/*
* Copyright (c) 1996, 1999, Oracle and/or its affiliates. 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package sun.io;
import java.io.*;
public class CharToByteISO2022JP extends CharToByteJIS0208 {
private static final int ASCII = 0; // ESC ( B
private static final int JISX0201_1976 = 1; // ESC ( J
private static final int JISX0208_1978 = 2; // ESC $ @
private static final int JISX0208_1983 = 3; // ESC $ B
private static final int JISX0201_1976_KANA = 4; // ESC ( I
private char highHalfZoneCode;
private boolean flushed = true;
// JIS is state full encoding, so currentMode keep the
// current codeset
private int currentMode = ASCII;
/**
* Bytes for substitute for unmappable input.
*/
// XXX: Assumes subBytes are ASCII string. Need to change Escape sequence
// for other character sets.
protected byte[] subBytesEscape = { (byte)0x1b, (byte)0x28, (byte)0x42 }; // ESC ( B
protected int subBytesMode = ASCII;
public int flush(byte[] output, int outStart, int outEnd)
throws MalformedInputException, ConversionBufferFullException
{
if (highHalfZoneCode != 0) {
highHalfZoneCode = 0;
badInputLength = 0;
throw new MalformedInputException();
}
if (!flushed && (currentMode != ASCII)) {
if (outEnd - outStart < 3) {
throw new ConversionBufferFullException();
}
output[outStart] = (byte)0x1b;
output[outStart + 1] = (byte)0x28;
output[outStart + 2] = (byte)0x42;
byteOff += 3;
byteOff = charOff = 0;
flushed = true;
currentMode = ASCII;
return 3;
}
return 0;
}
public int convert(char[] input, int inOff, int inEnd,
byte[] output, int outOff, int outEnd)
throws MalformedInputException, UnknownCharacterException,
ConversionBufferFullException
{
char inputChar; // Input character to be converted
int inputSize; // Size of the input
int outputSize; // Size of the output
// Buffer for output bytes
byte[] tmpArray = new byte[6];
byte[] outputByte;
flushed = false;
// Make copies of input and output indexes
charOff = inOff;
byteOff = outOff;
if (highHalfZoneCode != 0) {
inputChar = highHalfZoneCode;
highHalfZoneCode = 0;
if (input[inOff] >= 0xdc00 && input[inOff] <= 0xdfff) {
// This is legal UTF16 sequence.
badInputLength = 1;
throw new UnknownCharacterException();
} else {
// This is illegal UTF16 sequence.
badInputLength = 0;
throw new MalformedInputException();
}
}
// Loop until we run out of input
while(charOff < inEnd) {
outputByte = tmpArray;
int newMode = currentMode; // Trace character mode changing
// Get the input character
inputChar = input[charOff];
inputSize = 1;
outputSize = 1;
// Is this a high surrogate?
if(inputChar >= '\uD800' && inputChar <= '\uDBFF') {
// Is this the last character of the input?
if (charOff + 1 >= inEnd) {
highHalfZoneCode = inputChar;
break;
}
// Is there a low surrogate following?
inputChar = input[charOff + 1];
if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
// We have a valid surrogate pair. Too bad we don't do
// surrogates. Is substitution enabled?
if (subMode) {
if (currentMode != subBytesMode) {
System.arraycopy(subBytesEscape, 0, outputByte, 0,
subBytesEscape.length);
outputSize = subBytesEscape.length;
System.arraycopy(subBytes, 0, outputByte,
outputSize, subBytes.length);
outputSize += subBytes.length;
newMode = subBytesMode;
} else {
outputByte = subBytes;
outputSize = subBytes.length;
}
inputSize = 2;
} else {
badInputLength = 2;
throw new UnknownCharacterException();
}
} else {
// We have a malformed surrogate pair
badInputLength = 1;
throw new MalformedInputException();
}
}
// Is this an unaccompanied low surrogate?
else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
badInputLength = 1;
throw new MalformedInputException();
} else {
// Not part of a surrogate
// Does this map to the Roman range?
