/*
* @(#)CharToByteISO2022JP.java 1.22 06/10/10
*
* Copyright 1990-2008 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program 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.
*
* 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 version 2 for more details (a copy is
* included at /legal/license.txt).
*
* 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 or visit www.sun.com if you need additional
* information or have any questions.
*
*/
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;
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;
// 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) {
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;
currentMode = 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;
currentMode = 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;
currentMode = 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;
currentMode = 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;
currentMode = 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) {
outputByte = subBytes;
outputSize = subBytes.length;
} else {
badInputLength = 1;
throw new UnknownCharacterException();
}
}
}
}
// Is there room in the output buffer?
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;
}
// 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";
}
}