
+    plain_bytes: size_t,
+) -> Option<String> {
+    assert!(!passphrase.is_null(), "invalid passphrase");
+    assert!(!plain.is_null() && !plain_bytes > 0, "invalid input");
+
+    let pw = unsafe { CStr::from_ptr(passphrase).to_str().unwrap() };
+    let bytes = unsafe { std::slice::from_raw_parts(plain as *const u8, plain_bytes) };
+
    let mut rng = thread_rng();
-    let lit_msg = Message::new_literal_bytes("", plain);
+    let lit_msg = Message::new_literal_bytes("", bytes);

    let s2k = StringToKey::new_default(&mut rng);
-    let msg =
-        lit_msg.encrypt_with_password(&mut rng, s2k, Default::default(), || passphrase.into());
+    let msg = lit_msg.encrypt_with_password(&mut rng, s2k, Default::default(), || pw.into());

    msg.and_then(|msg| msg.to_armored_string(None)).ok()
 }

 /// Symmetric decryption.
-pub fn dc_pgp_symm_decrypt(passphrase: &str, ctext: &[u8]) -> Option<Vec<u8>> {
-    let enc_msg = Message::from_bytes(Cursor::new(ctext));
+pub fn dc_pgp_symm_decrypt(
+    passphrase: *const libc::c_char,
+    ctext: *const libc::c_void,
+    ctext_bytes: size_t,
+) -> Option<Vec<u8>> {
+    assert!(!passphrase.is_null(), "invalid passphrase");
+    assert!(!ctext.is_null() && !ctext_bytes > 0, "invalid input");
+
+    let pw = unsafe { CStr::from_ptr(passphrase).to_str().unwrap() };
+    let bytes = unsafe { std::slice::from_raw_parts(ctext as *const u8, ctext_bytes) };
+
+    let enc_msg = Message::from_bytes(Cursor::new(bytes));

    enc_msg
        .and_then(|msg| {
            let mut decryptor = msg
-                .decrypt_with_password(|| passphrase.into())
+                .decrypt_with_password(|| pw.into())
                .expect("failed decryption");
            decryptor.next().expect("no message")
        })
--- a/src/qr.rs
+++ b/src/qr.rs
@@ -37,7 +37,7 @@ impl Into<Lot> for Error {
 pub fn check_qr(context: &Context, qr: impl AsRef<str>) -> Lot {
    let qr = qr.as_ref();

-    info!(context, "Scanned QR code: {}", qr);
+    info!(context, 0, "Scanned QR code: {}", qr);

    if qr.starts_with(OPENPGP4FPR_SCHEME) {
        decode_openpgp(context, qr)
--- a/src/securejoin.rs
+++ b/src/securejoin.rs
@@ -1,16 +1,18 @@
+use mmime::mailimf_types::*;
 use percent_encoding::{utf8_percent_encode, AsciiSet, NON_ALPHANUMERIC};
+use std::ptr;

 use crate::aheader::EncryptPreference;
 use crate::chat::{self, Chat};
-use crate::config::*;
 use crate::configure::*;
 use crate::constants::*;
 use crate::contact::*;
 use crate::context::Context;
 use crate::dc_mimeparser::*;
+use crate::dc_token::*;
+use crate::dc_tools::*;
 use crate::e2ee::*;
 use crate::error::Error;
-use crate::events::Event;
 use crate::key::*;
 use crate::lot::LotState;
 use crate::message::*;
@@ -18,33 +20,39 @@ use crate::param::*;
 use crate::peerstate::*;
 use crate::qr::check_qr;
 use crate::stock::StockMessage;
-use crate::token;
+use crate::types::*;

 pub const NON_ALPHANUMERIC_WITHOUT_DOT: &AsciiSet = &NON_ALPHANUMERIC.remove(b'.');

-macro_rules! joiner_progress {
-    ($context:tt, $contact_id:expr, $progress:expr) => {
+macro_rules! progress {
+    ($context:tt, $event:expr, $contact_id:expr, $progress:expr) => {
        assert!(
            $progress >= 0 && $progress <= 1000,
            "value in range 0..1000 expected with: 0=error, 1..999=progress, 1000=success"
        );
-        $context.call_cb($crate::events::Event::SecurejoinJoinerProgress {
-            contact_id: $contact_id,
-            progress: $progress,
-        });
+        $context.call_cb($event, $contact_id as uintptr_t, $progress as uintptr_t);
+    };
+}
+
+macro_rules! joiner_progress {
+    ($context:tt, $contact_id:expr, $progress:expr) => {
+        progress!(
+            $context,
+            Event::SECUREJOIN_JOINER_PROGRESS,
+            $contact_id,
+            $progress
+        );
    };
 }

 macro_rules! inviter_progress {
    ($context:tt, $contact_id:expr, $progress:expr) => {
-        assert!(
-            $progress >= 0 && $progress <= 1000,
-            "value in range 0..1000 expected with: 0=error, 1..999=progress, 1000=success"
+        progress!(
+            $context,
+            Event::SECUREJOIN_INVITER_PROGRESS,
+            $contact_id,
+            $progress
        );
-        $context.call_cb($crate::events::Event::SecurejoinInviterProgress {
-            contact_id: $contact_id,
-            progress: $progress,
-        });
    };
 }

@@ -63,7 +71,7 @@ macro_rules! get_qr_attr {
    };
 }

-pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<String> {
+pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: uint32_t) -> Option<String> {
    /* =========================================================
    ====             Alice - the inviter side            ====
    ====   Step 1 in "Setup verified contact" protocol   ====
@@ -72,12 +80,12 @@ pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<Str
    let fingerprint: String;

    ensure_secret_key_exists(context).ok();
-    let invitenumber = token::lookup_or_new(context, token::Namespace::InviteNumber, group_chat_id);
-    let auth = token::lookup_or_new(context, token::Namespace::Auth, group_chat_id);
-    let self_addr = match context.get_config(Config::ConfiguredAddr) {
+    let invitenumber = dc_token_lookup_or_new(context, DC_TOKEN_INVITENUMBER, group_chat_id);
+    let auth = dc_token_lookup_or_new(context, DC_TOKEN_AUTH, group_chat_id);
+    let self_addr = match context.sql.get_config(context, "configured_addr") {
        Some(addr) => addr,
        None => {
-            error!(context, "Not configured, cannot generate QR code.",);
+            error!(context, 0, "Not configured, cannot generate QR code.",);
            return None;
        }
    };
@@ -115,7 +123,10 @@ pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<Str
                &auth,
            ))
        } else {
-            error!(context, "Cannot get QR-code for chat-id {}", group_chat_id,);
+            error!(
+                context,
+                0, "Cannot get QR-code for chat-id {}", group_chat_id,
+            );
            return None;
        }
    } else {
@@ -125,13 +136,13 @@ pub fn dc_get_securejoin_qr(context: &Context, group_chat_id: u32) -> Option<Str
        ))
    };

-    info!(context, "Generated QR code: {}", qr.as_ref().unwrap());
+    info!(context, 0, "Generated QR code: {}", qr.as_ref().unwrap());

    qr
 }

 fn get_self_fingerprint(context: &Context) -> Option<String> {
-    if let Some(self_addr) = context.get_config(Config::ConfiguredAddr) {
+    if let Some(self_addr) = context.sql.get_config(context, "configured_addr") {
        if let Some(key) = Key::from_self_public(context, self_addr, &context.sql) {
            return Some(key.fingerprint());
        }
@@ -139,7 +150,7 @@ fn get_self_fingerprint(context: &Context) -> Option<String> {
    None
 }

-pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
+pub fn dc_join_securejoin(context: &Context, qr: &str) -> uint32_t {
    let cleanup =
        |context: &Context, contact_chat_id: u32, ongoing_allocated: bool, join_vg: bool| {
            let mut bob = context.bob.write().unwrap();
@@ -162,16 +173,16 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
            if ongoing_allocated {
                dc_free_ongoing(context);
            }
-            ret_chat_id as u32
+            ret_chat_id as uint32_t
        };
    /* ==========================================================
    ====             Bob - the joiner's side             =====
    ====   Step 2 in "Setup verified contact" protocol   =====
    ========================================================== */
-    let mut contact_chat_id: u32 = 0;
+    let mut contact_chat_id: uint32_t = 0;
    let mut join_vg: bool = false;

-    info!(context, "Requesting secure-join ...",);
+    info!(context, 0, "Requesting secure-join ...",);
    ensure_secret_key_exists(context).ok();
    if !dc_alloc_ongoing(context) {
        return cleanup(&context, contact_chat_id, false, join_vg);
@@ -179,12 +190,12 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
    let qr_scan = check_qr(context, &qr);
    if qr_scan.state != LotState::QrAskVerifyContact && qr_scan.state != LotState::QrAskVerifyGroup
    {
-        error!(context, "Unknown QR code.",);
+        error!(context, 0, "Unknown QR code.",);
        return cleanup(&context, contact_chat_id, true, join_vg);
    }
    contact_chat_id = chat::create_by_contact_id(context, qr_scan.id).unwrap_or_default();
    if contact_chat_id == 0 {
-        error!(context, "Unknown contact.",);
+        error!(context, 0, "Unknown contact.",);
        return cleanup(&context, contact_chat_id, true, join_vg);
    }
    if check_exit(context) {
@@ -210,7 +221,7 @@ pub fn dc_join_securejoin(context: &Context, qr: &str) -> u32 {
            .unwrap(),
        contact_chat_id,
    ) {
-        info!(context, "Taking protocol shortcut.");
+        info!(context, 0, "Taking protocol shortcut.");
        context.bob.write().unwrap().expects = DC_VC_CONTACT_CONFIRM;
        joiner_progress!(context, chat_id_2_contact_id(context, contact_chat_id), 400);
        let own_fingerprint = get_self_fingerprint(context).unwrap();
@@ -260,13 +271,13 @@ fn check_exit(context: &Context) -> bool {

 fn send_handshake_msg(
    context: &Context,
-    contact_chat_id: u32,
+    contact_chat_id: uint32_t,
    step: &str,
    param2: impl AsRef<str>,
    fingerprint: Option<String>,
    grpid: impl AsRef<str>,
 ) {
-    let mut msg = dc_msg_new_untyped();
+    let mut msg = unsafe { dc_msg_new_untyped(context) };
    msg.type_0 = Viewtype::Text;
    msg.text = Some(format!("Secure-Join: {}", step));
    msg.hidden = true;
@@ -297,7 +308,7 @@ fn send_handshake_msg(
    chat::send_msg(context, contact_chat_id, &mut msg).unwrap();
 }

