sortix-mirror/libc/wchar/wcsncmp.c

37 lines
1.1 KiB
C

/*
* Copyright (c) 2013, 2014 Jonas 'Sortie' Termansen.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* wchar/wcsncmp.c
* Compares a prefix of two wide strings.
*/
#include <wchar.h>
int wcsncmp(const wchar_t* a, const wchar_t* b, size_t max_count)
{
for ( size_t i = 0; i < max_count; i++ )
{
wint_t ac = (wint_t) a[i];
wint_t bc = (wint_t) b[i];
if ( ac == L'\0' && bc == L'\0' )
return 0;
if ( ac < bc )
return -1;
if ( ac > bc )
return 1;
}
return 0;
}