objlist.c 18.8 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
/*
 * This file is part of the Micro Python 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.
 */

27
28
29
#include <string.h>
#include <assert.h>

30
31
32
33
#include "py/nlr.h"
#include "py/objlist.h"
#include "py/runtime0.h"
#include "py/runtime.h"
34

35
36
STATIC mp_obj_t mp_obj_new_list_iterator(mp_obj_list_t *list, mp_uint_t cur);
STATIC mp_obj_list_t *list_new(mp_uint_t n);
37
STATIC mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in);
38
STATIC mp_obj_t list_pop(mp_uint_t n_args, const mp_obj_t *args);
39

40
41
42
// TODO: Move to mpconfig.h
#define LIST_MIN_ALLOC 4

43
44
45
/******************************************************************************/
/* list                                                                       */

46
STATIC void list_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
47
    mp_obj_list_t *o = o_in;
48
49
50
    if (!(MICROPY_PY_UJSON && kind == PRINT_JSON)) {
        kind = PRINT_REPR;
    }
51
    print(env, "[");
52
    for (mp_uint_t i = 0; i < o->len; i++) {
53
54
55
        if (i > 0) {
            print(env, ", ");
        }
56
        mp_obj_print_helper(print, env, o->items[i], kind);
57
58
59
60
    }
    print(env, "]");
}

61
62
63
STATIC mp_obj_t list_extend_from_iter(mp_obj_t list, mp_obj_t iterable) {
    mp_obj_t iter = mp_getiter(iterable);
    mp_obj_t item;
64
    while ((item = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
65
66
67
68
69
        mp_obj_list_append(list, item);
    }
    return list;
}

70
STATIC mp_obj_t list_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
71
    mp_arg_check_num(n_args, n_kw, 0, 1, false);
72

73
74
75
    switch (n_args) {
        case 0:
            // return a new, empty list
76
            return mp_obj_new_list(0, NULL);
77
78

        case 1:
79
        default: {
80
            // make list from iterable
81
            // TODO: optimize list/tuple
82
            mp_obj_t list = mp_obj_new_list(0, NULL);
83
            return list_extend_from_iter(list, args[0]);
84
85
86
87
        }
    }
}

Damien George's avatar
Damien George committed
88
// Don't pass MP_BINARY_OP_NOT_EQUAL here
89
STATIC bool list_cmp_helper(mp_uint_t op, mp_obj_t self_in, mp_obj_t another_in) {
90
91
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
    if (!MP_OBJ_IS_TYPE(another_in, &mp_type_list)) {
92
93
94
95
96
        return false;
    }
    mp_obj_list_t *self = self_in;
    mp_obj_list_t *another = another_in;

97
    return mp_seq_cmp_objs(op, self->items, self->len, another->items, another->len);
98
99
}

100
STATIC mp_obj_t list_unary_op(mp_uint_t op, mp_obj_t self_in) {
101
102
    mp_obj_list_t *self = self_in;
    switch (op) {
Damien George's avatar
Damien George committed
103
104
        case MP_UNARY_OP_BOOL: return MP_BOOL(self->len != 0);
        case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
105
        default: return MP_OBJ_NULL; // op not supported
106
107
108
    }
}

109
STATIC mp_obj_t list_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs) {
110
111
    mp_obj_list_t *o = lhs;
    switch (op) {
112
        case MP_BINARY_OP_ADD: {
113
            if (!MP_OBJ_IS_TYPE(rhs, &mp_type_list)) {
114
                return MP_OBJ_NULL; // op not supported
John R. Lenton's avatar
John R. Lenton committed
115
116
117
            }
            mp_obj_list_t *p = rhs;
            mp_obj_list_t *s = list_new(o->len + p->len);
118
            mp_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
John R. Lenton's avatar
John R. Lenton committed
119
            return s;
120
        }
121
        case MP_BINARY_OP_INPLACE_ADD: {
122
            if (!MP_OBJ_IS_TYPE(rhs, &mp_type_list)) {
123
                return MP_OBJ_NULL; // op not supported
124
125
126
127
            }
            list_extend(lhs, rhs);
            return o;
        }
128
        case MP_BINARY_OP_MULTIPLY: {
129
            mp_int_t n;
130
            if (!mp_obj_get_int_maybe(rhs, &n)) {
131
                return MP_OBJ_NULL; // op not supported
132
            }
133
134
135
            if (n < 0) {
                n = 0;
            }
136
137
            mp_obj_list_t *s = list_new(o->len * n);
            mp_seq_multiply(o->items, sizeof(*o->items), o->len, n, s->items);
138
139
            return s;
        }
Damien George's avatar
Damien George committed
140
141
142
143
144
        case MP_BINARY_OP_EQUAL:
        case MP_BINARY_OP_LESS:
        case MP_BINARY_OP_LESS_EQUAL:
        case MP_BINARY_OP_MORE:
        case MP_BINARY_OP_MORE_EQUAL:
145
146
            return MP_BOOL(list_cmp_helper(op, lhs, rhs));

