papermc/CraftBukkit-Patches/0007-Include-NibbleArray-from-mc-dev-for-diff-visibility.patch

From b1188994f419db30faf032efdd1b3945d4046441 Mon Sep 17 00:00:00 2001
From: Mike Primm <mike@primmhome.com>
Date: Fri, 14 Dec 2012 21:51:06 -0600
Subject: [PATCH] Include NibbleArray from mc-dev for diff visibility

---
 .../java/net/minecraft/server/NibbleArray.java     | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 src/main/java/net/minecraft/server/NibbleArray.java

diff --git a/src/main/java/net/minecraft/server/NibbleArray.java b/src/main/java/net/minecraft/server/NibbleArray.java
new file mode 100644
index 0000000..5d75a54
--- /dev/null
+++ b/src/main/java/net/minecraft/server/NibbleArray.java
@@ -0,0 +1,40 @@
+package net.minecraft.server;
+
+public class NibbleArray {
+
+    public final byte[] a;
+    private final int b;
+    private final int c;
+
+    public NibbleArray(int i, int j) {
+        this.a = new byte[i >> 1];
+        this.b = j;
+        this.c = j + 4;
+    }
+
+    public NibbleArray(byte[] abyte, int i) {
+        this.a = abyte;
+        this.b = i;
+        this.c = i + 4;
+    }
+
+    public int a(int i, int j, int k) {
+        int l = j << this.c | k << this.b | i;
+        int i1 = l >> 1;
+        int j1 = l & 1;
+
+        return j1 == 0 ? this.a[i1] & 15 : this.a[i1] >> 4 & 15;
+    }
+
+    public void a(int i, int j, int k, int l) {
+        int i1 = j << this.c | k << this.b | i;
+        int j1 = i1 >> 1;
+        int k1 = i1 & 1;
+
+        if (k1 == 0) {
+            this.a[j1] = (byte) (this.a[j1] & 240 | l & 15);
+        } else {
+            this.a[j1] = (byte) (this.a[j1] & 15 | (l & 15) << 4);
+        }
+    }
+}
-- 
1.8.1-rc2