package net.minecraft.server; import java.io.DataInputStream; import java.io.DataOutputStream; import java.io.IOException; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip.Inflater; public class Packet51MapChunk extends Packet { public int a; public int b; public int c; public int d; private byte[] buffer; private byte[] inflatedBuffer; public boolean e; private int size; private static byte[] buildBuffer = new byte[196864]; public Packet51MapChunk() { this.lowPriority = true; } public Packet51MapChunk(Chunk chunk, boolean flag, int i) { this.lowPriority = true; this.a = chunk.x; this.b = chunk.z; this.e = flag; ChunkMap chunkmap = a(chunk, flag, i); Deflater deflater = new Deflater(-1); this.d = chunkmap.c; this.c = chunkmap.b; try { this.inflatedBuffer = chunkmap.a; deflater.setInput(chunkmap.a, 0, chunkmap.a.length); deflater.finish(); this.buffer = new byte[chunkmap.a.length]; this.size = deflater.deflate(this.buffer); } finally { deflater.end(); } } public void a(DataInputStream datainputstream) throws IOException { // CraftBukkit - throws IOException this.a = datainputstream.readInt(); this.b = datainputstream.readInt(); this.e = datainputstream.readBoolean(); this.c = datainputstream.readShort(); this.d = datainputstream.readShort(); this.size = datainputstream.readInt(); if (buildBuffer.length < this.size) { buildBuffer = new byte[this.size]; } datainputstream.readFully(buildBuffer, 0, this.size); int i = 0; int j; for (j = 0; j < 16; ++j) { i += this.c >> j & 1; } j = 12288 * i; if (this.e) { j += 256; } this.inflatedBuffer = new byte[j]; Inflater inflater = new Inflater(); inflater.setInput(buildBuffer, 0, this.size); try { inflater.inflate(this.inflatedBuffer); } catch (DataFormatException dataformatexception) { throw new IOException("Bad compressed data format"); } finally { inflater.end(); } } public void a(DataOutputStream dataoutputstream) throws IOException { // CraftBukkit - throws IOException dataoutputstream.writeInt(this.a); dataoutputstream.writeInt(this.b); dataoutputstream.writeBoolean(this.e); dataoutputstream.writeShort((short) (this.c & '\uffff')); dataoutputstream.writeShort((short) (this.d & '\uffff')); dataoutputstream.writeInt(this.size); dataoutputstream.write(this.buffer, 0, this.size); } public void handle(NetHandler nethandler) { nethandler.a(this); } public int a() { return 17 + this.size; } public static ChunkMap a(Chunk chunk, boolean flag, int i) { int j = 0; ChunkSection[] achunksection = chunk.i(); int k = 0; ChunkMap chunkmap = new ChunkMap(); byte[] abyte = buildBuffer; if (flag) { chunk.seenByPlayer = true; } int l; for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && (i & 1 << l) != 0) { chunkmap.b |= 1 << l; if (achunksection[l].i() != null) { chunkmap.c |= 1 << l; ++k; } } } for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && (i & 1 << l) != 0) { byte[] abyte1 = achunksection[l].g(); System.arraycopy(abyte1, 0, abyte, j, abyte1.length); j += abyte1.length; } } NibbleArray nibblearray; for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && (i & 1 << l) != 0) { nibblearray = achunksection[l].j(); System.arraycopy(nibblearray.a, 0, abyte, j, nibblearray.a.length); j += nibblearray.a.length; } } for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && (i & 1 << l) != 0) { nibblearray = achunksection[l].k(); System.arraycopy(nibblearray.a, 0, abyte, j, nibblearray.a.length); j += nibblearray.a.length; } } for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && (i & 1 << l) != 0) { nibblearray = achunksection[l].l(); System.arraycopy(nibblearray.a, 0, abyte, j, nibblearray.a.length); j += nibblearray.a.length; } } if (k > 0) { for (l = 0; l < achunksection.length; ++l) { if (achunksection[l] != null && (!flag || !achunksection[l].a()) && achunksection[l].i() != null && (i & 1 << l) != 0) { nibblearray = achunksection[l].i(); System.arraycopy(nibblearray.a, 0, abyte, j, nibblearray.a.length); j += nibblearray.a.length; } } } // CraftBukkit start - Hackiest hack to have ever hacked. // First of all, check to see if we flagged it to send, and all data is "0" // This means that it's an "EmptyChunk," HOWEVER... It's not a physical EmptyChunk on the server, there is simply no data present if (flag && i == 0xffff && j == 0 && chunkmap.b == 0 && chunkmap.c == 0) { chunkmap.b = 1; j = 10240; java.util.Arrays.fill(abyte, 0, j, (byte) 0); } // CraftBukkit end if (flag) { byte[] abyte2 = chunk.m(); System.arraycopy(abyte2, 0, abyte, j, abyte2.length); j += abyte2.length; } chunkmap.a = new byte[j]; System.arraycopy(abyte, 0, chunkmap.a, 0, j); return chunkmap; } }