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65 lines
3.3 KiB
C
65 lines
3.3 KiB
C
/* Copyright (c) 2014 Nordic Semiconductor. All Rights Reserved.
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*
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* The information contained herein is property of Nordic Semiconductor ASA.
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* Terms and conditions of usage are described in detail in NORDIC
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* SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT.
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*
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* Licensees are granted free, non-transferable use of the information. NO
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* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
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* the file.
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*
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*/
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#include "stdint.h"
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typedef uint32_t (*field_encoder_handler_t)(void const * const p_field,
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uint8_t * const p_buf,
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uint32_t buf_len,
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uint32_t * const p_index);
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typedef uint32_t (*field_decoder_handler_t)(uint8_t const * const p_buf,
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uint32_t buf_len,
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uint32_t * const p_index,
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void * p_field);
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/**@brief Function for safe encoding conditional field.
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*
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* Function sets 'presence flag' and checks if conditional field is provided and if it is not NULL
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* it calls provided parser function which attempts to encode field content to the buffer stream.
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*
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* @param[in] p_field Pointer to input struct.
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* @param[in] p_buf Pointer to the beginning of the output buffer.
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* @param[in] buf_len Size of buffer.
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* @param[in,out] p_index \c in: Index to start of uint8 value in buffer.
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* \c out: Index in buffer to first byte after the encoded data.
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* @param[in] fp_field_encoder Pointer to the function which implements fields encoding.
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*
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* @return NRF_SUCCESS Fields decoded successfully.
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* @retval NRF_ERROR_INVALID_LENGTH Decoding failure. Incorrect buffer length.
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*/
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uint32_t cond_field_enc(void const * const p_field,
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uint8_t * const p_buf,
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uint32_t buf_len,
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uint32_t * const p_index,
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field_encoder_handler_t field_parser);
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/**@brief Function for safe decoding conditional field.
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*
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* Function checks if conditional field is present in the input buffer and if it is set it calls
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* provided parser function which attempts to parse buffer content to the known field.
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*
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* @param[in] p_buf Pointer to the beginning of the input buffer.
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* @param[in] buf_len Size of buffer.
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* @param[in,out] p_index \c in: Index to start of uint8 value in buffer.
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* \c out: Index in buffer to first byte after the decoded data.
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* @param[in] pp_field Pointer to pointer to output location.
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* @param[in] fp_field_decoder Pointer to the function which implements field decoding.
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*
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* @return NRF_SUCCESS Fields decoded successfully.
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* @retval NRF_ERROR_INVALID_LENGTH Decoding failure. Incorrect buffer length.
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*/
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uint32_t cond_field_dec(uint8_t const * const p_buf,
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uint32_t buf_len,
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uint32_t * const p_index,
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void * * const pp_field,
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field_decoder_handler_t field_parser);
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