track2_encode

track2_encode.cpp

  // track2 4-bit BCD encode
  std::string track2 = ";4088490010739415=24082260007000?3";
  std::string encoded = "";
  uint8_t acc = 0;
  bool full = false;
  for (uint8_t c : track2)
  {
      if (!full)
      {
          acc = c - 0x30;
          acc <<= 4;
          full = !full;
      }
      else
      {
          acc |= c - 0x30;
          std::cout
              << unsigned(acc) << " ";
          encoded.append(1, acc);
          acc = 0;
          full = !full;
      }
  }
  // Output: 180 8 132 144 1 7 57 65 93 36 8 34 96 0 112 0 243