Java example source code file (ISO2022_JP.java)
The ISO2022_JP.java Java example source code
/*
* Copyright (c) 2002, 2012, 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.nio.cs.ext;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.nio.charset.CodingErrorAction;
import sun.nio.cs.HistoricallyNamedCharset;
import sun.nio.cs.Surrogate;
import sun.nio.cs.US_ASCII;
import static sun.nio.cs.CharsetMapping.*;
/*
* Implementation notes:
*
* (1)"Standard based" (ASCII, JIS_X_0201 and JIS_X_0208) ISO2022-JP charset
* is provided by the base implementation of this class.
*
* Three Microsoft ISO2022-JP variants, MS50220, MS50221 and MSISO2022JP
* are provided via subclasses.
*
* (2)MS50220 and MS50221 are assumed to work the same way as Microsoft
* CP50220 and CP50221's 7-bit implementation works by using CP5022X
* specific JIS0208 and JIS0212 mapping tables (generated via Microsoft's
* MultiByteToWideChar/WideCharToMultiByte APIs). The only difference
* between these 2 classes is that MS50220 does not support singlebyte
* halfwidth kana (Uff61-Uff9f) shiftin mechanism when "encoding", instead
* these halfwidth kana characters are converted to their fullwidth JIS0208
* counterparts.
*
* The difference between the standard JIS_X_0208 and JIS_X_0212 mappings
* and the CP50220/50221 specific are
*
* 0208 mapping:
* 1)0x213d <-> U2015 (compared to U2014)
* 2)One way mappings for 5 characters below
* u2225 (ms) -> 0x2142 <-> u2016 (jis)
* uff0d (ms) -> 0x215d <-> u2212 (jis)
* uffe0 (ms) -> 0x2171 <-> u00a2 (jis)
* uffe1 (ms) -> 0x2172 <-> u00a3 (jis)
* uffe2 (ms) -> 0x224c <-> u00ac (jis)
* //should consider 0xff5e -> 0x2141 <-> U301c?
* 3)NEC Row13 0x2d21-0x2d79
* 4)85-94 ku <-> UE000,UE3AB (includes NEC selected
* IBM kanji in 89-92ku)
* 5)UFF61-UFF9f -> Fullwidth 0208 KANA
*
* 0212 mapping:
* 1)0x2237 <-> UFF5E (Fullwidth Tilde)
* 2)0x2271 <-> U2116 (Numero Sign)
* 3)85-94 ku <-> UE3AC - UE757
*
* (3)MSISO2022JP uses a JIS0208 mapping generated from MS932DB.b2c
* and MS932DB.c2b by converting the SJIS codepoints back to their
* JIS0208 counterparts. With the exception of
*
* (a)Codepoints with a resulting JIS0208 codepoints beyond 0x7e00 are
* dropped (this includs the IBM Extended Kanji/Non-kanji from 0x9321
* to 0x972c)
* (b)The Unicode codepoints that the IBM Extended Kanji/Non-kanji are
* mapped to (in MS932) are mapped back to NEC selected IBM Kanji/
* Non-kanji area at 0x7921-0x7c7e.
*
* Compared to JIS_X_0208 mapping, this MS932 based mapping has
* (a)different mappings for 7 JIS codepoints
* 0x213d <-> U2015
* 0x2141 <-> UFF5E
* 0x2142 <-> U2225
* 0x215d <-> Uff0d
* 0x2171 <-> Uffe0
* 0x2172 <-> Uffe1
* 0x224c <-> Uffe2
* (b)added one-way c2b mappings for
* U00b8 -> 0x2124
* U00b7 -> 0x2126
* U00af -> 0x2131
* U00ab -> 0x2263
* U00bb -> 0x2264
* U3094 -> 0x2574
* U00b5 -> 0x264c
* (c)NEC Row 13
* (d)NEC selected IBM extended Kanji/Non-kanji
* These codepoints are mapped to the same Unicode codepoints as
* the MS932 does, while MS50220/50221 maps them to the Unicode
* private area.
*
* # There is also an interesting difference when compared to MS5022X
* 0208 mapping for JIS codepoint "0x2D60", MS932 maps it to U301d
* but MS5022X maps it to U301e, obvious MS5022X is wrong, but...