-fn chat_id_2_contact_id(context: &Context, contact_chat_id: u32) -> u32 {
+fn chat_id_2_contact_id(context: &Context, contact_chat_id: uint32_t) -> uint32_t {
    let contacts = chat::get_chat_contacts(context, contact_chat_id);
    if contacts.len() == 1 {
        contacts[0]
@@ -332,15 +343,15 @@ fn fingerprint_equals_sender(
 /* library private: secure-join */
 pub fn handle_securejoin_handshake(
    context: &Context,
-    mimeparser: &MimeParser,
-    contact_id: u32,
+    mimeparser: &dc_mimeparser_t,
+    contact_id: uint32_t,
 ) -> libc::c_int {
    let own_fingerprint: String;

    if contact_id <= DC_CONTACT_ID_LAST_SPECIAL {
        return 0;
    }
-    let step = match mimeparser.lookup_optional_field("Secure-Join") {
+    let step = match lookup_field(mimeparser, "Secure-Join") {
        Some(s) => s,
        None => {
            return 0;
@@ -348,7 +359,7 @@ pub fn handle_securejoin_handshake(
    };
    info!(
        context,
-        ">>>>>>>>>>>>>>>>>>>>>>>>> secure-join message \'{}\' received", step,
+        0, ">>>>>>>>>>>>>>>>>>>>>>>>> secure-join message \'{}\' received", step,
    );
    let (contact_chat_id, contact_chat_id_blocked) =
        chat::create_or_lookup_by_contact_id(context, contact_id, Blocked::Not).unwrap_or_default();
@@ -369,18 +380,18 @@ pub fn handle_securejoin_handshake(
            // it just ensures, we have Bobs key now. If we do _not_ have the key because eg. MitM has removed it,
            // send_message() will fail with the error "End-to-end-encryption unavailable unexpectedly.", so, there is no additional check needed here.
            // verify that the `Secure-Join-Invitenumber:`-header matches invitenumber written to the QR code
-            let invitenumber = match mimeparser.lookup_optional_field("Secure-Join-Invitenumber") {
+            let invitenumber = match lookup_field(mimeparser, "Secure-Join-Invitenumber") {
                Some(n) => n,
                None => {
-                    warn!(context, "Secure-join denied (invitenumber missing).",);
+                    warn!(context, 0, "Secure-join denied (invitenumber missing).",);
                    return ret;
                }
            };
-            if !token::exists(context, token::Namespace::InviteNumber, &invitenumber) {
-                warn!(context, "Secure-join denied (bad invitenumber).",);
+            if !dc_token_exists(context, DC_TOKEN_INVITENUMBER, &invitenumber) {
+                warn!(context, 0, "Secure-join denied (bad invitenumber).",);
                return ret;
            }
-            info!(context, "Secure-join requested.",);
+            info!(context, 0, "Secure-join requested.",);

            inviter_progress!(context, contact_id, 300);
            send_handshake_msg(
@@ -402,7 +413,7 @@ pub fn handle_securejoin_handshake(
            };

            if cond {
-                warn!(context, "auth-required message out of sync.",);
+                warn!(context, 0, "auth-required message out of sync.",);
                // no error, just aborted somehow or a mail from another handshake
                return ret;
            }
@@ -431,7 +442,7 @@ pub fn handle_securejoin_handshake(
                end_bobs_joining(context, DC_BOB_ERROR);
                return ret;
            }
-            info!(context, "Fingerprint verified.",);
+            info!(context, 0, "Fingerprint verified.",);
            own_fingerprint = get_self_fingerprint(context).unwrap();
            joiner_progress!(context, contact_id, 400);
            context.bob.write().unwrap().expects = DC_VC_CONTACT_CONFIRM;
@@ -456,7 +467,7 @@ pub fn handle_securejoin_handshake(
            ====  Step 6 in "Out-of-band verified groups" protocol  ====
            ============================================================ */
            // verify that Secure-Join-Fingerprint:-header matches the fingerprint of Bob
-            let fingerprint = match mimeparser.lookup_optional_field("Secure-Join-Fingerprint") {
+            let fingerprint = match lookup_field(mimeparser, "Secure-Join-Fingerprint") {
                Some(fp) => fp,
                None => {
                    could_not_establish_secure_connection(
@@ -483,9 +494,9 @@ pub fn handle_securejoin_handshake(
                );
                return ret;
            }
-            info!(context, "Fingerprint verified.",);
+            info!(context, 0, "Fingerprint verified.",);
            // verify that the `Secure-Join-Auth:`-header matches the secret written to the QR code
-            let auth_0 = match mimeparser.lookup_optional_field("Secure-Join-Auth") {
+            let auth_0 = match lookup_field(mimeparser, "Secure-Join-Auth") {
                Some(auth) => auth,
                None => {
                    could_not_establish_secure_connection(
@@ -496,7 +507,7 @@ pub fn handle_securejoin_handshake(
                    return ret;
                }
            };
-            if !token::exists(context, token::Namespace::Auth, &auth_0) {
+            if !dc_token_exists(context, DC_TOKEN_AUTH, &auth_0) {
                could_not_establish_secure_connection(context, contact_chat_id, "Auth invalid.");
                return ret;
            }
@@ -509,17 +520,15 @@ pub fn handle_securejoin_handshake(
                return ret;
            }
            Contact::scaleup_origin_by_id(context, contact_id, Origin::SecurejoinInvited);
-            info!(context, "Auth verified.",);
+            info!(context, 0, "Auth verified.",);
            secure_connection_established(context, contact_chat_id);
-            emit_event!(context, Event::ContactsChanged(Some(contact_id)));
+            emit_event!(context, Event::CONTACTS_CHANGED, contact_id, 0);
            inviter_progress!(context, contact_id, 600);
            if join_vg {
-                let field_grpid = mimeparser
-                    .lookup_optional_field("Secure-Join-Group")
-                    .unwrap_or_default();
+                let field_grpid = lookup_field(mimeparser, "Secure-Join-Group").unwrap_or_default();
                let (group_chat_id, _, _) = chat::get_chat_id_by_grpid(context, &field_grpid);
                if group_chat_id == 0 {
-                    error!(context, "Chat {} not found.", &field_grpid);
+                    error!(context, 0, "Chat {} not found.", &field_grpid);
                    return ret;
                } else {
                    chat::add_contact_to_chat_ex(context, group_chat_id, contact_id, 0x1i32);
@@ -534,7 +543,7 @@ pub fn handle_securejoin_handshake(
                ret = DC_HANDSHAKE_CONTINUE_NORMAL_PROCESSING;
            }
            if context.bob.read().unwrap().expects != DC_VC_CONTACT_CONFIRM {
-                info!(context, "Message belongs to a different handshake.",);
+                info!(context, 0, "Message belongs to a different handshake.",);
                return ret;
            }
            let cond = {
@@ -545,7 +554,7 @@ pub fn handle_securejoin_handshake(
            if cond {
                warn!(
                    context,
-                    "Message out of sync or belongs to a different handshake.",
+                    0, "Message out of sync or belongs to a different handshake.",
                );
                return ret;
            }
@@ -584,12 +593,11 @@ pub fn handle_securejoin_handshake(
                return ret;
            }
            Contact::scaleup_origin_by_id(context, contact_id, Origin::SecurejoinJoined);
-            emit_event!(context, Event::ContactsChanged(None));
-            let cg_member_added = mimeparser
-                .lookup_optional_field("Chat-Group-Member-Added")
-                .unwrap_or_default();
+            emit_event!(context, Event::CONTACTS_CHANGED, 0, 0);
+            let cg_member_added =
+                lookup_field(mimeparser, "Chat-Group-Member-Added").unwrap_or_default();
            if join_vg && !addr_equals_self(context, cg_member_added) {
-                info!(context, "Message belongs to a different handshake (scaled up contact anyway to allow creation of group).");
+                info!(context, 0, "Message belongs to a different handshake (scaled up contact anyway to allow creation of group).");
                return ret;
            }
            secure_connection_established(context, contact_chat_id);
@@ -612,19 +620,19 @@ pub fn handle_securejoin_handshake(
            ====  Step 8 in "Out-of-band verified groups" protocol  ====
            ============================================================ */
            if let Ok(contact) = Contact::get_by_id(context, contact_id) {
-                if contact.is_verified(context) == VerifiedStatus::Unverified {
-                    warn!(context, "vg-member-added-received invalid.",);
+                if contact.is_verified() == VerifiedStatus::Unverified {
+                    warn!(context, 0, "vg-member-added-received invalid.",);
                    return ret;
                }
                inviter_progress!(context, contact_id, 800);
                inviter_progress!(context, contact_id, 1000);
            } else {
-                warn!(context, "vg-member-added-received invalid.",);
+                warn!(context, 0, "vg-member-added-received invalid.",);
                return ret;
            }
        }
        _ => {
-            warn!(context, "invalid step: {}", step);
+            warn!(context, 0, "invalid step: {}", step);
        }
    }
    if ret == DC_HANDSHAKE_STOP_NORMAL_PROCESSING {
@@ -638,8 +646,8 @@ fn end_bobs_joining(context: &Context, status: libc::c_int) {
    dc_stop_ongoing_process(context);
 }

