1 /* Search a wide string for any of a set of wide characters. 2 Copyright (C) 1999, 2011-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 1999. 4 5 This file is free software: you can redistribute it and/or modify 6 it under the terms of the GNU Lesser General Public License as 7 published by the Free Software Foundation; either version 3 of the 8 License, or (at your option) any later version. 9 10 This file is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU Lesser General Public License for more details. 14 15 You should have received a copy of the GNU Lesser General Public License 16 along with this program. If not, see <https://www.gnu.org/licenses/>. */ 17 18 size_t 19 wcscspn (const wchar_t *wcs, const wchar_t *reject) /* */ 20 { 21 /* Optimize two cases. */ 22 if (reject[0] == (wchar_t)'\0') 23 return wcslen (wcs); 24 25 if (reject[1] == (wchar_t)'\0') 26 { 27 wchar_t wc = reject[0]; 28 const wchar_t *ptr = wcs; 29 for (; *ptr != (wchar_t)'\0'; ptr++) 30 { 31 if (*ptr == wc) 32 break; 33 } 34 return ptr - wcs; 35 } 36 37 /* General case. */ 38 { 39 const wchar_t *ptr = wcs; 40 for (; *ptr != (wchar_t)'\0'; ptr++) 41 { 42 if (wcschr (reject, *ptr)) 43 break; 44 } 45 return ptr - wcs; 46 } 47 }