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/******************************************************************************
* Copyright (c) 2004, 2008 IBM Corporation
* All rights reserved.
* This program and the accompanying materials
* are made available under the terms of the BSD License
* which accompanies this distribution, and is available at
* http://www.opensource.org/licenses/bsd-license.php
*
* Contributors:
* IBM Corporation - initial implementation
*****************************************************************************/
#include <stddef.h>
size_t strlen(const char *s);
int strncmp(const char *s1, const char *s2, size_t n);
char *strstr(const char *hay, const char *needle);
char *strstr(const char *hay, const char *needle)
{
char *pos;
size_t hlen, nlen;
if (hay == NULL || needle == NULL)
return NULL;
hlen = strlen(hay);
nlen = strlen(needle);
if (nlen < 1)
return (char *)hay;
for (pos = (char *)hay; pos < hay + hlen; pos++) {
if (strncmp(pos, needle, nlen) == 0) {
return pos;
}
}
return NULL;
}
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