/* Compare at most N wide characters of two strings without taking care for the case. Copyright (C) 1992-2017 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