Steve Karg
4b9e154256
* added COBS encode and decode from BACnet standard * Add unit tests for COBS encoding and decoding * Improve COBS unit test and API. Co-authored-by: Steve Karg <skarg@users.sourceforge.net>
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2014 Kerry Lynn <kerlyn@ieee.org>
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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
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*********************************************************************/
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#ifndef COBS_H
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#define COBS_H
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#include <stddef.h>
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#include <stdint.h>
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#include "bacnet/bacnet_stack_exports.h"
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/* number of bytes needed for COBS encoded CRC */
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#define COBS_ENCODED_CRC_SIZE 5
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/* inclusive extra bytes needed for APDU */
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#define COBS_ENCODED_SIZE(a) ((a)+((a)/254)+1)
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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BACNET_STACK_EXPORT
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size_t cobs_encode(
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uint8_t *buffer,
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size_t buffer_size,
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const uint8_t *from,
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size_t length,
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uint8_t mask);
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BACNET_STACK_EXPORT
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size_t cobs_frame_encode(
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uint8_t *buffer,
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size_t buffer_size,
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const uint8_t *from,
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size_t length);
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BACNET_STACK_EXPORT
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size_t cobs_decode(
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uint8_t *buffer,
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size_t buffer_size,
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const uint8_t *from,
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size_t length,
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uint8_t mask);
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BACNET_STACK_EXPORT
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size_t cobs_frame_decode(
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uint8_t *buffer,
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size_t buffer_size,
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const uint8_t *from,
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size_t length);
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BACNET_STACK_EXPORT
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uint32_t cobs_crc32k(
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uint8_t dataValue,
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uint32_t crc);
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BACNET_STACK_EXPORT
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size_t cobs_crc32k_encode(
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uint8_t *buffer,
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size_t buffer_size,
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uint32_t crc);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif
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