-fn secure_connection_established(context: &Context, contact_chat_id: u32) {
-    let contact_id: u32 = chat_id_2_contact_id(context, contact_chat_id);
+fn secure_connection_established(context: &Context, contact_chat_id: uint32_t) {
+    let contact_id: uint32_t = chat_id_2_contact_id(context, contact_chat_id);
    let contact = Contact::get_by_id(context, contact_id);
    let addr = if let Ok(ref contact) = contact {
        contact.get_addr()
@@ -648,10 +656,32 @@ fn secure_connection_established(context: &Context, contact_chat_id: u32) {
    };
    let msg = context.stock_string_repl_str(StockMessage::ContactVerified, addr);
    chat::add_device_msg(context, contact_chat_id, msg);
-    emit_event!(context, Event::ChatModified(contact_chat_id));
+    emit_event!(context, Event::CHAT_MODIFIED, contact_chat_id, 0);
 }

-fn could_not_establish_secure_connection(context: &Context, contact_chat_id: u32, details: &str) {
+fn lookup_field(mimeparser: &dc_mimeparser_t, key: &str) -> Option<String> {
+    let field: *mut mailimf_field = dc_mimeparser_lookup_field(mimeparser, key);
+    unsafe {
+        let mut value: *const libc::c_char = ptr::null();
+        if field.is_null()
+            || (*field).fld_type != MAILIMF_FIELD_OPTIONAL_FIELD as libc::c_int
+            || (*field).fld_data.fld_optional_field.is_null()
+            || {
+                value = (*(*field).fld_data.fld_optional_field).fld_value;
+                value.is_null()
+            }
+        {
+            return None;
+        }
+        Some(as_str(value).to_string())
+    }
+}
+
+fn could_not_establish_secure_connection(
+    context: &Context,
+    contact_chat_id: uint32_t,
+    details: &str,
+) {
    let contact_id = chat_id_2_contact_id(context, contact_chat_id);
    let contact = Contact::get_by_id(context, contact_id);
    let msg = context.stock_string_repl_str(
@@ -664,7 +694,7 @@ fn could_not_establish_secure_connection(context: &Context, contact_chat_id: u32
    );

    chat::add_device_msg(context, contact_chat_id, &msg);
-    error!(context, "{} ({})", &msg, details);
+    error!(context, 0, "{} ({})", &msg, details);
 }

 fn mark_peer_as_verified(context: &Context, fingerprint: impl AsRef<str>) -> Result<(), Error> {
@@ -688,15 +718,18 @@ fn mark_peer_as_verified(context: &Context, fingerprint: impl AsRef<str>) -> Res
 * Tools: Misc.
 ******************************************************************************/

-fn encrypted_and_signed(mimeparser: &MimeParser, expected_fingerprint: impl AsRef<str>) -> bool {
+fn encrypted_and_signed(
+    mimeparser: &dc_mimeparser_t,
+    expected_fingerprint: impl AsRef<str>,
+) -> bool {
    if !mimeparser.e2ee_helper.encrypted {
-        warn!(mimeparser.context, "Message not encrypted.",);
+        warn!(mimeparser.context, 0, "Message not encrypted.",);
        false
    } else if mimeparser.e2ee_helper.signatures.len() <= 0 {
-        warn!(mimeparser.context, "Message not signed.",);
+        warn!(mimeparser.context, 0, "Message not signed.",);
        false
    } else if expected_fingerprint.as_ref().is_empty() {
-        warn!(mimeparser.context, "Fingerprint for comparison missing.",);
+        warn!(mimeparser.context, 0, "Fingerprint for comparison missing.",);
        false
    } else if !mimeparser
        .e2ee_helper
@@ -705,6 +738,7 @@ fn encrypted_and_signed(mimeparser: &MimeParser, expected_fingerprint: impl AsRe
    {
        warn!(
            mimeparser.context,
+            0,
            "Message does not match expected fingerprint {}.",
            expected_fingerprint.as_ref(),
        );
@@ -723,10 +757,11 @@ pub fn handle_degrade_event(context: &Context, peerstate: &Peerstate) {
    if Some(DegradeEvent::FingerprintChanged) == peerstate.degrade_event {
        let contact_id: i32 = context
            .sql
-            .query_get_value(
+            .query_row_col(
                context,
                "SELECT id FROM contacts WHERE addr=?;",
                params![&peerstate.addr],
+                0,
            )
            .unwrap_or_default();
        if contact_id > 0 {
@@ -741,7 +776,7 @@ pub fn handle_degrade_event(context: &Context, peerstate: &Peerstate) {
            let msg = context.stock_string_repl_str(StockMessage::ContactSetupChanged, peeraddr);

            chat::add_device_msg(context, contact_chat_id, msg);
-            emit_event!(context, Event::ChatModified(contact_chat_id));
+            emit_event!(context, Event::CHAT_MODIFIED, contact_chat_id, 0);
        }
    }
 }
--- a/src/smtp.rs
+++ b/src/smtp.rs
@@ -1,15 +1,13 @@
 use lettre::smtp::client::net::*;
 use lettre::*;

+use crate::constants::Event;
 use crate::constants::*;
 use crate::context::Context;
-use crate::events::Event;
-use crate::login_param::LoginParam;
+use crate::dc_loginparam::*;
 use crate::oauth2::*;

-#[derive(DebugStub)]
 pub struct Smtp {
-    #[debug_stub(some = "SmtpTransport")]
    transport: Option<lettre::smtp::SmtpTransport>,
    transport_connected: bool,
    /// Email address we are sending from.
@@ -45,14 +43,14 @@ impl Smtp {
    }

    /// Connect using the provided login params
-    pub fn connect(&mut self, context: &Context, lp: &LoginParam) -> bool {
+    pub fn connect(&mut self, context: &Context, lp: &dc_loginparam_t) -> bool {
        if self.is_connected() {
-            warn!(context, "SMTP already connected.");
+            warn!(context, 0, "SMTP already connected.");
            return true;
        }

        if lp.send_server.is_empty() || lp.send_port == 0 {
-            context.call_cb(Event::ErrorNetwork("SMTP bad parameters.".into()));
+            log_event!(context, Event::ERROR_NETWORK, 0, "SMTP bad parameters.",);
        }

        self.from = if let Ok(addr) = EmailAddress::new(lp.addr.clone()) {
@@ -111,14 +109,17 @@ impl Smtp {
                    .credentials(creds)
                    .connection_reuse(lettre::smtp::ConnectionReuseParameters::ReuseUnlimited);
                self.transport = Some(client.transport());
-                context.call_cb(Event::SmtpConnected(format!(
+                log_event!(
+                    context,
+                    Event::SMTP_CONNECTED,
+                    0,
                    "SMTP-LOGIN as {} ok",
                    lp.send_user,
-                )));
+                );
                true
            }
            Err(err) => {
-                warn!(context, "SMTP: failed to establish connection {:?}", err);
+                warn!(context, 0, "SMTP: failed to establish connection {:?}", err);
                false
            }
        }
@@ -140,14 +141,17 @@ impl Smtp {

            match transport.send(mail) {
                Ok(_) => {
-                    context.call_cb(Event::SmtpMessageSent(
-                        "Message was sent to SMTP server".into(),
-                    ));
+                    log_event!(
+                        context,
+                        Event::SMTP_MESSAGE_SENT,
+                        0,
+                        "Message was sent to SMTP server",
+                    );
                    self.transport_connected = true;
                    1
                }
                Err(err) => {
-                    warn!(context, "SMTP failed to send message: {}", err);
+                    warn!(context, 0, "SMTP failed to send message: {}", err);
                    self.error = Some(format!("{}", err));
                    0
                }
--- a/src/sql.rs
+++ b/src/sql.rs
@@ -13,10 +13,8 @@ use crate::peerstate::*;
 const DC_OPEN_READONLY: usize = 0x01;

 /// A wrapper around the underlying Sqlite3 object.
-#[derive(DebugStub)]
 pub struct Sql {
    pool: RwLock<Option<r2d2::Pool<r2d2_sqlite::SqliteConnectionManager>>>,
-    #[debug_stub = "ThreadLocal<String>"]
    in_use: Arc<ThreadLocal<String>>,
 }

@@ -37,7 +35,7 @@ impl Sql {
        self.in_use.remove();
        // drop closes the connection

-        info!(context, "Database closed.");
+        info!(context, 0, "Database closed.");
    }

    // return true on success, false on failure
@@ -157,13 +155,19 @@ impl Sql {
            .unwrap_or_default()
    }

