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 <string.h>
28
29 #include "py/obj.h"
30 #include "py/runtime.h"
31
32 typedef struct _mp_obj_bound_meth_t {
33 mp_obj_base_t base;
34 mp_obj_t meth;
35 mp_obj_t self;
36 } mp_obj_bound_meth_t;
37
38 #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
bound_meth_print(const mp_print_t * print,mp_obj_t o_in,mp_print_kind_t kind)39 STATIC void bound_meth_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
40 (void)kind;
41 mp_obj_bound_meth_t *o = MP_OBJ_TO_PTR(o_in);
42 mp_printf(print, "<bound_method %p ", o);
43 mp_obj_print_helper(print, o->self, PRINT_REPR);
44 mp_print_str(print, ".");
45 mp_obj_print_helper(print, o->meth, PRINT_REPR);
46 mp_print_str(print, ">");
47 }
48 #endif
49
mp_call_method_self_n_kw(mp_obj_t meth,mp_obj_t self,size_t n_args,size_t n_kw,const mp_obj_t * args)50 mp_obj_t mp_call_method_self_n_kw(mp_obj_t meth, mp_obj_t self, size_t n_args, size_t n_kw, const mp_obj_t *args) {
51 // need to insert self before all other args and then call meth
52 size_t n_total = n_args + 2 * n_kw;
53 mp_obj_t *args2 = NULL;
54 #if MICROPY_ENABLE_PYSTACK
55 args2 = mp_pystack_alloc(sizeof(mp_obj_t) * (1 + n_total));
56 #else
57 mp_obj_t *free_args2 = NULL;
58 if (n_total > 4) {
59 // try to use heap to allocate temporary args array
60 args2 = m_new_maybe(mp_obj_t, 1 + n_total);
61 free_args2 = args2;
62 }
63 if (args2 == NULL) {
64 // (fallback to) use stack to allocate temporary args array
65 args2 = alloca(sizeof(mp_obj_t) * (1 + n_total));
66 }
67 #endif
68 args2[0] = self;
69 memcpy(args2 + 1, args, n_total * sizeof(mp_obj_t));
70 mp_obj_t res = mp_call_function_n_kw(meth, n_args + 1, n_kw, args2);
71 #if MICROPY_ENABLE_PYSTACK
72 mp_pystack_free(args2);
73 #else
74 if (free_args2 != NULL) {
75 m_del(mp_obj_t, free_args2, 1 + n_total);
76 }
77 #endif
78 return res;
79 }
80
bound_meth_call(mp_obj_t self_in,size_t n_args,size_t n_kw,const mp_obj_t * args)81 STATIC mp_obj_t bound_meth_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
82 mp_obj_bound_meth_t *self = MP_OBJ_TO_PTR(self_in);
83 return mp_call_method_self_n_kw(self->meth, self->self, n_args, n_kw, args);
84 }
85
86 #if MICROPY_PY_FUNCTION_ATTRS
bound_meth_attr(mp_obj_t self_in,qstr attr,mp_obj_t * dest)87 STATIC void bound_meth_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
88 if (dest[0] != MP_OBJ_NULL) {
89 // not load attribute
90 return;
91 }
92 // Delegate the load to the method object
93 mp_obj_bound_meth_t *self = MP_OBJ_TO_PTR(self_in);
94 mp_load_method_maybe(self->meth, attr, dest);
95 }
96 #endif
97
98 STATIC const mp_obj_type_t mp_type_bound_meth = {
99 { &mp_type_type },
100 .name = MP_QSTR_bound_method,
101 #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
102 .print = bound_meth_print,
103 #endif
104 .call = bound_meth_call,
105 #if MICROPY_PY_FUNCTION_ATTRS
106 .attr = bound_meth_attr,
107 #endif
108 };
109
mp_obj_new_bound_meth(mp_obj_t meth,mp_obj_t self)110 mp_obj_t mp_obj_new_bound_meth(mp_obj_t meth, mp_obj_t self) {
111 mp_obj_bound_meth_t *o = m_new_obj(mp_obj_bound_meth_t);
112 o->base.type = &mp_type_bound_meth;
113 o->meth = meth;
114 o->self = self;
115 return MP_OBJ_FROM_PTR(o);
116 }
117