micropython/py/objrange.c

117 lines
3.6 KiB
C

/*
* This file is part of the Micro Python 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 "mpconfig.h"
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
/******************************************************************************/
/* range iterator */
typedef struct _mp_obj_range_it_t {
mp_obj_base_t base;
// TODO make these values generic objects or something
machine_int_t cur;
machine_int_t stop;
machine_int_t step;
} mp_obj_range_it_t;
STATIC mp_obj_t range_it_iternext(mp_obj_t o_in) {
mp_obj_range_it_t *o = o_in;
if ((o->step > 0 && o->cur < o->stop) || (o->step < 0 && o->cur > o->stop)) {
mp_obj_t o_out = MP_OBJ_NEW_SMALL_INT(o->cur);
o->cur += o->step;
return o_out;
} else {
return MP_OBJ_STOP_ITERATION;
}
}
STATIC const mp_obj_type_t range_it_type = {
{ &mp_type_type },
.name = MP_QSTR_iterator,
.getiter = mp_identity,
.iternext = range_it_iternext,
};
mp_obj_t mp_obj_new_range_iterator(int cur, int stop, int step) {
mp_obj_range_it_t *o = m_new_obj(mp_obj_range_it_t);
o->base.type = &range_it_type;
o->cur = cur;
o->stop = stop;
o->step = step;
return o;
}
/******************************************************************************/
/* range */
typedef struct _mp_obj_range_t {
mp_obj_base_t base;
// TODO make these values generic objects or something
machine_int_t start;
machine_int_t stop;
machine_int_t step;
} mp_obj_range_t;
STATIC mp_obj_t range_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 3, false);
mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
o->base.type = &mp_type_range;
o->start = 0;
o->step = 1;
if (n_args == 1) {
o->stop = mp_obj_get_int(args[0]);
} else {
o->start = mp_obj_get_int(args[0]);
o->stop = mp_obj_get_int(args[1]);
if (n_args == 3) {
o->step = mp_obj_get_int(args[2]);
}
}
return o;
}
STATIC mp_obj_t range_getiter(mp_obj_t o_in) {
mp_obj_range_t *o = o_in;
return mp_obj_new_range_iterator(o->start, o->stop, o->step);
}
const mp_obj_type_t mp_type_range = {
{ &mp_type_type },
.name = MP_QSTR_range,
.make_new = range_make_new,
.getiter = range_getiter,
};