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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdlib.h>
#include <assert.h>
#include "py/runtime.h"
#if MICROPY_PY_BUILTINS_ENUMERATE
typedef struct _mp_obj_enumerate_t {
mp_obj_base_t base;
mp_obj_t iter;
mp_int_t cur;
} mp_obj_enumerate_t;
STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in);
STATIC mp_obj_t enumerate_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
#if MICROPY_CPYTHON_COMPAT
static const mp_arg_t allowed_args[] = {
{ MP_QSTR_iterable, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
{ MP_QSTR_start, MP_ARG_INT, {.u_int = 0} },
};
// parse args
struct {
mp_arg_val_t iterable, start;
} arg_vals;
mp_arg_parse_all_kw_array(n_args, n_kw, args,
MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t *)&arg_vals);
// create enumerate object
mp_obj_enumerate_t *o = mp_obj_malloc(mp_obj_enumerate_t, type);
o->iter = mp_getiter(arg_vals.iterable.u_obj, NULL);
o->cur = arg_vals.start.u_int;
#else
mp_arg_check_num(n_args, n_kw, 1, 2, false);
mp_obj_enumerate_t *o = mp_obj_malloc(mp_obj_enumerate_t, type);
o->iter = mp_getiter(args[0], NULL);
o->cur = n_args > 1 ? mp_obj_get_int(args[1]) : 0;
#endif
return MP_OBJ_FROM_PTR(o);
}
const mp_obj_type_t mp_type_enumerate = {
{ &mp_type_type },
.name = MP_QSTR_enumerate,
.make_new = enumerate_make_new,
.iternext = enumerate_iternext,
.getiter = mp_identity_getiter,
};
STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in) {
assert(mp_obj_is_type(self_in, &mp_type_enumerate));
mp_obj_enumerate_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_t next = mp_iternext(self->iter);
if (next == MP_OBJ_STOP_ITERATION) {
return MP_OBJ_STOP_ITERATION;
} else {
mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
return mp_obj_new_tuple(2, items);
}
}
#endif // MICROPY_PY_BUILTINS_ENUMERATE
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