kopia lustrzana https://github.com/micropython/micropython
177 wiersze
4.8 KiB
C
177 wiersze
4.8 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <assert.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "mpqstr.h"
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#include "obj.h"
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#include "runtime0.h"
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#include "runtime.h"
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typedef struct _mp_obj_tuple_t {
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mp_obj_base_t base;
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machine_uint_t len;
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mp_obj_t items[];
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} mp_obj_tuple_t;
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static mp_obj_t mp_obj_new_tuple_iterator(mp_obj_tuple_t *tuple, int cur);
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/******************************************************************************/
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/* tuple */
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static void tuple_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
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mp_obj_tuple_t *o = o_in;
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print(env, "(");
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for (int i = 0; i < o->len; i++) {
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if (i > 0) {
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print(env, ", ");
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}
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mp_obj_print_helper(print, env, o->items[i]);
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}
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if (o->len == 1) {
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print(env, ",");
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}
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print(env, ")");
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}
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// args are in reverse order in the array
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static mp_obj_t tuple_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
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switch (n_args) {
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case 0:
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// return a empty tuple
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return mp_const_empty_tuple;
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case 1:
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{
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// 1 argument, an iterable from which we make a new tuple
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if (MP_OBJ_IS_TYPE(args[0], &tuple_type)) {
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return args[0];
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}
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// TODO optimise for cases where we know the length of the iterator
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uint alloc = 4;
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uint len = 0;
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mp_obj_t *items = m_new(mp_obj_t, alloc);
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mp_obj_t iterable = rt_getiter(args[0]);
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mp_obj_t item;
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while ((item = rt_iternext(iterable)) != mp_const_stop_iteration) {
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if (len >= alloc) {
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items = m_renew(mp_obj_t, items, alloc, alloc * 2);
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alloc *= 2;
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}
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items[len++] = item;
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}
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mp_obj_t tuple = mp_obj_new_tuple(len, items);
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m_free(items, alloc);
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return tuple;
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}
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default:
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nlr_jump(mp_obj_new_exception_msg_1_arg(MP_QSTR_TypeError, "tuple takes at most 1 argument, %d given", (void*)(machine_int_t)n_args));
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}
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}
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static mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
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mp_obj_tuple_t *o = lhs;
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switch (op) {
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case RT_BINARY_OP_SUBSCR:
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{
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// tuple load
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uint index = mp_get_index(o->base.type, o->len, rhs);
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return o->items[index];
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}
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default:
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// op not supported
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return NULL;
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}
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}
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static mp_obj_t tuple_getiter(mp_obj_t o_in) {
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return mp_obj_new_tuple_iterator(o_in, 0);
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}
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const mp_obj_type_t tuple_type = {
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{ &mp_const_type },
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"tuple",
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.print = tuple_print,
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.make_new = tuple_make_new,
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.binary_op = tuple_binary_op,
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.getiter = tuple_getiter,
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};
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// the zero-length tuple
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static const mp_obj_tuple_t empty_tuple_obj = {{&tuple_type}, 0};
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const mp_obj_t mp_const_empty_tuple = (mp_obj_t)&empty_tuple_obj;
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mp_obj_t mp_obj_new_tuple(uint n, const mp_obj_t *items) {
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if (n == 0) {
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return mp_const_empty_tuple;
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}
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mp_obj_tuple_t *o = m_new_obj_var(mp_obj_tuple_t, mp_obj_t, n);
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o->base.type = &tuple_type;
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o->len = n;
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for (int i = 0; i < n; i++) {
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o->items[i] = items[i];
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}
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return o;
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}
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mp_obj_t mp_obj_new_tuple_reverse(uint n, const mp_obj_t *items) {
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if (n == 0) {
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return mp_const_empty_tuple;
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}
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mp_obj_tuple_t *o = m_new_obj_var(mp_obj_tuple_t, mp_obj_t, n);
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o->base.type = &tuple_type;
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o->len = n;
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for (int i = 0; i < n; i++) {
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o->items[i] = items[n - i - 1];
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}
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return o;
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}
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void mp_obj_tuple_get(mp_obj_t self_in, uint *len, mp_obj_t **items) {
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mp_obj_tuple_t *self = self_in;
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*len = self->len;
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*items = &self->items[0];
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}
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/******************************************************************************/
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/* tuple iterator */
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typedef struct _mp_obj_tuple_it_t {
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mp_obj_base_t base;
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mp_obj_tuple_t *tuple;
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machine_uint_t cur;
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} mp_obj_tuple_it_t;
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static mp_obj_t tuple_it_iternext(mp_obj_t self_in) {
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mp_obj_tuple_it_t *self = self_in;
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if (self->cur < self->tuple->len) {
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mp_obj_t o_out = self->tuple->items[self->cur];
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self->cur += 1;
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return o_out;
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} else {
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return mp_const_stop_iteration;
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}
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}
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static const mp_obj_type_t tuple_it_type = {
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{ &mp_const_type },
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"tuple_iterator",
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.iternext = tuple_it_iternext,
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};
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static mp_obj_t mp_obj_new_tuple_iterator(mp_obj_tuple_t *tuple, int cur) {
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mp_obj_tuple_it_t *o = m_new_obj(mp_obj_tuple_it_t);
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o->base.type = &tuple_it_type;
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o->tuple = tuple;
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o->cur = cur;
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return o;
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}
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