*/
public class ISO2022_JP
extends Charset
implements HistoricallyNamedCharset
{
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 JISX0212_1990 = 4; // ESC $ ( D
private static final int JISX0201_1976_KANA = 5; // ESC ( I
private static final int SHIFTOUT = 6;
private static final int ESC = 0x1b;
private static final int SO = 0x0e;
private static final int SI = 0x0f;
public ISO2022_JP() {
super("ISO-2022-JP",
ExtendedCharsets.aliasesFor("ISO-2022-JP"));
}
protected ISO2022_JP(String canonicalName,
String[] aliases) {
super(canonicalName, aliases);
}
public String historicalName() {
return "ISO2022JP";
}
public boolean contains(Charset cs) {
return ((cs instanceof JIS_X_0201)
|| (cs instanceof US_ASCII)
|| (cs instanceof JIS_X_0208)
|| (cs instanceof ISO2022_JP));
}
public CharsetDecoder newDecoder() {
return new Decoder(this);
}
public CharsetEncoder newEncoder() {
return new Encoder(this);
}
protected boolean doSBKANA() {
return true;
}
static class Decoder extends CharsetDecoder
implements DelegatableDecoder {
final static DoubleByte.Decoder DEC0208 =
(DoubleByte.Decoder)new JIS_X_0208().newDecoder();
private int currentState;
private int previousState;
private DoubleByte.Decoder dec0208;
private DoubleByte.Decoder dec0212;
private Decoder(Charset cs) {
this(cs, DEC0208, null);
}
protected Decoder(Charset cs,
DoubleByte.Decoder dec0208,
DoubleByte.Decoder dec0212) {
super(cs, 0.5f, 1.0f);
this.dec0208 = dec0208;
this.dec0212 = dec0212;
currentState = ASCII;
previousState = ASCII;
}
public void implReset() {
currentState = ASCII;
previousState = ASCII;
}
private CoderResult decodeArrayLoop(ByteBuffer src,
CharBuffer dst)
{
int inputSize = 0;
int b1 = 0, b2 = 0, b3 = 0, b4 = 0;
char c = UNMAPPABLE_DECODING;
byte[] sa = src.array();
int sp = src.arrayOffset() + src.position();
int sl = src.arrayOffset() + src.limit();
assert (sp <= sl);
sp = (sp <= sl ? sp : sl);
char[] da = dst.array();
int dp = dst.arrayOffset() + dst.position();
int dl = dst.arrayOffset() + dst.limit();
assert (dp <= dl);
dp = (dp <= dl ? dp : dl);
try {
while (sp < sl) {
b1 = sa[sp] & 0xff;
inputSize = 1;
if ((b1 & 0x80) != 0) {
return CoderResult.malformedForLength(inputSize);
}
if (b1 == ESC || b1 == SO || b1 == SI) {
if (b1 == ESC) {
if (sp + inputSize + 2 > sl)
return CoderResult.UNDERFLOW;
b2 = sa[sp + inputSize++] & 0xff;
if (b2 == '(') {
b3 = sa[sp + inputSize++] & 0xff;
if (b3 == 'B'){
currentState = ASCII;
} else if (b3 == 'J'){
currentState = JISX0201_1976;
} else if (b3 == 'I'){
currentState = JISX0201_1976_KANA;
} else {
return CoderResult.malformedForLength(inputSize);
}
} else if (b2 == '$'){
b3 = sa[sp + inputSize++] & 0xff;
if (b3 == '@'){
currentState = JISX0208_1978;
} else if (b3 == 'B'){
currentState = JISX0208_1983;
} else if (b3 == '(' && dec0212 != null) {
if (sp + inputSize + 1 > sl)
return CoderResult.UNDERFLOW;
b4 = sa[sp + inputSize++] & 0xff;
if (b4 == 'D') {
currentState = JISX0212_1990;
} else {
return CoderResult.malformedForLength(inputSize);
}
} else {
return CoderResult.malformedForLength(inputSize);
}
} else {
return CoderResult.malformedForLength(inputSize);
}
} else if (b1 == SO) {
previousState = currentState;
currentState = SHIFTOUT;
} else if (b1 == SI) {
currentState = previousState;
}
sp += inputSize;
continue;
}
if (dp + 1 > dl)
return CoderResult.OVERFLOW;
switch (currentState){
case ASCII:
da[dp++] = (char)(b1 & 0xff);
break;
case JISX0201_1976:
switch (b1) {
case 0x5c: // Yen/tilde substitution
da[dp++] = '\u00a5';
break;
case 0x7e:
da[dp++] = '\u203e';
break;
default:
da[dp++] = (char)b1;
break;
}
break;
case JISX0208_1978:
case JISX0208_1983:
if (sp + inputSize + 1 > sl)
return CoderResult.UNDERFLOW;
b2 = sa[sp + inputSize++] & 0xff;
c = dec0208.decodeDouble(b1,b2);
if (c == UNMAPPABLE_DECODING)
return CoderResult.unmappableForLength(inputSize);
da[dp++] = c;
break;
case JISX0212_1990:
if (sp + inputSize + 1 > sl)
return CoderResult.UNDERFLOW;
b2 = sa[sp + inputSize++] & 0xff;
c = dec0212.decodeDouble(b1,b2);
if (c == UNMAPPABLE_DECODING)
