Method UpdateChunk1To2

src/WorldStorage/WSSCompact.cpp:561–699

void cWSSCompact::cPAKFile::UpdateChunk1To2()
{
	int Offset = 0;
	AString NewDataContents;
	int ChunksConverted = 0;
	for (sChunkHeaders::iterator itr = m_ChunkHeaders.begin(); itr != m_ChunkHeaders.end(); ++itr)
	{
		sChunkHeader * Header = *itr;

		if( ChunksConverted % 32 == 0 )
		{
			LOGINFO("Updating \"%s\" version 1 to version 2: " SIZE_T_FMT  " %%", m_FileName.c_str(), (ChunksConverted * 100) / m_ChunkHeaders.size() );
		}
		ChunksConverted++;

		AString Data;
		int UncompressedSize = Header->m_UncompressedSize;
		Data.assign(m_DataContents, Offset, Header->m_CompressedSize);
		Offset += Header->m_CompressedSize;

		// Crude data integrity check:
		int ExpectedSize = (16*128*16)*2 + (16*128*16)/2; // For version 1
		if (UncompressedSize < ExpectedSize)
		{
			LOGWARNING("Chunk [%d, %d] has too short decompressed data (%d bytes out of %d needed), erasing",
				Header->m_ChunkX, Header->m_ChunkZ,
				UncompressedSize, ExpectedSize
				);
			Offset += Header->m_CompressedSize;
			continue;
		}

		// Decompress the data:
		AString UncompressedData;
		{
			int errorcode = UncompressString(Data.data(), Data.size(), UncompressedData, UncompressedSize);
			if (errorcode != Z_OK)
			{
				LOGERROR("Error %d decompressing data for chunk [%d, %d]", 
					errorcode,
					Header->m_ChunkX, Header->m_ChunkZ
					);
				Offset += Header->m_CompressedSize;
				continue;
			}
		}

		if (UncompressedSize != (int)UncompressedData.size())
		{
			LOGWARNING("Uncompressed data size differs (exp %d bytes, got " SIZE_T_FMT  ") for chunk [%d, %d]",
				UncompressedSize, UncompressedData.size(),
				Header->m_ChunkX, Header->m_ChunkZ
				);
			Offset += Header->m_CompressedSize;
			continue;
		}