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forked from xjboss/KCauldronX
KCauldronX/patches/net/minecraft/world/chunk/NibbleArray.java.patch
2015-03-22 20:38:04 +03:00

234 lines
6.8 KiB
Diff

--- ../src-base/minecraft/net/minecraft/world/chunk/NibbleArray.java
+++ ../src-work/minecraft/net/minecraft/world/chunk/NibbleArray.java
@@ -1,47 +1,215 @@
package net.minecraft.world.chunk;
+import java.util.Arrays; // Spigot
+
public class NibbleArray
{
- public final byte[] data;
+ public byte[] data; // Spigot - remove final // Cauldron - make public
private final int depthBits;
private final int depthBitsPlusFour;
private static final String __OBFID = "CL_00000371";
- public NibbleArray(int p_i1992_1_, int p_i1992_2_)
+ // Spigot start
+ private byte trivialValue;
+ private byte trivialByte;
+ private int length;
+ private static final int LEN2K = 2048; // Universal length used right now - optimize around this
+ private static final byte[][] TrivLen2k;
+
+ static
{
- this.data = new byte[p_i1992_1_ >> 1];
- this.depthBits = p_i1992_2_;
- this.depthBitsPlusFour = p_i1992_2_ + 4;
+ TrivLen2k = new byte[16][];
+
+ for (int i = 0; i < 16; i++)
+ {
+ TrivLen2k[i] = new byte[LEN2K];
+ Arrays.fill(TrivLen2k[i], (byte)(i | (i << 4)));
+ }
}
- public NibbleArray(byte[] p_i1993_1_, int p_i1993_2_)
+ // Try to convert array to trivial array
+ public void detectAndProcessTrivialArray()
{
- this.data = p_i1993_1_;
- this.depthBits = p_i1993_2_;
- this.depthBitsPlusFour = p_i1993_2_ + 4;
+ trivialValue = (byte)(data[0] & 0xF);
+ trivialByte = (byte)(trivialValue | (trivialValue << 4));
+
+ for (int i = 0; i < data.length; i++)
+ {
+ if (data[i] != trivialByte)
+ {
+ return;
+ }
+ }
+
+ // All values matches, so array is trivial
+ this.length = data.length;
+ this.data = null;
}
- public int get(int p_76582_1_, int p_76582_2_, int p_76582_3_)
+ // Force array to non-trivial state
+ public void forceToNonTrivialArray()
{
- int l = p_76582_2_ << this.depthBitsPlusFour | p_76582_3_ << this.depthBits | p_76582_1_;
+ if (this.data == null)
+ {
+ this.data = new byte[this.length];
+
+ if (this.trivialByte != 0)
+ {
+ Arrays.fill(this.data, this.trivialByte);
+ }
+ }
+ }
+
+ // Test if array is in trivial state
+ public boolean isTrivialArray()
+ {
+ return (this.data == null);
+ }
+
+ // Get value of all elements (only valid if array is in trivial state)
+ public int getTrivialArrayValue()
+ {
+ return this.trivialValue;
+ }
+
+ // Get logical length of byte array for nibble data (whether trivial or non-trivial)
+ public int getByteLength()
+ {
+ if (this.data == null)
+ {
+ return this.length;
+ }
+ else
+ {
+ return this.data.length;
+ }
+ }
+
+ // Return byte encoding of array (whether trivial or non-trivial) - returns read-only array if trivial (do not modify!)
+ public byte[] getValueArray()
+ {
+ if (this.data != null)
+ {
+ return this.data;
+ }
+ else
+ {
+ byte[] rslt;
+
+ if (this.length == LEN2K) // All current uses are 2k long, but be safe
+ {
+ rslt = TrivLen2k[this.trivialValue];
+ }
+ else
+ {
+ rslt = new byte[this.length];
+
+ if (this.trivialByte != 0)
+ {
+ Arrays.fill(rslt, this.trivialByte);
+ }
+ }
+
+ return rslt;
+ }
+ }
+
+ // Copy byte representation of array to given offset in given byte array
+ public int copyToByteArray(byte[] dest, int off)
+ {
+ if (this.data == null)
+ {
+ Arrays.fill(dest, off, off + this.length, this.trivialByte);
+ return off + this.length;
+ }
+ else
+ {
+ System.arraycopy(this.data, 0, dest, off, this.data.length);
+ return off + this.data.length;
+ }
+ }
+
+ // Resize array to given byte length
+ public void resizeArray(int len)
+ {
+ if (this.data == null)
+ {
+ this.length = len;
+ }
+ else if (this.data.length != len)
+ {
+ byte[] newa = new byte[len];
+ System.arraycopy(this.data, 0, newa, 0, ((this.data.length > len) ? len : this.data.length));
+ this.data = newa;
+ }
+ }
+ // Spigot end
+
+ public NibbleArray(int par1, int par2)
+ {
+ // Spigot start
+ //this.a = new byte[i >> 1];
+ this.data = null; // Start off as trivial value (all same zero value)
+ this.length = par1 >> 1;
+ this.trivialByte = this.trivialValue = 0;
+ // Spigot end
+ this.depthBits = par2;
+ this.depthBitsPlusFour = par2 + 4;
+ }
+
+ public NibbleArray(byte[] par1ArrayOfByte, int par2)
+ {
+ this.data = par1ArrayOfByte;
+ this.depthBits = par2;
+ this.depthBitsPlusFour = par2 + 4;
+ detectAndProcessTrivialArray(); // Spigot
+ }
+
+ public int get(int par1, int par2, int par3)
+ {
+ if (this.data == null)
+ {
+ return this.trivialValue; // Spigot
+ }
+
+ int l = par2 << this.depthBitsPlusFour | par3 << this.depthBits | par1;
int i1 = l >> 1;
int j1 = l & 1;
return j1 == 0 ? this.data[i1] & 15 : this.data[i1] >> 4 & 15;
}
- public void set(int p_76581_1_, int p_76581_2_, int p_76581_3_, int p_76581_4_)
+ public void set(int par1, int par2, int par3, int par4)
{
- int i1 = p_76581_2_ << this.depthBitsPlusFour | p_76581_3_ << this.depthBits | p_76581_1_;
+ // Spigot start
+ if (this.data == null)
+ {
+ if (par4 != this.trivialValue) // Not same as trivial value, array no longer trivial
+ {
+ this.data = new byte[this.length];
+
+ if (this.trivialByte != 0)
+ {
+ Arrays.fill(this.data, this.trivialByte);
+ }
+ }
+ else
+ {
+ return;
+ }
+ }
+
+ // Spigot end
+ int i1 = par2 << this.depthBitsPlusFour | par3 << this.depthBits | par1;
int j1 = i1 >> 1;
int k1 = i1 & 1;
if (k1 == 0)
{
- this.data[j1] = (byte)(this.data[j1] & 240 | p_76581_4_ & 15);
+ this.data[j1] = (byte)(this.data[j1] & 240 | par4 & 15);
}
else
{
- this.data[j1] = (byte)(this.data[j1] & 15 | (p_76581_4_ & 15) << 4);
+ this.data[j1] = (byte)(this.data[j1] & 15 | (par4 & 15) << 4);
}
}
}