-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
-#include <__NULL.h>
+/* strstr( const char *, const char * )
-char * strstr( const char * src_1, const char * src_2 )
+ This file is part of the Public Domain C Library (PDCLib).
+ Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <string.h>
+
+#ifndef REGTEST
+
+char * strstr( const char * s1, const char * s2 )
{
- const char * p1 = src_1;
+ const char * p1 = s1;
const char * p2;
- while ( *src_1 != '\0' )
+ while ( *s1 )
{
- p2 = src_2;
- while ( ( *p2 != '\0' ) && ( *p1 == *p2 ) )
+ p2 = s2;
+ while ( *p2 && ( *p1 == *p2 ) )
{
++p1;
++p2;
}
- if ( *p2 == '\0' )
+ if ( ! *p2 )
{
- return (char *) src_1;
+ return (char *) s1;
}
- ++src_1;
- p1 = src_1;
+ ++s1;
+ p1 = s1;
}
return NULL;
}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ char s[] = "abcabcabcdabcde";
+ TESTCASE( strstr( s, "x" ) == NULL );
+ TESTCASE( strstr( s, "xyz" ) == NULL );
+ TESTCASE( strstr( s, "a" ) == &s[0] );
+ TESTCASE( strstr( s, "abc" ) == &s[0] );
+ TESTCASE( strstr( s, "abcd" ) == &s[6] );
+ TESTCASE( strstr( s, "abcde" ) == &s[10] );
+ return TEST_RESULTS;
+}
+#endif