builtinimport.c

/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George
 * Copyright (c) 2014 Paul Sokolovsky
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "py/nlr.h"
#include "py/compile.h"
#include "py/objmodule.h"
#include "py/runtime.h"
#include "py/builtin.h"
#include "py/frozenmod.h"

#if 0 // print debugging info
#define DEBUG_PRINT (1)
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_PRINT (0)
#define DEBUG_printf(...) (void)0
#endif

#define PATH_SEP_CHAR '/'

#if MICROPY_MODULE_WEAK_LINKS
STATIC const mp_map_elem_t mp_builtin_module_weak_links_table[] = {
    MICROPY_PORT_BUILTIN_MODULE_WEAK_LINKS
};

STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_weak_links_map, mp_builtin_module_weak_links_table);
#endif

bool mp_obj_is_package(mp_obj_t module) {
    mp_obj_t dest[2];
    mp_load_method_maybe(module, MP_QSTR___path__, dest);
    return dest[0] != MP_OBJ_NULL;
}

STATIC mp_import_stat_t stat_dir_or_file(vstr_t *path) {
    mp_import_stat_t stat = mp_import_stat(vstr_null_terminated_str(path));
    DEBUG_printf("stat %s: %d\n", vstr_str(path), stat);
    if (stat == MP_IMPORT_STAT_DIR) {
        return stat;
    }
    vstr_add_str(path, ".py");
    stat = mp_import_stat(vstr_null_terminated_str(path));