Fixed a piston crash (AIOOBE).

1 files changed, 155 insertions, 0 deletions

diff --git a/src/main/java/net/minecraft/server/BlockPistonExtension.java b/src/main/java/net/minecraft/server/BlockPistonExtension.java
new file mode 100644
index 00000000..8a1ae401
--- /dev/null
+++ b/src/main/java/net/minecraft/server/BlockPistonExtension.java
@@ -0,0 +1,155 @@
+package net.minecraft.server;
+
+import java.util.ArrayList;
+import java.util.Random;
+
+public class BlockPistonExtension extends Block {
+
+    private int a = -1;
+
+    public BlockPistonExtension(int i, int j) {
+        super(i, j, Material.PISTON);
+        this.a(h);
+        this.c(0.5F);
+    }
+
+    public void remove(World world, int i, int j, int k) {
+        super.remove(world, i, j, k);
+        int l = world.getData(i, j, k);
+        if (l > 5 || l < 0) return; // CraftBukkit - fixed a piston AIOOBE issue.
+        int i1 = PistonBlockTextures.a[b(l)];
+
+        i += PistonBlockTextures.b[i1];
+        j += PistonBlockTextures.c[i1];
+        k += PistonBlockTextures.d[i1];
+        int j1 = world.getTypeId(i, j, k);
+
+        if (j1 == Block.PISTON.id || j1 == Block.PISTON_STICKY.id) {
+            l = world.getData(i, j, k);
+            if (BlockPiston.d(l)) {
+                Block.byId[j1].g(world, i, j, k, l);
+                world.setTypeId(i, j, k, 0);
+            }
+        }
+    }
+
+    public int a(int i, int j) {
+        int k = b(j);
+
+        return i == k ? (this.a >= 0 ? this.a : ((j & 8) != 0 ? this.textureId - 1 : this.textureId)) : (i == PistonBlockTextures.a[k] ? 107 : 108);
+    }
+
+    public boolean a() {
+        return false;
+    }
+
+    public boolean b() {
+        return false;
+    }
+
+    public boolean canPlace(World world, int i, int j, int k) {
+        return false;
+    }
+
+    public boolean canPlace(World world, int i, int j, int k, int l) {
+        return false;
+    }
+
+    public int a(Random random) {
+        return 0;
+    }
+
+    public void a(World world, int i, int j, int k, AxisAlignedBB axisalignedbb, ArrayList arraylist) {
+        int l = world.getData(i, j, k);
+
+        switch (b(l)) {
+        case 0:
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.375F, 0.25F, 0.375F, 0.625F, 1.0F, 0.625F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            break;
+
+        case 1:
+            this.a(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.375F, 0.0F, 0.375F, 0.625F, 0.75F, 0.625F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            break;
+
+        case 2:
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.25F, 0.375F, 0.25F, 0.75F, 0.625F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            break;
+
+        case 3:
+            this.a(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.25F, 0.375F, 0.0F, 0.75F, 0.625F, 0.75F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            break;
+
+        case 4:
+            this.a(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.375F, 0.25F, 0.25F, 0.625F, 0.75F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            break;
+
+        case 5:
+            this.a(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+            this.a(0.0F, 0.375F, 0.25F, 0.75F, 0.625F, 0.75F);
+            super.a(world, i, j, k, axisalignedbb, arraylist);
+        }
+
+        this.a(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
+    }
+
+    public void a(IBlockAccess iblockaccess, int i, int j, int k) {
+        int l = iblockaccess.getData(i, j, k);
+
+        switch (b(l)) {
+        case 0:
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 0.25F, 1.0F);
+            break;
+
+        case 1:
+            this.a(0.0F, 0.75F, 0.0F, 1.0F, 1.0F, 1.0F);
+            break;
+
+        case 2:
+            this.a(0.0F, 0.0F, 0.0F, 1.0F, 1.0F, 0.25F);
+            break;
+
+        case 3:
+            this.a(0.0F, 0.0F, 0.75F, 1.0F, 1.0F, 1.0F);
+            break;
+
+        case 4:
+            this.a(0.0F, 0.0F, 0.0F, 0.25F, 1.0F, 1.0F);
+            break;
+
+        case 5:
+            this.a(0.75F, 0.0F, 0.0F, 1.0F, 1.0F, 1.0F);
+        }
+    }
+
+    public void doPhysics(World world, int i, int j, int k, int l) {
+        int i1 = b(world.getData(i, j, k));
+        if (i1 > 5 || i1 < 0) return; // CraftBukkit - fixed a piston AIOOBE issue.
+        int j1 = world.getTypeId(i - PistonBlockTextures.b[i1], j - PistonBlockTextures.c[i1], k - PistonBlockTextures.d[i1]);
+
+        if (j1 != Block.PISTON.id && j1 != Block.PISTON_STICKY.id) {
+            world.setTypeId(i, j, k, 0);
+        } else {
+            Block.byId[j1].doPhysics(world, i - PistonBlockTextures.b[i1], j - PistonBlockTextures.c[i1], k - PistonBlockTextures.d[i1], l);
+        }
+    }
+
+    public static int b(int i) {
+        return i & 7;
+    }
+}