mirror of https://code.videolan.org/videolan/vlc
51 lines
1.6 KiB
C
51 lines
1.6 KiB
C
/*****************************************************************************
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* strnstr.c: BSD strnstr() replacement
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*****************************************************************************
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* Copyright © 2015 VLC authors and VideoLAN
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#include <assert.h>
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char * strnstr (const char *haystack, const char *needle, size_t len)
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{
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assert(needle != NULL);
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const size_t i = strlen(needle);
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if (i == 0) /* corner case (if haystack is NULL, memcmp not allowed) */
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return (char *)haystack;
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if( len < i )
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return NULL;
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size_t count = len - i;
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do
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{
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if( memcmp(haystack, needle, i) == 0 )
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return (char*) haystack;
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haystack++;
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}
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while(count--);
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return NULL;
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}
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