libguile/variable.h

   1 /* classes: h_files */
   2
   3 #ifndef SCM_VARIABLE_H
   4 #define SCM_VARIABLE_H
   5
   6 /* Copyright (C) 1995,1996,2000,2001 Free Software Foundation, Inc.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2, or (at your option)
  11  * any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this software; see the file COPYING.  If not, write to
  20  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  21  * Boston, MA 02111-1307 USA
  22  *
  23  * As a special exception, the Free Software Foundation gives permission
  24  * for additional uses of the text contained in its release of GUILE.
  25  *
  26  * The exception is that, if you link the GUILE library with other files
  27  * to produce an executable, this does not by itself cause the
  28  * resulting executable to be covered by the GNU General Public License.
  29  * Your use of that executable is in no way restricted on account of
  30  * linking the GUILE library code into it.
  31  *
  32  * This exception does not however invalidate any other reasons why
  33  * the executable file might be covered by the GNU General Public License.
  34  *
  35  * This exception applies only to the code released by the
  36  * Free Software Foundation under the name GUILE.  If you copy
  37  * code from other Free Software Foundation releases into a copy of
  38  * GUILE, as the General Public License permits, the exception does
  39  * not apply to the code that you add in this way.  To avoid misleading
  40  * anyone as to the status of such modified files, you must delete
  41  * this exception notice from them.
  42  *
  43  * If you write modifications of your own for GUILE, it is your choice
  44  * whether to permit this exception to apply to your modifications.
  45  * If you do not wish that, delete this exception notice.  */
  46
  47 \f
  48
  49 #include "libguile/__scm.h"
  50 #include "libguile/smob.h"
  51
  52 \f
  53
  54 /* Variables
  55  */
  56 #define SCM_VARIABLEP(X)      (!SCM_IMP (X) && SCM_TYP7(X) == scm_tc7_variable)
  57 #define SCM_VARIABLE_REF(V)   SCM_CELL_OBJECT_1 (V)
  58 #define SCM_VARIABLE_SET(V,X) SCM_SET_CELL_OBJECT_1 (V, X)
  59 #define SCM_VARIABLE_LOC(V)   ((SCM *) SCM_CELL_WORD_LOC ((V), 1))
  60
  61 \f
  62
  63 SCM_API SCM scm_make_variable (SCM init);
  64 SCM_API SCM scm_make_undefined_variable (void);
  65 SCM_API SCM scm_variable_p (SCM obj);
  66 SCM_API SCM scm_variable_ref (SCM var);
  67 SCM_API SCM scm_variable_set_x (SCM var, SCM val);
  68 SCM_API SCM scm_variable_bound_p (SCM var);
  69
  70 SCM_API void scm_i_variable_print (SCM var, SCM port, scm_print_state *pstate);
  71
  72 SCM_API void scm_init_variable (void);
  73
  74 #endif  /* SCM_VARIABLE_H */
  75
  76 /*
  77   Local Variables:
  78   c-file-style: "gnu"
  79   End:
  80 */