147
        default:
148
            return MP_OBJ_NULL; // op not supported
149
150
151
    }
}

152
STATIC mp_obj_t list_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
153
    if (value == MP_OBJ_NULL) {
154
        // delete
155
#if MICROPY_PY_BUILTINS_SLICE
156
157
        if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
            mp_obj_list_t *self = self_in;
158
159
            mp_bound_slice_t slice;
            if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice)) {
160
161
162
                assert(0);
            }

163
            mp_int_t len_adj = slice.start - slice.stop;
164
165
            //printf("Len adj: %d\n", len_adj);
            assert(len_adj <= 0);
166
            mp_seq_replace_slice_no_grow(self->items, self->len, slice.start, slice.stop, self->items/*NULL*/, 0, mp_obj_t);
167
168
169
170
171
172
            // Clear "freed" elements at the end of list
            mp_seq_clear(self->items, self->len + len_adj, self->len, sizeof(*self->items));
            self->len += len_adj;
            return mp_const_none;
        }
#endif
173
174
        mp_obj_t args[2] = {self_in, index};
        list_pop(2, args);
175
176
177
178
        return mp_const_none;
    } else if (value == MP_OBJ_SENTINEL) {
        // load
        mp_obj_list_t *self = self_in;
179
#if MICROPY_PY_BUILTINS_SLICE
180
        if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
181
182
            mp_bound_slice_t slice;
            if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice)) {
183
                return mp_seq_extract_slice(self->len, self->items, &slice);
184
            }
185
186
            mp_obj_list_t *res = list_new(slice.stop - slice.start);
            mp_seq_copy(res->items, self->items + slice.start, res->len, mp_obj_t);
187
188
189
            return res;
        }
#endif
190
        mp_uint_t index_val = mp_get_index(self->base.type, self->len, index, false);
191
        return self->items[index_val];
192
    } else {
193
#if MICROPY_PY_BUILTINS_SLICE
194
195
196
197
        if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
            mp_obj_list_t *self = self_in;
            assert(MP_OBJ_IS_TYPE(value, &mp_type_list));
            mp_obj_list_t *slice = value;
198
199
            mp_bound_slice_t slice_out;
            if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice_out)) {
200
201
                assert(0);
            }
202
            mp_int_t len_adj = slice->len - (slice_out.stop - slice_out.start);
203
            //printf("Len adj: %d\n", len_adj);
204
205
206
207
208
209
210
            if (len_adj > 0) {
                if (self->len + len_adj > self->alloc) {
                    // TODO: Might optimize memory copies here by checking if block can
                    // be grown inplace or not
                    self->items = m_renew(mp_obj_t, self->items, self->alloc, self->len + len_adj);
                    self->alloc = self->len + len_adj;
                }
211
212
                mp_seq_replace_slice_grow_inplace(self->items, self->len,
                    slice_out.start, slice_out.stop, slice->items, slice->len, len_adj, mp_obj_t);
213
            } else {
214
215
                mp_seq_replace_slice_no_grow(self->items, self->len,
                    slice_out.start, slice_out.stop, slice->items, slice->len, mp_obj_t);
216
217
218
219
                // Clear "freed" elements at the end of list
                mp_seq_clear(self->items, self->len + len_adj, self->len, sizeof(*self->items));
                // TODO: apply allocation policy re: alloc_size
            }
220
221
222
223
            self->len += len_adj;
            return mp_const_none;
        }
#endif
224
        mp_obj_list_store(self_in, index, value);
225
        return mp_const_none;
226
227
228
    }
}

