circuitpython/py/objenumerate.c

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#include <stdlib.h>
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#include <assert.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
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#include "obj.h"
#include "runtime.h"
typedef struct _mp_obj_enumerate_t {
mp_obj_base_t base;
mp_obj_t iter;
machine_int_t cur;
} mp_obj_enumerate_t;
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.
Sticking to args for now */
STATIC mp_obj_t enumerate_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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assert(n_args > 0);
mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);
o->base.type = &mp_type_enumerate;
o->iter = mp_getiter(args[0]);
o->cur = n_args > 1 ? mp_obj_get_int(args[1]) : 0;
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return o;
}
const mp_obj_type_t mp_type_enumerate = {
{ &mp_type_type },
.name = MP_QSTR_enumerate,
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.make_new = enumerate_make_new,
.iternext = enumerate_iternext,
.getiter = mp_identity,
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};
STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_enumerate));
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mp_obj_enumerate_t *self = self_in;
mp_obj_t next = mp_iternext(self->iter);
if (next == MP_OBJ_STOP_ITERATION) {
return MP_OBJ_STOP_ITERATION;
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} else {
mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
return mp_obj_new_tuple(2, items);
}
}