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824f83fd20
circuitpython/py/objlist.c
Damien George 8212d97317 py: Use polymorphic iterator type where possible to reduce code size. 
Only types whose iterator instances still fit in 4 machine words have
been changed to use the polymorphic iterator.

Reduces Thumb2 arch code size by 264 bytes.
2016-01-03 16:27:55 +00:00

526 lines
19 KiB
C
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/*
* 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.
*/
#include <string.h>
#include <assert.h>
#include "py/nlr.h"
#include "py/objlist.h"
#include "py/runtime0.h"
#include "py/runtime.h"
#include "py/stackctrl.h"
STATIC mp_obj_t mp_obj_new_list_iterator(mp_obj_t list, mp_uint_t cur);
STATIC mp_obj_list_t *list_new(mp_uint_t n);
STATIC mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in);
STATIC mp_obj_t list_pop(mp_uint_t n_args, const mp_obj_t *args);
// TODO: Move to mpconfig.h
#define LIST_MIN_ALLOC 4
/******************************************************************************/
/* list */
STATIC void list_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_list_t *o = MP_OBJ_TO_PTR(o_in);
if (!(MICROPY_PY_UJSON && kind == PRINT_JSON)) {
kind = PRINT_REPR;
}
mp_print_str(print, "[");
for (mp_uint_t i = 0; i < o->len; i++) {
if (i > 0) {
mp_print_str(print, ", ");
}
mp_obj_print_helper(print, o->items[i], kind);
}
mp_print_str(print, "]");
}
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;
while ((item = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_list_append(list, item);
}
return list;
}
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) {
(void)type_in;
mp_arg_check_num(n_args, n_kw, 0, 1, false);
switch (n_args) {
case 0:
// return a new, empty list
return mp_obj_new_list(0, NULL);
case 1:
default: {
// make list from iterable
// TODO: optimize list/tuple
mp_obj_t list = mp_obj_new_list(0, NULL);
return list_extend_from_iter(list, args[0]);
}
}
}
// Don't pass MP_BINARY_OP_NOT_EQUAL here
STATIC bool list_cmp_helper(mp_uint_t op, mp_obj_t self_in, mp_obj_t another_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
if (!MP_OBJ_IS_TYPE(another_in, &mp_type_list)) {
return false;
}
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_list_t *another = MP_OBJ_TO_PTR(another_in);
return mp_seq_cmp_objs(op, self->items, self->len, another->items, another->len);
}
STATIC mp_obj_t list_unary_op(mp_uint_t op, mp_obj_t self_in) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
switch (op) {
case MP_UNARY_OP_BOOL: return mp_obj_new_bool(self->len != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
default: return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_obj_t list_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs) {
mp_obj_list_t *o = MP_OBJ_TO_PTR(lhs);
switch (op) {
case MP_BINARY_OP_ADD: {
if (!MP_OBJ_IS_TYPE(rhs, &mp_type_list)) {
return MP_OBJ_NULL; // op not supported
}
mp_obj_list_t *p = MP_OBJ_TO_PTR(rhs);
mp_obj_list_t *s = list_new(o->len + p->len);
mp_seq_cat(s->items, o->items, o->len, p->items, p->len, mp_obj_t);
return MP_OBJ_FROM_PTR(s);
}
case MP_BINARY_OP_INPLACE_ADD: {
list_extend(lhs, rhs);
return lhs;
}
case MP_BINARY_OP_MULTIPLY: {
mp_int_t n;
if (!mp_obj_get_int_maybe(rhs, &n)) {
return MP_OBJ_NULL; // op not supported
}
if (n < 0) {
n = 0;
}
mp_obj_list_t *s = list_new(o->len * n);
mp_seq_multiply(o->items, sizeof(*o->items), o->len, n, s->items);
return MP_OBJ_FROM_PTR(s);
}
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:
return mp_obj_new_bool(list_cmp_helper(op, lhs, rhs));
default:
return MP_OBJ_NULL; // op not supported
}
}
STATIC mp_obj_t list_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
if (value == MP_OBJ_NULL) {
// delete
#if MICROPY_PY_BUILTINS_SLICE
if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
mp_bound_slice_t slice;
if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice)) {
assert(0);
}
mp_int_t len_adj = slice.start - slice.stop;
//printf("Len adj: %d\n", len_adj);
assert(len_adj <= 0);
mp_seq_replace_slice_no_grow(self->items, self->len, slice.start, slice.stop, self->items/*NULL*/, 0, sizeof(*self->items));
// 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
mp_obj_t args[2] = {self_in, index};
list_pop(2, args);
return mp_const_none;
} else if (value == MP_OBJ_SENTINEL) {
// load
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
#if MICROPY_PY_BUILTINS_SLICE
if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
mp_bound_slice_t slice;
if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice)) {
return mp_seq_extract_slice(self->len, self->items, &slice);
}
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);
return MP_OBJ_FROM_PTR(res);
}
#endif
mp_uint_t index_val = mp_get_index(self->base.type, self->len, index, false);
return self->items[index_val];
} else {
#if MICROPY_PY_BUILTINS_SLICE
if (MP_OBJ_IS_TYPE(index, &mp_type_slice)) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
assert(MP_OBJ_IS_TYPE(value, &mp_type_list));
mp_obj_list_t *slice = MP_OBJ_TO_PTR(value);
mp_bound_slice_t slice_out;
if (!mp_seq_get_fast_slice_indexes(self->len, index, &slice_out)) {
assert(0);
}
mp_int_t len_adj = slice->len - (slice_out.stop - slice_out.start);
//printf("Len adj: %d\n", len_adj);
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;
}
mp_seq_replace_slice_grow_inplace(self->items, self->len,
slice_out.start, slice_out.stop, slice->items, slice->len, len_adj, sizeof(*self->items));
} else {
mp_seq_replace_slice_no_grow(self->items, self->len,
slice_out.start, slice_out.stop, slice->items, slice->len, sizeof(*self->items));
// 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
}
self->len += len_adj;
return mp_const_none;
}
#endif
mp_obj_list_store(self_in, index, value);
return mp_const_none;
}
}
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, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
if (self->len >= self->alloc) {
self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc * 2);
self->alloc *= 2;
mp_seq_clear(self->items, self->len + 1, self->alloc, sizeof(*self->items));
}
self->items[self->len++] = arg;
return mp_const_none; // return None, as per CPython
}
STATIC mp_obj_t list_extend(mp_obj_t self_in, mp_obj_t arg_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
if (MP_OBJ_IS_TYPE(arg_in, &mp_type_list)) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_list_t *arg = MP_OBJ_TO_PTR(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;
mp_seq_clear(self->items, self->len + arg->len, self->alloc, sizeof(*self->items));
}
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);
}
return mp_const_none; // return None, as per CPython
}
STATIC mp_obj_t list_pop(mp_uint_t n_args, const mp_obj_t *args) {
assert(1 <= n_args && n_args <= 2);
assert(MP_OBJ_IS_TYPE(args[0], &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(args[0]);
if (self->len == 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_IndexError, "pop from empty list"));
}
mp_uint_t index = mp_get_index(self->base.type, self->len, n_args == 1 ? MP_OBJ_NEW_SMALL_INT(-1) : args[1], false);
mp_obj_t ret = self->items[index];
self->len -= 1;
