+/* guile-irrlicht --- GNU Guile bindings for Irrlicht Engine
+
+ Copyright (C) 2020 Javier Sancho <jsf@jsancho.org>
+
+ This file is part of guile-irrlicht.
+
+ guile-irrlicht is free software; you can redistribute it and/or modify
+ it under the terms of the GNU Lesser General Public License as
+ published by the Free Software Foundation; either version 3 of the
+ License, or (at your option) any later version.
+
+ guile-irrlicht 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 Lesser General Public
+ License along with guile-irrlicht. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+
+#define DECLARE_WRAPPED_TYPE(TYPE, INIT, WRAP, UNWRAP) \
+ void \
+ INIT (void); \
+ \
+ SCM \
+ WRAP (TYPE foreign_obj); \
+ \
+ TYPE \
+ UNWRAP (SCM wrapped_obj);
+
+
+#define DEFINE_WRAPPED_TYPE(TYPE, PRINT_NAME, INIT, WRAP, UNWRAP) \
+ static SCM wrapped_type; \
+ \
+ void \
+ INIT (void) \
+ { \
+ SCM name, slots; \
+ scm_t_struct_finalize finalizer; \
+ \
+ name = scm_from_utf8_symbol (PRINT_NAME); \
+ slots = scm_list_1 (scm_from_utf8_symbol ("data")); \
+ finalizer = NULL; \
+ \
+ wrapped_type = \
+ scm_make_foreign_object_type (name, slots, finalizer); \
+ } \
+ \
+ SCM \
+ WRAP (TYPE foreign_obj) \
+ { \
+ return scm_make_foreign_object_1 (wrapped_type, foreign_obj); \
+ } \
+ \
+ TYPE \
+ UNWRAP (SCM wrapped_obj) \
+ { \
+ scm_assert_foreign_object_type (wrapped_type, wrapped_obj); \
+ return (TYPE)scm_foreign_object_ref (wrapped_obj, 0); \
+ }