objlist.c 6.28 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>

#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "obj.h"
#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);
21
static mp_obj_list_t *list_new(uint n);
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

/******************************************************************************/
/* 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, "]");
}

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];
        }
47
48
        case RT_BINARY_OP_ADD:
        {
John R. Lenton's avatar
John R. Lenton committed
49
50
51
52
53
54
55
56
57
58
59
60
            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);
            for (int i = 0; i < o->len; i++) {
                s->items[i] = o->items[i];
            }
            for (int i = 0; i < p->len; i++) {
                s->items[i+o->len] = p->items[i];
            }
            return s;
61
        }
62
63
64
65
66
67
68
69
70
71
72
73
74
75
        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) {
76
        self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc * 2);
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
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
        self->alloc *= 2;
    }
    self->items[self->len++] = arg;
    return mp_const_none; // return None, as per CPython
}

static mp_obj_t list_pop(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;
    uint index = mp_get_index(self->base.type, self->len, arg);
    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));
    return ret;
}

// TODO make this conform to CPython's definition of sort
static void mp_quicksort(mp_obj_t *head, mp_obj_t *tail, mp_obj_t key_fn) {
    while (head < tail) {
        mp_obj_t *h = head - 1;
        mp_obj_t *t = tail;
        mp_obj_t v = rt_call_function_1(key_fn, tail[0]); // get pivot using key_fn
        for (;;) {
            do ++h; while (rt_compare_op(RT_COMPARE_OP_LESS, rt_call_function_1(key_fn, h[0]), v) == mp_const_true);
            do --t; while (h < t && rt_compare_op(RT_COMPARE_OP_LESS, v, rt_call_function_1(key_fn, t[0])) == mp_const_true);
            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;
        mp_quicksort(head, t, key_fn);
        head = h + 1;
    }
}

static mp_obj_t list_sort(mp_obj_t self_in, mp_obj_t key_fn) {
    assert(MP_OBJ_IS_TYPE(self_in, &list_type));
    mp_obj_list_t *self = self_in;
    if (self->len > 1) {
        mp_quicksort(self->items, self->items + self->len - 1, key_fn);
    }
    return mp_const_none; // return None, as per CPython
}

static MP_DEFINE_CONST_FUN_OBJ_2(list_append_obj, mp_obj_list_append);
static MP_DEFINE_CONST_FUN_OBJ_2(list_pop_obj, list_pop);
static MP_DEFINE_CONST_FUN_OBJ_2(list_sort_obj, list_sort);

const mp_obj_type_t list_type = {
    { &mp_const_type },
    "list",
    list_print, // print
    NULL, // call_n
    NULL, // unary_op
    list_binary_op, // binary_op
    list_getiter, // getiter
    NULL, // iternext
    { // method list
        { "append", &list_append_obj },
        { "pop", &list_pop_obj },
        { "sort", &list_sort_obj },
        { NULL, NULL }, // end-of-list sentinel
    },
};

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 = {
    { &mp_const_type },
    "list_iterator",
    NULL, // print
    NULL, // call_n
    NULL, // unary_op
    NULL, // binary_op
    NULL, // getiter
    list_it_iternext, // iternext
    { { NULL, NULL }, }, // method list
};

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;
}