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Diff: py/objmodule.c
- Revision:
- 0:5868e8752d44
- Child:
- 2:c89e95946844
diff -r 000000000000 -r 5868e8752d44 py/objmodule.c --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/py/objmodule.c Sat Apr 16 17:11:56 2016 +0000 @@ -0,0 +1,246 @@ +/* + * This file is part of the Micro Python 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/mpstate.h" +#include "py/nlr.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); + +#if MICROPY_PY___FILE__ + // If we store __file__ to imported modules then try to lookup this + // symbol to give more information about the module. + mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___file__), MP_MAP_LOOKUP); + if (elem != NULL) { + mp_printf(print, "<module '%q' from '%s'>", self->name, mp_obj_str_get_str(elem->value)); + return; + } +#endif + + mp_printf(print, "<module '%q'>", self->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->name = module_name; + 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__io), MP_ROM_PTR(&mp_module_io) }, +#endif +#if MICROPY_PY_COLLECTIONS + { MP_ROM_QSTR(MP_QSTR__collections), 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 + + // extmod modules + +#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_UHASHLIB + { MP_ROM_QSTR(MP_QSTR_uhashlib), MP_ROM_PTR(&mp_module_uhashlib) }, +#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_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 + + // extra builtin modules as defined by a port + MICROPY_PORT_BUILTIN_MODULES +}; + +STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table); + +void mp_module_init(void) { + mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3); +} + +void mp_module_deinit(void) { + //mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map)); +} + +// 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; + } + + if (MICROPY_MODULE_BUILTIN_INIT) { + // look for __init__ and call it if it exists + mp_obj_t dest[2]; + mp_load_method_maybe(el->value, 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 + mp_module_register(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; +}