229
STATIC mp_obj_t list_getiter(mp_obj_t o_in) {
230
231
232
233
    return mp_obj_new_list_iterator(o_in, 0);
}

mp_obj_t mp_obj_list_append(mp_obj_t self_in, mp_obj_t arg) {
234
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
235
236
    mp_obj_list_t *self = self_in;
    if (self->len >= self->alloc) {
237
        self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc * 2);
238
        self->alloc *= 2;
239
        mp_seq_clear(self->items, self->len + 1, self->alloc, sizeof(*self->items));
240
241
242
243
244
    }
    self->items[self->len++] = arg;
    return mp_const_none; // return None, as per CPython
}

245
STATIC mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in) {
246
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
247
248
249
250
251
252
253
254
    if (MP_OBJ_IS_TYPE(arg_in, &mp_type_list)) {
        mp_obj_list_t *self = self_in;
        mp_obj_list_t *arg = arg_in;

        if (self->len + arg->len > self->alloc) {
            // TODO: use alloc policy for "4"
            self->items = m_renew(mp_obj_t, self->items, self->alloc, self->len + arg->len + 4);
            self->alloc = self->len + arg->len + 4;
255
            mp_seq_clear(self->items, self->len + arg->len, self->alloc, sizeof(*self->items));
256
        }
257

258
259
260
261
        memcpy(self->items + self->len, arg->items, sizeof(mp_obj_t) * arg->len);
        self->len += arg->len;
    } else {
        list_extend_from_iter(self_in, arg_in);
262
263
264
265
    }
    return mp_const_none; // return None, as per CPython
}

266
STATIC mp_obj_t list_pop(mp_uint_t n_args, const mp_obj_t *args) {
John R. Lenton's avatar
John R. Lenton committed
267
    assert(1 <= n_args && n_args <= 2);
268
    assert(MP_OBJ_IS_TYPE(args[0], &mp_type_list));
John R. Lenton's avatar
John R. Lenton committed
269
270
    mp_obj_list_t *self = args[0];
    if (self->len == 0) {
271
        nlr_raise(mp_obj_new_exception_msg(&mp_type_IndexError, "pop from empty list"));
John R. Lenton's avatar
John R. Lenton committed
272
    }
273
    mp_uint_t index = mp_get_index(self->base.type, self->len, n_args == 1 ? MP_OBJ_NEW_SMALL_INT(-1) : args[1], false);
274
275
    mp_obj_t ret = self->items[index];
    self->len -= 1;
276
    memmove(self->items + index, self->items + index + 1, (self->len - index) * sizeof(mp_obj_t));
277
278
    // Clear stale pointer from slot which just got freed to prevent GC issues
    self->items[self->len] = MP_OBJ_NULL;
279
    if (self->alloc > LIST_MIN_ALLOC && self->alloc > 2 * self->len) {
John R. Lenton's avatar
John R. Lenton committed
280
281
282
        self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc/2);
        self->alloc /= 2;
    }
283
284
285
286
    return ret;
}

// TODO make this conform to CPython's definition of sort
287
STATIC void mp_quicksort(mp_obj_t *head, mp_obj_t *tail, mp_obj_t key_fn, bool reversed) {
288
    mp_uint_t op = reversed ? MP_BINARY_OP_MORE : MP_BINARY_OP_LESS;
289
290
291
    while (head < tail) {
        mp_obj_t *h = head - 1;
        mp_obj_t *t = tail;
Damien George's avatar
Damien George committed
292
        mp_obj_t v = key_fn == NULL ? tail[0] : mp_call_function_1(key_fn, tail[0]); // get pivot using key_fn
293
        for (;;) {
Damien George's avatar
Damien George committed
294
295
            do ++h; while (mp_binary_op(op, key_fn == NULL ? h[0] : mp_call_function_1(key_fn, h[0]), v) == mp_const_true);
            do --t; while (h < t && mp_binary_op(op, v, key_fn == NULL ? t[0] : mp_call_function_1(key_fn, t[0])) == mp_const_true);
296
297
298
299
300
301
302
303
            if (h >= t) break;
            mp_obj_t x = h[0];
            h[0] = t[0];
            t[0] = x;
        }
        mp_obj_t x = h[0];
        h[0] = tail[0];
        tail[0] = x;
304
        mp_quicksort(head, t, key_fn, reversed);
305
306
307
308
        head = h + 1;
    }
}

