/*
 * BinaryCrcCheck.cpp
 *
 *  Created on: 21 мая 2023 г.
 *      Author: titov
 */

#include "BinaryCrcCheck.hh"

driver::BinaryCrcCheck::BinaryCrcCheck(
        common::crc::ICrcUnit::CrcCalcualtor calculator,
        communication::IBinaryDataSubscriber & protected_data,
        std::size_t crc_bit_address, std::size_t crc_bit_len,
        std::size_t data_bit_address, std::size_t data_bit_len,
        std::pmr::memory_resource * memory_resource ) : calculator(calculator), protected_data(protected_data),
        extract_crc(crc_bit_address, crc_bit_len, false),
        extract_data(data_bit_address, data_bit_len), crc_mismatch(false),
        buffer_data(memory_resource) {

    data_octet_size = communication::format::bits::octet_on_bits(data_bit_len);

    buffer_data.reserve( data_byte_size = communication::format::bits::bytes_on_bits(data_bit_len) );
    temp_data_buffer = &buffer_data.front();

}

void driver::BinaryCrcCheck::read( const void * frame, std::size_t frame_size ) {

    //Размер кадра не проверяем.
    (void) frame_size;

    const void * data = extract_data( frame, temp_data_buffer );

    uint32_t crc_origin = 0;
    extract_crc( frame, &crc_origin );

    uint32_t crc_calc = (*calculator)( reinterpret_cast<const char *>(data), data_octet_size );

    bool crc_valid = (crc_origin == crc_calc);

    if( crc_valid )
        protected_data.read( data, data_byte_size );

    crc_mismatch = not crc_valid;

}

const bool & driver::BinaryCrcCheck::error() const {

    return crc_mismatch;

}