001package net.minecraft.world.chunk.storage;
002
003import net.minecraft.nbt.NBTTagCompound;
004import net.minecraft.nbt.NBTTagList;
005import net.minecraft.world.biome.WorldChunkManager;
006import net.minecraft.world.chunk.NibbleArray;
007
008public class ChunkLoader
009{
010    public static AnvilConverterData load(NBTTagCompound par0NBTTagCompound)
011    {
012        int i = par0NBTTagCompound.getInteger("xPos");
013        int j = par0NBTTagCompound.getInteger("zPos");
014        AnvilConverterData anvilconverterdata = new AnvilConverterData(i, j);
015        anvilconverterdata.blocks = par0NBTTagCompound.getByteArray("Blocks");
016        anvilconverterdata.data = new NibbleArrayReader(par0NBTTagCompound.getByteArray("Data"), 7);
017        anvilconverterdata.skyLight = new NibbleArrayReader(par0NBTTagCompound.getByteArray("SkyLight"), 7);
018        anvilconverterdata.blockLight = new NibbleArrayReader(par0NBTTagCompound.getByteArray("BlockLight"), 7);
019        anvilconverterdata.heightmap = par0NBTTagCompound.getByteArray("HeightMap");
020        anvilconverterdata.terrainPopulated = par0NBTTagCompound.getBoolean("TerrainPopulated");
021        anvilconverterdata.entities = par0NBTTagCompound.getTagList("Entities");
022        anvilconverterdata.tileEntities = par0NBTTagCompound.getTagList("TileEntities");
023        anvilconverterdata.tileTicks = par0NBTTagCompound.getTagList("TileTicks");
024
025        try
026        {
027            anvilconverterdata.lastUpdated = par0NBTTagCompound.getLong("LastUpdate");
028        }
029        catch (ClassCastException classcastexception)
030        {
031            anvilconverterdata.lastUpdated = (long)par0NBTTagCompound.getInteger("LastUpdate");
032        }
033
034        return anvilconverterdata;
035    }
036
037    public static void convertToAnvilFormat(AnvilConverterData par0AnvilConverterData, NBTTagCompound par1NBTTagCompound, WorldChunkManager par2WorldChunkManager)
038    {
039        par1NBTTagCompound.setInteger("xPos", par0AnvilConverterData.x);
040        par1NBTTagCompound.setInteger("zPos", par0AnvilConverterData.z);
041        par1NBTTagCompound.setLong("LastUpdate", par0AnvilConverterData.lastUpdated);
042        int[] aint = new int[par0AnvilConverterData.heightmap.length];
043
044        for (int i = 0; i < par0AnvilConverterData.heightmap.length; ++i)
045        {
046            aint[i] = par0AnvilConverterData.heightmap[i];
047        }
048
049        par1NBTTagCompound.setIntArray("HeightMap", aint);
050        par1NBTTagCompound.setBoolean("TerrainPopulated", par0AnvilConverterData.terrainPopulated);
051        NBTTagList nbttaglist = new NBTTagList("Sections");
052        int j;
053
054        for (int k = 0; k < 8; ++k)
055        {
056            boolean flag = true;
057
058            for (j = 0; j < 16 && flag; ++j)
059            {
060                int l = 0;
061
062                while (l < 16 && flag)
063                {
064                    int i1 = 0;
065
066                    while (true)
067                    {
068                        if (i1 < 16)
069                        {
070                            int j1 = j << 11 | i1 << 7 | l + (k << 4);
071                            byte b0 = par0AnvilConverterData.blocks[j1];
072
073                            if (b0 == 0)
074                            {
075                                ++i1;
076                                continue;
077                            }
078
079                            flag = false;
080                        }
081
082                        ++l;
083                        break;
084                    }
085                }
086            }
087
088            if (!flag)
089            {
090                byte[] abyte = new byte[4096];
091                NibbleArray nibblearray = new NibbleArray(abyte.length, 4);
092                NibbleArray nibblearray1 = new NibbleArray(abyte.length, 4);
093                NibbleArray nibblearray2 = new NibbleArray(abyte.length, 4);
094
095                for (int k1 = 0; k1 < 16; ++k1)
096                {
097                    for (int l1 = 0; l1 < 16; ++l1)
098                    {
099                        for (int i2 = 0; i2 < 16; ++i2)
100                        {
101                            int j2 = k1 << 11 | i2 << 7 | l1 + (k << 4);
102                            byte b1 = par0AnvilConverterData.blocks[j2];
103                            abyte[l1 << 8 | i2 << 4 | k1] = (byte)(b1 & 255);
104                            nibblearray.set(k1, l1, i2, par0AnvilConverterData.data.get(k1, l1 + (k << 4), i2));
105                            nibblearray1.set(k1, l1, i2, par0AnvilConverterData.skyLight.get(k1, l1 + (k << 4), i2));
106                            nibblearray2.set(k1, l1, i2, par0AnvilConverterData.blockLight.get(k1, l1 + (k << 4), i2));
107                        }
108                    }
109                }
110
111                NBTTagCompound nbttagcompound1 = new NBTTagCompound();
112                nbttagcompound1.setByte("Y", (byte)(k & 255));
113                nbttagcompound1.setByteArray("Blocks", abyte);
114                nbttagcompound1.setByteArray("Data", nibblearray.data);
115                nbttagcompound1.setByteArray("SkyLight", nibblearray1.data);
116                nbttagcompound1.setByteArray("BlockLight", nibblearray2.data);
117                nbttaglist.appendTag(nbttagcompound1);
118            }
119        }
120
121        par1NBTTagCompound.setTag("Sections", nbttaglist);
122        byte[] abyte1 = new byte[256];
123
124        for (int k2 = 0; k2 < 16; ++k2)
125        {
126            for (j = 0; j < 16; ++j)
127            {
128                abyte1[j << 4 | k2] = (byte)(par2WorldChunkManager.getBiomeGenAt(par0AnvilConverterData.x << 4 | k2, par0AnvilConverterData.z << 4 | j).biomeID & 255);
129            }
130        }
131
132        par1NBTTagCompound.setByteArray("Biomes", abyte1);
133        par1NBTTagCompound.setTag("Entities", par0AnvilConverterData.entities);
134        par1NBTTagCompound.setTag("TileEntities", par0AnvilConverterData.tileEntities);
135
136        if (par0AnvilConverterData.tileTicks != null)
137        {
138            par1NBTTagCompound.setTag("TileTicks", par0AnvilConverterData.tileTicks);
139        }
140    }
141}