59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/*
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* This file is part of the Sofia-SIP package
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*
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* Copyright (C) 2005 Nokia Corporation.
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*
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* Contact: Pekka Pessi <pekka.pessi@nokia.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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/**@internal @file memmem.c
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*
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* @brief Backup implementation of memmem()
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*
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* @author Pekka Pessi <Pekka.Pessi@nokia.com>
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*
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* @date Created: Sat Apr 12 19:32:33 2003 ppessi
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*
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*/
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#include "config.h"
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#include <string.h>
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/* Naive implementation of memmem() */
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void *memmem(const void *haystack, size_t haystacklen,
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const void *needle, size_t needlelen)
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{
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size_t i;
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char const *hs = haystack;
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if (needlelen == 0)
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return (void *)haystack;
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if (needlelen > haystacklen || haystack == NULL || needle == NULL)
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return NULL;
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for (i = 0; i <= haystacklen - needlelen; i++) {
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if (memcmp(hs + i, needle, needlelen) == 0)
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return (void *)(hs + i);
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}
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return NULL;
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}
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