-    pub fn query_get_value<P, T>(&self, context: &Context, query: &str, params: P) -> Option<T>
+    pub fn query_row_col<P, T>(
+        &self,
+        context: &Context,
+        query: &str,
+        params: P,
+        column: usize,
+    ) -> Option<T>
    where
        P: IntoIterator,
        P::Item: rusqlite::ToSql,
        T: rusqlite::types::FromSql,
    {
-        match self.query_row(query, params, |row| row.get::<_, T>(0)) {
+        match self.query_row(query, params, |row| row.get::<_, T>(column)) {
            Ok(res) => Some(res),
            Err(Error::Sql(rusqlite::Error::QueryReturnedNoRows)) => None,
            Err(Error::Sql(rusqlite::Error::InvalidColumnType(
@@ -172,7 +176,7 @@ impl Sql {
                rusqlite::types::Type::Null,
            ))) => None,
            Err(err) => {
-                error!(context, "sql: Failed query_row: {}", err);
+                error!(context, 0, "sql: Failed query_row: {}", err);
                None
            }
        }
@@ -189,7 +193,7 @@ impl Sql {
        value: Option<&str>,
    ) -> Result<()> {
        if !self.is_open() {
-            error!(context, "set_config(): Database not ready.");
+            error!(context, 0, "set_config(): Database not ready.");
            return Err(Error::SqlNoConnection);
        }

@@ -223,7 +227,7 @@ impl Sql {
        match res {
            Ok(_) => Ok(()),
            Err(err) => {
-                error!(context, "set_config(): Cannot change value. {:?}", &err);
+                error!(context, 0, "set_config(): Cannot change value. {:?}", &err);
                Err(err.into())
            }
        }
@@ -234,10 +238,11 @@ impl Sql {
        if !self.is_open() || key.as_ref().is_empty() {
            return None;
        }
-        self.query_get_value(
+        self.query_row_col(
            context,
            "SELECT value FROM config WHERE keyname=?;",
            params![key.as_ref()],
+            0,
        )
    }

@@ -254,20 +259,6 @@ impl Sql {
        self.get_config(context, key).and_then(|s| s.parse().ok())
    }

-    pub fn get_config_bool(&self, context: &Context, key: impl AsRef<str>) -> bool {
-        // Not the most obvious way to encode bool as string, but it is matter
-        // of backward compatibility.
-        self.get_config_int(context, key).unwrap_or_default() > 0
-    }
-
-    pub fn set_config_bool<T>(&self, context: &Context, key: T, value: bool) -> Result<()>
-    where
-        T: AsRef<str>,
-    {
-        let value = if value { Some("1") } else { None };
-        self.set_config(context, key, value)
-    }
-
    pub fn set_config_int64(
        &self,
        context: &Context,
@@ -312,6 +303,7 @@ fn open(
    if sql.is_open() {
        error!(
            context,
+            0,
            "Cannot open, database \"{:?}\" already opened.",
            dbfile.as_ref(),
        );
@@ -345,6 +337,7 @@ fn open(
        if !sql.table_exists("config") {
            info!(
                context,
+                0,
                "First time init: creating tables in {:?}.",
                dbfile.as_ref(),
            );
@@ -460,6 +453,7 @@ fn open(
            {
                error!(
                    context,
+                    0,
                    "Cannot create tables in new database \"{:?}\".",
                    dbfile.as_ref(),
                );
@@ -680,7 +674,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 46)?;
        }
        if dbversion < 47 {
-            info!(context, "[migration] v47");
+            info!(context, 0, "[migration] v47");
            sql.execute(
                "ALTER TABLE jobs ADD COLUMN tries INTEGER DEFAULT 0;",
                params![],
@@ -689,7 +683,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 47)?;
        }
        if dbversion < 48 {
-            info!(context, "[migration] v48");
+            info!(context, 0, "[migration] v48");
            sql.execute(
                "ALTER TABLE msgs ADD COLUMN move_state INTEGER DEFAULT 1;",
                params![],
@@ -699,7 +693,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 48)?;
        }
        if dbversion < 49 {
-            info!(context, "[migration] v49");
+            info!(context, 0, "[migration] v49");
            sql.execute(
                "ALTER TABLE chats ADD COLUMN gossiped_timestamp INTEGER DEFAULT 0;",
                params![],
@@ -708,7 +702,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 49)?;
        }
        if dbversion < 50 {
-            info!(context, "[migration] v50");
+            info!(context, 0, "[migration] v50");
            if 0 != exists_before_update {
                sql.set_config_int(context, "show_emails", 2)?;
            }
@@ -716,7 +710,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 50)?;
        }
        if dbversion < 53 {
-            info!(context, "[migration] v53");
+            info!(context, 0, "[migration] v53");
            sql.execute(
                "CREATE TABLE locations ( id INTEGER PRIMARY KEY AUTOINCREMENT, latitude REAL DEFAULT 0.0, longitude REAL DEFAULT 0.0, accuracy REAL DEFAULT 0.0, timestamp INTEGER DEFAULT 0, chat_id INTEGER DEFAULT 0, from_id INTEGER DEFAULT 0);",
                params![]
@@ -749,7 +743,7 @@ fn open(
            sql.set_config_int(context, "dbversion", 53)?;
        }
        if dbversion < 54 {
-            info!(context, "[migration] v54");
+            info!(context, 0, "[migration] v54");
            sql.execute(
                "ALTER TABLE msgs ADD COLUMN location_id INTEGER DEFAULT 0;",
                params![],
@@ -789,11 +783,11 @@ fn open(
            // for newer versions, we copy files always to the blob directory and store relative paths.
            // this snippet converts older databases and can be removed after some time.

-            info!(context, "[open] update file paths");
+            info!(context, 0, "[open] update file paths");

            let repl_from = sql
                .get_config(context, "backup_for")
-                .unwrap_or_else(|| context.get_blobdir().to_string_lossy().into());
+                .unwrap_or_else(|| to_string(context.get_blobdir()));

            let repl_from = dc_ensure_no_slash_safe(&repl_from);
            sql.execute(
@@ -816,7 +810,7 @@ fn open(
        }
    }

-    info!(context, "Opened {:?}.", dbfile.as_ref(),);
+    info!(context, 0, "Opened {:?}.", dbfile.as_ref(),);

    Ok(())
 }
@@ -831,6 +825,7 @@ where
        Err(err) => {
            error!(
                context,
+                0,
                "execute failed: {:?} for {}",
                &err,
                querystr.as_ref()
@@ -847,6 +842,7 @@ pub fn try_execute(context: &Context, sql: &Sql, querystr: impl AsRef<str>) -> R
        Err(err) => {
            warn!(
                context,
+                0,
                "Try-execute for \"{}\" failed: {}",
                querystr.as_ref(),
                &err,
@@ -890,7 +886,7 @@ pub fn get_rowid_with_conn(
        Err(err) => {
            error!(
                context,
-                "sql: Failed to retrieve rowid: {} in {}", err, query
+                0, "sql: Failed to retrieve rowid: {} in {}", err, query
            );
            0
        }
@@ -937,7 +933,7 @@ pub fn get_rowid2_with_conn(
    ) {
        Ok(id) => id,
        Err(err) => {
-            error!(context, "sql: Failed to retrieve rowid2: {}", err);
+            error!(context, 0, "sql: Failed to retrieve rowid2: {}", err);
            0
        }
    }
@@ -947,7 +943,7 @@ pub fn housekeeping(context: &Context) {
    let mut files_in_use = HashSet::new();
    let mut unreferenced_count = 0;

-    info!(context, "Start housekeeping...");
+    info!(context, 0, "Start housekeeping...");
    maybe_add_from_param(
        context,
        &mut files_in_use,
@@ -987,12 +983,12 @@ pub fn housekeeping(context: &Context) {
            },
        )
        .unwrap_or_else(|err| {
-            warn!(context, "sql: failed query: {}", err);
+            warn!(context, 0, "sql: failed query: {}", err);
        });

-    info!(context, "{} files in use.", files_in_use.len(),);
+    info!(context, 0, "{} files in use.", files_in_use.len(),);
    /* go through directory and delete unused files */
-    let p = context.get_blobdir();
+    let p = std::path::Path::new(as_str(context.get_blobdir()));
    match std::fs::read_dir(p) {
        Ok(dir_handle) => {
            /* avoid deletion of files that are just created to build a message object */
@@ -1019,16 +1015,17 @@ pub fn housekeeping(context: &Context) {

                match std::fs::metadata(entry.path()) {
                    Ok(stats) => {
-                        let recently_created = stats.created().is_ok()
+                        let created = stats.created().is_ok()
                            && stats.created().unwrap() > keep_files_newer_than;
-                        let recently_modified = stats.modified().is_ok()
+                        let modified = stats.modified().is_ok()
                            && stats.modified().unwrap() > keep_files_newer_than;
-                        let recently_accessed = stats.accessed().is_ok()
+                        let accessed = stats.accessed().is_ok()
                            && stats.accessed().unwrap() > keep_files_newer_than;

-                        if recently_created || recently_modified || recently_accessed {
+                        if created || modified || accessed {
                            info!(
                                context,
+                                0,
                                "Housekeeping: Keeping new unreferenced file #{}: {:?}",
                                unreferenced_count,
                                entry.file_name(),
@@ -1040,6 +1037,7 @@ pub fn housekeeping(context: &Context) {
                }
                info!(
                    context,
+                    0,
                    "Housekeeping: Deleting unreferenced file #{}: {:?}",
                    unreferenced_count,
                    entry.file_name()
@@ -1051,14 +1049,15 @@ pub fn housekeeping(context: &Context) {
        Err(err) => {
            warn!(
                context,
+                0,
                "Housekeeping: Cannot open {}. ({})",
-                context.get_blobdir().display(),
+                as_str(context.get_blobdir()),
                err
            );
        }
    }

