objlist.c 14.9 KB
Newer Older
1
2
3
4
5
6
7
8
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>

#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
9
#include "mpqstr.h"
10
#include "obj.h"
11
#include "map.h"
12
13
14
15
16
17
18
19
20
21
22
#include "runtime0.h"
#include "runtime.h"

typedef struct _mp_obj_list_t {
    mp_obj_base_t base;
    machine_uint_t alloc;
    machine_uint_t len;
    mp_obj_t *items;
} mp_obj_list_t;

static mp_obj_t mp_obj_new_list_iterator(mp_obj_list_t *list, int cur);
23
static mp_obj_list_t *list_new(uint n);
24
static mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in);
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40

/******************************************************************************/
/* list                                                                       */

static void list_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
    mp_obj_list_t *o = o_in;
    print(env, "[");
    for (int i = 0; i < o->len; i++) {
        if (i > 0) {
            print(env, ", ");
        }
        mp_obj_print_helper(print, env, o->items[i]);
    }
    print(env, "]");
}

41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
static mp_obj_t list_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
    switch (n_args) {
        case 0:
            // return a new, empty list
            return rt_build_list(0, NULL);

        case 1:
        {
            // make list from iterable
            mp_obj_t iterable = rt_getiter(args[0]);
            mp_obj_t list = rt_build_list(0, NULL);
            mp_obj_t item;
            while ((item = rt_iternext(iterable)) != mp_const_stop_iteration) {
                rt_list_append(list, item);
            }
            return list;
        }

        default:
            nlr_jump(mp_obj_new_exception_msg_1_arg(MP_QSTR_TypeError, "list takes at most 1 argument, %d given", (void*)(machine_int_t)n_args));
    }
62
    return NULL;
63
64
}

65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
// Don't pass RT_COMPARE_OP_NOT_EQUAL here
static bool list_cmp_helper(int op, mp_obj_t self_in, mp_obj_t another_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    if (!MP_OBJ_IS_TYPE(another_in, &list_type)) {
        return false;
    }
    mp_obj_list_t *self = self_in;
    mp_obj_list_t *another = another_in;
    if (op == RT_COMPARE_OP_EQUAL && self->len != another->len) {
        return false;
    }

    // Let's deal only with > & >=
    if (op == RT_COMPARE_OP_LESS || op == RT_COMPARE_OP_LESS_EQUAL) {
        mp_obj_t t = self;
        self = another;
        another = t;
        if (op == RT_COMPARE_OP_LESS) {
            op = RT_COMPARE_OP_MORE;
        } else {
            op = RT_COMPARE_OP_MORE_EQUAL;
        }
    }

    int len = self->len < another->len ? self->len : another->len;
    bool eq_status = true; // empty lists are equal
    bool rel_status;
    for (int i = 0; i < len; i++) {
        eq_status = mp_obj_equal(self->items[i], another->items[i]);
        if (op == RT_COMPARE_OP_EQUAL && !eq_status) {
            return false;
        }
        rel_status = (rt_binary_op(op, self->items[i], another->items[i]) == mp_const_true);
        if (!eq_status && !rel_status) {
            return false;
        }
    }

    // If we had tie in the last element...
    if (eq_status) {
        // ... and we have lists of different lengths...
        if (self->len != another->len) {
            if (self->len < another->len) {
                // ... then longer list length wins (we deal only with >)
                return false;
            }
        } else if (op == RT_COMPARE_OP_MORE) {
            // Otherwise, if we have strict relation, equality means failure
            return false;
        }
    }

