-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
+/* $Id$ */
-#include <__NULL.h>
+/* strrchr( const char *, int c )
-char * strrchr( const char * src, int c )
+ 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 * strrchr( const char * s, int c )
{
- const char * p = src;
- while ( *p != '\0' )
+ size_t i = 0;
+ while ( s[i++] );
+ do
{
- ++p;
- }
- while ( p >= src )
- {
- if ( *p == (char) c )
+ if ( s[--i] == (char) c )
{
- return (char *) p;
+ return (char *) s + i;
}
- --p;
- }
+ } while ( i );
return NULL;
}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+
+int main( void )
+{
+ char abccd[] = "abccd";
+ TESTCASE( strrchr( abcde, '\0' ) == &abcde[5] );
+ TESTCASE( strrchr( abcde, 'e' ) == &abcde[4] );
+ TESTCASE( strrchr( abcde, 'a' ) == &abcde[0] );
+ TESTCASE( strrchr( abccd, 'c' ) == &abccd[3] );
+ return TEST_RESULTS;
+}
+#endif