mirror of
https://github.com/trezor/trezor-firmware.git
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63 lines
2.4 KiB
C
63 lines
2.4 KiB
C
/**
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* Copyright (c) 2023 Trezor Company s.r.o.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is 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
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* in 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
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT HMAC_SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
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* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef __BUFFER_H
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#define __BUFFER_H
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include "options.h"
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// Buffer reader struct, wraps a pointer to const data.
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typedef struct {
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const uint8_t *data;
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size_t size;
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size_t pos;
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} BUFFER_READER;
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// Buffer writer struct, wraps a pointer to non-const data.
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typedef struct {
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uint8_t *data;
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size_t size;
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size_t pos;
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} BUFFER_WRITER;
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void buffer_reader_init(BUFFER_READER *buf, const uint8_t *data, size_t size);
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void buffer_writer_init(BUFFER_WRITER *buf, uint8_t *data, size_t size);
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size_t __wur buffer_remaining(BUFFER_READER *buf);
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bool __wur buffer_ptr(BUFFER_READER *buf, const uint8_t **ptr);
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bool __wur buffer_peek(const BUFFER_READER *buf, uint8_t *byte);
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bool __wur buffer_get(BUFFER_READER *buf, uint8_t *byte);
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bool __wur buffer_seek(BUFFER_READER *buf, size_t pos);
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bool __wur buffer_read_buffer(BUFFER_READER *src, BUFFER_READER *dest,
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size_t size);
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void buffer_lstrip(BUFFER_READER *buf, uint8_t byte);
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bool __wur buffer_put(BUFFER_WRITER *writer, uint8_t byte);
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bool __wur buffer_write_array(BUFFER_WRITER *writer, const uint8_t *src,
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size_t size);
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bool __wur buffer_write_buffer(BUFFER_WRITER *dest, BUFFER_READER *src);
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size_t __wur buffer_written_size(BUFFER_WRITER *writer);
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#endif // __BUFFER_H
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