    return true;
}

120
121
122
123
124
125
126
127
128
static mp_obj_t list_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
    mp_obj_list_t *o = lhs;
    switch (op) {
        case RT_BINARY_OP_SUBSCR:
        {
            // list load
            uint index = mp_get_index(o->base.type, o->len, rhs);
            return o->items[index];
        }
129
130
        case RT_BINARY_OP_ADD:
        {
John R. Lenton's avatar
John R. Lenton committed
131
132
133
134
135
            if (!MP_OBJ_IS_TYPE(rhs, &list_type)) {
                return NULL;
            }
            mp_obj_list_t *p = rhs;
            mp_obj_list_t *s = list_new(o->len + p->len);
John R. Lenton's avatar
John R. Lenton committed
136
137
            memcpy(s->items, o->items, sizeof(mp_obj_t) * o->len);
            memcpy(s->items + o->len, p->items, sizeof(mp_obj_t) * p->len);
John R. Lenton's avatar
John R. Lenton committed
138
            return s;
139
        }
140
141
142
143
144
145
146
147
        case RT_BINARY_OP_INPLACE_ADD:
        {
            if (!MP_OBJ_IS_TYPE(rhs, &list_type)) {
                return NULL;
            }
            list_extend(lhs, rhs);
            return o;
        }
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
        case RT_BINARY_OP_MULTIPLY:
        {
            if (!MP_OBJ_IS_SMALL_INT(rhs)) {
                return NULL;
            }
            int n = MP_OBJ_SMALL_INT_VALUE(rhs);
            int len = o->len;
            mp_obj_list_t *s = list_new(len * n);
            mp_obj_t *dest = s->items;
            for (int i = 0; i < n; i++) {
                memcpy(dest, o->items, sizeof(mp_obj_t) * len);
                dest += len;
            }
            return s;
        }
163
164
165
166
167
168
169
170
171
        case RT_COMPARE_OP_EQUAL:
        case RT_COMPARE_OP_LESS:
        case RT_COMPARE_OP_LESS_EQUAL:
        case RT_COMPARE_OP_MORE:
        case RT_COMPARE_OP_MORE_EQUAL:
            return MP_BOOL(list_cmp_helper(op, lhs, rhs));
        case RT_COMPARE_OP_NOT_EQUAL:
            return MP_BOOL(!list_cmp_helper(RT_COMPARE_OP_EQUAL, lhs, rhs));

172
173
174
175
176
177
178
179
180
181
182
183
184
185
        default:
            // op not supported
            return NULL;
    }
}

static mp_obj_t list_getiter(mp_obj_t o_in) {
    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) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    if (self->len >= self->alloc) {
186
        self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc * 2);
187
188
189
190
191
192
        self->alloc *= 2;
    }
    self->items[self->len++] = arg;
    return mp_const_none; // return None, as per CPython
}

193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
static mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    assert(MP_OBJ_IS_TYPE(arg_in, &list_type));
    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;
    }

    memcpy(self->items + self->len, arg->items, sizeof(mp_obj_t) * arg->len);
    self->len += arg->len;
    return mp_const_none; // return None, as per CPython
}

John R. Lenton's avatar
John R. Lenton committed
210
211
212
213
214
static mp_obj_t list_pop(int n_args, const mp_obj_t *args) {
    assert(1 <= n_args && n_args <= 2);
    assert(MP_OBJ_IS_TYPE(args[0], &list_type));
    mp_obj_list_t *self = args[0];
    if (self->len == 0) {
215
        nlr_jump(mp_obj_new_exception_msg(MP_QSTR_IndexError, "pop from empty list"));
John R. Lenton's avatar
John R. Lenton committed
216
217
    }
    uint index = mp_get_index(self->base.type, self->len, n_args == 1 ? mp_obj_new_int(-1) : args[1]);
218
219
220
    mp_obj_t ret = self->items[index];
    self->len -= 1;
    memcpy(self->items + index, self->items + index + 1, (self->len - index) * sizeof(mp_obj_t));
John R. Lenton's avatar
John R. Lenton committed
221
222
223
224
    if (self->alloc > 2 * self->len) {
        self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc/2);
        self->alloc /= 2;
    }
225
226
227
228
    return ret;
}

// TODO make this conform to CPython's definition of sort
229
230
static void mp_quicksort(mp_obj_t *head, mp_obj_t *tail, mp_obj_t key_fn, bool reversed) {
    int op = reversed ? RT_COMPARE_OP_MORE : RT_COMPARE_OP_LESS;
231
232
233
    while (head < tail) {
        mp_obj_t *h = head - 1;
        mp_obj_t *t = tail;
234
        mp_obj_t v = key_fn == NULL ? tail[0] : rt_call_function_1(key_fn, tail[0]); // get pivot using key_fn
235
        for (;;) {
John R. Lenton's avatar
John R. Lenton committed
236
237
            do ++h; while (rt_binary_op(op, key_fn == NULL ? h[0] : rt_call_function_1(key_fn, h[0]), v) == mp_const_true);
            do --t; while (h < t && rt_binary_op(op, v, key_fn == NULL ? t[0] : rt_call_function_1(key_fn, t[0])) == mp_const_true);
238
239
240
241
242
243
244
245
            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;
246
        mp_quicksort(head, t, key_fn, reversed);
247
248
249
250
        head = h + 1;
    }
}

