hextranslator.java

java 文件下载器。可自定义

// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   HexTranslator.java

package org.bouncycastle.util.encoders;


// Referenced classes of package org.bouncycastle.util.encoders:
//			Translator

public class HexTranslator
	implements Translator
{

	private static final byte hexTable[] = {
		48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 
		97, 98, 99, 100, 101, 102
	};

	public HexTranslator()
	{
	}

	public int getEncodedBlockSize()
	{
		return 2;
	}

	public int encode(byte in[], int inOff, int length, byte out[], int outOff)
	{
		int i = 0;
		for (int j = 0; i < length; j += 2)
		{
			out[outOff + j] = hexTable[in[inOff] >> 4 & 0xf];
			out[outOff + j + 1] = hexTable[in[inOff] & 0xf];
			inOff++;
			i++;
		}

		return length * 2;
	}

	public int getDecodedBlockSize()
	{
		return 1;
	}

	public int decode(byte in[], int inOff, int length, byte out[], int outOff)
	{
		int halfLength = length / 2;
		for (int i = 0; i < halfLength; i++)
		{
			byte left = in[inOff + i * 2];
			byte right = in[inOff + i * 2 + 1];
			if (left < 97)
				out[outOff] = (byte)(left - 48 << 4);
			else
				out[outOff] = (byte)((left - 97) + 10 << 4);
			if (right < 97)
				out[outOff] += (byte)(right - 48);
			else
				out[outOff] += (byte)((right - 97) + 10);
			outOff++;
		}

		return halfLength;
	}

}