You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
253 lines
9.4 KiB
253 lines
9.4 KiB
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013-2019 Damien P. George
|
|
* Copyright (c) 2014-2015 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 <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#include "py/bc.h"
|
|
#include "py/objmodule.h"
|
|
#include "py/runtime.h"
|
|
#include "py/builtin.h"
|
|
|
|
#ifndef NO_QSTR
|
|
// Only include module definitions when not doing qstr extraction, because the
|
|
// qstr extraction stage also generates this module definition header file.
|
|
#include "genhdr/moduledefs.h"
|
|
#endif
|
|
|
|
#if MICROPY_MODULE_BUILTIN_INIT
|
|
STATIC void mp_module_call_init(mp_obj_t module_name, mp_obj_t module_obj);
|
|
#endif
|
|
|
|
STATIC void module_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
(void)kind;
|
|
mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
|
|
|
|
const char *module_name = "";
|
|
mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
module_name = mp_obj_str_get_str(elem->value);
|
|
}
|
|
|
|
#if MICROPY_PY___FILE__
|
|
// If we store __file__ to imported modules then try to lookup this
|
|
// symbol to give more information about the module.
|
|
elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___file__), MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
mp_printf(print, "<module '%s' from '%s'>", module_name, mp_obj_str_get_str(elem->value));
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
mp_printf(print, "<module '%s'>", module_name);
|
|
}
|
|
|
|
STATIC void module_attr_try_delegation(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
|
|
#if MICROPY_MODULE_ATTR_DELEGATION
|
|
// Delegate lookup to a module's custom attr method (found in last lot of globals dict).
|
|
mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
|
|
mp_map_t *map = &self->globals->map;
|
|
if (map->table[map->alloc - 1].key == MP_OBJ_NEW_QSTR(MP_QSTRnull)) {
|
|
((mp_attr_fun_t)MP_OBJ_TO_PTR(map->table[map->alloc - 1].value))(self_in, attr, dest);
|
|
}
|
|
#else
|
|
(void)self_in;
|
|
(void)attr;
|
|
(void)dest;
|
|
#endif
|
|
}
|
|
|
|
STATIC void module_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
|
|
mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
|
|
if (dest[0] == MP_OBJ_NULL) {
|
|
// load attribute
|
|
mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
dest[0] = elem->value;
|
|
#if MICROPY_MODULE_GETATTR
|
|
} else if (attr != MP_QSTR___getattr__) {
|
|
elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___getattr__), MP_MAP_LOOKUP);
|
|
if (elem != NULL) {
|
|
dest[0] = mp_call_function_1(elem->value, MP_OBJ_NEW_QSTR(attr));
|
|
} else {
|
|
module_attr_try_delegation(self_in, attr, dest);
|
|
}
|
|
#endif
|
|
} else {
|
|
module_attr_try_delegation(self_in, attr, dest);
|
|
}
|
|
} else {
|
|
// delete/store attribute
|
|
mp_obj_dict_t *dict = self->globals;
|
|
if (dict->map.is_fixed) {
|
|
#if MICROPY_CAN_OVERRIDE_BUILTINS
|
|
if (dict == &mp_module_builtins_globals) {
|
|
if (MP_STATE_VM(mp_module_builtins_override_dict) == NULL) {
|
|
MP_STATE_VM(mp_module_builtins_override_dict) = MP_OBJ_TO_PTR(mp_obj_new_dict(1));
|
|
}
|
|
dict = MP_STATE_VM(mp_module_builtins_override_dict);
|
|
} else
|
|
#endif
|
|
{
|
|
// can't delete or store to fixed map
|
|
module_attr_try_delegation(self_in, attr, dest);
|
|
return;
|
|
}
|
|
}
|
|
if (dest[1] == MP_OBJ_NULL) {
|
|
// delete attribute
|
|
mp_obj_dict_delete(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr));
|
|
} else {
|
|
// store attribute
|
|
mp_obj_dict_store(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr), dest[1]);
|
|
}
|
|
dest[0] = MP_OBJ_NULL; // indicate success
|
|
}
|
|
}
|
|
|
|
MP_DEFINE_CONST_OBJ_TYPE(
|
|
mp_type_module,
|
|
MP_QSTR_module,
|
|
MP_TYPE_FLAG_NONE,
|
|
print, module_print,
|
|
attr, module_attr
|
|
);
|
|
|
|
mp_obj_t mp_obj_new_module(qstr module_name) {
|
|
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
|
|
mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
|
|
// We could error out if module already exists, but let C extensions
|
|
// add new members to existing modules.
