private static void CalcOffsets(FileSystem fileSystem)
{
fileSystem.m_BlockDataOffset = HeaderDataSize;
fileSystem.m_StringDataOffset = fileSystem.m_BlockDataOffset + BlockDataSize * fileSystem.m_HeaderData.MaxBlockCount;
fileSystem.m_FileDataOffset = (int)GetUpBoundClusterOffset(fileSystem.m_StringDataOffset + StringDataSize * fileSystem.m_HeaderData.MaxFileCount);
}