memmove(self->items + index, self->items + index + 1, (self->len - index) * sizeof(mp_obj_t));
// Clear stale pointer from slot which just got freed to prevent GC issues
self->items[self->len] = MP_OBJ_NULL;
if (self->alloc > LIST_MIN_ALLOC && self->alloc > 2 * self->len) {
self->items = m_renew(mp_obj_t, self->items, self->alloc, self->alloc/2);
self->alloc /= 2;
}
return ret;
}
STATIC void mp_quicksort(mp_obj_t *head, mp_obj_t *tail, mp_obj_t key_fn, mp_obj_t binop_less_result) {
MP_STACK_CHECK();
while (head < tail) {
mp_obj_t *h = head - 1;
mp_obj_t *t = tail;
mp_obj_t v = key_fn == MP_OBJ_NULL ? tail[0] : mp_call_function_1(key_fn, tail[0]); // get pivot using key_fn
for (;;) {
do ++h; while (h < t && mp_binary_op(MP_BINARY_OP_LESS, key_fn == MP_OBJ_NULL ? h[0] : mp_call_function_1(key_fn, h[0]), v) == binop_less_result);
do --t; while (h < t && mp_binary_op(MP_BINARY_OP_LESS, v, key_fn == MP_OBJ_NULL ? t[0] : mp_call_function_1(key_fn, t[0])) == binop_less_result);
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;
// do the smaller recursive call first, to keep stack within O(log(N))
if (t - head < tail - h - 1) {
mp_quicksort(head, t, key_fn, binop_less_result);
head = h + 1;
} else {
mp_quicksort(h + 1, tail, key_fn, binop_less_result);
tail = t;
}
}
}
// TODO Python defines sort to be stable but ours is not
mp_obj_t mp_obj_list_sort(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) {
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_key, MP_ARG_KW_ONLY | MP_ARG_OBJ, {.u_rom_obj = MP_ROM_PTR(&mp_const_none_obj)} },
{ MP_QSTR_reverse, MP_ARG_KW_ONLY | MP_ARG_BOOL, {.u_bool = false} },
};
// parse args
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
assert(MP_OBJ_IS_TYPE(pos_args[0], &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(pos_args[0]);
if (self->len > 1) {
mp_quicksort(self->items, self->items + self->len - 1,
args[0].u_obj == mp_const_none ? MP_OBJ_NULL : args[0].u_obj,
args[1].u_bool ? mp_const_false : mp_const_true);
}
return mp_const_none;
}
STATIC mp_obj_t list_clear(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
self->len = 0;
self->items = m_renew(mp_obj_t, self->items, self->alloc, LIST_MIN_ALLOC);
self->alloc = LIST_MIN_ALLOC;
mp_seq_clear(self->items, 0, self->alloc, sizeof(*self->items));
return mp_const_none;
}
STATIC mp_obj_t list_copy(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
return mp_obj_new_list(self->len, self->items);
}
STATIC mp_obj_t list_count(mp_obj_t self_in, mp_obj_t value) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
return mp_seq_count_obj(self->items, self->len, value);
}
STATIC mp_obj_t list_index(mp_uint_t n_args, const mp_obj_t *args) {
assert(2 <= n_args && n_args <= 4);
assert(MP_OBJ_IS_TYPE(args[0], &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(args[0]);
return mp_seq_index_obj(self->items, self->len, n_args, args);
}
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, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
// insert has its own strange index logic
mp_int_t index = MP_OBJ_SMALL_INT_VALUE(idx);
if (index < 0) {
index += self->len;
}
if (index < 0) {
index = 0;
}
if ((mp_uint_t)index > self->len) {
index = self->len;
}
mp_obj_list_append(self_in, mp_const_none);
for (mp_int_t i = self->len-1; i > index; i--) {
self->items[i] = self->items[i-1];
}
self->items[index] = obj;
return mp_const_none;
}
mp_obj_t mp_obj_list_remove(mp_obj_t self_in, mp_obj_t value) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
mp_obj_t args[] = {self_in, value};
args[1] = list_index(2, args);
