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/* classes: h_files */

#ifndef SCM_VARIABLE_H
#define SCM_VARIABLE_H

/* Copyright (C) 1995-1996,2000-2001,2006,2008,2011,2018
 *   Free Software Foundation, Inc.
 *
 * This library 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.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301 USA
 */



#include "libguile/__scm.h"
#include <libguile/error.h>
#include <libguile/gc.h>
#include <libguile/snarf.h>



/* Variables 
 */
#define SCM_VARIABLEP(X)      (SCM_HAS_TYP7 (X, scm_tc7_variable))
#define SCM_VARIABLE_REF(V)   SCM_CELL_OBJECT_1 (V)
#define SCM_VARIABLE_SET(V, X) SCM_SET_CELL_OBJECT_1 (V, X)
#define SCM_VARIABLE_LOC(V)   (SCM_CELL_OBJECT_LOC ((V), 1))

#define SCM_VALIDATE_VARIABLE(pos, var) \
  SCM_MAKE_VALIDATE_MSG (pos, var, VARIABLEP, "variable")




#define SCM_VARIABLE(c_name, scheme_name) \
SCM_SNARF_HERE(static SCM c_name) \
SCM_SNARF_INIT(c_name = scm_c_define (scheme_name, SCM_BOOL_F);)

#define SCM_GLOBAL_VARIABLE(c_name, scheme_name) \
SCM_SNARF_HERE(SCM c_name) \
SCM_SNARF_INIT(c_name = scm_c_define (scheme_name, SCM_BOOL_F);)

#define SCM_VARIABLE_INIT(c_name, scheme_name, init_val) \
SCM_SNARF_HERE(static SCM c_name) \
SCM_SNARF_INIT(c_name = scm_c_define (scheme_name, init_val);)

#define SCM_GLOBAL_VARIABLE_INIT(c_name, scheme_name, init_val) \
SCM_SNARF_HERE(SCM c_name) \
SCM_SNARF_INIT(c_name = scm_c_define (scheme_name, init_val);)




SCM_API SCM scm_make_variable (SCM init);
SCM_API SCM scm_make_undefined_variable (void);
SCM_API SCM scm_variable_p (SCM obj);
SCM_API SCM scm_variable_ref (SCM var);
SCM_API SCM scm_variable_set_x (SCM var, SCM val);
SCM_API SCM scm_variable_unset_x (SCM var);
SCM_API SCM scm_variable_bound_p (SCM var);

SCM_INTERNAL void scm_i_variable_print (SCM var, SCM port, scm_print_state *pstate);

SCM_INTERNAL void scm_init_variable (void);

#endif  /* SCM_VARIABLE_H */

/*
  Local Variables:
  c-file-style: "gnu"
  End:
*/