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/* Searching in a string.
Copyright (C) 2001-2003, 2006, 2009-2021 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* The functions defined in this file assume a nearly ASCII compatible
character set. */
#ifdef __cplusplus
extern "C" {
#endif
/* Find the first occurrence of NEEDLE in HAYSTACK.
This function is safe to be called, even in a multibyte locale, if NEEDLE
1. consists solely of printable ASCII characters excluding '\\' and '~'
[this restriction is needed because of Shift_JIS and JOHAB]
or of the control ASCII characters '\a' '\b' '\f' '\n' '\r' '\t' '\v'
[this restriction is needed because of VISCII], and
2. has at least length 2
[this restriction is needed because of BIG5, BIG5-HKSCS, GBK, GB18030,
Shift_JIS, JOHAB], and
3. does not consist entirely of decimal digits, or has at least length 4
[this restriction is needed because of GB18030].
This function is also safe to be called, even in a multibyte locale, if
HAYSTACK and NEEDLE are known to both consist solely of printable ASCII
characters excluding '\\' and '~'. */
extern char *c_strstr (const char *haystack, const char *needle);
#ifdef __cplusplus
}
#endif
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