src/util.h

   1 /* guile-irrlicht --- GNU Guile bindings for Irrlicht Engine
   2
   3    Copyright (C) 2020 Javier Sancho <jsf@jsancho.org>
   4
   5    This file is part of guile-irrlicht.
   6
   7    guile-irrlicht is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU Lesser General Public License as
   9    published by the Free Software Foundation; either version 3 of the
  10    License, or (at your option) any later version.
  11
  12    guile-irrlicht is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with guile-irrlicht. If not, see
  19    <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include <libguile.h>
  23 #include <wchar.h>
  24
  25 #define DECLARE_WRAPPED_TYPE(TYPE, INIT, WRAP, UNWRAP)                  \
  26   void                                                                  \
  27   INIT (void);                                                          \
  28                                                                         \
  29   SCM                                                                   \
  30   WRAP (TYPE foreign_obj);                                              \
  31                                                                         \
  32   TYPE                                                                  \
  33   UNWRAP (SCM wrapped_obj);
  34
  35
  36 #define DEFINE_WRAPPED_TYPE(TYPE, PRINT_NAME, INIT, WRAP, UNWRAP)       \
  37   static SCM wrapped_type;                                              \
  38                                                                         \
  39   void                                                                  \
  40   INIT (void)                                                           \
  41   {                                                                     \
  42     SCM name, slots;                                                    \
  43     scm_t_struct_finalize finalizer;                                    \
  44                                                                         \
  45     name = scm_from_utf8_symbol (PRINT_NAME);                           \
  46     slots = scm_list_1 (scm_from_utf8_symbol ("data"));                 \
  47     finalizer = NULL;                                                   \
  48                                                                         \
  49     wrapped_type =                                                      \
  50       scm_make_foreign_object_type (name, slots, finalizer);            \
  51   }                                                                     \
  52                                                                         \
  53   SCM                                                                   \
  54   WRAP (TYPE foreign_obj)                                               \
  55   {                                                                     \
  56     return scm_make_foreign_object_1 (wrapped_type, foreign_obj);       \
  57   }                                                                     \
  58                                                                         \
  59   TYPE                                                                  \
  60   UNWRAP (SCM wrapped_obj)                                              \
  61   {                                                                     \
  62     scm_assert_foreign_object_type (wrapped_type, wrapped_obj);         \
  63     return (TYPE)scm_foreign_object_ref (wrapped_obj, 0);               \
  64   }
  65
  66 wchar_t*
  67 scm_to_wide_char_string (SCM text);