Function write_sector_data

arch/brother/encoder.cc:60–98

}

static void write_sector_data(
    std::vector<bool>& bits, unsigned& cursor, const Bytes& data)
{
    write_bits(bits, cursor, 0xffffffff, 32);
    write_bits(bits, cursor, BROTHER_DATA_RECORD, 32);

    uint16_t fifo = 0;
    int width = 0;

    if (data.size() != BROTHER_DATA_RECORD_PAYLOAD)
        error("unsupported sector size");

    auto write_byte = [&](uint8_t byte)
    {
        fifo |= (byte << (8 - width));
        width += 8;

        while (width >= 5)
        {
            uint8_t quintet = fifo >> 11;
            fifo <<= 5;
            width -= 5;

            write_bits(bits, cursor, encode_data_gcr(quintet), 8);
        }
    };

    for (uint8_t byte : data)
        write_byte(byte);

    uint32_t realCrc = crcbrother(data);
    write_byte(realCrc >> 16);
    write_byte(realCrc >> 8);
    write_byte(realCrc);
    write_byte(0x58); /* magic */
    write_byte(0xd4);
    while (width != 0)
        write_byte(0);
}

class BrotherEncoder : public Encoder
{