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strstr.c
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C/C++ Source or Header
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2000-12-21
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430b
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29 lines
/*
* linux/lib/string.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
#include <sys/types.h>
#include <string.h>
#include <ctype.h>
#ifndef __HAVE_ARCH_STRSTR
char * strstr(const char * s1,const char * s2)
{
int l1, l2;
l2 = strlen(s2);
if (!l2)
return (char *) s1;
l1 = strlen(s1);
while (l1 >= l2) {
l1--;
if (!memcmp(s1,s2,l2))
return (char *) s1;
s1++;
}
return NULL;
}
#endif