File: memstr.c

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/* 
 * $smu-mark$ 
 * $name: memstr.c$ 
 * $author: Salvatore Sanfilippo <antirez@invece.org>$ 
 * $copyright: Copyright (C) 1999 by Salvatore Sanfilippo$ 
 * $license: This software is under GPL version 2 of license$ 
 * $date: Fri Nov  5 11:55:48 MET 1999$ 
 * $rev: 4$ 
 */ 

#include <string.h>
#include <stdlib.h> /* NULL macro */

char *memstr(char *haystack, char *needle, int size)
{
	char *p;
	char needlesize = strlen(needle);

	for (p = haystack; p <= (haystack-needlesize+size); p++)
	{
		if (memcmp(p, needle, needlesize) == 0)
			return p; /* found */
	}
	return NULL;
}