John R. Lenton's avatar
sorted    
John R. Lenton committed
251
mp_obj_t list_sort(mp_obj_t args, mp_map_t *kwargs) {
252
    mp_obj_t *args_items = NULL;
253
    uint args_len = 0;
254
255
256
257

    assert(MP_OBJ_IS_TYPE(args, &tuple_type));
    mp_obj_tuple_get(args, &args_len, &args_items);
    assert(args_len >= 1);
John R. Lenton's avatar
sorted    
John R. Lenton committed
258
    assert(MP_OBJ_IS_TYPE(args_items[0], &list_type));
259
260
261
262
263
    if (args_len > 1) {
        nlr_jump(mp_obj_new_exception_msg(MP_QSTR_TypeError,
                                          "list.sort takes no positional arguments"));
    }
    mp_obj_list_t *self = args_items[0];
264
    if (self->len > 1) {
265
266
        mp_map_elem_t *keyfun = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(qstr_from_str_static("key")), MP_MAP_LOOKUP);
        mp_map_elem_t *reverse = mp_map_lookup(kwargs, MP_OBJ_NEW_QSTR(qstr_from_str_static("reverse")), MP_MAP_LOOKUP);
267
268
269
        mp_quicksort(self->items, self->items + self->len - 1,
                     keyfun ? keyfun->value : NULL,
                     reverse && reverse->value ? rt_is_true(reverse->value) : false);
270
271
272
273
    }
    return mp_const_none; // return None, as per CPython
}

274
275
276
277
278
279
280
281
282
static mp_obj_t list_clear(mp_obj_t self_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    self->len = 0;
    self->items = m_renew(mp_obj_t, self->items, self->alloc, 4);
    self->alloc = 4;
    return mp_const_none;
}

283
284
285
286
287
288
static mp_obj_t list_copy(mp_obj_t self_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    return mp_obj_new_list(self->len, self->items);
}

John R. Lenton's avatar
John R. Lenton committed
289
290
291
292
293
294
295
296
297
298
299
300
301
static mp_obj_t list_count(mp_obj_t self_in, mp_obj_t value) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    int count = 0;
    for (int i = 0; i < self->len; i++) {
         if (mp_obj_equal(self->items[i], value)) {
              count++;
         }
    }

    return mp_obj_new_int(count);
}

302
303
304
305
306
static mp_obj_t list_index(int n_args, const mp_obj_t *args) {
    assert(2 <= n_args && n_args <= 4);
    assert(MP_OBJ_IS_TYPE(args[0], &list_type));
    mp_obj_list_t *self = args[0];
    mp_obj_t *value = args[1];
307
308
    uint start = 0;
    uint stop = self->len;
309

310
311
312
313
314
315
    if (n_args >= 3) {
        start = mp_get_index(self->base.type, self->len, args[2]);
        if (n_args >= 4) {
            stop = mp_get_index(self->base.type, self->len, args[3]);
        }
    }
316

317
    for (uint i = start; i < stop; i++) {
318
319
320
321
322
         if (mp_obj_equal(self->items[i], value)) {
              return mp_obj_new_int(i);
         }
    }

323
    nlr_jump(mp_obj_new_exception_msg(MP_QSTR_ValueError, "object not in list"));
324
325
}

326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
static mp_obj_t list_insert(mp_obj_t self_in, mp_obj_t idx, mp_obj_t obj) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    // insert has its own strange index logic
    int index = MP_OBJ_SMALL_INT_VALUE(idx);
    if (index < 0) {
         index += self->len;
    }
    if (index < 0) {
         index = 0;
    }
    if (index > self->len) {
         index = self->len;
    }

    mp_obj_list_append(self_in, mp_const_none);

    for (int i = self->len-1; i > index; i--) {
         self->items[i] = self->items[i-1];
    }
    self->items[index] = obj;

    return mp_const_none;
}

351
352
353
354
355
356
357
358
359
static mp_obj_t list_remove(mp_obj_t self_in, mp_obj_t value) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_t args[] = {self_in, value};
    args[1] = list_index(2, args);
    list_pop(2, args);

    return mp_const_none;
}

360
361
362
363
364
365
366
367
368
369
370
371
372
373
static mp_obj_t list_reverse(mp_obj_t self_in) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;

    int len = self->len;
    for (int i = 0; i < len/2; i++) {
         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;
}

