+#ifndef REGTEST
+
+char * strrchr( const char * s, int c )
+{
+ size_t i = 0;
+ while ( s[i++] );
+ do
+ {
+ if ( s[--i] == (char) c )
+ {
+ return (char *) s + i;
+ }
+ } 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