int32_t CBC_DataMatrixDecodedBitStreamParser::DecodeAsciiSegment(
    CBC_CommonBitSource* bits,
    CFX_ByteString& result,
    CFX_ByteString& resultTrailer,
    int32_t& e) {
  FX_CHAR buffer[128];
  FX_BOOL upperShift = FALSE;
  do {
    int32_t oneByte = bits->ReadBits(8, e);
    BC_EXCEPTION_CHECK_ReturnValue(e, 0);
    if (oneByte == 0) {
      e = BCExceptionFormatException;
      return 0;
    } else if (oneByte <= 128) {
      oneByte = upperShift ? oneByte + 128 : oneByte;
      upperShift = FALSE;
      result += ((FX_CHAR)(oneByte - 1));
      return ASCII_ENCODE;
    } else if (oneByte == 129) {
      return PAD_ENCODE;
    } else if (oneByte <= 229) {
      int32_t value = oneByte - 130;
#if defined(_FX_WINAPI_PARTITION_APP_)
      memset(buffer, 0, sizeof(FX_CHAR) * 128);
      _itoa_s(value, buffer, 128, 10);
#else
      FXSYS_itoa(value, buffer, 10);
#endif
      if (value < 10) {
        result += '0';
        buffer[1] = '\0';
      } else {
        buffer[2] = '\0';
      }
      result += buffer;
    } else if (oneByte == 230) {
      return C40_ENCODE;
    } else if (oneByte == 231) {
      return BASE256_ENCODE;
    } else if (oneByte == 232 || oneByte == 233 || oneByte == 234) {
    } else if (oneByte == 235) {
      upperShift = TRUE;
    } else if (oneByte == 236) {
      result += "[)>";
      result += 0x1E;
      result += "05";
      result += 0x1D;
      resultTrailer.Insert(0, 0x1E);
      resultTrailer.Insert(0 + 1, 0x04);
    } else if (oneByte == 237) {
      result += "[)>";
      result += 0x1E;
      result += "06";
      result += 0x1D;
      resultTrailer.Insert(0, 0x1E);
      resultTrailer.Insert(0 + 1, 0x04);
    } else if (oneByte == 238) {
      return ANSIX12_ENCODE;
    } else if (oneByte == 239) {
      return TEXT_ENCODE;
    } else if (oneByte == 240) {
      return EDIFACT_ENCODE;
    } else if (oneByte == 241) {
    } else if (oneByte >= 242) {
      if (oneByte == 254 && bits->Available() == 0) {
      } else {
        e = BCExceptionFormatException;
        return 0;
      }
    }
  } while (bits->Available() > 0);
  return ASCII_ENCODE;
}