Add PhysFS 2.0.3.

libs/physfs-2.0.3/lzma/Java/SevenZip/CRC.java

@@ -0,0 +1,52 @@
+// SevenZip/CRC.java
+
+package SevenZip;
+
+public class CRC
+{
+	static public int[] Table = new int[256];
+	
+	static
+	{
+		for (int i = 0; i < 256; i++)
+		{
+			int r = i;
+			for (int j = 0; j < 8; j++)
+				if ((r & 1) != 0)
+					r = (r >>> 1) ^ 0xEDB88320;
+				else
+					r >>>= 1;
+			Table[i] = r;
+		}
+	}
+	
+	int _value = -1;
+	
+	public void Init()
+	{
+		_value = -1;
+	}
+	
+	public void Update(byte[] data, int offset, int size)
+	{
+		for (int i = 0; i < size; i++)
+			_value = Table[(_value ^ data[offset + i]) & 0xFF] ^ (_value >>> 8);
+	}
+	
+	public void Update(byte[] data)
+	{
+		int size = data.length;
+		for (int i = 0; i < size; i++)
+			_value = Table[(_value ^ data[i]) & 0xFF] ^ (_value >>> 8);
+	}
+	
+	public void UpdateByte(int b)
+	{
+		_value = Table[(_value ^ b) & 0xFF] ^ (_value >>> 8);
+	}
+	
+	public int GetDigest()
+	{
+		return _value ^ (-1);
+	}
+}