You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
60 lines
2.1 KiB
60 lines
2.1 KiB
/* $Id: strstr.c,v 1.1.1.1 2006/09/14 01:59:06 root Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2000-2002 Opsycon AB (www.opsycon.se)
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Opsycon AB.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
|
|
* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
|
|
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*/
|
|
#include <string.h>
|
|
|
|
/** char *strstr(p,q) returns a ptr to q in p, else 0 if not found */
|
|
|
|
char *
|
|
strstr(const char *p, const char *q)
|
|
{
|
|
const char *s, *t;
|
|
|
|
if (!p || !q)
|
|
return (0);
|
|
|
|
if (!*q)
|
|
return ((char *)p);
|
|
for (; *p; p++) {
|
|
if (*p == *q) {
|
|
t = p;
|
|
s = q;
|
|
for (; *t; s++, t++) {
|
|
if (*t != *s)
|
|
break;
|
|
}
|
|
if (!*s)
|
|
return ((char *)p);
|
|
}
|
|
}
|
|
return (0);
|
|
}
|
|
|