50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
|
/* @(#)strstr.c 1.3 13/11/11 Copyright 1985-2013 J. Schilling */
|
||
|
|
/*
|
||
|
|
* find string s2 in string s1
|
||
|
|
* return NULL if s2 is not found
|
||
|
|
* otherwise return pointer of first occurrence of s2 in s1
|
||
|
|
*
|
||
|
|
* Copyright (c) 1985-2013 J. Schilling
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
* The contents of this file are subject to the terms of the
|
||
|
|
* Common Development and Distribution License, Version 1.0 only
|
||
|
|
* (the "License"). You may not use this file except in compliance
|
||
|
|
* with the License.
|
||
|
|
*
|
||
|
|
* See the file CDDL.Schily.txt in this distribution for details.
|
||
|
|
* A copy of the CDDL is also available via the Internet at
|
||
|
|
* http://www.opensource.org/licenses/cddl1.txt
|
||
|
|
*
|
||
|
|
* When distributing Covered Code, include this CDDL HEADER in each
|
||
|
|
* file and include the License file CDDL.Schily.txt from this distribution.
|
||
|
|
*/
|
||
|
|
#include <schily/standard.h>
|
||
|
|
#include <schily/schily.h>
|
||
|
|
|
||
|
|
#ifndef HAVE_STRSTR
|
||
|
|
|
||
|
|
EXPORT char *
|
||
|
|
strstr(s1, s2)
|
||
|
|
register const char *s1;
|
||
|
|
const char *s2;
|
||
|
|
{
|
||
|
|
register const char *a;
|
||
|
|
register const char *b;
|
||
|
|
|
||
|
|
if (*s2 == '\0')
|
||
|
|
return ((char *)s1);
|
||
|
|
|
||
|
|
for (; *s1 != '\0'; s1++) {
|
||
|
|
for (a = s2, b = s1; *a == *b++; ) {
|
||
|
|
if (*a++ == '\0')
|
||
|
|
return ((char *)s1);
|
||
|
|
}
|
||
|
|
if (*a == '\0')
|
||
|
|
return ((char *)s1);
|
||
|
|
}
|
||
|
|
return ((char *)NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|