[Core] add a lasso_error_t typedef

This typedef will serve to mark error returning methods.
The ctypes.h header piggyback on export.h to be included in all public
headers.

lasso/Makefile.am

@@ -19,7 +19,7 @@ lasso.rc.lo: $(top_srcdir)/win32/lasso.rc
 lib_LTLIBRARIES = liblasso.la
 
 liblassoinclude_HEADERS = export.h lasso.h lasso_config.h errors.h \
-			  registry.h
+			  registry.h ctypes.h
 nodist_liblassoinclude_HEADERS = debug.h utils.h registry-private.h logging.h backward_comp.h
 BUILT_SOURCES = types.c errors.c symbols.sym
 

lasso/ctypes.h

@@ -0,0 +1,39 @@
+/* $Id$
+ *
+ * Lasso - A free implementation of the Liberty Alliance specifications.
+ *
+ * Copyright (C) 2004-2007 Entr'ouvert
+ * http://lasso.entrouvert.org
+ *
+ * Authors: See AUTHORS file in top-level directory.
+ *
+ * This program 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * 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
+ */
+
+#ifndef __LASSO_CTYPES_H__
+#define __LASSO_CTYPES_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Mark error returning functions */
+typedef int lasso_error_t;
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __LASSO_CTYPES_H__ */

lasso/export.h

@@ -29,6 +29,8 @@
 extern "C" {
 #endif /* __cplusplus */
 
+#include "./ctypes.h"
+
 /* Now, the export orgy begins. The following we must do for the
  * Windows platform with MSVC compiler. */