mes/src/module.c

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/* -*-comment-start: "//";comment-end:""-*-
* GNU Mes --- Maxwell Equations of Software
* Copyright © 2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
*
* This file is part of GNU Mes.
*
* GNU Mes 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 3 of the License, or (at
* your option) any later version.
*
* GNU Mes 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 GNU Mes. If not, see <http://www.gnu.org/licenses/>.
*/
SCM
make_initial_module (SCM a)
{
SCM fields = cell_nil;
fields = cons (cstring_to_symbol ("globals"), fields);
fields = cons (cstring_to_symbol ("locals"), fields);
fields = cons (cstring_to_symbol ("name"), fields);
fields = cons (cstring_to_symbol ("<module>"), fields);
SCM module_type = make_struct (cstring_to_symbol ("record-type"), fields, cell_unspecified);
SCM module_type_name = cstring_to_symbol ("<module>");
a = acons (module_type_name, module_type, a);
SCM values = cell_nil;
SCM name = cons (cstring_to_symbol ("boot"), cell_nil);
SCM globals = cell_nil;
values = cons (a, values);
values = cons (globals, values);
values = cons (name, values);
SCM module = make_struct (module_type_name, values, cell_unspecified);
return module;
}
SCM
module_ref (SCM module, SCM name)
{
SCM x = module_variable (module, name);
if (x == cell_f)
return cell_undefined;
return CDR (x);
}
SCM
module_variable (SCM module, SCM name)
{
//SCM locals = struct_ref (module, 4);
SCM locals = module;
return assq (name, locals);
}