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/*
* Copyright 2006 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package sun.io;
import sun.nio.cs.ext.IBM933;
public class ByteToCharCp834 extends ByteToCharDBCS_ONLY_EBCDIC {
public String getCharacterEncoding() {
return "Cp834";
}
public ByteToCharCp834() {
super();
super.mask1 = 0xFFF0;
super.mask2 = 0x000F;
super.shift = 4;
super.index1 = IBM933.getDecoderIndex1();
super.index2 = IBM933.getDecoderIndex2();
}
}
abstract class ByteToCharDBCS_ONLY_EBCDIC extends ByteToCharConverter {
private boolean savedBytePresent;
private byte savedByte;
protected short index1[];
protected String index2;
protected int mask1;
protected int mask2;
protected int shift;
public ByteToCharDBCS_ONLY_EBCDIC() {
super();
savedBytePresent = false;
}
public int flush(char [] output, int outStart, int outEnd)
throws MalformedInputException
{
if (savedBytePresent) {
reset();
badInputLength = 0;
throw new MalformedInputException();
}
reset();
return 0;
}
/**
* Character conversion
*/
public int convert(byte[] input, int inOff, int inEnd,
char[] output, int outOff, int outEnd)
throws UnknownCharacterException, MalformedInputException,
ConversionBufferFullException
{
int inputSize;
char outputChar = '\uFFFD';
charOff = outOff;
byteOff = inOff;
while(byteOff < inEnd) {
int byte1, byte2;
int v;
if (!savedBytePresent) {
byte1 = input[byteOff] & 0xff;
inputSize = 1;
} else {
byte1 = savedByte;
savedBytePresent = false;
inputSize = 0;
}
// valid range of 1st bytes
if (byte1 < 0x40 || byte1 > 0xfe) {
badInputLength = 1;
throw new MalformedInputException();
}
if (byteOff + inputSize >= inEnd) {
// We have been split in the middle if a character
// save the first byte for next time around
savedByte = (byte)byte1;
savedBytePresent = true;
byteOff += inputSize;
break;
}
byte2 = input[byteOff+inputSize] & 0xff;
inputSize++;
// validate the pair of bytes
if ((byte1 != 0x40 || byte2 != 0x40) &&
(byte2 < 0x41 || byte2 > 0xfe)) {
badInputLength = 2;
throw new MalformedInputException();
}
// Lookup in the two level index
v = byte1 * 256 + byte2;
outputChar = index2.charAt(index1[((v & mask1) >> shift)]
+ (v & mask2));
if (outputChar == '\uFFFD') {
if (subMode)
outputChar = subChars[0];
else {
badInputLength = inputSize;
throw new UnknownCharacterException();
}
}
if (charOff >= outEnd)
throw new ConversionBufferFullException();
output[charOff++] = outputChar;
byteOff += inputSize;
}
return charOff - outOff;
}
/**
* Resets the converter.
*/
public void reset() {
charOff = byteOff = 0;
savedBytePresent = false;
}
}
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