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cobsr.h
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79 lines (57 loc) · 2.09 KB
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/*****************************************************************************
*
* cobsr.h
*
* Consistent Overhead Byte Stuffing--Reduced (COBS/R)
*
****************************************************************************/
#ifndef COBSR_H_
#define COBSR_H_
/*****************************************************************************
* Includes
****************************************************************************/
#include <stdint.h>
#include <stdlib.h>
/*****************************************************************************
* Defines
****************************************************************************/
#define COBSR_ENCODE_DST_BUF_LEN_MAX(SRC_LEN) ((SRC_LEN) + (((SRC_LEN) + 253u)/254u))
#define COBSR_DECODE_DST_BUF_LEN_MAX(SRC_LEN) (SRC_LEN)
/*****************************************************************************
* Typedefs
****************************************************************************/
typedef enum
{
COBSR_ENCODE_OK = 0x00,
COBSR_ENCODE_NULL_POINTER = 0x01,
COBSR_ENCODE_OUT_BUFFER_OVERFLOW = 0x02
} cobsr_encode_status;
typedef struct
{
size_t out_len;
cobsr_encode_status status;
} cobsr_encode_result;
typedef enum
{
COBSR_DECODE_OK = 0x00,
COBSR_DECODE_NULL_POINTER = 0x01,
COBSR_DECODE_OUT_BUFFER_OVERFLOW = 0x02,
COBSR_DECODE_ZERO_BYTE_IN_INPUT = 0x04,
} cobsr_decode_status;
typedef struct
{
size_t out_len;
cobsr_decode_status status;
} cobsr_decode_result;
/*****************************************************************************
* Function prototypes
****************************************************************************/
#ifdef __cplusplus
extern "C" {
#endif
cobsr_encode_result cobsr_encode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t * src_ptr, size_t src_len);
cobsr_decode_result cobsr_decode(uint8_t *dst_buf_ptr, size_t dst_buf_len, const uint8_t * src_ptr, size_t src_len);
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* COBSR_H_ */