121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "mes/lib.h"
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#include "mes/mes.h"
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struct scm *
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make_initial_module (struct scm *a) /*:((internal)) */
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{
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struct scm *module = make_hash_table_ (100);
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while (a->type == TPAIR)
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{
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hashq_set_x (module, a->car->car, a->car->cdr);
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a = a->cdr;
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}
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return module;
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}
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struct scm *
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initial_module ()
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{
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return M0;
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}
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struct scm *
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current_module () /*:((internal)) */
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{
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struct scm *module = hashq_ref_ (M0, cstring_to_symbol ("*current-module*"), cell_f);
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if (module != cell_f)
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return module;
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return M0;
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}
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struct scm *
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module_defines (struct scm *module) /*:((internal)) */
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{
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if (module != cell_f && module != M0)
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return struct_ref_ (module, MODULE_DEFINES);
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return M0;
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}
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struct scm *
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module_define_x (struct scm *module, struct scm *name, struct scm *value)
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{
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struct scm *table = module_defines (module);
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return hashq_set_x (table, name, value);
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}
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struct scm *
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module_handle (struct scm *module, struct scm *name) /*:((internal)) */
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{
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/* 1. Check module defines. */
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struct scm *table = module_defines (module);
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if (g_debug > 4)
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{
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eputs ("module_handle:");
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eputs (" name = ");
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write_error_ (name);
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// eputs (" defines = ");
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// write_error_ (table);
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eputs ("\n");
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}
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struct scm *handle = hashq_get_handle_ (table, name);
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if (handle != cell_f)
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return handle;
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/* 2. Custom binder. */
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/*
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struct scm *binder = struct_ref (module, MODULE_BINDER);
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if (binder != cell_f)
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{
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b = apply (binder->cdr, (cons (module, cons (name, cons (cell_f, cell_nil)))), cell_f);
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if (b != cell_f)
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return b;
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}
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*/
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/* 3. Search the use list. */
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struct scm *uses = struct_ref_ (module, MODULE_USES);
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while (uses->type == TPAIR)
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{
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handle = module_handle (uses->car, name);
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if (handle != cell_f)
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return handle;
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uses = uses->cdr;
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}
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/* 4. Hack for Mes: always look in M0. */
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handle = hashq_get_handle_ (M0, name);
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return handle;
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}
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/* NOT USED? */
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struct scm *
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module_variable (struct scm *module, struct scm *name)
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{
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struct scm *handle = module_handle (module, name);
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if (handle != cell_f)
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return handle->cdr;
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return cell_f;
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}
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