circuitpython/py/objenumerate.c

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#include <stdlib.h>
#include <assert.h>
#include "misc.h"
#include "mpconfig.h"
#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_getiter(mp_obj_t self_in) {
return self_in;
}
static mp_obj_t enumerate_iternext(mp_obj_t self_in);
/* 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 = &enumerate_type;
o->iter = rt_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 enumerate_type = {
{ &mp_const_type },
"enumerate",
.make_new = enumerate_make_new,
.iternext = enumerate_iternext,
.getiter = enumerate_getiter,
};
static mp_obj_t enumerate_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &enumerate_type));
mp_obj_enumerate_t *self = self_in;
mp_obj_t next = rt_iternext(self->iter);
if (next == mp_const_stop_iteration) {
return mp_const_stop_iteration;
} else {
mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
return mp_obj_new_tuple(2, items);
}
}