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LibC: Implement wmemcmp

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Daniel Bertalan 2021-10-16 09:52:54 +02:00 committed by Linus Groh
parent 685045176b
commit 57f0c12b9a
Notes: sideshowbarker 2024-07-18 02:15:46 +09:00 
Author: https://github.com/BertalanD
Commit: https://github.com/SerenityOS/serenity/commit/57f0c12b9a7
Pull-request: https://github.com/SerenityOS/serenity/pull/9378
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/itamar8910
Reviewed-by: https://github.com/linusg ✅
Reviewed-by: https://github.com/nico
Reviewed-by: https://github.com/timschumi
2 changed files with 10 additions and 0 deletions
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9
Userland/Libraries/LibC/wchar.cpp
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@ -541,4 +541,13 @@ size_t mbsrtowcs(wchar_t* dst, const char** src, size_t len, mbstate_t* ps)
// If we are here, we have written `len` wchars, but not reached the null byte.
return written;
}
int wmemcmp(const wchar_t* s1, const wchar_t* s2, size_t n)
{
while (n-- > 0) {
if (*s1++ != *s2++)
return s1[-1] < s2[-1] ? -1 : 1;
}
return 0;
}
}

1
Userland/Libraries/LibC/wchar.h
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@ -60,5 +60,6 @@ int swprintf(wchar_t*, size_t, const wchar_t*, ...);
int wcwidth(wchar_t);
size_t wcsrtombs(char*, const wchar_t**, size_t, mbstate_t*);
size_t mbsrtowcs(wchar_t*, const char**, size_t, mbstate_t*);
int wmemcmp(const wchar_t*, const wchar_t*, size_t);
__END_DECLS