if (inputChar <= '\u007F') {
if (currentMode != ASCII) {
outputByte[0] = (byte)0x1b;
outputByte[1] = (byte)0x28;
outputByte[2] = (byte)0x42;
outputByte[3] = (byte)inputChar;
outputSize = 4;
newMode = ASCII;
} else {
outputByte[0] = (byte)inputChar;
outputSize = 1;
}
}
// Is it a single byte kana?
else if (inputChar >= 0xFF61 && inputChar <= 0xFF9F) {
if (currentMode != JISX0201_1976_KANA) {
outputByte[0] = (byte)0x1b;
outputByte[1] = (byte)0x28;
outputByte[2] = (byte)0x49;
outputByte[3] = (byte)(inputChar - 0xff40);
outputSize = 4;
newMode = JISX0201_1976_KANA;
} else {
outputByte[0] = (byte)(inputChar - 0xff40);
outputSize = 1;
}
}
// Is it a yen sign?
else if (inputChar == '\u00A5') {
if (currentMode != JISX0201_1976) {
outputByte[0] = (byte)0x1b;
outputByte[1] = (byte)0x28;
outputByte[2] = (byte)0x4a;
outputByte[3] = (byte)0x5c;
outputSize = 4;
newMode = JISX0201_1976;
} else {
outputByte[0] = (byte)0x5C;
outputSize = 1;
}
}
// Is it a tilde?
else if (inputChar == '\u203E')
{
if (currentMode != JISX0201_1976) {
outputByte[0] = (byte)0x1b;
outputByte[1] = (byte)0x28;
outputByte[2] = (byte)0x4a;
outputByte[3] = (byte)0x7e;
outputSize = 4;
newMode = JISX0201_1976;
} else {
outputByte[0] = (byte)0x7e;
outputSize = 1;
}
}
// Is it a JIS-X-0208 character?
else {
int index = getNative(inputChar);
if (index != 0) {
if (currentMode != JISX0208_1983) {
outputByte[0] = (byte)0x1b;
outputByte[1] = (byte)0x24;
outputByte[2] = (byte)0x42;
outputByte[3] = (byte)(index >> 8);
outputByte[4] = (byte)(index & 0xff);
outputSize = 5;
newMode = JISX0208_1983;
} else {
outputByte[0] = (byte)(index >> 8);
outputByte[1] = (byte)(index & 0xff);
outputSize = 2;
}
}
// It doesn't map to JIS-0208!
else {
if (subMode) {
if (currentMode != subBytesMode) {
System.arraycopy(subBytesEscape, 0, outputByte, 0,
subBytesEscape.length);
outputSize = subBytesEscape.length;
System.arraycopy(subBytes, 0, outputByte,
outputSize, subBytes.length);
outputSize += subBytes.length;
newMode = subBytesMode;
} else {
outputByte = subBytes;
outputSize = subBytes.length;
}
} else {
badInputLength = 1;
throw new UnknownCharacterException();
}
}
}
}
// Is there room in the output buffer?
// XXX: The code assumes output buffer can hold at least 5 bytes,
// in this coverter case. However, there is no way for apps to
// see how many bytes will be necessary for next call.
// getMaxBytesPerChar() should be overriden in every subclass of
// CharToByteConverter and reflect real value (5 for this).
if (byteOff + outputSize > outEnd)
throw new ConversionBufferFullException();
// Put the output into the buffer
for ( int i = 0 ; i < outputSize ; i++ )
output[byteOff++] = outputByte[i];
// Advance the input pointer
charOff += inputSize;
// We can successfuly output the characters, changes
// current mode. Fix for 4251646.
currentMode = newMode;
}
// return mode ASCII at the end
if (currentMode != ASCII){
if (byteOff + 3 > outEnd)
throw new ConversionBufferFullException();
output[byteOff++] = 0x1b;
output[byteOff++] = 0x28;
output[byteOff++] = 0x42;
currentMode = ASCII;
}
// Return the length written to the output buffer
return byteOff-outOff;
}
// Reset
public void reset() {
highHalfZoneCode = 0;
byteOff = charOff = 0;
currentMode = ASCII;
}
/**
* returns the maximum number of bytes needed to convert a char
*/
public int getMaxBytesPerChar() {
return 8;
}
// Return the character set ID
public String getCharacterEncoding() {
return "ISO2022JP";
}
}