60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
#include <stdlib.h>
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#include <assert.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "runtime.h"
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typedef struct _mp_obj_zip_t {
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mp_obj_base_t base;
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int n_iters;
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mp_obj_t iters[];
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} mp_obj_zip_t;
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static mp_obj_t zip_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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// TODO check n_kw == 0
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mp_obj_zip_t *o = m_new_obj_var(mp_obj_zip_t, mp_obj_t, n_args);
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o->base.type = &zip_type;
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o->n_iters = n_args;
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for (int i = 0; i < n_args; i++) {
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o->iters[i] = rt_getiter(args[i]);
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}
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return o;
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}
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static mp_obj_t zip_getiter(mp_obj_t self_in) {
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return self_in;
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}
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static mp_obj_t zip_iternext(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &zip_type));
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mp_obj_zip_t *self = self_in;
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mp_obj_t *items;
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if (self->n_iters == 0) {
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return mp_const_stop_iteration;
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}
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mp_obj_t o = mp_obj_new_tuple(self->n_iters, NULL);
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mp_obj_tuple_get(o, NULL, &items);
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for (int i = 0; i < self->n_iters; i++) {
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mp_obj_t next = rt_iternext(self->iters[i]);
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if (next == mp_const_stop_iteration) {
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mp_obj_tuple_del(o);
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return mp_const_stop_iteration;
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}
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items[i] = next;
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}
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return o;
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}
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const mp_obj_type_t zip_type = {
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{ &mp_const_type },
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"zip",
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.make_new = zip_make_new,
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.getiter = zip_getiter,
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.iternext = zip_iternext,
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};
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