com.ximpleware.transcode.ASCII_Coder Maven / Gradle / Ivy
/*
* Copyright (C) 2002-2012 XimpleWare, [email protected]
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
package com.ximpleware.transcode;
import com.ximpleware.TranscodeException;
import java.io.*;
public class ASCII_Coder {
/**
*
* @param ch
* @return
* @throws TranscodeException
*
*/
public static final int getLen(int ch) throws TranscodeException{
if (ch>=128)
throw new TranscodeException("Invalid UCS char for ASCII format");
else
return 1;
}
/**
*
* @param input
* @param offset
* @return a 64-bit integer upper 32 bits is offset value for
* lower 32 bits is the UCS char
*
*/
public static final long decode(byte[] input, int offset ){
long l = input[offset];
return (((long)(offset+1))<<32) | l ;
}
/**
*
* @param output
* @param offset
* @param ch
* @return
*
*/
public static final int encode(byte[] output, int offset, int ch ){
output[offset] = (byte) ch;
return offset+1;
}
/**
*
* @param os
* @param offset
* @param ch
*
*/
public static final void encodeAndWrite(OutputStream os, int ch)
throws IOException, TranscodeException {
if (ch>=128)
throw new TranscodeException("Invalid UCS char for ASCII format");
os.write(ch);
}
}