remove/push down some unsafe-fn

examples/simple.rs

@@ -35,7 +35,6 @@ fn cb(_ctx: &Context, event: Event) -> usize {
 }
 
 fn main() {
-    unsafe {
     let dir = tempdir().unwrap();
     let dbfile = dir.path().join("db.sqlite");
     println!("creating database {:?}", dbfile);
@@ -85,8 +84,7 @@ fn main() {
     thread::sleep(duration);
 
     println!("sending a message");
-        let contact_id =
-            Contact::create(&ctx, "dignifiedquire", "dignifiedquire@gmail.com").unwrap();
+    let contact_id = Contact::create(&ctx, "dignifiedquire", "dignifiedquire@gmail.com").unwrap();
     let chat_id = chat::create_by_contact_id(&ctx, contact_id).unwrap();
     chat::send_text_msg(&ctx, chat_id, "Hi, here is my first message!".into()).unwrap();
 
@@ -123,5 +121,4 @@ fn main() {
     t2.join().unwrap();
 
     println!("closing");
-    }
 }

src/configure/mod.rs

@@ -27,7 +27,7 @@ macro_rules! progress {
 }
 
 // connect
-pub unsafe fn configure(context: &Context) {
+pub fn configure(context: &Context) {
     if context.has_ongoing() {
         warn!(context, "There is already another ongoing process running.",);
         return;

src/e2ee.rs

@@ -263,7 +263,7 @@ pub fn try_decrypt(
     in_out_message: *mut Mailmime,
 ) -> Result<(bool, HashSet<String>, HashSet<String>)> {
     // just a pointer into mailmime structure, must not be freed
-    let imffields = unsafe { mailmime_find_mailimf_fields(in_out_message) };
+    let imffields = mailmime_find_mailimf_fields(in_out_message);
     ensure!(
         !in_out_message.is_null() && !imffields.is_null(),
         "corrupt invalid mime inputs"

src/wrapmime.rs

@@ -175,21 +175,21 @@ pub fn mailimf_find_field(
 }
 
 /*the result is a pointer to mime, must not be freed*/
-pub unsafe fn mailmime_find_mailimf_fields(mime: *mut Mailmime) -> *mut mailimf_fields {
+pub fn mailmime_find_mailimf_fields(mime: *mut Mailmime) -> *mut mailimf_fields {
     if mime.is_null() {
         return ptr::null_mut();
     }
 
-    match (*mime).mm_type as _ {
+    match unsafe { (*mime).mm_type as _ } {
         MAILMIME_MULTIPLE => {
-            for cur_data in (*(*mime).mm_data.mm_multipart.mm_mp_list).into_iter() {
+            for cur_data in unsafe { (*(*mime).mm_data.mm_multipart.mm_mp_list).into_iter() } {
                 let header = mailmime_find_mailimf_fields(cur_data as *mut _);
                 if !header.is_null() {
                     return header;
                 }
             }
         }
-        MAILMIME_MESSAGE => return (*mime).mm_data.mm_message.mm_fields,
+        MAILMIME_MESSAGE => return unsafe { (*mime).mm_data.mm_message.mm_fields },
         _ => {}
     }