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glibc/wcsmbs/wcsncase.c
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/* Compare at most N wide characters of two strings without taking care | |
for the case. | |
Copyright (C) 1992-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#ifdef HAVE_CONFIG_H | |
# include <config.h> | |
#endif | |
#include <wchar.h> | |
#include <wctype.h> | |
#ifndef weak_alias | |
# define __wcsncasecmp wcsncasecmp | |
# define TOLOWER(Ch) towlower (Ch) | |
#else | |
# ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
# define __wcsncasecmp __wcsncasecmp_l | |
# define TOLOWER(Ch) __towlower_l ((Ch), loc) | |
# else | |
# define TOLOWER(Ch) towlower (Ch) | |
# endif | |
#endif | |
#ifdef USE_IN_EXTENDED_LOCALE_MODEL | |
# define LOCALE_PARAM , __locale_t loc | |
#else | |
# define LOCALE_PARAM | |
#endif | |
/* Compare no more than N wide characters of S1 and S2, | |
ignoring case, returning less than, equal to or | |
greater than zero if S1 is lexicographically less | |
than, equal to or greater than S2. */ | |
int | |
__wcsncasecmp (const wchar_t *s1, const wchar_t *s2, size_t n LOCALE_PARAM) | |
{ | |
wint_t c1, c2; | |
if (s1 == s2 || n == 0) | |
return 0; | |
do | |
{ | |
c1 = (wint_t) TOLOWER (*s1++); | |
c2 = (wint_t) TOLOWER (*s2++); | |
if (c1 == L'\0' || c1 != c2) | |
return c1 - c2; | |
} while (--n > 0); | |
return c1 - c2; | |
} | |
#ifndef __wcsncasecmp | |
weak_alias (__wcsncasecmp, wcsncasecmp) | |
#endif |