java版变异base64 请高人转换成AU3-『提问交流』-AUTOIT CN

jackass110 发表于 2010-7-16 11:59:32

java版变异base64 请高人转换成AU3

java版变异base64 请高人转换成AU3

public class Base64
{

   public Base64()
   {
   }

   private static int decode0(char ibuf[], byte obuf[], int wp)
   {
            int outlen = 3;
            if(ibuf == '= ')
                     outlen = 2;
            if(ibuf == '= ')
                     outlen = 1;
            int b0 = S_DECODETABLE];
            int b1 = S_DECODETABLE];
            int b2 = S_DECODETABLE];
            int b3 = S_DECODETABLE];
            switch(outlen)
            {
            case 1: // '\001 '
                     obuf = (byte)(b0 < < 2 & 0xfc | b1 > > 4 & 3);
                     return 1;

            case 2: // '\002 '
                     obuf = (byte)(b0 < < 2 & 0xfc | b1 > > 4 & 3);
                     obuf = (byte)(b1 < < 4 & 0xf0 | b2 > > 2 & 0xf);
                     return 2;

            case 3: // '\003 '
                     obuf = (byte)(b0 < < 2 & 0xfc | b1 > > 4 & 3);
                     obuf = (byte)(b1 < < 4 & 0xf0 | b2 > > 2 & 0xf);
                     obuf = (byte)(b2 < < 6 & 0xc0 | b3 & 0x3f);
                     return 3;
            }
            throw new RuntimeException( " ");
   }

   public static byte[] decode(char data[], int off, int len)
   {
            char ibuf[] = new char;
            int ibufcount = 0;
            byte obuf[] = new byte[(len / 4) * 3 + 3];
            int obufcount = 0;
            for(int i = off; i < off + len; i++)
            {
                     char ch = data;
                     if(ch == '= ' || ch < S_DECODETABLE.length && S_DECODETABLE != 127)
                     {
                           ibuf = ch;
                           if(ibufcount == ibuf.length)
                           {
                                    ibufcount = 0;
                                    obufcount += decode0(ibuf, obuf, obufcount);
                           }
                     }
            }

            if(obufcount == obuf.length)
            {
                     return obuf;
            } else
            {
                     byte ret[] = new byte;
                     System.arraycopy(obuf, 0, ret, 0, obufcount);
                     return ret;
            }
   }

   public static byte[] decode(String data)
   {
            char ibuf[] = new char;
            int ibufcount = 0;
            byte obuf[] = new byte[(data.length() / 4) * 3 + 3];
            int obufcount = 0;
            for(int i = 0; i < data.length(); i++)
            {
                     char ch = data.charAt(i);
                     if(ch == '= ' || ch < S_DECODETABLE.length && S_DECODETABLE != 127)
                     {
                           ibuf = ch;
                           if(ibufcount == ibuf.length)
                           {
                                    ibufcount = 0;
                                    obufcount += decode0(ibuf, obuf, obufcount);
                           }
                     }
            }

            if(obufcount == obuf.length)
            {
                     return obuf;
            } else
            {
                     byte ret[] = new byte;
                     System.arraycopy(obuf, 0, ret, 0, obufcount);
                     return ret;
            }
   }

   public static String encode(byte data[])
   {
            return encode(data, 0, data.length);
   }

   public static String encode(byte data[], int off, int len)
   {
            if(len <= 0)
                     return " ";
            char out[] = new char[(len / 3) * 4 + 4];
            int rindex = off;
            int windex = 0;
            int rest;
            for(rest = len - off; rest > = 3; rest -= 3)
            {
                     int i = ((data & 0xff) < < 16) + ((data & 0xff) < < 8) + (data & 0xff);
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     rindex += 3;
            }

            if(rest == 1)
            {
                     int i = data & 0xff;
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     out = '= ';
                     out = '= ';
            } else
            if(rest == 2)
            {
                     int i = ((data & 0xff) < < 8) + (data & 0xff);
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     out = S_BASE64CHAR;
                     out = '= ';
            }
            return new String(out, 0, windex);
   }

   private static final char S_BASE64CHAR[] = {
            'A ', 'B ', 'C ', 'D ', 'E ', 'F ', 'G ', 'H ', 'I ', 'J ',
            'K ', 'L ', 'M ', 'N ', 'O ', 'P ', 'Q ', 'R ', 'S ', 'T ',
            'U ', 'V ', 'W ', 'X ', 'Y ', 'Z ', 'a ', 'b ', 'c ', 'd ',
            'e ', 'f ', 'g ', 'h ', 'i ', 'j ', 'k ', 'l ', 'm ', 'n ',
            'o ', 'p ', 'q ', 'r ', 's ', 't ', 'u ', 'v ', 'w ', 'x ',
            'y ', 'z ', '0 ', '1 ', '2 ', '3 ', '4 ', '5 ', '6 ', '7 ',
            '8 ', '9 ', '+ ', '/ '
   };
   private static final char S_BASE64PAD = 61;
   private static final byte S_DECODETABLE[];

   static
   {
            S_DECODETABLE = new byte;
            for(int i = 0; i < S_DECODETABLE.length; i++)
                     S_DECODETABLE = 127;

            for(int i = 0; i < S_BASE64CHAR.length; i++)
                     S_DECODETABLE] = (byte)i;

   }
}

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java版变异base64 请高人转换成AU3