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strncasecmp() compares the given number of characters but not after a 0-byte

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This commit is contained in:
B. Petersen
2019-10-09 19:00:54 +02:00
parent de604e744e
commit 3270120d16
1 changed files with 17 additions and 3 deletions
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20
mmime/src/other.rs
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@@ -8,7 +8,7 @@ use crate::mailmime::types_helper::*;
pub(crate) use libc::{
calloc, close, free, isalpha, isdigit, malloc, memcmp, memcpy, memmove, memset, realloc,
strcpy, strlen, strncmp, strncpy,
strcpy, strlen, strncmp, strncpy, strnlen,
};
pub(crate) unsafe fn strcasecmp(s1: *const libc::c_char, s2: *const libc::c_char) -> libc::c_int {
@@ -40,8 +40,14 @@ pub(crate) unsafe fn strncasecmp(
// s1 and s2 might not be null terminated.
let s1_slice = std::slice::from_raw_parts(s1 as *const u8, n);
let s2_slice = std::slice::from_raw_parts(s2 as *const u8, n);
let s1_slice = std::slice::from_raw_parts(
s1 as *const u8,
std::cmp::min(n, strnlen(s1 as *const i8, n)),
);
let s2_slice = std::slice::from_raw_parts(
s2 as *const u8,
std::cmp::min(n, strnlen(s2 as *const i8, n)),
);
let s1 = std::ffi::CStr::from_bytes_with_nul_unchecked(s1_slice)
.to_string_lossy()
@@ -1693,6 +1699,14 @@ mod tests {
4,
)
});
assert_eq!(0, unsafe {
strncasecmp(
CString::new("hell").unwrap().as_ptr(),
CString::new("Hell").unwrap().as_ptr(),
100_000_000,
)
});
}
#[test]