// Copyright (c) 2006  Dustin Sallings <dustin@spy.net>

package net.spy.memcached.transcoders;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.UnsupportedEncodingException;
import java.util.Date;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import net.spy.SpyObject;
import net.spy.util.CloseUtil;

import net.spy.memcached.CachedData;

/**
 * Utility class for transcoding Java types.
 */
public final class TranscoderUtils {
	public static byte[] encodeNum(long l, int maxBytes) {
		byte[] rv=new byte[maxBytes];
		for(int i=0; i<rv.length; i++) {
			int pos=rv.length-i-1;
			rv[pos]=(byte) ((l >> (8 * i)) & 0xff);
		}
		int firstNonZero=0;
		for(;firstNonZero<rv.length && rv[firstNonZero]==0; firstNonZero++) {
			// Just looking for what we can reduce
		}
		if(firstNonZero > 0) {
			byte[] tmp=new byte[rv.length - firstNonZero];
			System.arraycopy(rv, firstNonZero, tmp, 0, rv.length-firstNonZero);
			rv=tmp;
		}
		return rv;
	}

	public static byte[] encodeLong(long l) {
		return encodeNum(l, 8);
	}

	public static long decodeLong(byte[] b) {
		long rv=0;
		for(byte i : b) {
			rv = (rv << 8) | (i<0?256+i:i);
		}
		return rv;
	}

	public static byte[] encodeInt(int in) {
		return encodeNum(in, 4);
	}

	public static int decodeInt(byte[] in) {
		assert in.length <= 4
			: "Too long to be an int (" + in.length + ") bytes";
		return (int)decodeLong(in);
	}

	public static byte[] encodeByte(byte in) {
		return new byte[]{in};
	}

	public static byte decodeByte(byte[] in) {
		assert in.length <= 1 : "Too long for a byte";
		byte rv=0;
		if(in.length == 1) {
			rv=in[0];
		}
		return rv;
	}

	public static byte[] encodeBoolean(boolean b) {
		byte[] rv=new byte[1];
		rv[0]=(byte)(b?'1':'0');
		return rv;
	}

	public static boolean decodeBoolean(byte[] in) {
		assert in.length == 1 : "Wrong length for a boolean";
		return in[0] == '1';
	}

}

Move the encode*() and decode*() methods in SerializingTranscoder.java into a new class and make them static. This will allow other transcoders to use them.
Move the encode*() and decode*() methods in SerializingTranscoder.java
into a new class and make them static.  This will allow other transcoders
to use them.