return CoderResult.unmappableForLength(inputSize);
da[dp++] = c;
break;
case JISX0201_1976_KANA:
case SHIFTOUT:
if (b1 > 0x60) {
return CoderResult.malformedForLength(inputSize);
}
da[dp++] = (char)(b1 + 0xff40);
break;
}
sp += inputSize;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
private CoderResult decodeBufferLoop(ByteBuffer src,
CharBuffer dst)
{
int mark = src.position();
int b1 = 0, b2 = 0, b3 = 0, b4=0;
char c = UNMAPPABLE_DECODING;
int inputSize = 0;
try {
while (src.hasRemaining()) {
b1 = src.get() & 0xff;
inputSize = 1;
if ((b1 & 0x80) != 0)
return CoderResult.malformedForLength(inputSize);
if (b1 == ESC || b1 == SO || b1 == SI) {
if (b1 == ESC) { // ESC
if (src.remaining() < 2)
return CoderResult.UNDERFLOW;
b2 = src.get() & 0xff;
inputSize++;
if (b2 == '(') {
b3 = src.get() & 0xff;
inputSize++;
if (b3 == 'B'){
currentState = ASCII;
} else if (b3 == 'J'){
currentState = JISX0201_1976;
} else if (b3 == 'I'){
currentState = JISX0201_1976_KANA;
} else {
return CoderResult.malformedForLength(inputSize);
}
} else if (b2 == '$'){
b3 = src.get() & 0xff;
inputSize++;
if (b3 == '@'){
currentState = JISX0208_1978;
} else if (b3 == 'B'){
currentState = JISX0208_1983;
} else if (b3 == '(' && dec0212 != null) {
if (!src.hasRemaining())
return CoderResult.UNDERFLOW;
b4 = src.get() & 0xff;
inputSize++;
if (b4 == 'D') {
currentState = JISX0212_1990;
} else {
return CoderResult.malformedForLength(inputSize);
}
} else {
return CoderResult.malformedForLength(inputSize);
}
} else {
return CoderResult.malformedForLength(inputSize);
}
} else if (b1 == SO) {
previousState = currentState;
currentState = SHIFTOUT;
} else if (b1 == SI) { // shift back in
currentState = previousState;
}
mark += inputSize;
continue;
}
if (!dst.hasRemaining())
return CoderResult.OVERFLOW;
switch (currentState){
case ASCII:
dst.put((char)(b1 & 0xff));
break;
case JISX0201_1976:
switch (b1) {
case 0x5c: // Yen/tilde substitution
dst.put('\u00a5');
break;
case 0x7e:
dst.put('\u203e');
break;
default:
dst.put((char)b1);
break;
}
break;
case JISX0208_1978:
case JISX0208_1983:
if (!src.hasRemaining())
return CoderResult.UNDERFLOW;
b2 = src.get() & 0xff;
inputSize++;
c = dec0208.decodeDouble(b1,b2);
if (c == UNMAPPABLE_DECODING)
return CoderResult.unmappableForLength(inputSize);
dst.put(c);
break;
case JISX0212_1990:
if (!src.hasRemaining())
return CoderResult.UNDERFLOW;
b2 = src.get() & 0xff;
inputSize++;
c = dec0212.decodeDouble(b1,b2);
if (c == UNMAPPABLE_DECODING)
return CoderResult.unmappableForLength(inputSize);
dst.put(c);
break;
case JISX0201_1976_KANA:
case SHIFTOUT:
if (b1 > 0x60) {
return CoderResult.malformedForLength(inputSize);
}
dst.put((char)(b1 + 0xff40));
break;
}
mark += inputSize;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(mark);
}
}
// Make some protected methods public for use by JISAutoDetect
public CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) {
if (src.hasArray() && dst.hasArray())
return decodeArrayLoop(src, dst);
else
return decodeBufferLoop(src, dst);
}
public CoderResult implFlush(CharBuffer out) {
return super.implFlush(out);
}
}
static class Encoder extends CharsetEncoder {
final static DoubleByte.Encoder ENC0208 =
(DoubleByte.Encoder)new JIS_X_0208().newEncoder();
private static byte[] repl = { (byte)0x21, (byte)0x29 };
private int currentMode = ASCII;
private int replaceMode = JISX0208_1983;
private DoubleByte.Encoder enc0208;
private DoubleByte.Encoder enc0212;
private boolean doSBKANA;
private Encoder(Charset cs) {
this(cs, ENC0208, null, true);
}
Encoder(Charset cs,
DoubleByte.Encoder enc0208,
DoubleByte.Encoder enc0212,
boolean doSBKANA) {
super(cs, 4.0f, (enc0212 != null)? 9.0f : 8.0f, repl);
this.enc0208 = enc0208;
this.enc0212 = enc0212;
this.doSBKANA = doSBKANA;
}
protected int encodeSingle(char inputChar) {
return -1;
}
protected void implReset() {
currentMode = ASCII;
}
protected void implReplaceWith(byte[] newReplacement) {
/* It's almost impossible to decide which charset they belong
to. The best thing we can do here is to "guess" based on
the length of newReplacement.
