misc/libphysfs/lzma/Java/SevenZip/Compression/RangeCoder/Decoder.java
changeset 13881 99b265e0d1d0
parent 13880 5f819b90d479
child 13882 b172a5d40eee
--- a/misc/libphysfs/lzma/Java/SevenZip/Compression/RangeCoder/Decoder.java	Thu Oct 11 23:43:31 2018 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,88 +0,0 @@
-package SevenZip.Compression.RangeCoder;
-import java.io.IOException;
-
-public class Decoder
-{
-	static final int kTopMask = ~((1 << 24) - 1);
-	
-	static final int kNumBitModelTotalBits = 11;
-	static final int kBitModelTotal = (1 << kNumBitModelTotalBits);
-	static final int kNumMoveBits = 5;
-	
-	int Range;
-	int Code;
-
-	java.io.InputStream Stream;
-	
-	public final void SetStream(java.io.InputStream stream)
-	{ 
-		Stream = stream; 
-	}
-	
-	public final void ReleaseStream()
-	{ 
-		Stream = null; 
-	}
-	
-	public final void Init() throws IOException
-	{
-		Code = 0;
-		Range = -1;
-		for (int i = 0; i < 5; i++)
-			Code = (Code << 8) | Stream.read();
-	}
-	
-	public final int DecodeDirectBits(int numTotalBits) throws IOException
-	{
-		int result = 0;
-		for (int i = numTotalBits; i != 0; i--)
-		{
-			Range >>>= 1;
-			int t = ((Code - Range) >>> 31);
-			Code -= Range & (t - 1);
-			result = (result << 1) | (1 - t);
-			
-			if ((Range & kTopMask) == 0)
-			{
-				Code = (Code << 8) | Stream.read();
-				Range <<= 8;
-			}
-		}
-		return result;
-	}
-	
-	public int DecodeBit(short []probs, int index) throws IOException
-	{
-		int prob = probs[index];
-		int newBound = (Range >>> kNumBitModelTotalBits) * prob;
-		if ((Code ^ 0x80000000) < (newBound ^ 0x80000000))
-		{
-			Range = newBound;
-			probs[index] = (short)(prob + ((kBitModelTotal - prob) >>> kNumMoveBits));
-			if ((Range & kTopMask) == 0)
-			{
-				Code = (Code << 8) | Stream.read();
-				Range <<= 8;
-			}
-			return 0;
-		}
-		else
-		{
-			Range -= newBound;
-			Code -= newBound;
-			probs[index] = (short)(prob - ((prob) >>> kNumMoveBits));
-			if ((Range & kTopMask) == 0)
-			{
-				Code = (Code << 8) | Stream.read();
-				Range <<= 8;
-			}
-			return 1;
-		}
-	}
-	
-	public static void InitBitModels(short []probs)
-	{
-		for (int i = 0; i < probs.length; i++)
-			probs[i] = (kBitModelTotal >>> 1);
-	}
-}