KeySize
size_t KeySize();
return index.KeySize();
return sizeof(BlockInDataFork) + maxRecords * KeySize()
return availableSpace / (KeySize() + PtrSize());
return BlockLen() + maxRecords * KeySize() + (pos - 1) * PtrSize();
((char*)buffer + BlockLen() + (pos - 1) * KeySize());
off_t offset = (pos - 1) * KeySize();
return lengthOfDataFork / (KeySize() + PtrSize());
size_t KeySize();