kopia lustrzana https://github.com/micropython/micropython
102 wiersze
3.3 KiB
C
102 wiersze
3.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <assert.h>
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#include "py/obj.h"
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/******************************************************************************/
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/* slice object */
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#if MICROPY_PY_BUILTINS_SLICE
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// TODO: This implements only variant of slice with 2 integer args only.
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// CPython supports 3rd arg (step), plus args can be arbitrary Python objects.
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typedef struct _mp_obj_slice_t {
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mp_obj_base_t base;
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mp_obj_t start;
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mp_obj_t stop;
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mp_obj_t step;
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} mp_obj_slice_t;
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STATIC void slice_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_slice_t *o = MP_OBJ_TO_PTR(o_in);
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mp_print_str(print, "slice(");
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mp_obj_print_helper(print, o->start, PRINT_REPR);
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mp_print_str(print, ", ");
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mp_obj_print_helper(print, o->stop, PRINT_REPR);
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mp_print_str(print, ", ");
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mp_obj_print_helper(print, o->step, PRINT_REPR);
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mp_print_str(print, ")");
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}
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#if MICROPY_PY_BUILTINS_SLICE_ATTRS
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STATIC void slice_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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if (dest[0] != MP_OBJ_NULL) {
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// not load attribute
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return;
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}
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mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
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if (attr == MP_QSTR_start) {
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dest[0] = self->start;
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} else if (attr == MP_QSTR_stop) {
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dest[0] = self->stop;
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} else if (attr == MP_QSTR_step) {
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dest[0] = self->step;
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}
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}
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#endif
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const mp_obj_type_t mp_type_slice = {
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{ &mp_type_type },
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.name = MP_QSTR_slice,
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.print = slice_print,
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#if MICROPY_PY_BUILTINS_SLICE_ATTRS
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.attr = slice_attr,
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#endif
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};
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mp_obj_t mp_obj_new_slice(mp_obj_t ostart, mp_obj_t ostop, mp_obj_t ostep) {
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mp_obj_slice_t *o = m_new_obj(mp_obj_slice_t);
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o->base.type = &mp_type_slice;
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o->start = ostart;
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o->stop = ostop;
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o->step = ostep;
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return MP_OBJ_FROM_PTR(o);
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}
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void mp_obj_slice_get(mp_obj_t self_in, mp_obj_t *start, mp_obj_t *stop, mp_obj_t *step) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_slice));
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mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
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*start = self->start;
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*stop = self->stop;
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*step = self->step;
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}
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#endif
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