/*
* Copyright (c) 1996, 1997, 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.io;
public class ByteToCharISO2022JP extends ByteToCharJIS0208 {
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 static final int SHIFTOUT = 5; // SO (0x0e)
private int currentState;
private int savedSize;
private byte[] savedBytes;
public ByteToCharISO2022JP() {
super();
savedBytes = new byte[2];
currentState = ASCII;
savedSize = 0;
}
public int flush(char [] output, int outStart, int outEnd)
throws MalformedInputException
{
if (savedSize != 0) {
savedSize = 0;
currentState = ASCII;
badInputLength = 0;
throw new MalformedInputException();
}
byteOff = charOff = 0;
return 0;
}
/**
* Character conversion
*/
public int convert(byte[] input, int inOff, int inEnd,
char[] output, int outOff, int outEnd)
throws UnknownCharacterException, MalformedInputException,
ConversionBufferFullException
{
int previousState = ASCII;
int inputSize = 0;
char outputChar = '\uFFFD';
// readOff keeps the actual buffer's pointer.
// byteOff keeps original buffer's pointer.
int readOff = byteOff = inOff;
if (savedSize != 0) {
if (savedBytes[0] == 0x1b) { // ESC
if ((savedSize == 2 &&
(savedBytes[1] == 0x28 &&
input[0] != 'B' &&
input[0] != 'J' &&
input[0] != 'I') &&
(savedBytes[1] == 0x24 &&
input[0] != '@' &&
input[0] != 'B')) ||
((savedSize == 1) &&
(input[0] != 0x28 &&
input[0] != 0x24))) {
badInputLength = 0;
throw new MalformedInputException();
}
if ((inEnd - inOff) == 1 && savedSize == 1 &&
savedBytes[0] == 0x1b) {
savedSize = 2;
savedBytes[1] = input[0];
byteOff++;
return 0;
}
}
byte[] newBuf = new byte[inEnd - inOff + savedSize];
for (int i = 0; i < savedSize; i++) {
newBuf[i] = savedBytes[i];
}
System.arraycopy(input, inOff, newBuf, savedSize, inEnd - inOff);
byteOff -= savedSize;
input = newBuf;
inOff = 0;
inEnd = newBuf.length;
savedSize = 0;
}
charOff = outOff;
readOff = inOff;
while(readOff < inEnd) {
int byte1, byte2, byte3;
boolean noOutput = false;
// Is there room in the output buffer for the result?
if (charOff >= outEnd) {
throw new ConversionBufferFullException();
}
// Get the input byte
byte1 = input[readOff] & 0xFF;
inputSize = 1;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
// Is this a escape sequence?
while (byte1 == 0x1b || byte1 == 0x0e || byte1 == 0x0f) {
if (byte1 == 0x1b){ // ESC
if (readOff + inputSize + 1 >= inEnd) {
if (readOff + inputSize >= inEnd) {
savedSize = 1;
savedBytes[0] = (byte)byte1;
} else {
savedSize = 2;
savedBytes[0] = (byte)byte1;
savedBytes[1] = (byte)input[readOff + inputSize];
inputSize++;
}
break;
}
byte2 = input[readOff + inputSize] & 0xFF;
inputSize++;
if ((byte2 & (byte)0x80) != 0){
badInputLength = 2;
throw new MalformedInputException();
}
if (byte2 == 0x28){
byte3 = input[readOff + inputSize] & 0xFF;
inputSize++;
if (byte3 == 'B'){
currentState = ASCII;
} else if (byte3 == 'J'){
currentState = JISX0201_1976;
} else if (byte3 == 'I'){
currentState = JISX0201_1976_KANA;
} else {
// illegal ESC sequence
badInputLength = 3;
throw new MalformedInputException();
}
} else if (byte2 == '$'){
byte3 = input[readOff + inputSize] & 0xFF;
inputSize++;
if ((byte3 & (byte)0x80) != 0){
badInputLength = 3;
throw new MalformedInputException();
}
if (byte3 == '@'){
currentState = JISX0208_1978;
} else if (byte3 == 'B'){
currentState = JISX0208_1983;
} else {
// illegal ESC sequence
badInputLength = 3;
throw new MalformedInputException();
}
} else {
// illegal ESC sequence
badInputLength = 2;
throw new MalformedInputException();
}
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
} else {
byte1 = input[readOff + inputSize];
inputSize++;
}
} else if (byte1 == 0x0e){ // shift out for one byte kana
previousState = currentState;
currentState = SHIFTOUT;
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
}
byte1 = input[readOff + inputSize];
inputSize++;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
} else if (byte1 == 0x0f){ // shift in for previous mode
currentState = previousState;
if (readOff + inputSize >= inEnd) {
noOutput = true;
break;
}
byte1 = input[readOff + inputSize];
inputSize++;
if ((byte1 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
}
}
if (noOutput || savedSize != 0) {
byteOff += inputSize;
break;
}
noOutput = false;
switch (currentState){
case ASCII:
outputChar = (char)(byte1 & 0xff);
break;
case JISX0201_1976:
switch (byte1) {
case 0x5c:
outputChar = '\u00a5';
break;
case 0x7e:
outputChar = '\u203e';
break;
default:
outputChar = (char)byte1;
break;
}
break;
case JISX0208_1978:
case JISX0208_1983:
if (readOff + inputSize >= inEnd) {
savedSize = 1;
savedBytes[0] = (byte)byte1;
break;
}
byte2 = input[readOff + inputSize] & 0xff;
inputSize++;
if ((byte2 & (byte)0x80) != 0){
badInputLength = 1;
throw new MalformedInputException();
}
// jisx0208Chars table convert FULLWIDTH_REVERSE_SOLIDUS
// 0x2140 to REVERSE_SOLIDUS (BACKSLASH) 0x5c.
// This behavior causes problem because
// 0x5c is special escape character for java.
if (byte1 == 0x21 && byte2 == 0x40) {
outputChar = '\uFF3C';
} else {
try {
outputChar = getUnicode(byte1, byte2);
} catch (ArrayIndexOutOfBoundsException e) {
outputChar = '\uFFFD';
}
}
break;
case JISX0201_1976_KANA:
case SHIFTOUT:
if (byte1 > 0x60) {
badInputLength = 1;
throw new MalformedInputException();
}
outputChar = (char)(byte1 + 0xff40);
break;
}
if (savedSize != 0) {
byteOff += inputSize;
break;
}
if (outputChar == '\uFFFD') {
if (subMode)
outputChar = subChars[0];
else {
badInputLength = inputSize;
throw new UnknownCharacterException();
}
}
readOff += inputSize;
byteOff += inputSize;
output[charOff++] = outputChar;
}
return charOff - outOff;
}
public void reset() {
byteOff = charOff = 0;
currentState = ASCII;
savedSize = 0;
}
public String getCharacterEncoding() {
return "ISO2022JP";
}
}