kopia lustrzana https://github.com/micropython/micropython
62 wiersze
2.4 KiB
C
62 wiersze
2.4 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) 2013-2016 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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#ifndef MICROPY_INCLUDED_PY_READER_H
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#define MICROPY_INCLUDED_PY_READER_H
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#include "py/obj.h"
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#define MP_READER_EOF ((uintptr_t)(-1))
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// Reader ioctl request codes.
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#define MP_READER_CLOSE (1)
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#define MP_READER_MEMMAP (2)
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// Used as arg for MP_READER_MEMMAP ioctl request.
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typedef struct _mp_reader_ioctl_memmap_t {
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size_t len;
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const uint8_t *ptr;
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} mp_reader_ioctl_memmap_t;
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typedef struct _mp_reader_t {
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// Pointer to the context of this reader, passed as the first argument to the methods below.
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void *data;
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// The readbyte function must return the next byte in the input stream.
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// It must return MP_READER_EOF if end of stream. It can be called again after returning
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// MP_READER_EOF, and in that case must return MP_READER_EOF.
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uintptr_t (*readbyte)(void *data);
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// Ioctl method for performing various control actions.
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// On error it must return a negative errno value.
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intptr_t (*ioctl)(void *data, uintptr_t request, uintptr_t arg);
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} mp_reader_t;
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void mp_reader_new_mem(mp_reader_t *reader, const byte *buf, size_t len, size_t free_len);
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void mp_reader_new_file(mp_reader_t *reader, qstr filename);
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void mp_reader_new_file_from_fd(mp_reader_t *reader, int fd, bool close_fd);
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#endif // MICROPY_INCLUDED_PY_READER_H
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