1 /* Copyright (C) 1995-2022 Free Software Foundation, Inc. 2 This file is part of the GNU C Library. 3 4 The GNU C Library is free software; you can redistribute it and/or 5 modify it under the terms of the GNU Lesser General Public 6 License as published by the Free Software Foundation; either 7 version 2.1 of the License, or (at your option) any later version. 8 9 The GNU C Library is distributed in the hope that it will be useful, 10 but WITHOUT ANY WARRANTY; without even the implied warranty of 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 Lesser General Public License for more details. 13 14 You should have received a copy of the GNU Lesser General Public 15 License along with the GNU C Library; if not, see 16 <https://www.gnu.org/licenses/>. */ 17 18 #include <wchar.h> 19 #include <loop_unroll.h> 20 21 #ifndef WCSCHR 22 # define WCSCHR __wcschr 23 #endif 24 25 /* Find the first occurrence of WC in WCS. */ 26 wchar_t * WCSCHR(const wchar_t * wcs,const wchar_t wc)27WCSCHR (const wchar_t *wcs, const wchar_t wc) 28 { 29 wchar_t *dest = NULL; 30 31 #define ITERATION(index) \ 32 ({ \ 33 if (*wcs == wc) \ 34 dest = (wchar_t*) wcs; \ 35 dest == NULL && *wcs++ != L'\0'; \ 36 }) 37 38 #ifndef UNROLL_NTIMES 39 # define UNROLL_NTIMES 1 40 #endif 41 42 while (1) 43 UNROLL_REPEAT (UNROLL_NTIMES, ITERATION); 44 45 return dest; 46 } 47 libc_hidden_def (__wcschr) 48 weak_alias (__wcschr, wcschr) 49 libc_hidden_weak (wcschr) 50