Method ReadVLong

be/src/exec/scanner-context.inline.h:142–172

}

inline bool ScannerContext::Stream::ReadVLong(int64_t* value, Status* status) {
  int8_t* firstbyte;
  uint8_t* bytes;

  RETURN_IF_FALSE(ReadBytes(1, reinterpret_cast<uint8_t**>(&firstbyte), status));

  int len = ReadWriteUtil::DecodeVIntSize(*firstbyte);
  bool is_negative = ReadWriteUtil::IsNegativeVInt(*firstbyte);
  if (len > ReadWriteUtil::MAX_VINT_LEN) {
    *status = Status("ReadVLong: size is too big");
    return false;
  }

  if (len == 1) {
    *value = static_cast<int64_t>(*firstbyte);
    return true;
  }
  --len;

  RETURN_IF_FALSE(ReadBytes(len, &bytes, status));

  *value = 0;

  for (int i = 0; i < len; i++) {
    *value = (*value << 8) | (bytes[i] & 0xFF);
  }

  if (is_negative) *value = *value ^ (static_cast<int64_t>(-1));

  return true;
}

inline bool ScannerContext::Stream::ReadZLong(int64_t* value, Status* status) {
  uint8_t* bytes;