--- gvpe/src/slog.h	2003/04/06 04:17:36	1.3
+++ gvpe/src/slog.h	2005/04/26 00:55:56	1.7
@@ -1,9 +1,10 @@
 /*
     slog.h -- logging
-
-    Copyright (C) 2003 Marc Lehmann <pcg@goof.com>
+    Copyright (C) 2003 Marc Lehmann <gvpe@schmorp.de>
  
-    This program is free software; you can redistribute it and/or modify
+    This file is part of GVPE.
+
+    GVPE is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
@@ -14,8 +15,8 @@
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
-    along with this program; if not, write to the Free Software
-    Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+    along with gvpe; if not, write to the Free Software
+    Foundation, Inc. 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */
 
 #ifndef SLOG_H__
@@ -75,6 +76,9 @@
 #endif
 
 extern void fatal (const char *m);
+extern void require_failed (const char *file, int line, const char *info);
+
+#define require(expr) if (!(expr)) require_failed (__FILE__,  __LINE__, #expr)
 
 #endif