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/* 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. */
/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
#include "_scm.h"
#include "eval.h"
#include "procprop.h"
#include "modules.h"
static SCM the_root_module;
static SCM root_module_lookup_closure;
SCM
scm_the_root_module ()
{
return SCM_CDR (the_root_module);
}
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;
static SCM beautify_user_module_x;
SCM
scm_make_module (SCM name)
{
return scm_apply (SCM_CDR (make_modules_in),
SCM_LIST2 (scm_the_root_module (),
scm_module_full_name (name)),
SCM_EOL);
}
SCM
scm_ensure_user_module (SCM module)
{
scm_apply (SCM_CDR (beautify_user_module_x), SCM_LIST1 (module), SCM_EOL);
return SCM_UNSPECIFIED;
}
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);
}
static SCM resolve_module;
SCM
scm_resolve_module (SCM name)
{
return scm_apply (SCM_CDR (resolve_module), SCM_LIST1 (name), SCM_EOL);
}
static SCM try_module_autoload;
SCM
scm_load_scheme_module (SCM name)
{
return scm_apply (SCM_CDR (try_module_autoload), SCM_LIST1 (name), SCM_EOL);
}
/* Environments
*/
SCM
scm_top_level_env (SCM thunk)
{
if (SCM_IMP (thunk))
return SCM_EOL;
else
return scm_cons (thunk, SCM_EOL);
}
SCM
scm_env_top_level (SCM env)
{
while (SCM_NIMP (env))
{
if (!SCM_CONSP (SCM_CAR (env))
&& SCM_NFALSEP (scm_procedure_p (SCM_CAR (env))))
return SCM_CAR(env);
env = SCM_CDR (env);
}
return SCM_BOOL_F;
}
SCM_SYMBOL (scm_sym_system_module, "system-module");
SCM
scm_system_module_env_p (SCM env)
{
SCM proc = scm_env_top_level (env);
if (SCM_FALSEP (proc))
proc = root_module_lookup_closure;
return ((SCM_NFALSEP (scm_procedure_property (proc,
scm_sym_system_module)))
? SCM_BOOL_T
: SCM_BOOL_F);
}
void
scm_init_modules ()
{
#include "modules.x"
}
void
scm_post_boot_init_modules ()
{
the_root_module = scm_intern0 ("the-root-module");
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");
beautify_user_module_x = scm_intern0 ("beautify-user-module!");
module_eval_closure = scm_intern0 ("module-eval-closure");
root_module_lookup_closure = scm_permanent_object
(scm_module_lookup_closure (SCM_CDR (the_root_module)));
resolve_module = scm_intern0 ("resolve-module");
try_module_autoload = scm_intern0 ("try-module-autoload");
}
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