1 /* Search for some characters in UTF-32 string. 2 Copyright (C) 1999, 2002, 2006, 2009-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2002. 4 5 This file is free software. 6 It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+". 7 You can redistribute it and/or modify it under either 8 - the terms of the GNU Lesser General Public License as published 9 by the Free Software Foundation; either version 3, or (at your 10 option) any later version, or 11 - the terms of the GNU General Public License as published by the 12 Free Software Foundation; either version 2, or (at your option) 13 any later version, or 14 - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+". 15 16 This file is distributed in the hope that it will be useful, 17 but WITHOUT ANY WARRANTY; without even the implied warranty of 18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 19 Lesser General Public License and the GNU General Public License 20 for more details. 21 22 You should have received a copy of the GNU Lesser General Public 23 License and of the GNU General Public License along with this 24 program. If not, see <https://www.gnu.org/licenses/>. */ 25 26 #include <config.h> 27 28 /* Specification. */ 29 #include "unistr.h" 30 31 #define FUNC u32_strcspn 32 #define UNIT uint32_t 33 #define U_STRLEN u32_strlen 34 #define U_STRCHR u32_strchr 35 36 size_t 37 FUNC (const UNIT *str, const UNIT *reject) /* */ 38 { 39 /* Optimize two cases. */ 40 if (reject[0] == 0) 41 return U_STRLEN (str); 42 if (reject[1] == 0) 43 { 44 ucs4_t uc = reject[0]; 45 const UNIT *ptr = str; 46 for (; *ptr != 0; ptr++) 47 if (*ptr == uc) 48 break; 49 return ptr - str; 50 } 51 /* General case. */ 52 { 53 const UNIT *ptr = str; 54 for (; *ptr != 0; ptr++) 55 if (U_STRCHR (reject, *ptr)) 56 break; 57 return ptr - str; 58 } 59 }