-    info!(context, "Housekeeping done.",);
+    info!(context, 0, "Housekeeping done.",);
 }

 fn is_file_in_use(files_in_use: &HashSet<String>, namespc_opt: Option<&str>, name: &str) -> bool {
@@ -1091,22 +1090,15 @@ fn maybe_add_from_param(
 ) {
    context
        .sql
-        .query_map(
-            query,
-            NO_PARAMS,
-            |row| row.get::<_, String>(0),
-            |rows| {
-                for row in rows {
-                    let param: Params = row?.parse().unwrap_or_default();
-                    if let Some(file) = param.get(param_id) {
-                        maybe_add_file(files_in_use, file);
-                    }
-                }
-                Ok(())
-            },
-        )
+        .query_row(query, NO_PARAMS, |row| {
+            let param: Params = row.get::<_, String>(0)?.parse().unwrap_or_default();
+            if let Some(file) = param.get(param_id) {
+                maybe_add_file(files_in_use, file);
+            }
+            Ok(())
+        })
        .unwrap_or_else(|err| {
-            warn!(context, "sql: failed to add_from_param: {}", err);
+            warn!(context, 0, "sql: failed to add_from_param: {}", err);
        });
 }

--- a/src/stock.rs
+++ b/src/stock.rs
@@ -3,10 +3,10 @@ use std::borrow::Cow;
 use strum::EnumProperty;
 use strum_macros::EnumProperty;

+use crate::constants::Event;
 use crate::contact::*;
 use crate::context::Context;
 use crate::dc_tools::*;
-use crate::events::Event;
 use libc::free;

 /// Stock strings
@@ -128,7 +128,7 @@ impl Context {
    /// translation, then this string will be returned.  Otherwise a
    /// default (English) string is returned.
    pub fn stock_str(&self, id: StockMessage) -> Cow<str> {
-        let ptr = self.call_cb(Event::GetString { id, count: 0 }) as *mut libc::c_char;
+        let ptr = self.call_cb(Event::GET_STRING, id as usize, 0) as *mut libc::c_char;
        if ptr.is_null() {
            Cow::Borrowed(id.fallback())
        } else {
@@ -140,14 +140,12 @@ impl Context {

    /// Return stock string, replacing placeholders with provided string.
    ///
-    /// This replaces both the *first* `%1$s`, `%1$d` and `%1$@`
+    /// This replaces both the *first* `%1$s` **and** `%1$d`
    /// placeholders with the provided string.
-    /// (the `%1$@` variant is used on iOS, the other are used on Android and Desktop)
    pub fn stock_string_repl_str(&self, id: StockMessage, insert: impl AsRef<str>) -> String {
        self.stock_str(id)
            .replacen("%1$s", insert.as_ref(), 1)
            .replacen("%1$d", insert.as_ref(), 1)
-            .replacen("%1$@", insert.as_ref(), 1)
    }

    /// Return stock string, replacing placeholders with provided int.
@@ -160,10 +158,9 @@ impl Context {

    /// Return stock string, replacing 2 placeholders with provided string.
    ///
-    /// This replaces both the *first* `%1$s`, `%1$d` and `%1$@`
+    /// This replaces both the *first* `%1$s` **and** `%1$d`
    /// placeholders with the string in `insert` and does the same for
-    /// `%2$s`, `%2$d` and `%2$@` for `insert2`.
-    /// (the `%1$@` variant is used on iOS, the other are used on Android and Desktop)
+    /// `%2$s` and `%2$d` for `insert2`.
    fn stock_string_repl_str2(
        &self,
        id: StockMessage,
@@ -173,10 +170,8 @@ impl Context {
        self.stock_str(id)
            .replacen("%1$s", insert.as_ref(), 1)
            .replacen("%1$d", insert.as_ref(), 1)
-            .replacen("%1$@", insert.as_ref(), 1)
            .replacen("%2$s", insert2.as_ref(), 1)
            .replacen("%2$d", insert2.as_ref(), 1)
-            .replacen("%2$@", insert2.as_ref(), 1)
    }

    /// Return some kind of stock message
@@ -237,8 +232,11 @@ mod tests {
    use super::*;
    use crate::test_utils::*;

+    use std::ffi::CString;
+
    use crate::constants::DC_CONTACT_ID_SELF;
-    use libc::uintptr_t;
+    use crate::context::dc_context_new;
+    use crate::types::uintptr_t;

    use num_traits::ToPrimitive;

@@ -255,32 +253,36 @@ mod tests {

    #[test]
    fn test_stock_str() {
-        let t = dummy_context();
-        assert_eq!(t.ctx.stock_str(StockMessage::NoMessages), "No messages.");
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
+        assert_eq!(ctx.stock_str(StockMessage::NoMessages), "No messages.");
    }

-    fn test_stock_str_no_fallback_cb(_ctx: &Context, evt: Event) -> uintptr_t {
-        match evt {
-            Event::GetString {
-                id: StockMessage::NoMessages,
-                ..
-            } => unsafe { "Hello there".strdup() as usize },
-            _ => 0,
+    unsafe extern "C" fn test_stock_str_no_fallback_cb(
+        _ctx: &Context,
+        evt: Event,
+        d1: uintptr_t,
+        _d2: uintptr_t,
+    ) -> uintptr_t {
+        if evt == Event::GET_STRING && d1 == StockMessage::NoMessages.to_usize().unwrap() {
+            let tmp = CString::new("Hello there").unwrap();
+            dc_strdup(tmp.as_ptr()) as usize
+        } else {
+            0
        }
    }

    #[test]
    fn test_stock_str_no_fallback() {
-        let t = test_context(Some(Box::new(test_stock_str_no_fallback_cb)));
+        let t = test_context(Some(test_stock_str_no_fallback_cb));
        assert_eq!(t.ctx.stock_str(StockMessage::NoMessages), "Hello there");
    }

    #[test]
    fn test_stock_string_repl_str() {
-        let t = dummy_context();
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
        // uses %1$s substitution
        assert_eq!(
-            t.ctx.stock_string_repl_str(StockMessage::Member, "42"),
+            ctx.stock_string_repl_str(StockMessage::Member, "42"),
            "42 member(s)"
        );
        // We have no string using %1$d to test...
@@ -288,38 +290,36 @@ mod tests {

    #[test]
    fn test_stock_string_repl_int() {
-        let t = dummy_context();
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
        assert_eq!(
-            t.ctx.stock_string_repl_int(StockMessage::Member, 42),
+            ctx.stock_string_repl_int(StockMessage::Member, 42),
            "42 member(s)"
        );
    }

    #[test]
    fn test_stock_string_repl_str2() {
-        let t = dummy_context();
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
        assert_eq!(
-            t.ctx
-                .stock_string_repl_str2(StockMessage::ServerResponse, "foo", "bar"),
+            ctx.stock_string_repl_str2(StockMessage::ServerResponse, "foo", "bar"),
            "Response from foo: bar"
        );
    }

    #[test]
    fn test_stock_system_msg_simple() {
-        let t = dummy_context();
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
        assert_eq!(
-            t.ctx
-                .stock_system_msg(StockMessage::MsgLocationEnabled, "", "", 0),
+            ctx.stock_system_msg(StockMessage::MsgLocationEnabled, "", "", 0),
            "Location streaming enabled."
        )
    }

    #[test]
    fn test_stock_system_msg_add_member_by_me() {
-        let t = dummy_context();
+        let ctx = dc_context_new(None, std::ptr::null_mut(), None);
        assert_eq!(
-            t.ctx.stock_system_msg(
+            ctx.stock_system_msg(
                StockMessage::MsgAddMember,
                "alice@example.com",
                "",
--- a/src/test_utils.rs
+++ b/src/test_utils.rs
@@ -2,14 +2,16 @@
 //!
 //! This module is only compiled for test runs.

+use std::ffi::CStr;
+
 use libc::uintptr_t;
 use tempfile::{tempdir, TempDir};

 use crate::config::Config;
-use crate::constants::KeyType;
-use crate::context::{Context, ContextCallback};
-use crate::events::Event;
+use crate::constants::{Event, KeyType};
+use crate::context::{dc_context_new, dc_open, Context};
 use crate::key;
+use crate::types::dc_callback_t;

 /// A Context and temporary directory.
 ///
@@ -26,15 +28,18 @@ pub struct TestContext {
 /// "db.sqlite" in the [TestContext.dir] directory.
 ///
 /// [Context]: crate::context::Context
-pub fn test_context(callback: Option<Box<ContextCallback>>) -> TestContext {
-    let dir = tempdir().unwrap();
-    let dbfile = dir.path().join("db.sqlite");
-    let cb: Box<ContextCallback> = match callback {
-        Some(cb) => cb,
-        None => Box::new(|_, _| 0),
-    };
-    let ctx = Context::new(cb, "FakeOs".into(), dbfile).unwrap();
-    TestContext { ctx: ctx, dir: dir }
+pub fn test_context(cb: Option<dc_callback_t>) -> TestContext {
+    unsafe {
+        let mut ctx = dc_context_new(cb, std::ptr::null_mut(), None);
+        let dir = tempdir().unwrap();
+        let dbfile = dir.path().join("db.sqlite");
+        assert!(
+            dc_open(&mut ctx, dbfile.to_str().unwrap(), None),
+            "Failed to open {}",
+            dbfile.display(),
+        );
+        TestContext { ctx: ctx, dir: dir }
+    }
 }

 /// Return a dummy [TestContext].
@@ -46,11 +51,17 @@ pub fn dummy_context() -> TestContext {
    test_context(None)
 }