*/
if (newReplacement.length == 1) {
replaceMode = ASCII;
} else if (newReplacement.length == 2) {
replaceMode = JISX0208_1983;
}
}
protected CoderResult implFlush(ByteBuffer out) {
if (currentMode != ASCII) {
if (out.remaining() < 3)
return CoderResult.OVERFLOW;
out.put((byte)0x1b);
out.put((byte)0x28);
out.put((byte)0x42);
currentMode = ASCII;
}
return CoderResult.UNDERFLOW;
}
public boolean canEncode(char c) {
return ((c <= '\u007F') ||
(c >= 0xFF61 && c <= 0xFF9F) ||
(c == '\u00A5') ||
(c == '\u203E') ||
enc0208.canEncode(c) ||
(enc0212!=null && enc0212.canEncode(c)));
}
private final Surrogate.Parser sgp = new Surrogate.Parser();
private CoderResult encodeArrayLoop(CharBuffer src,
ByteBuffer dst)
{
char[] sa = src.array();
int sp = src.arrayOffset() + src.position();
int sl = src.arrayOffset() + src.limit();
assert (sp <= sl);
sp = (sp <= sl ? sp : sl);
byte[] da = dst.array();
int dp = dst.arrayOffset() + dst.position();
int dl = dst.arrayOffset() + dst.limit();
assert (dp <= dl);
dp = (dp <= dl ? dp : dl);
try {
while (sp < sl) {
char c = sa[sp];
if (c <= '\u007F') {
if (currentMode != ASCII) {
if (dl - dp < 3)
return CoderResult.OVERFLOW;
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x28;
da[dp++] = (byte)0x42;
currentMode = ASCII;
}
if (dl - dp < 1)
return CoderResult.OVERFLOW;
da[dp++] = (byte)c;
} else if (c >= 0xff61 && c <= 0xff9f && doSBKANA) {
//a single byte kana
if (currentMode != JISX0201_1976_KANA) {
if (dl - dp < 3)
return CoderResult.OVERFLOW;
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x28;
da[dp++] = (byte)0x49;
currentMode = JISX0201_1976_KANA;
}
if (dl - dp < 1)
return CoderResult.OVERFLOW;
da[dp++] = (byte)(c - 0xff40);
} else if (c == '\u00A5' || c == '\u203E') {
//backslash or tilde
if (currentMode != JISX0201_1976) {
if (dl - dp < 3)
return CoderResult.OVERFLOW;
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x28;
da[dp++] = (byte)0x4a;
currentMode = JISX0201_1976;
}
if (dl - dp < 1)
return CoderResult.OVERFLOW;
da[dp++] = (c == '\u00A5')?(byte)0x5C:(byte)0x7e;
} else {
int index = enc0208.encodeChar(c);
if (index != UNMAPPABLE_ENCODING) {
if (currentMode != JISX0208_1983) {
if (dl - dp < 3)
return CoderResult.OVERFLOW;
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x24;
da[dp++] = (byte)0x42;
currentMode = JISX0208_1983;
}
if (dl - dp < 2)
return CoderResult.OVERFLOW;
da[dp++] = (byte)(index >> 8);
da[dp++] = (byte)(index & 0xff);
} else if (enc0212 != null &&
(index = enc0212.encodeChar(c)) != UNMAPPABLE_ENCODING) {
if (currentMode != JISX0212_1990) {
if (dl - dp < 4)
return CoderResult.OVERFLOW;
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x24;
da[dp++] = (byte)0x28;
da[dp++] = (byte)0x44;
currentMode = JISX0212_1990;
}
if (dl - dp < 2)
return CoderResult.OVERFLOW;
da[dp++] = (byte)(index >> 8);
da[dp++] = (byte)(index & 0xff);
} else {
if (Character.isSurrogate(c) && sgp.parse(c, sa, sp, sl) < 0)
return sgp.error();
if (unmappableCharacterAction()
== CodingErrorAction.REPLACE
&& currentMode != replaceMode) {
if (dl - dp < 3)
return CoderResult.OVERFLOW;
if (replaceMode == ASCII) {