374
static MP_DEFINE_CONST_FUN_OBJ_2(list_append_obj, mp_obj_list_append);
375
static MP_DEFINE_CONST_FUN_OBJ_2(list_extend_obj, list_extend);
376
static MP_DEFINE_CONST_FUN_OBJ_1(list_clear_obj, list_clear);
377
static MP_DEFINE_CONST_FUN_OBJ_1(list_copy_obj, list_copy);
John R. Lenton's avatar
John R. Lenton committed
378
static MP_DEFINE_CONST_FUN_OBJ_2(list_count_obj, list_count);
379
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(list_index_obj, 2, 4, list_index);
380
static MP_DEFINE_CONST_FUN_OBJ_3(list_insert_obj, list_insert);
John R. Lenton's avatar
John R. Lenton committed
381
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(list_pop_obj, 1, 2, list_pop);
382
static MP_DEFINE_CONST_FUN_OBJ_2(list_remove_obj, list_remove);
383
static MP_DEFINE_CONST_FUN_OBJ_1(list_reverse_obj, list_reverse);
384
static MP_DEFINE_CONST_FUN_OBJ_KW(list_sort_obj, list_sort);
385

ian-v's avatar
ian-v committed
386
static const mp_method_t list_type_methods[] = {
ian-v's avatar
ian-v committed
387
388
389
390
    { "append", &list_append_obj },
    { "clear", &list_clear_obj },
    { "copy", &list_copy_obj },
    { "count", &list_count_obj },
391
    { "extend", &list_extend_obj },
ian-v's avatar
ian-v committed
392
    { "index", &list_index_obj },
393
    { "insert", &list_insert_obj },
ian-v's avatar
ian-v committed
394
395
396
397
398
399
    { "pop", &list_pop_obj },
    { "remove", &list_remove_obj },
    { "reverse", &list_reverse_obj },
    { "sort", &list_sort_obj },
    { NULL, NULL }, // end-of-list sentinel
};
400

401
const mp_obj_type_t list_type = {
402
403
    { &mp_const_type },
    "list",
404
405
406
407
    .print = list_print,
    .make_new = list_make_new,
    .binary_op = list_binary_op,
    .getiter = list_getiter,
ian-v's avatar
ian-v committed
408
    .methods = list_type_methods,
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
};

static mp_obj_list_t *list_new(uint n) {
    mp_obj_list_t *o = m_new_obj(mp_obj_list_t);
    o->base.type = &list_type;
    o->alloc = n < 4 ? 4 : n;
    o->len = n;
    o->items = m_new(mp_obj_t, o->alloc);
    return o;
}

mp_obj_t mp_obj_new_list(uint n, mp_obj_t *items) {
    mp_obj_list_t *o = list_new(n);
    for (int i = 0; i < n; i++) {
        o->items[i] = items[i];
    }
    return o;
}

mp_obj_t mp_obj_new_list_reverse(uint n, mp_obj_t *items) {
    mp_obj_list_t *o = list_new(n);
    for (int i = 0; i < n; i++) {
        o->items[i] = items[n - i - 1];
    }
    return o;
}

void mp_obj_list_get(mp_obj_t self_in, uint *len, mp_obj_t **items) {
    mp_obj_list_t *self = self_in;
    *len = self->len;
    *items = self->items;
}

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;
    uint i = mp_get_index(self->base.type, self->len, index);
    self->items[i] = value;
}

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

typedef struct _mp_obj_list_it_t {
    mp_obj_base_t base;
    mp_obj_list_t *list;
    machine_uint_t cur;
} mp_obj_list_it_t;

mp_obj_t list_it_iternext(mp_obj_t self_in) {
    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 {
        return mp_const_stop_iteration;
    }
}

static const mp_obj_type_t list_it_type = {
469
470
    { &mp_const_type },
    "list_iterator",
471
    .iternext = list_it_iternext,
472
473
474
475
476
477
478
479
480
};

mp_obj_t mp_obj_new_list_iterator(mp_obj_list_t *list, int cur) {
    mp_obj_list_it_t *o = m_new_obj(mp_obj_list_it_t);
    o->base.type = &list_it_type;
    o->list = list;
    o->cur = cur;
    return o;
}