-pub fn logging_cb(_ctx: &Context, evt: Event) -> uintptr_t {
+pub unsafe extern "C" fn logging_cb(
+    _ctx: &Context,
+    evt: Event,
+    _d1: uintptr_t,
+    d2: uintptr_t,
+) -> uintptr_t {
+    let to_str = |x| CStr::from_ptr(x as *const libc::c_char).to_str().unwrap();
    match evt {
-        Event::Info(msg) => println!("I: {}", msg),
-        Event::Warning(msg) => println!("W: {}", msg),
-        Event::Error(msg) => println!("E: {}", msg),
+        Event::INFO => println!("I: {}", to_str(d2)),
+        Event::WARNING => println!("W: {}", to_str(d2)),
+        Event::ERROR => println!("E: {}", to_str(d2)),
        _ => (),
    }
    0
--- a/src/token.rs
+++ b/src/token.rs
@@ -1,57 +0,0 @@
-//! Functions to read/write token from/to the database. A token is any string associated with a key.
-
-use deltachat_derive::*;
-
-use crate::context::Context;
-use crate::dc_tools::*;
-use crate::sql;
-
-// Token namespaces
-#[derive(Debug, Display, Clone, Copy, PartialEq, Eq, FromPrimitive, ToPrimitive, ToSql, FromSql)]
-#[repr(i32)]
-pub enum Namespace {
-    Unknown = 0,
-    Auth = 110,
-    InviteNumber = 100,
-}
-
-impl Default for Namespace {
-    fn default() -> Self {
-        Namespace::Unknown
-    }
-}
-
-pub fn save(context: &Context, namespace: Namespace, foreign_id: u32) -> String {
-    // foreign_id may be 0
-    let token = dc_create_id();
-    sql::execute(
-        context,
-        &context.sql,
-        "INSERT INTO tokens (namespc, foreign_id, token, timestamp) VALUES (?, ?, ?, ?);",
-        params![namespace, foreign_id as i32, &token, time()],
-    )
-    .ok();
-    token
-}
-
-pub fn lookup(context: &Context, namespace: Namespace, foreign_id: u32) -> Option<String> {
-    context.sql.query_get_value::<_, String>(
-        context,
-        "SELECT token FROM tokens WHERE namespc=? AND foreign_id=?;",
-        params![namespace, foreign_id as i32],
-    )
-}
-
-pub fn lookup_or_new(context: &Context, namespace: Namespace, foreign_id: u32) -> String {
-    lookup(context, namespace, foreign_id).unwrap_or_else(|| save(context, namespace, foreign_id))
-}
-
-pub fn exists(context: &Context, namespace: Namespace, token: &str) -> bool {
-    context
-        .sql
-        .exists(
-            "SELECT id FROM tokens WHERE namespc=? AND token=?;",
-            params![namespace, token],
-        )
-        .unwrap_or_default()
-}
--- a/src/top_evil_rs.py
+++ b/src/top_evil_rs.py
@@ -6,15 +6,13 @@ import os
 import re

 if __name__ == "__main__":
-    if Path('src/top_evil_rs.py').exists():
-        os.chdir('src')
    filestats = []
    for fn in Path(".").glob("**/*.rs"):
        s = fn.read_text()
        s = re.sub(r"(?m)///.*$", "", s)  # remove comments
        unsafe = s.count("unsafe")
        free = s.count("free(")
-        gotoblocks = s.count("ok_to_continue") + s.count('OK_TO_CONTINUE')
+        gotoblocks = s.count("ok_to_continue")
        filestats.append((fn, unsafe, free, gotoblocks))

    sum_unsafe, sum_free, sum_gotoblocks = 0, 0, 0
--- a/src/types.rs
+++ b/src/types.rs
@@ -0,0 +1,43 @@
+#![allow(non_camel_case_types)]
+use crate::constants::Event;
+use crate::context::Context;
+
+pub use mmime::clist::*;
+pub use rusqlite::ffi::*;
+
+/// Callback function that should be given to dc_context_new().
+///
+/// @memberof Context
+/// @param context The context object as returned by dc_context_new().
+/// @param event one of the @ref DC_EVENT constants
+/// @param data1 depends on the event parameter
+/// @param data2 depends on the event parameter
+/// @return return 0 unless stated otherwise in the event parameter documentation
+pub type dc_callback_t =
+    unsafe extern "C" fn(_: &Context, _: Event, _: uintptr_t, _: uintptr_t) -> uintptr_t;
+
+pub type dc_receive_imf_t = unsafe fn(
+    _: &Context,
+    _: *const libc::c_char,
+    _: size_t,
+    _: &str,
+    _: uint32_t,
+    _: uint32_t,
+) -> ();
+
+/* Purpose: Reading from IMAP servers with no dependencies to the database.
+Context is only used for logging and to get information about
+the online state. */
+
+pub type dc_precheck_imf_t =
+    unsafe fn(_: &Context, _: *const libc::c_char, _: &str, _: u32) -> libc::c_int;
+pub type dc_set_config_t = fn(_: &Context, _: &str, _: Option<&str>) -> ();
+pub type dc_get_config_t = fn(_: &Context, _: &str) -> Option<String>;
+
+pub type int32_t = i32;
+pub type uintptr_t = libc::uintptr_t;
+pub type size_t = libc::size_t;
+pub type uint32_t = libc::c_uint;
+pub type uint8_t = libc::c_uchar;
+pub type uint16_t = libc::c_ushort;
+pub type uint64_t = u64;
--- a/tests/stress.rs
+++ b/tests/stress.rs
@@ -1,21 +1,24 @@
 //! Stress some functions for testing; if used as a lib, this file is obsolete.

 use std::collections::HashSet;
+use std::ffi::CString;
 use std::ptr;

 use tempfile::{tempdir, TempDir};

 use deltachat::chat::{self, Chat};
 use deltachat::config;
+use deltachat::constants::*;
 use deltachat::contact::*;
 use deltachat::context::*;
 use deltachat::dc_imex::*;
 use deltachat::dc_tools::*;
+use deltachat::key::*;
 use deltachat::keyring::*;
 use deltachat::oauth2::*;
 use deltachat::pgp::*;
+use deltachat::types::*;
 use deltachat::x::*;
-use deltachat::Event;
 use libc;

 /* some data used for testing
@@ -29,99 +32,103 @@ static mut S_EM_SETUPFILE: *const libc::c_char =
        as *const u8 as *const libc::c_char;

 unsafe fn stress_functions(context: &Context) {
-    if dc_file_exist(context, "$BLOBDIR/foobar")
-        || dc_file_exist(context, "$BLOBDIR/dada")
-        || dc_file_exist(context, "$BLOBDIR/foobar.dadada")
-        || dc_file_exist(context, "$BLOBDIR/foobar-folder")
-    {
-        dc_delete_file(context, "$BLOBDIR/foobar");
-        dc_delete_file(context, "$BLOBDIR/dada");
-        dc_delete_file(context, "$BLOBDIR/foobar.dadada");
-        dc_delete_file(context, "$BLOBDIR/foobar-folder");
-    }
-    dc_write_file(
-        context,
-        b"$BLOBDIR/foobar\x00" as *const u8 as *const libc::c_char,
-        b"content\x00" as *const u8 as *const libc::c_char as *const libc::c_void,
-        7,
-    );
-    assert!(dc_file_exist(context, "$BLOBDIR/foobar",));
-    assert!(!dc_file_exist(context, "$BLOBDIR/foobarx"));
-    assert_eq!(dc_get_filebytes(context, "$BLOBDIR/foobar",), 7);
-
-    let abs_path = context
-        .get_blobdir()
-        .join("foobar")
-        .to_string_lossy()
-        .to_string();
-
-    assert!(dc_is_blobdir_path(context, &abs_path));
-    assert!(dc_is_blobdir_path(context, "$BLOBDIR/fofo",));
-    assert!(!dc_is_blobdir_path(context, "/BLOBDIR/fofo",));
-    assert!(dc_file_exist(context, &abs_path));
-
-    assert!(dc_copy_file(context, "$BLOBDIR/foobar", "$BLOBDIR/dada",));
-    assert_eq!(dc_get_filebytes(context, "$BLOBDIR/dada",), 7);
-
-    let mut buf: *mut libc::c_void = ptr::null_mut();
-    let mut buf_bytes: libc::size_t = 0;
-
-    assert_eq!(
-        dc_read_file(
+    if 0 != dc_is_open(context) {
+        if dc_file_exist(context, "$BLOBDIR/foobar")
+            || dc_file_exist(context, "$BLOBDIR/dada")
+            || dc_file_exist(context, "$BLOBDIR/foobar.dadada")
+            || dc_file_exist(context, "$BLOBDIR/foobar-folder")
+        {
+            dc_delete_file(context, "$BLOBDIR/foobar");
+            dc_delete_file(context, "$BLOBDIR/dada");
+            dc_delete_file(context, "$BLOBDIR/foobar.dadada");
+            dc_delete_file(context, "$BLOBDIR/foobar-folder");
+        }
+        dc_write_file(
            context,
-            b"$BLOBDIR/dada\x00" as *const u8 as *const libc::c_char,
-            &mut buf,
-            &mut buf_bytes,
-        ),
-        1
-    );
-    assert_eq!(buf_bytes, 7);
-    assert_eq!(
-        std::str::from_utf8(std::slice::from_raw_parts(buf as *const u8, buf_bytes)).unwrap(),
-        "content"
-    );
+            b"$BLOBDIR/foobar\x00" as *const u8 as *const libc::c_char,
+            b"content\x00" as *const u8 as *const libc::c_char as *const libc::c_void,
+            7i32 as size_t,
+        );
+        assert!(dc_file_exist(context, "$BLOBDIR/foobar",));
+        assert!(!dc_file_exist(context, "$BLOBDIR/foobarx"));
+        assert_eq!(
+            dc_get_filebytes(context, "$BLOBDIR/foobar",),
+            7i32 as libc::c_ulonglong
+        );

