* modules.c, modules.h: New files: C interface to modules. (This

[bpt/guile.git] / libguile / modules.c

/*	Copyright (C) 1998 Free Software Foundation, Inc.
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 * 
 * This program 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 General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA
 *
 * As a special exception, the Free Software Foundation gives permission
 * for additional uses of the text contained in its release of GUILE.
 *
 * The exception is that, if you link the GUILE library with other files
 * to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the GUILE library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the
 * Free Software Foundation under the name GUILE.  If you copy
 * code from other Free Software Foundation releases into a copy of
 * GUILE, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for GUILE, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.  */
\f

#include "_scm.h"

#include "eval.h"

#include "modules.h"

static SCM the_module;

SCM
scm_selected_module ()
{
  return SCM_CDR (the_module);
}

static SCM set_current_module;

SCM
scm_select_module (SCM module)
{
  SCM old = scm_selected_module ();
  scm_apply (SCM_CDR (set_current_module), SCM_LIST1 (module), SCM_EOL);
  return old;
}

SCM_SYMBOL (scm_sym_app, "app");
SCM_SYMBOL (scm_sym_modules, "modules");
static SCM module_prefix;

static SCM
scm_module_full_name (SCM name)
{
  if (SCM_CAR (name) == scm_sym_app)
    return name;
  else
    return scm_append (SCM_LIST2 (module_prefix, name));
}

static SCM make_modules_in;

SCM
scm_make_module (SCM name)
{
  return scm_apply (SCM_CDR (make_modules_in),
		    SCM_LIST2 (scm_selected_module (),
			       scm_module_full_name (name)),
		    SCM_EOL);
}

static SCM module_eval_closure;

SCM
scm_module_lookup_closure (SCM module)
{
  return scm_apply (SCM_CDR (module_eval_closure),
		    SCM_LIST1 (module),
		    SCM_EOL);
}

void
scm_init_modules ()
{
#include "modules.x"
}

void
scm_post_boot_init_modules ()
{
  the_module = scm_intern0 ("the-module");
  set_current_module = scm_intern0 ("set-current-module");
  module_prefix = scm_permanent_object (SCM_LIST2 (scm_sym_app,
						   scm_sym_modules));
  make_modules_in = scm_intern0 ("make-modules-in");
  module_eval_closure = scm_intern0 ("module-eval-closure");
}