1 /* Searching in a string.
2 Copyright (C) 2001-2003, 2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* The functions defined in this file assume a nearly ASCII compatible
27 /* Find the first occurrence of NEEDLE in HAYSTACK.
28 This function is safe to be called, even in a multibyte locale, if NEEDLE
29 1. consists solely of printable ASCII characters excluding '\\' and '~'
30 [this restriction is needed because of Shift_JIS and JOHAB]
31 or of the control ASCII characters '\a' '\b' '\f' '\n' '\r' '\t' '\v'
32 [this restriction is needed because of VISCII], and
33 2. has at least length 2
34 [this restriction is needed because of BIG5, BIG5-HKSCS, GBK, GB18030,
35 Shift_JIS, JOHAB], and
36 3. does not consist entirely of decimal digits, or has at least length 4
37 [this restricion is needed because of GB18030].
38 This function is also safe to be called, even in a multibyte locale, if
39 HAYSTACK and NEEDLE are known to both consist solely of printable ASCII
40 characters excluding '\\' and '~'. */
41 extern char *c_strstr (const char *haystack, const char *needle);