-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-
-void perror( const char * s ) { /* TODO */ };
+/* $Id$ */
+
+/* perror( const char * )
+
+ This file is part of the Public Domain C Library (PDCLib).
+ Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+
+#ifndef REGTEST
+
+#include <errno.h>
+#include <locale.h>
+
+/* TODO: Doing this via a static array is not the way to do it. */
+void perror( const char * s )
+{
+ if ( ( s != NULL ) && ( s[0] != '\n' ) )
+ {
+ fprintf( stderr, "%s: ", s );
+ }
+ if ( errno >= _PDCLIB_ERRNO_MAX )
+ {
+ fprintf( stderr, "Unknown error\n" );
+ }
+ else
+ {
+ fprintf( stderr, "%s\n", _PDCLIB_lconv._PDCLIB_errno_texts[errno] );
+ }
+ return;
+}
+
+#endif
+
+#ifdef TEST
+#include <_PDCLIB_test.h>
+#include <stdlib.h>
+#include <string.h>
+#include <limits.h>
+
+int main( void )
+{
+ FILE * fh;
+ unsigned long long max = ULLONG_MAX;
+ char buffer[100];
+ sprintf( buffer, "%llu", max );
+ TESTCASE( ( fh = freopen( testfile, "wb+", stderr ) ) != NULL );
+ TESTCASE( strtol( buffer, NULL, 10 ) == LONG_MAX );
+ perror( "Test" );
+ rewind( fh );
+ TESTCASE( fread( buffer, 1, 7, fh ) == 7 );
+ TESTCASE( memcmp( buffer, "Test: ", 6 ) == 0 );
+ TESTCASE( fclose( fh ) == 0 );
+ TESTCASE( remove( testfile ) == 0 );
+ return TEST_RESULTS;
+}
+
+#endif