eee1e8841a
These macros could in principle be (inline) functions so it makes sense to have them lower case, to match the other C API functions. The remaining macros that are upper case are: - MP_OBJ_TO_PTR, MP_OBJ_FROM_PTR - MP_OBJ_NEW_SMALL_INT, MP_OBJ_SMALL_INT_VALUE - MP_OBJ_NEW_QSTR, MP_OBJ_QSTR_VALUE - MP_OBJ_FUN_MAKE_SIG - MP_DECLARE_CONST_xxx - MP_DEFINE_CONST_xxx These must remain macros because they are used when defining const data (at least, MP_OBJ_NEW_SMALL_INT is so it makes sense to have MP_OBJ_SMALL_INT_VALUE also a macro). For those macros that have been made lower case, compatibility macros are provided for the old names so that users do not need to change their code immediately.
81 lines
2.9 KiB
C
81 lines
2.9 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) 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/runtime.h"
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#if MICROPY_PY_BUILTINS_REVERSED
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typedef struct _mp_obj_reversed_t {
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mp_obj_base_t base;
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mp_obj_t seq; // sequence object that we are reversing
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mp_uint_t cur_index; // current index, plus 1; 0=no more, 1=last one (index 0)
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} mp_obj_reversed_t;
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STATIC mp_obj_t reversed_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 1, false);
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// check if __reversed__ exists, and if so delegate to it
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mp_obj_t dest[2];
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mp_load_method_maybe(args[0], MP_QSTR___reversed__, dest);
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if (dest[0] != MP_OBJ_NULL) {
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return mp_call_method_n_kw(0, 0, dest);
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}
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mp_obj_reversed_t *o = m_new_obj(mp_obj_reversed_t);
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o->base.type = type;
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o->seq = args[0];
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o->cur_index = mp_obj_get_int(mp_obj_len(args[0])); // start at the end of the sequence
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return MP_OBJ_FROM_PTR(o);
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}
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STATIC mp_obj_t reversed_iternext(mp_obj_t self_in) {
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mp_check_self(mp_obj_is_type(self_in, &mp_type_reversed));
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mp_obj_reversed_t *self = MP_OBJ_TO_PTR(self_in);
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// "raise" stop iteration if we are at the end (the start) of the sequence
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if (self->cur_index == 0) {
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return MP_OBJ_STOP_ITERATION;
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}
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// pre-decrement and index sequence
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self->cur_index -= 1;
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return mp_obj_subscr(self->seq, MP_OBJ_NEW_SMALL_INT(self->cur_index), MP_OBJ_SENTINEL);
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}
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const mp_obj_type_t mp_type_reversed = {
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{ &mp_type_type },
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.name = MP_QSTR_reversed,
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.make_new = reversed_make_new,
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.getiter = mp_identity_getiter,
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.iternext = reversed_iternext,
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};
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#endif // MICROPY_PY_BUILTINS_REVERSED
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