1/*
2 * This file is part of the MicroPython project, http://micropython.org/
3 *
4 * The MIT License (MIT)
5 *
6 * Copyright (c) 2013, 2014 Damien P. George
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 * THE SOFTWARE.
25 */
26
27#include <stdlib.h>
28#include <assert.h>
29
30#include "py/runtime.h"
31
32#if MICROPY_PY_BUILTINS_PROPERTY
33
34typedef struct _mp_obj_property_t {
35 mp_obj_base_t base;
36 mp_obj_t proxy[3]; // getter, setter, deleter
37} mp_obj_property_t;
38
39STATIC 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) {
40 enum { ARG_fget, ARG_fset, ARG_fdel, ARG_doc };
41 static const mp_arg_t allowed_args[] = {
42 { MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
43 { MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
44 { MP_QSTR_, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
45 { MP_QSTR_doc, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE} },
46 };
47 mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
48 mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, vals);
49
50 mp_obj_property_t *o = m_new_obj(mp_obj_property_t);
51 o->base.type = type;
52 o->proxy[0] = vals[ARG_fget].u_obj;
53 o->proxy[1] = vals[ARG_fset].u_obj;
54 o->proxy[2] = vals[ARG_fdel].u_obj;
55 // vals[ARG_doc] is silently discarded
56 return MP_OBJ_FROM_PTR(o);
57}
58
59STATIC mp_obj_t property_getter(mp_obj_t self_in, mp_obj_t getter) {
60 mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
61 *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
62 p2->proxy[0] = getter;
63 return MP_OBJ_FROM_PTR(p2);
64}
65
66STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_getter_obj, property_getter);
67
68STATIC mp_obj_t property_setter(mp_obj_t self_in, mp_obj_t setter) {
69 mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
70 *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
71 p2->proxy[1] = setter;
72 return MP_OBJ_FROM_PTR(p2);
73}
74
75STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_setter_obj, property_setter);
76
77STATIC mp_obj_t property_deleter(mp_obj_t self_in, mp_obj_t deleter) {
78 mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
79 *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
80 p2->proxy[2] = deleter;
81 return MP_OBJ_FROM_PTR(p2);
82}
83
84STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_deleter_obj, property_deleter);
85
86STATIC const mp_rom_map_elem_t property_locals_dict_table[] = {
87 { MP_ROM_QSTR(MP_QSTR_getter), MP_ROM_PTR(&property_getter_obj) },
88 { MP_ROM_QSTR(MP_QSTR_setter), MP_ROM_PTR(&property_setter_obj) },
89 { MP_ROM_QSTR(MP_QSTR_deleter), MP_ROM_PTR(&property_deleter_obj) },
90};
91
92STATIC MP_DEFINE_CONST_DICT(property_locals_dict, property_locals_dict_table);
93
94const mp_obj_type_t mp_type_property = {
95 { &mp_type_type },
96 .name = MP_QSTR_property,
97 .make_new = property_make_new,
98 .locals_dict = (mp_obj_dict_t *)&property_locals_dict,
99};
100
101const mp_obj_t *mp_obj_property_get(mp_obj_t self_in) {
102 mp_check_self(mp_obj_is_type(self_in, &mp_type_property));
103 mp_obj_property_t *self = MP_OBJ_TO_PTR(self_in);
104 return self->proxy;
105}
106
107#endif // MICROPY_PY_BUILTINS_PROPERTY
108