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Diffstat (limited to 'newlib/libc/string/wcscmp.c')
-rw-r--r-- | newlib/libc/string/wcscmp.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/newlib/libc/string/wcscmp.c b/newlib/libc/string/wcscmp.c new file mode 100644 index 000000000..01ccf926c --- /dev/null +++ b/newlib/libc/string/wcscmp.c @@ -0,0 +1,83 @@ +/* +FUNCTION + <<wcscmp>>---compare two wide-character strings + +ANSI_SYNOPSIS + #include <wchar.h> + int wcscmp(const wchar_t *<[s1]>, *<[s2]>); + +TRAD_SYNOPSIS + int wcscmp(<[s1]>, <[s2]> + const wchar_t *<[s1]>, <[s2]>; + +DESCRIPTION + The <<wcscmp>> function compares the wide-character string pointed to + by <[s1]> to the wide-character string pointed to by <[s2]>. + + The sign of a non-zero return value is determined by the sign of the + difference between the values of the first pair of wide-character codes + that differ in the objects being compared. + +RETURNS + Upon completion, <<wcscmp>> returns an integer greater than, equal to + or less than 0, if the wide-character string pointed to by <[s1]> is + greater than, equal to or less than the wide-character string pointed + to by <[s2]> respectively. + +PORTABILITY +<<wcscmp>> is ISO/IEC 9899/AMD1:1995 (ISO C). +No supporting OS subroutines are required. +*/ + +/* $NetBSD$ */ + +/*- + * Copyright (c) 1990, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Chris Torek. + * + * 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. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. + */ + +#include <_ansi.h> +#include <wchar.h> + +/* + * Compare strings. + */ +int +_DEFUN (wcscmp, (s1, s2), + _CONST wchar_t * s1 _AND + _CONST wchar_t * s2) +{ + + while (*s1 == *s2++) + if (*s1++ == 0) + return (0); + /* XXX assumes wchar_t = short */ + return (*(_CONST unsigned short *) s1 - *(_CONST unsigned short *) --s2); +} |