Method readByte

c++/src/ColumnReader.cc:374–383

    const char* bufferEnd_;

    unsigned char readByte() {
      if (bufferPointer_ == bufferEnd_) {
        int length;
        if (!inputStream_->Next(reinterpret_cast<const void**>(&bufferPointer_), &length)) {
          throw ParseError("bad read in DoubleColumnReader::next()");
        }
        bufferEnd_ = bufferPointer_ + length;
      }
      return static_cast<unsigned char>(*(bufferPointer_++));
    }

    ValueType read() {
      using BitType = std::conditional_t<columnKind == TypeKind::DOUBLE, int64_t, int32_t>;