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fix: memcmp() was comparing in reverse lmao

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This commit is contained in:
Mark Poliakov 2021-11-28 00:47:45 +02:00
parent 61a92920c2
commit ed51f233ee
1 changed files with 6 additions and 5 deletions
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11
libsys/src/mem.rs
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@ -28,15 +28,16 @@ pub unsafe extern "C" fn memcpy(dst: *mut u8, src: *const u8, mut len: usize) ->
/// Unsafe: performs reads from arbitrary memory locations, performs no
/// pointer validation.
#[no_mangle]
pub unsafe extern "C" fn memcmp(a: *mut u8, b: *mut u8, mut len: usize) -> isize {
while len != 0 {
len -= 1;
if *a.add(len) < *b.add(len) {
pub unsafe extern "C" fn memcmp(a: *mut u8, b: *mut u8, len: usize) -> isize {
let mut off = 0;
while off != len {
if *a.add(off) < *b.add(off) {
return -1;
}
if *a.add(len) > *b.add(len) {
if *a.add(off) > *b.add(off) {
return 1;
}
off += 1;
}
0
}