54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
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#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 "obj.h"
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#include "runtime.h"
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typedef struct _mp_obj_enumerate_t {
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mp_obj_base_t base;
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mp_obj_t iter;
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machine_int_t cur;
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} mp_obj_enumerate_t;
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static mp_obj_t enumerate_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 enumerate_iternext(mp_obj_t self_in);
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/* TODO: enumerate is one of the ones that can take args or kwargs.
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Sticking to args for now */
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static mp_obj_t enumerate_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
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/* NOTE: args are backwards */
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assert(n_args > 0);
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args += n_args - 1;
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mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);
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o->base.type = &enumerate_type;
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o->iter = rt_getiter(args[0]);
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o->cur = n_args > 1 ? mp_obj_get_int(args[-1]) : 0;
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return o;
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}
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const mp_obj_type_t enumerate_type = {
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{ &mp_const_type },
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"enumerate",
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.make_new = enumerate_make_new,
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.iternext = enumerate_iternext,
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.getiter = enumerate_getiter,
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};
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static mp_obj_t enumerate_iternext(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &enumerate_type));
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mp_obj_enumerate_t *self = self_in;
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mp_obj_t next = rt_iternext(self->iter);
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if (next == mp_const_stop_iteration) {
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return mp_const_stop_iteration;
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} else {
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mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
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return mp_obj_new_tuple(2, items);
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}
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}
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