Method readBuffer

c++/src/ColumnReader.cc:1289–1298

* Read the valueStream for more bytes. */

     * Read the valueStream for more bytes.
     */
    void readBuffer() {
      while (buffer == bufferEnd) {
        int length;
        if (!valueStream->Next(reinterpret_cast<const void**>(&buffer), &length)) {
          throw ParseError("Read past end of stream in Decimal64ColumnReader " +
                           valueStream->getName());
        }
        bufferEnd = buffer + length;
      }
    }

    void readInt64(int64_t& value, int32_t currentScale) {
      value = 0;