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/*
* Copyright (C) 2003 Nikos Mavroyanopoulos
* Copyright (C) 2004 Free Software Foundation
*
* This file is part of GNUTLS.
*
* The GNUTLS library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <defines.h>
#ifndef HAVE_STRNSTR
# include <string.h>
char *strnstr(const char *haystack, const char *needle, size_t haystacklen)
{
char *p;
ssize_t plen;
ssize_t len = strlen(needle);
if (*needle == '\0') /* everything matches empty string */
return (char*) haystack;
plen = haystacklen;
for (p = (char*) haystack; p != NULL; p = memchr(p + 1, *needle, plen-1)) {
plen = haystacklen - (p - haystack);
if (plen < len) return NULL;
if (strncmp(p, needle, len) == 0)
return (p);
}
return NULL;
}
#endif
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