Branch data Line data Source code
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 : :
34 : : typedef 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 : :
39 : 68 : 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) {
40 : 68 : enum { ARG_fget, ARG_fset, ARG_fdel, ARG_doc };
41 : 68 : 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 : 68 : mp_arg_val_t vals[MP_ARRAY_SIZE(allowed_args)];
48 : 68 : mp_arg_parse_all_kw_array(n_args, n_kw, args, MP_ARRAY_SIZE(allowed_args), allowed_args, vals);
49 : :
50 : 68 : mp_obj_property_t *o = mp_obj_malloc(mp_obj_property_t, type);
51 : 68 : o->proxy[0] = vals[ARG_fget].u_obj;
52 : 68 : o->proxy[1] = vals[ARG_fset].u_obj;
53 : 68 : o->proxy[2] = vals[ARG_fdel].u_obj;
54 : : // vals[ARG_doc] is silently discarded
55 : 68 : return MP_OBJ_FROM_PTR(o);
56 : : }
57 : :
58 : 4 : static mp_obj_t property_getter(mp_obj_t self_in, mp_obj_t getter) {
59 : 4 : mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
60 : 4 : *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
61 : 4 : p2->proxy[0] = getter;
62 : 4 : return MP_OBJ_FROM_PTR(p2);
63 : : }
64 : :
65 : : static MP_DEFINE_CONST_FUN_OBJ_2(property_getter_obj, property_getter);
66 : :
67 : 22 : static mp_obj_t property_setter(mp_obj_t self_in, mp_obj_t setter) {
68 : 22 : mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
69 : 22 : *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
70 : 22 : p2->proxy[1] = setter;
71 : 22 : return MP_OBJ_FROM_PTR(p2);
72 : : }
73 : :
74 : : static MP_DEFINE_CONST_FUN_OBJ_2(property_setter_obj, property_setter);
75 : :
76 : 8 : static mp_obj_t property_deleter(mp_obj_t self_in, mp_obj_t deleter) {
77 : 8 : mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
78 : 8 : *p2 = *(mp_obj_property_t *)MP_OBJ_TO_PTR(self_in);
79 : 8 : p2->proxy[2] = deleter;
80 : 8 : return MP_OBJ_FROM_PTR(p2);
81 : : }
82 : :
83 : : static MP_DEFINE_CONST_FUN_OBJ_2(property_deleter_obj, property_deleter);
84 : :
85 : : static const mp_rom_map_elem_t property_locals_dict_table[] = {
86 : : { MP_ROM_QSTR(MP_QSTR_getter), MP_ROM_PTR(&property_getter_obj) },
87 : : { MP_ROM_QSTR(MP_QSTR_setter), MP_ROM_PTR(&property_setter_obj) },
88 : : { MP_ROM_QSTR(MP_QSTR_deleter), MP_ROM_PTR(&property_deleter_obj) },
89 : : };
90 : :
91 : : static MP_DEFINE_CONST_DICT(property_locals_dict, property_locals_dict_table);
92 : :
93 : : MP_DEFINE_CONST_OBJ_TYPE(
94 : : mp_type_property,
95 : : MP_QSTR_property,
96 : : MP_TYPE_FLAG_NONE,
97 : : make_new, property_make_new,
98 : : locals_dict, &property_locals_dict
99 : : );
100 : :
101 : 122 : const mp_obj_t *mp_obj_property_get(mp_obj_t self_in) {
102 : 122 : mp_check_self(mp_obj_is_type(self_in, &mp_type_property));
103 : 122 : mp_obj_property_t *self = MP_OBJ_TO_PTR(self_in);
104 : 122 : return self->proxy;
105 : : }
106 : :
107 : : #endif // MICROPY_PY_BUILTINS_PROPERTY
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