63 lines
2.5 KiB
C
63 lines
2.5 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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* SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
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* Copyright (c) 2014 Paul Sokolovsky
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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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#ifndef MICROPY_INCLUDED_PY_OBJARRAY_H
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#define MICROPY_INCLUDED_PY_OBJARRAY_H
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#include "py/obj.h"
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// Used only for memoryview types, set in "typecode" to indicate a writable memoryview
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#define MP_OBJ_ARRAY_TYPECODE_FLAG_RW (0x80)
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// This structure is used for all of bytearray, array.array, memoryview
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// objects. Note that memoryview has different meaning for some fields,
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// see comment at the beginning of objarray.c.
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typedef struct _mp_obj_array_t {
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mp_obj_base_t base;
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size_t typecode : 8;
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// free is number of unused elements after len used elements
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// alloc size = len + free
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// But for memoryview, 'free' is reused as offset (in elements) into the
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// parent object. (Union is not used to not go into a complication of
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// union-of-bitfields with different toolchains). See comments in
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// objarray.c.
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size_t free : (8 * sizeof(size_t) - 8);
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size_t len; // in elements
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void *items;
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} mp_obj_array_t;
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#if MICROPY_PY_BUILTINS_MEMORYVIEW
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static inline void mp_obj_memoryview_init(mp_obj_array_t *self, size_t typecode, size_t offset, size_t len, void *items) {
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self->base.type = &mp_type_memoryview;
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self->typecode = typecode;
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self->free = offset;
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self->len = len;
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self->items = items;
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}
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#endif
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#endif // MICROPY_INCLUDED_PY_OBJARRAY_H
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