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micropython/py/objmodule.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* 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 <assert.h>
#include "py/objmodule.h"
#include "py/runtime.h"
#include "py/builtin.h"
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(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;
}
} 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
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
// TODO CPython allows STORE_ATTR to a module, but is this the correct implementation?
mp_obj_dict_store(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr), dest[1]);
}
dest[0] = MP_OBJ_NULL; // indicate success
}
}
const mp_obj_type_t mp_type_module = {
{ &mp_type_type },
.name = MP_QSTR_module,
.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_obj_module_t *o = m_new_obj(mp_obj_module_t);
o->base.type = &mp_type_module;
o->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->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);
}
mp_obj_dict_t *mp_obj_module_get_globals(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_module));
mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
return self->globals;
}
/******************************************************************************/
// Global module table and related functions
STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
{ MP_ROM_QSTR(MP_QSTR___main__), MP_ROM_PTR(&mp_module___main__) },
{ MP_ROM_QSTR(MP_QSTR_builtins), MP_ROM_PTR(&mp_module_builtins) },
{ MP_ROM_QSTR(MP_QSTR_micropython), MP_ROM_PTR(&mp_module_micropython) },
#if MICROPY_PY_ARRAY
{ MP_ROM_QSTR(MP_QSTR_array), MP_ROM_PTR(&mp_module_array) },
#endif
#if MICROPY_PY_IO
{ MP_ROM_QSTR(MP_QSTR_uio), MP_ROM_PTR(&mp_module_io) },
#endif
#if MICROPY_PY_COLLECTIONS
{ MP_ROM_QSTR(MP_QSTR_ucollections), MP_ROM_PTR(&mp_module_collections) },
#endif
#if MICROPY_PY_STRUCT
{ MP_ROM_QSTR(MP_QSTR_ustruct), MP_ROM_PTR(&mp_module_ustruct) },
#endif
#if MICROPY_PY_BUILTINS_FLOAT
#if MICROPY_PY_MATH
{ MP_ROM_QSTR(MP_QSTR_math), MP_ROM_PTR(&mp_module_math) },
#endif
#if MICROPY_PY_BUILTINS_COMPLEX && MICROPY_PY_CMATH
{ MP_ROM_QSTR(MP_QSTR_cmath), MP_ROM_PTR(&mp_module_cmath) },
#endif
#endif
#if MICROPY_PY_SYS
{ MP_ROM_QSTR(MP_QSTR_sys), MP_ROM_PTR(&mp_module_sys) },
#endif
#if MICROPY_PY_GC && MICROPY_ENABLE_GC
{ MP_ROM_QSTR(MP_QSTR_gc), MP_ROM_PTR(&mp_module_gc) },
#endif
#if MICROPY_PY_THREAD
{ MP_ROM_QSTR(MP_QSTR__thread), MP_ROM_PTR(&mp_module_thread) },
#endif
// extmod modules
#if MICROPY_PY_UERRNO
{ MP_ROM_QSTR(MP_QSTR_uerrno), MP_ROM_PTR(&mp_module_uerrno) },
#endif
#if MICROPY_PY_UCTYPES
{ MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
#endif
#if MICROPY_PY_UZLIB
{ MP_ROM_QSTR(MP_QSTR_uzlib), MP_ROM_PTR(&mp_module_uzlib) },
#endif
#if MICROPY_PY_UJSON
{ MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
#endif
#if MICROPY_PY_URE
{ MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
#endif
#if MICROPY_PY_UHEAPQ
{ MP_ROM_QSTR(MP_QSTR_uheapq), MP_ROM_PTR(&mp_module_uheapq) },
#endif
#if MICROPY_PY_UTIMEQ
{ MP_ROM_QSTR(MP_QSTR_utimeq), MP_ROM_PTR(&mp_module_utimeq) },
#endif
#if MICROPY_PY_UHASHLIB
{ MP_ROM_QSTR(MP_QSTR_uhashlib), MP_ROM_PTR(&mp_module_uhashlib) },
#endif
#if MICROPY_PY_UCRYPTOLIB
{ MP_ROM_QSTR(MP_QSTR_ucryptolib), MP_ROM_PTR(&mp_module_ucryptolib) },
#endif
#if MICROPY_PY_UBINASCII
{ MP_ROM_QSTR(MP_QSTR_ubinascii), MP_ROM_PTR(&mp_module_ubinascii) },
#endif
#if MICROPY_PY_URANDOM
{ MP_ROM_QSTR(MP_QSTR_urandom), MP_ROM_PTR(&mp_module_urandom) },
#endif
#if MICROPY_PY_USELECT
{ MP_ROM_QSTR(MP_QSTR_uselect), MP_ROM_PTR(&mp_module_uselect) },
#endif
#if MICROPY_PY_USSL
{ MP_ROM_QSTR(MP_QSTR_ussl), MP_ROM_PTR(&mp_module_ussl) },
#endif
#if MICROPY_PY_LWIP
{ MP_ROM_QSTR(MP_QSTR_lwip), MP_ROM_PTR(&mp_module_lwip) },
#endif
#if MICROPY_PY_WEBSOCKET
{ MP_ROM_QSTR(MP_QSTR_websocket), MP_ROM_PTR(&mp_module_websocket) },
#endif
#if MICROPY_PY_WEBREPL
{ MP_ROM_QSTR(MP_QSTR__webrepl), MP_ROM_PTR(&mp_module_webrepl) },
#endif
#if MICROPY_PY_FRAMEBUF
{ MP_ROM_QSTR(MP_QSTR_framebuf), MP_ROM_PTR(&mp_module_framebuf) },
#endif
#if MICROPY_PY_BTREE
{ MP_ROM_QSTR(MP_QSTR_btree), MP_ROM_PTR(&mp_module_btree) },
#endif
// extra builtin modules as defined by a port
MICROPY_PORT_BUILTIN_MODULES
};
MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);
#if MICROPY_MODULE_WEAK_LINKS
STATIC const mp_rom_map_elem_t mp_builtin_module_weak_links_table[] = {
MICROPY_PORT_BUILTIN_MODULE_WEAK_LINKS
};
MP_DEFINE_CONST_MAP(mp_builtin_module_weak_links_map, mp_builtin_module_weak_links_table);
#endif
// returns MP_OBJ_NULL if not found
mp_obj_t mp_module_get(qstr module_name) {
mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
// lookup module
mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
if (el == NULL) {
// module not found, look for builtin module names
el = mp_map_lookup((mp_map_t*)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
if (el == NULL) {
return MP_OBJ_NULL;
}
mp_module_call_init(module_name, el->value);
}
// module found, return it
return el->value;
}
void mp_module_register(qstr qst, 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, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
}
#if MICROPY_MODULE_BUILTIN_INIT
void mp_module_call_init(qstr 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
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