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Diffstat (limited to 'newlib/libc/string/wmemcmp.c')
| -rw-r--r-- | newlib/libc/string/wmemcmp.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/newlib/libc/string/wmemcmp.c b/newlib/libc/string/wmemcmp.c new file mode 100644 index 000000000..51072942c --- /dev/null +++ b/newlib/libc/string/wmemcmp.c @@ -0,0 +1,88 @@ +/* +FUNCTION + <<wmemcmp>>---compare wide-characters in memory + +ANSI_SYNOPSIS + #include <wchar.h> + int wmemcmp(const wchar_t *<[s1]>, const wchar_t *<[s2]>, size_t <[n]>); + +TRAD_SYNOPSIS + int wmemcmp(<[s1]>, <[s2]>, <[n]> + const wchar_t *<[s1]>; + const wchar_t *<[s2]>; + size_t <[n]>; + +DESCRIPTION + The <<wmemcmp>> function compares the first <[n]> wide-characters of the + object pointed to by <[s1]> to the first <[n]> wide-characters of the + object pointed to by <[s2]>. This function is not affected by locale + and all wchar_t values are treated identically. The null wide-character + and wchar_t values not corresponding to valid characters are not treated + specially. + + If <[n]> is zero, <[s1]> and <[s2]> must be a valid pointers and the + function behaves as if the two objects compare equal. + +RETURNS + The <<wmemcmp>> function returns an integer greater than, equal to, + or less than zero, accordingly as the object pointed to by <[s1]> is + greater than, equal to, or less than the object pointed to by <[s2]>. + +PORTABILITY +<<wmemcmp>> is ISO/IEC 9899/AMD1:1995 (ISO C). +No supporting OS subroutines are required. +*/ + +/* $NetBSD: wmemcmp.c,v 1.1 2000/12/23 23:14:37 itojun Exp $ */ + +/*- + * Copyright (c)1999 Citrus Project, + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * citrus Id: wmemcmp.c,v 1.2 2000/12/20 14:08:31 itojun Exp + */ + +#include <_ansi.h> +#include <wchar.h> + +int +_DEFUN (wmemcmp, (s1, s2, n), + _CONST wchar_t * s1 _AND + _CONST wchar_t * s2 _AND + size_t n) +{ + size_t i; + + for (i = 0; i < n; i++) + { + if (*s1 != *s2) + { + /* wchar might be unsigned */ + return *s1 > *s2 ? 1 : -1; + } + s1++; + s2++; + } + return 0; +} |