uint64_t LengthFieldBasedFrameDecoder::getUnadjustedFrameLength()

in wangle/codec/LengthFieldBasedFrameDecoder.cpp [88:134]

• 44 lines of code
• 9 McCabe index (conditional complexity)

uint64_t LengthFieldBasedFrameDecoder::getUnadjustedFrameLength(
    IOBufQueue& buf,
    int offset,
    int length,
    bool networkByteOrder) {
  folly::io::Cursor c(buf.front());
  uint64_t frameLength;

  c.skip(offset);

  switch (length) {
    case 1: {
      if (networkByteOrder) {
        frameLength = c.readBE<uint8_t>();
      } else {
        frameLength = c.readLE<uint8_t>();
      }
      break;
    }
    case 2: {
      if (networkByteOrder) {
        frameLength = c.readBE<uint16_t>();
      } else {
        frameLength = c.readLE<uint16_t>();
      }
      break;
    }
    case 4: {
      if (networkByteOrder) {
        frameLength = c.readBE<uint32_t>();
      } else {
        frameLength = c.readLE<uint32_t>();
      }
      break;
    }
    case 8: {
      if (networkByteOrder) {
        frameLength = c.readBE<uint64_t>();
      } else {
        frameLength = c.readLE<uint64_t>();
      }
      break;
    }
  }

  return frameLength;
}