Colin Hogben / micropython

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Dependents:   micropython-repl

py/objslice.c@0:5868e8752d44, 2016-04-16 (annotated)

Committer:
pythontech
Date:
Sat Apr 16 17:11:56 2016 +0000
Revision:
0:5868e8752d44
Split off library from repl

Who changed what in which revision?

UserRevisionLine numberNew contents of line
pythontech 0:5868e8752d44 1 /*
pythontech 0:5868e8752d44 2 * This file is part of the Micro Python project, http://micropython.org/
pythontech 0:5868e8752d44 3 *
pythontech 0:5868e8752d44 4 * The MIT License (MIT)
pythontech 0:5868e8752d44 5 *
pythontech 0:5868e8752d44 6 * Copyright (c) 2013, 2014 Damien P. George
pythontech 0:5868e8752d44 7 *
pythontech 0:5868e8752d44 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
pythontech 0:5868e8752d44 9 * of this software and associated documentation files (the "Software"), to deal
pythontech 0:5868e8752d44 10 * in the Software without restriction, including without limitation the rights
pythontech 0:5868e8752d44 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
pythontech 0:5868e8752d44 12 * copies of the Software, and to permit persons to whom the Software is
pythontech 0:5868e8752d44 13 * furnished to do so, subject to the following conditions:
pythontech 0:5868e8752d44 14 *
pythontech 0:5868e8752d44 15 * The above copyright notice and this permission notice shall be included in
pythontech 0:5868e8752d44 16 * all copies or substantial portions of the Software.
pythontech 0:5868e8752d44 17 *
pythontech 0:5868e8752d44 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
pythontech 0:5868e8752d44 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
pythontech 0:5868e8752d44 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
pythontech 0:5868e8752d44 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
pythontech 0:5868e8752d44 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
pythontech 0:5868e8752d44 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
pythontech 0:5868e8752d44 24 * THE SOFTWARE.
pythontech 0:5868e8752d44 25 */
pythontech 0:5868e8752d44 26
pythontech 0:5868e8752d44 27 #include <stdlib.h>
pythontech 0:5868e8752d44 28 #include <assert.h>
pythontech 0:5868e8752d44 29
pythontech 0:5868e8752d44 30 #include "py/nlr.h"
pythontech 0:5868e8752d44 31 #include "py/obj.h"
pythontech 0:5868e8752d44 32 #include "py/runtime0.h"
pythontech 0:5868e8752d44 33
pythontech 0:5868e8752d44 34 /******************************************************************************/
pythontech 0:5868e8752d44 35 /* slice object */
pythontech 0:5868e8752d44 36
pythontech 0:5868e8752d44 37 #if MICROPY_PY_BUILTINS_SLICE
pythontech 0:5868e8752d44 38
pythontech 0:5868e8752d44 39 // TODO: This implements only variant of slice with 2 integer args only.
pythontech 0:5868e8752d44 40 // CPython supports 3rd arg (step), plus args can be arbitrary Python objects.
pythontech 0:5868e8752d44 41 typedef struct _mp_obj_slice_t {
pythontech 0:5868e8752d44 42 mp_obj_base_t base;
pythontech 0:5868e8752d44 43 mp_obj_t start;
pythontech 0:5868e8752d44 44 mp_obj_t stop;
pythontech 0:5868e8752d44 45 mp_obj_t step;
pythontech 0:5868e8752d44 46 } mp_obj_slice_t;
pythontech 0:5868e8752d44 47
pythontech 0:5868e8752d44 48 STATIC void slice_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
pythontech 0:5868e8752d44 49 (void)kind;
pythontech 0:5868e8752d44 50 mp_obj_slice_t *o = MP_OBJ_TO_PTR(o_in);
pythontech 0:5868e8752d44 51 mp_print_str(print, "slice(");
pythontech 0:5868e8752d44 52 mp_obj_print_helper(print, o->start, PRINT_REPR);
pythontech 0:5868e8752d44 53 mp_print_str(print, ", ");
pythontech 0:5868e8752d44 54 mp_obj_print_helper(print, o->stop, PRINT_REPR);
pythontech 0:5868e8752d44 55 mp_print_str(print, ", ");
pythontech 0:5868e8752d44 56 mp_obj_print_helper(print, o->step, PRINT_REPR);
pythontech 0:5868e8752d44 57 mp_print_str(print, ")");
pythontech 0:5868e8752d44 58 }
pythontech 0:5868e8752d44 59
pythontech 0:5868e8752d44 60 #if MICROPY_PY_BUILTINS_SLICE_ATTRS
pythontech 0:5868e8752d44 61 STATIC void slice_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
pythontech 0:5868e8752d44 62 if (dest[0] != MP_OBJ_NULL) {
pythontech 0:5868e8752d44 63 // not load attribute
pythontech 0:5868e8752d44 64 return;
pythontech 0:5868e8752d44 65 }
pythontech 0:5868e8752d44 66 mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 67 if (attr == MP_QSTR_start) {
pythontech 0:5868e8752d44 68 dest[0] = self->start;
pythontech 0:5868e8752d44 69 } else if (attr == MP_QSTR_stop) {
pythontech 0:5868e8752d44 70 dest[0] = self->stop;
pythontech 0:5868e8752d44 71 } else if (attr == MP_QSTR_step) {
pythontech 0:5868e8752d44 72 dest[0] = self->step;
pythontech 0:5868e8752d44 73 }
pythontech 0:5868e8752d44 74 }
pythontech 0:5868e8752d44 75 #endif
pythontech 0:5868e8752d44 76
pythontech 0:5868e8752d44 77 const mp_obj_type_t mp_type_slice = {
pythontech 0:5868e8752d44 78 { &mp_type_type },
pythontech 0:5868e8752d44 79 .name = MP_QSTR_slice,
pythontech 0:5868e8752d44 80 .print = slice_print,
pythontech 0:5868e8752d44 81 #if MICROPY_PY_BUILTINS_SLICE_ATTRS
pythontech 0:5868e8752d44 82 .attr = slice_attr,
pythontech 0:5868e8752d44 83 #endif
pythontech 0:5868e8752d44 84 };
pythontech 0:5868e8752d44 85
pythontech 0:5868e8752d44 86 mp_obj_t mp_obj_new_slice(mp_obj_t ostart, mp_obj_t ostop, mp_obj_t ostep) {
pythontech 0:5868e8752d44 87 mp_obj_slice_t *o = m_new_obj(mp_obj_slice_t);
pythontech 0:5868e8752d44 88 o->base.type = &mp_type_slice;
pythontech 0:5868e8752d44 89 o->start = ostart;
pythontech 0:5868e8752d44 90 o->stop = ostop;
pythontech 0:5868e8752d44 91 o->step = ostep;
pythontech 0:5868e8752d44 92 return MP_OBJ_FROM_PTR(o);
pythontech 0:5868e8752d44 93 }
pythontech 0:5868e8752d44 94
pythontech 0:5868e8752d44 95 void mp_obj_slice_get(mp_obj_t self_in, mp_obj_t *start, mp_obj_t *stop, mp_obj_t *step) {
pythontech 0:5868e8752d44 96 assert(MP_OBJ_IS_TYPE(self_in, &mp_type_slice));
pythontech 0:5868e8752d44 97 mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
pythontech 0:5868e8752d44 98 *start = self->start;
pythontech 0:5868e8752d44 99 *stop = self->stop;
pythontech 0:5868e8752d44 100 *step = self->step;
pythontech 0:5868e8752d44 101 }
pythontech 0:5868e8752d44 102
pythontech 0:5868e8752d44 103 #endif