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
32typedef struct _mp_obj_map_t {
33 mp_obj_base_t base;
34 size_t n_iters;
35 mp_obj_t fun;
36 mp_obj_t iters[];
37} mp_obj_map_t;
38
39STATIC mp_obj_t map_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
40 mp_arg_check_num(n_args, n_kw, 2, MP_OBJ_FUN_ARGS_MAX, false);
41 mp_obj_map_t *o = m_new_obj_var(mp_obj_map_t, mp_obj_t, n_args - 1);
42 o->base.type = type;
43 o->n_iters = n_args - 1;
44 o->fun = args[0];
45 for (size_t i = 0; i < n_args - 1; i++) {
46 o->iters[i] = mp_getiter(args[i + 1], NULL);
47 }
48 return MP_OBJ_FROM_PTR(o);
49}
50
51STATIC mp_obj_t map_iternext(mp_obj_t self_in) {
52 mp_check_self(mp_obj_is_type(self_in, &mp_type_map));
53 mp_obj_map_t *self = MP_OBJ_TO_PTR(self_in);
54 mp_obj_t *nextses = m_new(mp_obj_t, self->n_iters);
55
56 for (size_t i = 0; i < self->n_iters; i++) {
57 mp_obj_t next = mp_iternext(self->iters[i]);
58 if (next == MP_OBJ_STOP_ITERATION) {
59 m_del(mp_obj_t, nextses, self->n_iters);
60 return MP_OBJ_STOP_ITERATION;
61 }
62 nextses[i] = next;
63 }
64 return mp_call_function_n_kw(self->fun, self->n_iters, 0, nextses);
65}
66
67const mp_obj_type_t mp_type_map = {
68 { &mp_type_type },
69 .name = MP_QSTR_map,
70 .make_new = map_make_new,
71 .getiter = mp_identity_getiter,
72 .iternext = map_iternext,
73};
74