libguile/variable.h

   1 /* classes: h_files */
   2
   3 #ifndef VARIABLEH
   4 #define VARIABLEH
   5 /*      Copyright (C) 1995,1996 Free Software Foundation, Inc.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2, or (at your option)
  10  * any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this software; see the file COPYING.  If not, write to
  19  * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  20  *
  21  * As a special exception, the Free Software Foundation gives permission
  22  * for additional uses of the text contained in its release of GUILE.
  23  *
  24  * The exception is that, if you link the GUILE library with other files
  25  * to produce an executable, this does not by itself cause the
  26  * resulting executable to be covered by the GNU General Public License.
  27  * Your use of that executable is in no way restricted on account of
  28  * linking the GUILE library code into it.
  29  *
  30  * This exception does not however invalidate any other reasons why
  31  * the executable file might be covered by the GNU General Public License.
  32  *
  33  * This exception applies only to the code released by the
  34  * Free Software Foundation under the name GUILE.  If you copy
  35  * code from other Free Software Foundation releases into a copy of
  36  * GUILE, as the General Public License permits, the exception does
  37  * not apply to the code that you add in this way.  To avoid misleading
  38  * anyone as to the status of such modified files, you must delete
  39  * this exception notice from them.
  40  *
  41  * If you write modifications of your own for GUILE, it is your choice
  42  * whether to permit this exception to apply to your modifications.
  43  * If you do not wish that, delete this exception notice.
  44  */
  45 \f
  46 #include "libguile/__scm.h"
  47
  48 \f
  49
  50
  51 /* Variables
  52  */
  53 extern int scm_tc16_variable;
  54
  55 #define SCM_VARVCELL(V)         SCM_CDR(V)
  56 #define SCM_VARIABLEP(X)        (scm_tc16_variable == SCM_CAR(X))
  57 #define SCM_UDSCM_VARIABLEP(X)  (SCM_VARIABLEP(X) && SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (X))))
  58 #define SCM_DEFSCM_VARIABLEP(X)         (SCM_VARIABLEP(X) && !SCM_UNBNDP (SCM_CDR (SCM_VARVCELL (X))))
  59
  60 \f
  61 #ifdef __STDC__
  62 extern SCM scm_make_variable (SCM init, SCM name_hint);
  63 extern SCM scm_make_udvariable (SCM name_hint);
  64 extern SCM scm_variable_p (SCM obj);
  65 extern SCM scm_variable_ref (SCM var);
  66 extern SCM scm_variable_set_x (SCM var, SCM val);
  67 extern SCM scm_builtin_variable (SCM name);
  68 extern SCM scm_variable_bound_p (SCM var);
  69 extern void scm_init_variable (void);
  70
  71 #else /* STDC */
  72 extern SCM scm_make_variable ();
  73 extern SCM scm_make_udvariable ();
  74 extern SCM scm_variable_p ();
  75 extern SCM scm_variable_ref ();
  76 extern SCM scm_variable_set_x ();
  77 extern SCM scm_builtin_variable ();
  78 extern SCM scm_variable_bound_p ();
  79 extern void scm_init_variable ();
  80
  81 #endif /* STDC */
  82
  83
  84
  85
  86
  87 #endif  /* VARIABLEH */