309
mp_obj_t mp_obj_list_sort(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
310
    assert(n_args >= 1);
311
    assert(MP_OBJ_IS_TYPE(args[0], &mp_type_list));
312
    if (n_args > 1) {
313
        nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
314
315
                                          "list.sort takes no positional arguments"));
    }
316
    mp_obj_list_t *self = args[0];
317
    if (self->len > 1) {
318
319
        mp_map_elem_t *keyfun = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(MP_QSTR_key), MP_MAP_LOOKUP);
        mp_map_elem_t *reverse = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(MP_QSTR_reverse), MP_MAP_LOOKUP);
320
321
        mp_quicksort(self->items, self->items + self->len - 1,
                     keyfun ? keyfun->value : NULL,
Damien George's avatar
Damien George committed
322
                     reverse && reverse->value ? mp_obj_is_true(reverse->value) : false);
323
324
325
326
    }
    return mp_const_none; // return None, as per CPython
}

327
STATIC mp_obj_t list_clear(mp_obj_t self_in) {
328
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
329
330
    mp_obj_list_t *self = self_in;
    self->len = 0;
331
332
    self->items = m_renew(mp_obj_t, self->items, self->alloc, LIST_MIN_ALLOC);
    self->alloc = LIST_MIN_ALLOC;
333
    mp_seq_clear(self->items, 0, self->alloc, sizeof(*self->items));
334
335
336
    return mp_const_none;
}

337
STATIC mp_obj_t list_copy(mp_obj_t self_in) {
338
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
339
340
341
342
    mp_obj_list_t *self = self_in;
    return mp_obj_new_list(self->len, self->items);
}

343
STATIC mp_obj_t list_count(mp_obj_t self_in, mp_obj_t value) {
344
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
John R. Lenton's avatar
John R. Lenton committed
345
    mp_obj_list_t *self = self_in;
346
    return mp_seq_count_obj(self->items, self->len, value);
John R. Lenton's avatar
John R. Lenton committed
347
348
}

349
STATIC mp_obj_t list_index(mp_uint_t n_args, const mp_obj_t *args) {
350
    assert(2 <= n_args && n_args <= 4);
351
    assert(MP_OBJ_IS_TYPE(args[0], &mp_type_list));
352
    mp_obj_list_t *self = args[0];
353
    return mp_seq_index_obj(self->items, self->len, n_args, args);
354
355
}

356
STATIC mp_obj_t list_insert(mp_obj_t self_in, mp_obj_t idx, mp_obj_t obj) {
357
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
358
359
    mp_obj_list_t *self = self_in;
    // insert has its own strange index logic
360
    mp_int_t index = MP_OBJ_SMALL_INT_VALUE(idx);
361
362
363
364
365
366
    if (index < 0) {
         index += self->len;
    }
    if (index < 0) {
         index = 0;
    }
367
    if ((mp_uint_t)index > self->len) {
368
369
370
371
372
         index = self->len;
    }

    mp_obj_list_append(self_in, mp_const_none);

373
    for (mp_int_t i = self->len-1; i > index; i--) {
374
375
376
377
378
379
380
         self->items[i] = self->items[i-1];
    }
    self->items[index] = obj;

    return mp_const_none;
}

381
STATIC mp_obj_t list_remove(mp_obj_t self_in, mp_obj_t value) {
382
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
383
384
385
386
387
388
389
    mp_obj_t args[] = {self_in, value};
    args[1] = list_index(2, args);
    list_pop(2, args);

    return mp_const_none;
}

390
STATIC mp_obj_t list_reverse(mp_obj_t self_in) {
391
    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
392
393
    mp_obj_list_t *self = self_in;

394
395
    mp_int_t len = self->len;
    for (mp_int_t i = 0; i < len/2; i++) {
396
397
398
399
400
401
402
403
         mp_obj_t *a = self->items[i];
         self->items[i] = self->items[len-i-1];
         self->items[len-i-1] = a;
    }

    return mp_const_none;
}

404
405
406
407
408
409
410
411
412
413
414
415
STATIC MP_DEFINE_CONST_FUN_OBJ_2(list_append_obj, mp_obj_list_append);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(list_extend_obj, list_extend);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(list_clear_obj, list_clear);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(list_copy_obj, list_copy);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(list_count_obj, list_count);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(list_index_obj, 2, 4, list_index);
STATIC MP_DEFINE_CONST_FUN_OBJ_3(list_insert_obj, list_insert);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(list_pop_obj, 1, 2, list_pop);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(list_remove_obj, list_remove);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(list_reverse_obj, list_reverse);
STATIC MP_DEFINE_CONST_FUN_OBJ_KW(list_sort_obj, 0, mp_obj_list_sort);