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x28;
da[dp++] = (byte)0x42;
} else {
da[dp++] = (byte)0x1b;
da[dp++] = (byte)0x24;
da[dp++] = (byte)0x42;
}
currentMode = replaceMode;
}
if (Character.isSurrogate(c))
return sgp.unmappableResult();
return CoderResult.unmappableForLength(1);
}
}
sp++;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
private CoderResult encodeBufferLoop(CharBuffer src,
ByteBuffer dst)
{
int mark = src.position();
try {
while (src.hasRemaining()) {
char c = src.get();
if (c <= '\u007F') {
if (currentMode != ASCII) {
if (dst.remaining() < 3)
return CoderResult.OVERFLOW;
dst.put((byte)0x1b);
dst.put((byte)0x28);
dst.put((byte)0x42);
currentMode = ASCII;
}
if (dst.remaining() < 1)
return CoderResult.OVERFLOW;
dst.put((byte)c);
} else if (c >= 0xff61 && c <= 0xff9f && doSBKANA) {
//Is it a single byte kana?
if (currentMode != JISX0201_1976_KANA) {
if (dst.remaining() < 3)
return CoderResult.OVERFLOW;
dst.put((byte)0x1b);
dst.put((byte)0x28);
dst.put((byte)0x49);
currentMode = JISX0201_1976_KANA;
}
if (dst.remaining() < 1)
return CoderResult.OVERFLOW;
dst.put((byte)(c - 0xff40));
} else if (c == '\u00a5' || c == '\u203E') {
if (currentMode != JISX0201_1976) {
if (dst.remaining() < 3)
return CoderResult.OVERFLOW;
dst.put((byte)0x1b);
dst.put((byte)0x28);
dst.put((byte)0x4a);
currentMode = JISX0201_1976;
}
if (dst.remaining() < 1)
return CoderResult.OVERFLOW;
dst.put((c == '\u00A5')?(byte)0x5C:(byte)0x7e);
} else {
int index = enc0208.encodeChar(c);
if (index != UNMAPPABLE_ENCODING) {
if (currentMode != JISX0208_1983) {
if (dst.remaining() < 3)
return CoderResult.OVERFLOW;
dst.put((byte)0x1b);
dst.put((byte)0x24);
dst.put((byte)0x42);
currentMode = JISX0208_1983;
}
if (dst.remaining() < 2)
return CoderResult.OVERFLOW;
dst.put((byte)(index >> 8));
dst.put((byte)(index & 0xff));
} else if (enc0212 != null &&
(index = enc0212.encodeChar(c)) != UNMAPPABLE_ENCODING) {
if (currentMode != JISX0212_1990) {
if (dst.remaining() < 4)
return CoderResult.OVERFLOW;
dst.put((byte)0x1b);
dst.put((byte)0x24);
dst.put((byte)0x28);
dst.put((byte)0x44);
currentMode = JISX0212_1990;
}
if (dst.remaining() < 2)
return CoderResult.OVERFLOW;
dst.put((byte)(index >> 8));
dst.put((byte)(index & 0xff));
} else {
if (Character.isSurrogate(c) && sgp.parse(c, src) < 0)
return sgp.error();
if (unmappableCharacterAction() == CodingErrorAction.REPLACE
&& currentMode != replaceMode) {
if (dst.remaining() < 3)
return CoderResult.OVERFLOW;
if (replaceMode == ASCII) {
dst.put((byte)0x1b);
dst.put((byte)0x28);
dst.put((byte)0x42);
} else {
dst.put((byte)0x1b);
dst.put((byte)0x24);
dst.put((byte)0x42);
}
currentMode = replaceMode;
}
if (Character.isSurrogate(c))
return sgp.unmappableResult();
return CoderResult.unmappableForLength(1);
}
}
mark++;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(mark);
}
}
protected CoderResult encodeLoop(CharBuffer src,
ByteBuffer dst)
{
if (src.hasArray() && dst.hasArray())
return encodeArrayLoop(src, dst);
else
return encodeBufferLoop(src, dst);
}
}
}
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