1 files changed, 96 insertions, 0 deletions
diff --git a/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/SEE2Context.java b/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/SEE2Context.java
new file mode 100644
index 0000000..378c0d3
--- /dev/null
+++ b/org.fox.ttcomics/src/main/java/org/fox/ttcomics2/junrar/unpack/ppm/SEE2Context.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2007 innoSysTec (R) GmbH, Germany. All rights reserved.
+ * Original author: Edmund Wagner
+ * Creation date: 31.05.2007
+ *
+ * Source: $HeadURL$
+ * Last changed: $LastChangedDate$
+ * 
+ * the unrar licence applies to all junrar source and binary distributions 
+ * you are not allowed to use this source to re-create the RAR compression algorithm
+ * 
+ * Here some html entities which can be used for escaping javadoc tags:
+ * "&":  "&#038;" or "&amp;"
+ * "<":  "&#060;" or "&lt;"
+ * ">":  "&#062;" or "&gt;"
+ * "@":  "&#064;" 
+ */
+package org.fox.ttcomics2.junrar.unpack.ppm;
+
+public class SEE2Context {
+    public static final int size = 4;
+
+    // ushort Summ;
+    private int summ;
+
+    // byte Shift;
+    private int shift;
+
+    // byte Count;
+    private int count;
+
+    public void init(int initVal) {
+        shift = (ModelPPM.PERIOD_BITS - 4) & 0xff;
+        summ = (initVal << shift) & 0xffff;
+        count = 4;
+    }
+
+    public int getMean() {
+        int retVal = summ >>> shift;
+        summ -= retVal;
+        return retVal + ((retVal == 0) ? 1 : 0);
+    }
+
+    public void update() {
+        if (shift < ModelPPM.PERIOD_BITS && --count == 0) {
+            summ += summ;
+            count = (3 << shift++);
+        }
+        summ &= 0xffff;
+        count &= 0xff;
+        shift &= 0xff;
+    }
+
+    public int getCount() {
+        return count;
+    }
+
+    public void setCount(int count) {
+        this.count = count & 0xff;
+    }
+
+    public int getShift() {
+        return shift;
+    }
+
+    public void setShift(int shift) {
+        this.shift = shift & 0xff;
+    }
+
+    public int getSumm() {
+        return summ;
+    }
+
+    public void setSumm(int summ) {
+        this.summ = summ & 0xffff;
+    }
+
+    public void incSumm(int dSumm) {
+        setSumm(getSumm() + dSumm);
+    }
+
+    public String toString() {
+        StringBuilder buffer = new StringBuilder();
+        buffer.append("SEE2Context[");
+        buffer.append("\n  size=");
+        buffer.append(size);
+        buffer.append("\n  summ=");
+        buffer.append(summ);
+        buffer.append("\n  shift=");
+        buffer.append(shift);
+        buffer.append("\n  count=");
+        buffer.append(count);
+        buffer.append("\n]");
+        return buffer.toString();
+    }
+}