1 /* Searching a string for a character.
2 Copyright (C) 2007 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2007.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program 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 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software Foundation,
17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
28 /* Locate the first single-byte character C in the character string STRING,
29 and return a pointer to it. Return NULL if C is not found in STRING. */
31 mbschr (const char *string, int c)
35 /* Optimization: We know that ASCII characters < 0x30 don't occur as
36 part of multibyte characters longer than 1 byte. Hence, if c < 0x30,
37 the faster unibyte loop can be used. */
38 && (unsigned char) c >= 0x30)
42 for (mbui_init (iter, string);; mbui_advance (iter))
44 if (mb_len (mbui_cur (iter)) == 1
45 && (unsigned char) * mbui_cur_ptr (iter) == (unsigned char) c)
47 if (!mbui_avail (iter))
50 return (char *) mbui_cur_ptr (iter);
56 return strchr (string, c);