416
417
418
419
420
421
422
423
424
425
426
427
STATIC const mp_map_elem_t list_locals_dict_table[] = {
    { MP_OBJ_NEW_QSTR(MP_QSTR_append), (mp_obj_t)&list_append_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_clear), (mp_obj_t)&list_clear_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_copy), (mp_obj_t)&list_copy_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_count), (mp_obj_t)&list_count_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_extend), (mp_obj_t)&list_extend_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_index), (mp_obj_t)&list_index_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_insert), (mp_obj_t)&list_insert_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_pop), (mp_obj_t)&list_pop_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_remove), (mp_obj_t)&list_remove_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_reverse), (mp_obj_t)&list_reverse_obj },
    { MP_OBJ_NEW_QSTR(MP_QSTR_sort), (mp_obj_t)&list_sort_obj },
ian-v's avatar
ian-v committed
428
};
429

430
431
STATIC MP_DEFINE_CONST_DICT(list_locals_dict, list_locals_dict_table);

432
const mp_obj_type_t mp_type_list = {
433
    { &mp_type_type },
434
    .name = MP_QSTR_list,
435
436
    .print = list_print,
    .make_new = list_make_new,
437
    .unary_op = list_unary_op,
438
    .binary_op = list_binary_op,
439
    .subscr = list_subscr,
440
    .getiter = list_getiter,
441
    .locals_dict = (mp_obj_t)&list_locals_dict,
442
443
};

444
void mp_obj_list_init(mp_obj_list_t *o, mp_uint_t n) {
445
    o->base.type = &mp_type_list;
446
    o->alloc = n < LIST_MIN_ALLOC ? LIST_MIN_ALLOC : n;
447
448
    o->len = n;
    o->items = m_new(mp_obj_t, o->alloc);
449
    mp_seq_clear(o->items, n, o->alloc, sizeof(*o->items));
450
451
}

452
STATIC mp_obj_list_t *list_new(mp_uint_t n) {
453
454
    mp_obj_list_t *o = m_new_obj(mp_obj_list_t);
    mp_obj_list_init(o, n);
455
456
457
    return o;
}

458
mp_obj_t mp_obj_new_list(mp_uint_t n, mp_obj_t *items) {
459
    mp_obj_list_t *o = list_new(n);
460
    if (items != NULL) {
461
        for (mp_uint_t i = 0; i < n; i++) {
462
463
            o->items[i] = items[i];
        }
464
465
466
467
    }
    return o;
}

468
void mp_obj_list_get(mp_obj_t self_in, mp_uint_t *len, mp_obj_t **items) {
469
470
471
472
473
    mp_obj_list_t *self = self_in;
    *len = self->len;
    *items = self->items;
}

474
void mp_obj_list_set_len(mp_obj_t self_in, mp_uint_t len) {
475
476
477
478
479
480
    // trust that the caller knows what it's doing
    // TODO realloc if len got much smaller than alloc
    mp_obj_list_t *self = self_in;
    self->len = len;
}

481
482
void mp_obj_list_store(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
    mp_obj_list_t *self = self_in;
483
    mp_uint_t i = mp_get_index(self->base.type, self->len, index, false);
484
485
486
487
488
489
490
491
492
    self->items[i] = value;
}

/******************************************************************************/
/* list iterator                                                              */

typedef struct _mp_obj_list_it_t {
    mp_obj_base_t base;
    mp_obj_list_t *list;
493
    mp_uint_t cur;
494
495
} mp_obj_list_it_t;

496
STATIC mp_obj_t list_it_iternext(mp_obj_t self_in) {
497
498
499
500
501
502
    mp_obj_list_it_t *self = self_in;
    if (self->cur < self->list->len) {
        mp_obj_t o_out = self->list->items[self->cur];
        self->cur += 1;
        return o_out;
    } else {
503
        return MP_OBJ_STOP_ITERATION;
504
505
506
    }
}

507
STATIC const mp_obj_type_t mp_type_list_it = {
508
    { &mp_type_type },
509
    .name = MP_QSTR_iterator,
510
    .getiter = mp_identity,
511
    .iternext = list_it_iternext,
512
513
};

514
mp_obj_t mp_obj_new_list_iterator(mp_obj_list_t *list, mp_uint_t cur) {
515
    mp_obj_list_it_t *o = m_new_obj(mp_obj_list_it_t);
516
    o->base.type = &mp_type_list_it;
517
518
519
520
    o->list = list;
    o->cur = cur;
    return o;
}