-    free(buf as *mut _);
-    assert!(dc_delete_file(context, "$BLOBDIR/foobar"));
-    assert!(dc_delete_file(context, "$BLOBDIR/dada"));
-    assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder"));
-    assert!(dc_file_exist(context, "$BLOBDIR/foobar-folder",));
-    assert!(!dc_delete_file(context, "$BLOBDIR/foobar-folder"));
-    let fn0: *mut libc::c_char = dc_get_fine_pathNfilename(
-        context,
-        b"$BLOBDIR\x00" as *const u8 as *const libc::c_char,
-        b"foobar.dadada\x00" as *const u8 as *const libc::c_char,
-    );
-    assert!(!fn0.is_null());
-    assert_eq!(
-        strcmp(
+        let abs_path: *mut libc::c_char = dc_mprintf(
+            b"%s/%s\x00" as *const u8 as *const libc::c_char,
+            context.get_blobdir(),
+            b"foobar\x00" as *const u8 as *const libc::c_char,
+        );
+        assert!(dc_is_blobdir_path(context, as_str(abs_path)));
+        assert!(dc_is_blobdir_path(context, "$BLOBDIR/fofo",));
+        assert!(!dc_is_blobdir_path(context, "/BLOBDIR/fofo",));
+        assert!(dc_file_exist(context, as_path(abs_path)));
+        free(abs_path as *mut libc::c_void);
+        assert!(dc_copy_file(context, "$BLOBDIR/foobar", "$BLOBDIR/dada",));
+        assert_eq!(dc_get_filebytes(context, "$BLOBDIR/dada",), 7);
+
+        let mut buf: *mut libc::c_void = ptr::null_mut();
+        let mut buf_bytes: size_t = 0;
+
+        assert_eq!(
+            dc_read_file(
+                context,
+                b"$BLOBDIR/dada\x00" as *const u8 as *const libc::c_char,
+                &mut buf,
+                &mut buf_bytes,
+            ),
+            1
+        );
+        assert_eq!(buf_bytes, 7);
+        assert_eq!(
+            std::str::from_utf8(std::slice::from_raw_parts(buf as *const u8, buf_bytes)).unwrap(),
+            "content"
+        );
+
+        free(buf as *mut _);
+        assert!(dc_delete_file(context, "$BLOBDIR/foobar"));
+        assert!(dc_delete_file(context, "$BLOBDIR/dada"));
+        assert!(dc_create_folder(context, "$BLOBDIR/foobar-folder"));
+        assert!(dc_file_exist(context, "$BLOBDIR/foobar-folder",));
+        assert!(dc_delete_file(context, "$BLOBDIR/foobar-folder"));
+        let fn0: *mut libc::c_char = dc_get_fine_pathNfilename(
+            context,
+            b"$BLOBDIR\x00" as *const u8 as *const libc::c_char,
+            b"foobar.dadada\x00" as *const u8 as *const libc::c_char,
+        );
+        assert!(!fn0.is_null());
+        assert_eq!(
+            strcmp(
+                fn0,
+                b"$BLOBDIR/foobar.dadada\x00" as *const u8 as *const libc::c_char,
+            ),
+            0
+        );
+        dc_write_file(
+            context,
            fn0,
-            b"$BLOBDIR/foobar.dadada\x00" as *const u8 as *const libc::c_char,
-        ),
-        0
-    );
-    dc_write_file(
-        context,
-        fn0,
-        b"content\x00" as *const u8 as *const libc::c_char as *const libc::c_void,
-        7,
-    );
-    let fn1: *mut libc::c_char = dc_get_fine_pathNfilename(
-        context,
-        b"$BLOBDIR\x00" as *const u8 as *const libc::c_char,
-        b"foobar.dadada\x00" as *const u8 as *const libc::c_char,
-    );
-    assert!(!fn1.is_null());
-    assert_eq!(
-        strcmp(
-            fn1,
-            b"$BLOBDIR/foobar-1.dadada\x00" as *const u8 as *const libc::c_char,
-        ),
-        0
-    );
-    assert!(dc_delete_file(context, as_path(fn0)));
-    free(fn0 as *mut libc::c_void);
-    free(fn1 as *mut libc::c_void);
+            b"content\x00" as *const u8 as *const libc::c_char as *const libc::c_void,
+            7i32 as size_t,
+        );
+        let fn1: *mut libc::c_char = dc_get_fine_pathNfilename(
+            context,
+            b"$BLOBDIR\x00" as *const u8 as *const libc::c_char,
+            b"foobar.dadada\x00" as *const u8 as *const libc::c_char,
+        );
+        assert!(!fn1.is_null());
+        assert_eq!(
+            strcmp(
+                fn1,
+                b"$BLOBDIR/foobar-1.dadada\x00" as *const u8 as *const libc::c_char,
+            ),
+            0
+        );
+        assert!(dc_delete_file(context, as_path(fn0)));
+        free(fn0 as *mut libc::c_void);
+        free(fn1 as *mut libc::c_void);
+    }

    let res = context.get_config(config::Config::SysConfigKeys).unwrap();

@@ -455,114 +462,175 @@ unsafe fn stress_functions(context: &Context) {
 #[test]
 #[ignore] // is too expensive
 fn test_encryption_decryption() {
-    let (public_key, private_key) = dc_pgp_create_keypair("foo@bar.de").unwrap();
+    unsafe {
+        let mut bad_data: [libc::c_uchar; 4096] = [0; 4096];
+        let mut i_0: libc::c_int = 0i32;
+        while i_0 < 4096i32 {
+            bad_data[i_0 as usize] = (i_0 & 0xffi32) as libc::c_uchar;
+            i_0 += 1
+        }
+        let mut j: libc::c_int = 0i32;

-    private_key.split_key().unwrap();
+        while j < 4096 / 40 {
+            let bad_key = Key::from_binary(
+                &mut *bad_data.as_mut_ptr().offset(j as isize) as *const u8,
+                4096 / 2 + j,
+                if 0 != j & 1 {
+                    KeyType::Public
+                } else {
+                    KeyType::Private
+                },
+            );

-    let (public_key2, private_key2) = dc_pgp_create_keypair("two@zwo.de").unwrap();
+            assert!(bad_key.is_none());
+            j += 1
+        }

-    assert_ne!(public_key, public_key2);
+        let (public_key, private_key) = dc_pgp_create_keypair("foo@bar.de").unwrap();

-    let original_text = b"This is a test";
-    let mut keyring = Keyring::default();
-    keyring.add_owned(public_key.clone());
-    keyring.add_ref(&public_key2);
+        private_key.split_key().unwrap();

-    let ctext_signed = dc_pgp_pk_encrypt(original_text, &keyring, Some(&private_key)).unwrap();
-    assert!(!ctext_signed.is_empty());
-    assert!(ctext_signed.starts_with("-----BEGIN PGP MESSAGE-----"));
+        let (public_key2, private_key2) = dc_pgp_create_keypair("two@zwo.de").unwrap();

-    let ctext_unsigned = dc_pgp_pk_encrypt(original_text, &keyring, None).unwrap();
-    assert!(!ctext_unsigned.is_empty());
-    assert!(ctext_unsigned.starts_with("-----BEGIN PGP MESSAGE-----"));
+        assert_ne!(public_key, public_key2);

-    let mut keyring = Keyring::default();
-    keyring.add_owned(private_key);
+        let original_text: *const libc::c_char =
+            b"This is a test\x00" as *const u8 as *const libc::c_char;
+        let mut keyring = Keyring::default();
+        keyring.add_owned(public_key.clone());
+        keyring.add_ref(&public_key2);

-    let mut public_keyring = Keyring::default();
-    public_keyring.add_ref(&public_key);
+        let ctext = dc_pgp_pk_encrypt(
+            original_text as *const libc::c_void,
+            strlen(original_text),
+            &keyring,
+            Some(&private_key),
+        )
+        .unwrap();

-    let mut public_keyring2 = Keyring::default();
-    public_keyring2.add_owned(public_key2.clone());
+        assert!(!ctext.is_empty());
+        assert!(ctext.starts_with("-----BEGIN PGP MESSAGE-----"));

-    let mut valid_signatures: HashSet<String> = Default::default();
+        let ctext_signed_bytes = ctext.len();
+        let ctext_signed = CString::yolo(ctext);

-    let plain = dc_pgp_pk_decrypt(
-        ctext_signed.as_bytes(),
-        &keyring,
-        &public_keyring,
-        Some(&mut valid_signatures),
-    )
-    .unwrap();
+        let ctext = dc_pgp_pk_encrypt(
+            original_text as *const libc::c_void,
+            strlen(original_text),
+            &keyring,
+            None,
+        )
+        .unwrap();
+        assert!(!ctext.is_empty());
+        assert!(ctext.starts_with("-----BEGIN PGP MESSAGE-----"));

-    assert_eq!(plain, original_text,);
-    assert_eq!(valid_signatures.len(), 1);
+        let ctext_unsigned_bytes = ctext.len();
+        let ctext_unsigned = CString::yolo(ctext);

-    valid_signatures.clear();
+        let mut keyring = Keyring::default();
+        keyring.add_owned(private_key);

-    let empty_keyring = Keyring::default();
-    let plain = dc_pgp_pk_decrypt(
-        ctext_signed.as_bytes(),
-        &keyring,
-        &empty_keyring,
-        Some(&mut valid_signatures),
-    )
-    .unwrap();
-    assert_eq!(plain, original_text);
-    assert_eq!(valid_signatures.len(), 0);
+        let mut public_keyring = Keyring::default();
+        public_keyring.add_ref(&public_key);

