110 lines
3.4 KiB
C
110 lines
3.4 KiB
C
#include <stdlib.h>
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#include <assert.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "objmodule.h"
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#include "runtime.h"
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#include "builtintables.h"
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STATIC mp_map_t mp_loaded_modules_map; // TODO: expose as sys.modules
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STATIC void module_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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mp_obj_module_t *self = self_in;
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print(env, "<module '%s' from '-unknown-file-'>", qstr_str(self->name));
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}
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STATIC void module_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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mp_obj_module_t *self = self_in;
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mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
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if (elem != NULL) {
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dest[0] = elem->value;
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}
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}
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STATIC bool module_store_attr(mp_obj_t self_in, qstr attr, mp_obj_t value) {
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mp_obj_module_t *self = self_in;
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if (value == MP_OBJ_NULL) {
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// delete attribute
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mp_obj_dict_delete(self->globals, MP_OBJ_NEW_QSTR(attr));
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} else {
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// store attribute
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// TODO CPython allows STORE_ATTR to a module, but is this the correct implementation?
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mp_obj_dict_store(self->globals, MP_OBJ_NEW_QSTR(attr), value);
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}
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return true;
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}
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const mp_obj_type_t mp_type_module = {
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{ &mp_type_type },
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.name = MP_QSTR_module,
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.print = module_print,
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.load_attr = module_load_attr,
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.store_attr = module_store_attr,
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};
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mp_obj_t mp_obj_new_module(qstr module_name) {
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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);
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// We could error out if module already exists, but let C extensions
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// add new members to existing modules.
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if (el->value != MP_OBJ_NULL) {
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return el->value;
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}
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// create new module object
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mp_obj_module_t *o = m_new_obj(mp_obj_module_t);
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o->base.type = &mp_type_module;
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o->name = module_name;
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o->globals = mp_obj_new_dict(1);
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// store __name__ entry in the module
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mp_obj_dict_store(o->globals, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));
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// store the new module into the slot in the global dict holding all modules
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el->value = o;
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// return the new module
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return o;
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}
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mp_obj_dict_t *mp_obj_module_get_globals(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_module));
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mp_obj_module_t *self = self_in;
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return self->globals;
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}
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/******************************************************************************/
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// Global module table and related functions
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void mp_module_init(void) {
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mp_map_init(&mp_loaded_modules_map, 3);
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}
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void mp_module_deinit(void) {
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mp_map_deinit(&mp_loaded_modules_map);
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}
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// returns MP_OBJ_NULL if not found
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mp_obj_t mp_module_get(qstr module_name) {
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// lookup module
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mp_map_elem_t *el = mp_map_lookup(&mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
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if (el == NULL) {
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// module not found, look for builtin module names
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el = mp_map_lookup((mp_map_t*)&mp_builtin_module_dict_obj.map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
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if (el == NULL) {
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return MP_OBJ_NULL;
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}
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}
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// module found, return it
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return el->value;
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}
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void mp_module_register(qstr qstr, mp_obj_t module) {
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mp_map_lookup(&mp_loaded_modules_map, MP_OBJ_NEW_QSTR(qstr), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
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}
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