Method ZapRegionInRawChunkData

Tools/BlockZapper/Zapper.cpp:184–240

void cZapper::ZapRegionInRawChunkData(const cRegion & a_Region, AString & a_ChunkData, int a_ChunkX, int a_ChunkZ)
{
	// Decompress the data:
	char Uncompressed[CHUNK_INFLATE_MAX];
	z_stream strm;
	strm.zalloc = (alloc_func)NULL;
	strm.zfree = (free_func)NULL;
	strm.opaque = NULL;
	inflateInit(&strm);
	strm.next_out  = (Bytef *)Uncompressed;
	strm.avail_out = sizeof(Uncompressed);
	strm.next_in   = (Bytef *)a_ChunkData.data();
	strm.avail_in  = a_ChunkData.size();
	int res = inflate(&strm, Z_FINISH);
	inflateEnd(&strm);
	if (res != Z_STREAM_END)
	{
		fprintf(stderr, "Chunk [%d, %d] failed to decompress: error %d. Skipping chunk.", a_ChunkX, a_ChunkZ, res);
		return;
	}

	/*
	// DEBUG: Output src to a file:
	cFile f1;
	if (f1.Open(Printf("chunk_%d_%d_in.nbt", a_ChunkX, a_ChunkZ), cFile::fmWrite))
	{
		f1.Write(Uncompressed, strm.total_out);
	}
	//*/

	cParsedNBT NBT(Uncompressed, strm.total_out);
	if (!NBT.IsValid())
	{
		fprintf(stderr, "Chunk [%d, %d] failed to parse. Skipping chunk.", a_ChunkX, a_ChunkZ);
		return;
	}
	ZapRegionInNBTChunk(a_Region, NBT, a_ChunkX, a_ChunkZ);
	
	cFastNBTWriter Writer;
	for (int ch = NBT.GetFirstChild(0); ch >= 0; ch = NBT.GetNextSibling(ch))
	{
		SerializeNBTTag(NBT, ch, Writer);
	}
	Writer.Finish();
	
	/*
	// DEBUG: Output dst to a file:
	cFile f2;
	if (f2.Open(Printf("chunk_%d_%d_out.nbt", a_ChunkX, a_ChunkZ), cFile::fmWrite))
	{
		f2.Write(Writer.GetResult().data(), Writer.GetResult().size());
	}
	//*/

	// Compress the serialized data into "Uncompressed" (reuse buffer)
	CompressString(Writer.GetResult().data(), Writer.GetResult().size(), a_ChunkData);
}