|
|
if (el->value != MP_OBJ_NULL) {
|
|
return el->value;
|
|
}
|
|
|
|
// create new module object
|
|
mp_module_context_t *o = m_new_obj(mp_module_context_t);
|
|
o->module.base.type = &mp_type_module;
|
|
o->module.globals = MP_OBJ_TO_PTR(mp_obj_new_dict(MICROPY_MODULE_DICT_SIZE));
|
|
|
|
// store __name__ entry in the module
|
|
mp_obj_dict_store(MP_OBJ_FROM_PTR(o->module.globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));
|
|
|
|
// store the new module into the slot in the global dict holding all modules
|
|
el->value = MP_OBJ_FROM_PTR(o);
|
|
|
|
// return the new module
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
|
|
/******************************************************************************/
|
|
// Global module table and related functions
|
|
|
|
STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
|
|
// builtin modules declared with MP_REGISTER_MODULE()
|
|
MICROPY_REGISTERED_MODULES
|
|
};
|
|
|
|
MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);
|
|
|
|
// Tries to find a loaded module, otherwise attempts to load a builtin, otherwise MP_OBJ_NULL.
|
|
mp_obj_t mp_module_get_loaded_or_builtin(qstr module_name) {
|
|
// First try loaded modules.
|
|
mp_map_elem_t *elem = mp_map_lookup(&MP_STATE_VM(mp_loaded_modules_dict).map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
|
|
|
|
if (!elem) {
|
|
#if MICROPY_MODULE_WEAK_LINKS
|
|
return mp_module_get_builtin(module_name);
|
|
#else
|
|
// Otherwise try builtin.
|
|
elem = mp_map_lookup((mp_map_t *)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
|
|
if (!elem) {
|
|
return MP_OBJ_NULL;
|
|
}
|
|
|
|
#if MICROPY_MODULE_BUILTIN_INIT
|
|
// If found, it's a newly loaded built-in, so init it.
|
|
mp_module_call_init(MP_OBJ_NEW_QSTR(module_name), elem->value);
|
|
#endif
|
|
#endif
|
|
}
|
|
|
|
return elem->value;
|
|
}
|
|
|
|
#if MICROPY_MODULE_WEAK_LINKS
|
|
// Tries to find a loaded module, otherwise attempts to load a builtin, otherwise MP_OBJ_NULL.
|
|
mp_obj_t mp_module_get_builtin(qstr module_name) {
|
|
// Try builtin.
|
|
mp_map_elem_t *elem = mp_map_lookup((mp_map_t *)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
|
|
if (!elem) {
|
|
return MP_OBJ_NULL;
|
|
}
|
|
|
|
#if MICROPY_MODULE_BUILTIN_INIT
|
|
// If found, it's a newly loaded built-in, so init it.
|
|
mp_module_call_init(MP_OBJ_NEW_QSTR(module_name), elem->value);
|
|
#endif
|
|
|
|
return elem->value;
|
|
}
|
|
#endif
|
|
|
|
#if MICROPY_MODULE_BUILTIN_INIT
|
|
STATIC void mp_module_register(mp_obj_t module_name, mp_obj_t module) {
|
|
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
|
|
mp_map_lookup(mp_loaded_modules_map, module_name, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
|
|
}
|
|
|
|
STATIC void mp_module_call_init(mp_obj_t module_name, mp_obj_t module_obj) {
|
|
// Look for __init__ and call it if it exists
|
|
mp_obj_t dest[2];
|
|
mp_load_method_maybe(module_obj, MP_QSTR___init__, dest);
|
|
if (dest[0] != MP_OBJ_NULL) {
|
|
mp_call_method_n_kw(0, 0, dest);
|
|
// Register module so __init__ is not called again.
|
|
// If a module can be referenced by more than one name (eg due to weak links)
|
|
// then __init__ will still be called for each distinct import, and it's then
|
|
// up to the particular module to make sure it's __init__ code only runs once.
|
|
mp_module_register(module_name, module_obj);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void mp_module_generic_attr(qstr attr, mp_obj_t *dest, const uint16_t *keys, mp_obj_t *values) {
|
|
for (size_t i = 0; keys[i] != MP_QSTRnull; ++i) {
|
|
if (attr == keys[i]) {
|
|
if (dest[0] == MP_OBJ_NULL) {
|
|
// load attribute (MP_OBJ_NULL returned for deleted items)
|
|
dest[0] = values[i];
|
|
} else {
|
|
// delete or store (delete stores MP_OBJ_NULL)
|
|
values[i] = dest[1];
|
|
dest[0] = MP_OBJ_NULL; // indicate success
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|