list_pop(2, args);
return mp_const_none;
}
STATIC mp_obj_t list_reverse(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_list));
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
mp_int_t len = self->len;
for (mp_int_t 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;
}
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, mp_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, 1, mp_obj_list_sort);
STATIC const mp_rom_map_elem_t list_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_append), MP_ROM_PTR(&list_append_obj) },
{ MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&list_clear_obj) },
{ MP_ROM_QSTR(MP_QSTR_copy), MP_ROM_PTR(&list_copy_obj) },
{ MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&list_count_obj) },
{ MP_ROM_QSTR(MP_QSTR_extend), MP_ROM_PTR(&list_extend_obj) },
{ MP_ROM_QSTR(MP_QSTR_index), MP_ROM_PTR(&list_index_obj) },
{ MP_ROM_QSTR(MP_QSTR_insert), MP_ROM_PTR(&list_insert_obj) },
{ MP_ROM_QSTR(MP_QSTR_pop), MP_ROM_PTR(&list_pop_obj) },
{ MP_ROM_QSTR(MP_QSTR_remove), MP_ROM_PTR(&list_remove_obj) },
{ MP_ROM_QSTR(MP_QSTR_reverse), MP_ROM_PTR(&list_reverse_obj) },
{ MP_ROM_QSTR(MP_QSTR_sort), MP_ROM_PTR(&list_sort_obj) },
};
STATIC MP_DEFINE_CONST_DICT(list_locals_dict, list_locals_dict_table);
const mp_obj_type_t mp_type_list = {
{ &mp_type_type },
.name = MP_QSTR_list,
.print = list_print,
.make_new = list_make_new,
.unary_op = list_unary_op,
.binary_op = list_binary_op,
.subscr = list_subscr,
.getiter = list_getiter,
.locals_dict = (mp_obj_dict_t*)&list_locals_dict,
};
void mp_obj_list_init(mp_obj_list_t *o, mp_uint_t n) {
o->base.type = &mp_type_list;
o->alloc = n < LIST_MIN_ALLOC ? LIST_MIN_ALLOC : n;
o->len = n;
o->items = m_new(mp_obj_t, o->alloc);
mp_seq_clear(o->items, n, o->alloc, sizeof(*o->items));
}
STATIC mp_obj_list_t *list_new(mp_uint_t n) {
mp_obj_list_t *o = m_new_obj(mp_obj_list_t);
mp_obj_list_init(o, n);
return o;
}
mp_obj_t mp_obj_new_list(mp_uint_t n, mp_obj_t *items) {
mp_obj_list_t *o = list_new(n);
if (items != NULL) {
for (mp_uint_t i = 0; i < n; i++) {
o->items[i] = items[i];
}
}
return MP_OBJ_FROM_PTR(o);
}
void mp_obj_list_get(mp_obj_t self_in, mp_uint_t *len, mp_obj_t **items) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
*len = self->len;
*items = self->items;
}
void mp_obj_list_set_len(mp_obj_t self_in, mp_uint_t len) {
// trust that the caller knows what it's doing
// TODO realloc if len got much smaller than alloc
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
self->len = len;
}
void mp_obj_list_store(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
mp_obj_list_t *self = MP_OBJ_TO_PTR(self_in);
mp_uint_t i = mp_get_index(self->base.type, self->len, index, false);
self->items[i] = value;
}
/******************************************************************************/
/* list iterator */
typedef struct _mp_obj_list_it_t {
mp_obj_base_t base;
mp_fun_1_t iternext;
mp_obj_t list;
mp_uint_t cur;
} mp_obj_list_it_t;
STATIC mp_obj_t list_it_iternext(mp_obj_t self_in) {
mp_obj_list_it_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_list_t *list = MP_OBJ_TO_PTR(self->list);
if (self->cur < list->len) {
mp_obj_t o_out = list->items[self->cur];
self->cur += 1;
return o_out;
} else {
return MP_OBJ_STOP_ITERATION;
}
}
mp_obj_t mp_obj_new_list_iterator(mp_obj_t list, mp_uint_t cur) {
mp_obj_list_it_t *o = m_new_obj(mp_obj_list_it_t);
o->base.type = &mp_type_polymorph_iter;
o->iternext = list_it_iternext;
o->list = list;
o->cur = cur;
return MP_OBJ_FROM_PTR(o);
}
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