105436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Searching a string for the last occurrence of a character. 205436638acc7c010349a69c3395f1a57c642dc62Ying Wang Copyright (C) 2007-2012 Free Software Foundation, Inc. 305436638acc7c010349a69c3395f1a57c642dc62Ying Wang Written by Bruno Haible <bruno@clisp.org>, 2007. 405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 505436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is free software: you can redistribute it and/or modify 605436638acc7c010349a69c3395f1a57c642dc62Ying Wang it under the terms of the GNU General Public License as published by 705436638acc7c010349a69c3395f1a57c642dc62Ying Wang the Free Software Foundation; either version 3 of the License, or 805436638acc7c010349a69c3395f1a57c642dc62Ying Wang (at your option) any later version. 905436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1005436638acc7c010349a69c3395f1a57c642dc62Ying Wang This program is distributed in the hope that it will be useful, 1105436638acc7c010349a69c3395f1a57c642dc62Ying Wang but WITHOUT ANY WARRANTY; without even the implied warranty of 1205436638acc7c010349a69c3395f1a57c642dc62Ying Wang MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1305436638acc7c010349a69c3395f1a57c642dc62Ying Wang GNU General Public License for more details. 1405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1505436638acc7c010349a69c3395f1a57c642dc62Ying Wang You should have received a copy of the GNU General Public License 1605436638acc7c010349a69c3395f1a57c642dc62Ying Wang along with this program. If not, see <http://www.gnu.org/licenses/>. */ 1705436638acc7c010349a69c3395f1a57c642dc62Ying Wang 1805436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <config.h> 1905436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2005436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Specification. */ 2105436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include <string.h> 2205436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2305436638acc7c010349a69c3395f1a57c642dc62Ying Wang#include "mbuiter.h" 2405436638acc7c010349a69c3395f1a57c642dc62Ying Wang 2505436638acc7c010349a69c3395f1a57c642dc62Ying Wang/* Locate the last single-byte character C in the character string STRING, 2605436638acc7c010349a69c3395f1a57c642dc62Ying Wang and return a pointer to it. Return NULL if C is not found in STRING. */ 2705436638acc7c010349a69c3395f1a57c642dc62Ying Wangchar * 2805436638acc7c010349a69c3395f1a57c642dc62Ying Wangmbsrchr (const char *string, int c) 2905436638acc7c010349a69c3395f1a57c642dc62Ying Wang{ 3005436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (MB_CUR_MAX > 1 3105436638acc7c010349a69c3395f1a57c642dc62Ying Wang /* Optimization: We know that ASCII characters < 0x30 don't occur as 3205436638acc7c010349a69c3395f1a57c642dc62Ying Wang part of multibyte characters longer than 1 byte. Hence, if c < 0x30, 3305436638acc7c010349a69c3395f1a57c642dc62Ying Wang the faster unibyte loop can be used. */ 3405436638acc7c010349a69c3395f1a57c642dc62Ying Wang && (unsigned char) c >= 0x30) 3505436638acc7c010349a69c3395f1a57c642dc62Ying Wang { 3605436638acc7c010349a69c3395f1a57c642dc62Ying Wang const char *result = NULL; 3705436638acc7c010349a69c3395f1a57c642dc62Ying Wang mbui_iterator_t iter; 3805436638acc7c010349a69c3395f1a57c642dc62Ying Wang 3905436638acc7c010349a69c3395f1a57c642dc62Ying Wang for (mbui_init (iter, string); mbui_avail (iter); mbui_advance (iter)) 4005436638acc7c010349a69c3395f1a57c642dc62Ying Wang { 4105436638acc7c010349a69c3395f1a57c642dc62Ying Wang if (mb_len (mbui_cur (iter)) == 1 4205436638acc7c010349a69c3395f1a57c642dc62Ying Wang && (unsigned char) * mbui_cur_ptr (iter) == (unsigned char) c) 4305436638acc7c010349a69c3395f1a57c642dc62Ying Wang result = mbui_cur_ptr (iter); 4405436638acc7c010349a69c3395f1a57c642dc62Ying Wang } 4505436638acc7c010349a69c3395f1a57c642dc62Ying Wang return (char *) result; 4605436638acc7c010349a69c3395f1a57c642dc62Ying Wang } 4705436638acc7c010349a69c3395f1a57c642dc62Ying Wang else 4805436638acc7c010349a69c3395f1a57c642dc62Ying Wang return strrchr (string, c); 4905436638acc7c010349a69c3395f1a57c642dc62Ying Wang} 50