codecs$hex.java

SAP这个系统的一个转换器

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

package com.sap.mw.jco.util;


// Referenced classes of package com.sap.mw.jco.util:
//            Codecs

public static class Codecs$Hex
{

    public static final String encode(byte value[])
    {
        if(value == null)
            return "";
        char s[] = new char[value.length * 2];
        int i = 0;
        int k = 0;
        for(; i < value.length; i++)
        {
            s[k++] = hex[value[i] >> 4 & 0xf];
            s[k++] = hex[value[i] & 0xf];
        }

        return new String(s);
    }

    public static final String encode(byte value)
    {
        char s[] = new char[2];
        s[0] = hex[value >> 4 & 0xf];
        s[1] = hex[value & 0xf];
        return new String(s);
    }

    public static final String encode(char value)
    {
        char s[] = new char[4];
        s[0] = hex[value >> 12 & 0xf];
        s[1] = hex[value >> 8 & 0xf];
        s[2] = hex[value >> 4 & 0xf];
        s[3] = hex[value & 0xf];
        return new String(s);
    }

    public static final String encode(int value)
    {
        char s[] = new char[8];
        s[0] = hex[value >> 28 & 0xf];
        s[1] = hex[value >> 24 & 0xf];
        s[2] = hex[value >> 20 & 0xf];
        s[3] = hex[value >> 16 & 0xf];
        s[4] = hex[value >> 12 & 0xf];
        s[5] = hex[value >> 8 & 0xf];
        s[6] = hex[value >> 4 & 0xf];
        s[7] = hex[value & 0xf];
        return new String(s);
    }

    public static final byte[] decode(String value)
    {
        if(value == null)
        {
            return new byte[0];
        } else
        {
            char chars[] = value.toCharArray();
            return decode(chars, 0, chars.length);
        }
    }

    public static final byte[] decode(char chars[], int offset, int length)
    {
        if(chars == null)
            return new byte[0];
        byte buf[] = new byte[(length + 1) / 2];
        for(int i = 0; i < length; i++)
        {
            byte d = (byte)Character.digit(chars[offset + i], 16);
            buf[i >> 1] |= d << (1 - (i & 1) << 2);
        }

        return buf;
    }

    private static char hex[] = {
        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 
        'A', 'B', 'C', 'D', 'E', 'F'
    };


    public Codecs$Hex()
    {
    }
}