1 /* Counting the multibyte characters in a string. 2 Copyright (C) 2007-2021 Free Software Foundation, Inc. 3 Written by Bruno Haible <bruno@clisp.org>, 2007. 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 2.1 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 #include <config.h> 19 20 /* Specification. */ 21 #include <string.h> 22 23 #include <stdlib.h> 24 25 #include "mbiter.h" 26 27 /* Return the number of multibyte characters in the character string starting 28 at STRING and ending at STRING + LEN. */ 29 size_t 30 mbsnlen (const char *string, size_t len) /* */ 31 { 32 if (MB_CUR_MAX > 1) 33 { 34 size_t count; 35 mbi_iterator_t iter; 36 37 count = 0; 38 for (mbi_init (iter, string, len); mbi_avail (iter); mbi_advance (iter)) 39 count++; 40 41 return count; 42 } 43 else 44 return len; 45 }