-    valid_signatures.clear();
+        let mut public_keyring2 = Keyring::default();
+        public_keyring2.add_owned(public_key2.clone());

-    let plain = dc_pgp_pk_decrypt(
-        ctext_signed.as_bytes(),
-        &keyring,
-        &public_keyring2,
-        Some(&mut valid_signatures),
-    )
-    .unwrap();
-    assert_eq!(plain, original_text);
-    assert_eq!(valid_signatures.len(), 0);
+        let mut valid_signatures: HashSet<String> = Default::default();

-    valid_signatures.clear();
+        let plain = dc_pgp_pk_decrypt(
+            ctext_signed.as_ptr() as *const _,
+            ctext_signed_bytes,
+            &keyring,
+            &public_keyring,
+            Some(&mut valid_signatures),
+        )
+        .unwrap();

-    public_keyring2.add_ref(&public_key);
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+        assert_eq!(valid_signatures.len(), 1);

-    let plain = dc_pgp_pk_decrypt(
-        ctext_signed.as_bytes(),
-        &keyring,
-        &public_keyring2,
-        Some(&mut valid_signatures),
-    )
-    .unwrap();
-    assert_eq!(plain, original_text);
-    assert_eq!(valid_signatures.len(), 1);
+        valid_signatures.clear();

-    valid_signatures.clear();
+        let empty_keyring = Keyring::default();
+        let plain = dc_pgp_pk_decrypt(
+            ctext_signed.as_ptr() as *const _,
+            ctext_signed_bytes,
+            &keyring,
+            &empty_keyring,
+            Some(&mut valid_signatures),
+        )
+        .unwrap();
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+        assert_eq!(valid_signatures.len(), 0);

-    let plain = dc_pgp_pk_decrypt(
-        ctext_unsigned.as_bytes(),
-        &keyring,
-        &public_keyring,
-        Some(&mut valid_signatures),
-    )
-    .unwrap();
+        valid_signatures.clear();

-    assert_eq!(plain, original_text);
+        let plain = dc_pgp_pk_decrypt(
+            ctext_signed.as_ptr() as *const _,
+            ctext_signed_bytes,
+            &keyring,
+            &public_keyring2,
+            Some(&mut valid_signatures),
+        )
+        .unwrap();
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+        assert_eq!(valid_signatures.len(), 0);

-    valid_signatures.clear();
+        valid_signatures.clear();

-    let mut keyring = Keyring::default();
-    keyring.add_ref(&private_key2);
-    let mut public_keyring = Keyring::default();
-    public_keyring.add_ref(&public_key);
+        public_keyring2.add_ref(&public_key);

-    let plain =
-        dc_pgp_pk_decrypt(ctext_signed.as_bytes(), &keyring, &public_keyring, None).unwrap();
+        let plain = dc_pgp_pk_decrypt(
+            ctext_signed.as_ptr() as *const _,
+            ctext_signed_bytes,
+            &keyring,
+            &public_keyring2,
+            Some(&mut valid_signatures),
+        )
+        .unwrap();
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+        assert_eq!(valid_signatures.len(), 1);

-    assert_eq!(plain, original_text);
+        valid_signatures.clear();
+
+        let plain = dc_pgp_pk_decrypt(
+            ctext_unsigned.as_ptr() as *const _,
+            ctext_unsigned_bytes,
+            &keyring,
+            &public_keyring,
+            Some(&mut valid_signatures),
+        )
+        .unwrap();
+
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+
+        valid_signatures.clear();
+
+        let mut keyring = Keyring::default();
+        keyring.add_ref(&private_key2);
+        let mut public_keyring = Keyring::default();
+        public_keyring.add_ref(&public_key);
+
+        let plain = dc_pgp_pk_decrypt(
+            ctext_signed.as_ptr() as *const _,
+            ctext_signed_bytes,
+            &keyring,
+            &public_keyring,
+            None,
+        )
+        .unwrap();
+
+        assert_eq!(std::str::from_utf8(&plain).unwrap(), as_str(original_text),);
+    }
 }

-fn cb(_context: &Context, _event: Event) -> libc::uintptr_t {
+unsafe extern "C" fn cb(
+    _context: &Context,
+    _event: Event,
+    _data1: uintptr_t,
+    _data2: uintptr_t,
+) -> uintptr_t {
    0
 }

@@ -572,16 +640,21 @@ struct TestContext {
    dir: TempDir,
 }

-fn create_test_context() -> TestContext {
+unsafe fn create_test_context() -> TestContext {
+    let mut ctx = dc_context_new(Some(cb), std::ptr::null_mut(), None);
    let dir = tempdir().unwrap();
    let dbfile = dir.path().join("db.sqlite");
-    let ctx = Context::new(Box::new(cb), "FakeOs".into(), dbfile).unwrap();
+    assert!(
+        dc_open(&mut ctx, dbfile.to_str().unwrap(), None),
+        "Failed to open {}",
+        dbfile.display()
+    );
    TestContext { ctx: ctx, dir: dir }
 }

 #[test]
 fn test_dc_get_oauth2_url() {
-    let ctx = create_test_context();
+    let ctx = unsafe { create_test_context() };
    let addr = "dignifiedquire@gmail.com";
    let redirect_uri = "chat.delta:/com.b44t.messenger";
    let res = dc_get_oauth2_url(&ctx.ctx, addr, redirect_uri);
@@ -591,7 +664,7 @@ fn test_dc_get_oauth2_url() {

 #[test]
 fn test_dc_get_oauth2_addr() {
-    let ctx = create_test_context();
+    let ctx = unsafe { create_test_context() };
    let addr = "dignifiedquire@gmail.com";
    let code = "fail";
    let res = dc_get_oauth2_addr(&ctx.ctx, addr, code);
@@ -601,7 +674,7 @@ fn test_dc_get_oauth2_addr() {

 #[test]
 fn test_dc_get_oauth2_token() {
-    let ctx = create_test_context();
+    let ctx = unsafe { create_test_context() };
    let addr = "dignifiedquire@gmail.com";
    let code = "fail";
    let res = dc_get_oauth2_access_token(&ctx.ctx, addr, code, 0);
@@ -619,33 +692,50 @@ fn test_stress_tests() {

 #[test]
 fn test_get_contacts() {
-    let context = create_test_context();
-    let contacts = Contact::get_all(&context.ctx, 0, Some("some2")).unwrap();
-    assert_eq!(contacts.len(), 0);
+    unsafe {
+        let context = create_test_context();
+        let contacts = Contact::get_all(&context.ctx, 0, Some("some2")).unwrap();
+        assert_eq!(contacts.len(), 0);

-    let id = Contact::create(&context.ctx, "bob", "bob@mail.de").unwrap();
-    assert_ne!(id, 0);
+        let id = Contact::create(&context.ctx, "bob", "bob@mail.de").unwrap();
+        assert_ne!(id, 0);

-    let contacts = Contact::get_all(&context.ctx, 0, Some("bob")).unwrap();
-    assert_eq!(contacts.len(), 1);
+        let contacts = Contact::get_all(&context.ctx, 0, Some("bob")).unwrap();
+        assert_eq!(contacts.len(), 1);

-    let contacts = Contact::get_all(&context.ctx, 0, Some("alice")).unwrap();
-    assert_eq!(contacts.len(), 0);
+        let contacts = Contact::get_all(&context.ctx, 0, Some("alice")).unwrap();
+        assert_eq!(contacts.len(), 0);
+    }
 }

 #[test]
 fn test_chat() {
-    let context = create_test_context();
-    let contact1 = Contact::create(&context.ctx, "bob", "bob@mail.de").unwrap();
-    assert_ne!(contact1, 0);
+    unsafe {
+        let context = create_test_context();
+        let contact1 = Contact::create(&context.ctx, "bob", "bob@mail.de").unwrap();
+        assert_ne!(contact1, 0);

-    let chat_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
-    assert!(chat_id > 9, "chat_id too small {}", chat_id);
-    let chat = Chat::load_from_db(&context.ctx, chat_id).unwrap();
+        let chat_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
+        assert!(chat_id > 9, "chat_id too small {}", chat_id);
+        let chat = Chat::load_from_db(&context.ctx, chat_id).unwrap();

-    let chat2_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
-    assert_eq!(chat2_id, chat_id);
-    let chat2 = Chat::load_from_db(&context.ctx, chat2_id).unwrap();
+        let chat2_id = chat::create_by_contact_id(&context.ctx, contact1).unwrap();
+        assert_eq!(chat2_id, chat_id);
+        let chat2 = Chat::load_from_db(&context.ctx, chat2_id).unwrap();

-    assert_eq!(chat2.name, chat.name);
+        assert_eq!(chat2.name, chat.name);
+    }
+}
+
+#[test]
+fn test_wrong_db() {
+    unsafe {
+        let mut ctx = dc_context_new(Some(cb), std::ptr::null_mut(), None);
+        let dir = tempdir().unwrap();
+        let dbfile = dir.path().join("db.sqlite");
+        std::fs::write(&dbfile, b"123").unwrap();
+
+        let res = dc_open(&mut ctx, dbfile.to_str().unwrap(), None);
+        assert!(!res);
+    }
 }
Author	SHA1	Message	Date
Simon Laux	3f731b0f98	remove macro	2019-09-08 16:57:56 +02:00
Simon Laux	99c5674a10	cargo fmt	2019-09-07 13:26:06 +02:00
Simon Laux	c4fe0316d4	remove closure Co-authored-by: @Jikstra	2019-09-07 13:23:54 +02:00
Simon Laux	176417dc99	fix remove chat profile img	2019-09-07 12:34:56 +02:00