objproperty.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/runtime.h"
#if MICROPY_PY_BUILTINS_PROPERTY
typedef struct _mp_obj_property_t {
mp_obj_base_t base;
mp_obj_t proxy[3]; // getter, setter, deleter
} mp_obj_property_t;
STATIC mp_obj_t property_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
enum { ARG_fget, ARG_fset, ARG_fdel, ARG_doc };
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_doc, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
};
mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, vals);
mp_obj_property_t *o = m_new_obj(mp_obj_property_t);
o->base.type = type;
o->proxy[0] = vals[ARG_fget].u_obj;
o->proxy[1] = vals[ARG_fset].u_obj;
o->proxy[2] = vals[ARG_fdel].u_obj;
// vals[ARG_doc] is silently discarded
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_obj_t property_getter(mp_obj_t self_in, mp_obj_t getter) {
mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
*p2 = *(mp_obj_property_t*)MP_OBJ_TO_PTR(self_in);
p2->proxy[0] = getter;
return MP_OBJ_FROM_PTR(p2);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_getter_obj, property_getter);
STATIC mp_obj_t property_setter(mp_obj_t self_in, mp_obj_t setter) {
mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
*p2 = *(mp_obj_property_t*)MP_OBJ_TO_PTR(self_in);
p2->proxy[1] = setter;
return MP_OBJ_FROM_PTR(p2);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_setter_obj, property_setter);
STATIC mp_obj_t property_deleter(mp_obj_t self_in, mp_obj_t deleter) {
mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
*p2 = *(mp_obj_property_t*)MP_OBJ_TO_PTR(self_in);
p2->proxy[2] = deleter;
return MP_OBJ_FROM_PTR(p2);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_deleter_obj, property_deleter);
STATIC const mp_rom_map_elem_t property_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_getter), MP_ROM_PTR(&property_getter_obj) },
{ MP_ROM_QSTR(MP_QSTR_setter), MP_ROM_PTR(&property_setter_obj) },
{ MP_ROM_QSTR(MP_QSTR_deleter), MP_ROM_PTR(&property_deleter_obj) },
};
STATIC MP_DEFINE_CONST_DICT(property_locals_dict, property_locals_dict_table);
const mp_obj_type_t mp_type_property = {
{ &mp_type_type },
.name = MP_QSTR_property,
.make_new = property_make_new,
.locals_dict = (mp_obj_dict_t*)&property_locals_dict,
};
const mp_obj_t *mp_obj_property_get(mp_obj_t self_in) {
mp_check_self(MP_OBJ_IS_TYPE(self_in, &mp_type_property));
mp_obj_property_t *self = MP_OBJ_TO_PTR(self_in);
return self->proxy;
}
#endif // MICROPY_PY_BUILTINS_PROPERTY