Java example source code file (EUC_JP.java)
The EUC_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 sun.nio.cs.HistoricallyNamedCharset;
import sun.nio.cs.Surrogate;
import sun.nio.cs.SingleByte;
import static sun.nio.cs.CharsetMapping.*;
public class EUC_JP
extends Charset
implements HistoricallyNamedCharset
{
public EUC_JP() {
super("EUC-JP", ExtendedCharsets.aliasesFor("EUC-JP"));
}
public String historicalName() {
return "EUC_JP";
}
public boolean contains(Charset cs) {
return ((cs.name().equals("US-ASCII"))
|| (cs instanceof JIS_X_0201)
|| (cs instanceof JIS_X_0208)
|| (cs instanceof JIS_X_0212)
|| (cs instanceof EUC_JP));
}
public CharsetDecoder newDecoder() {
return new Decoder(this);
}
public CharsetEncoder newEncoder() {
return new Encoder(this);
}
static class Decoder extends CharsetDecoder
implements DelegatableDecoder {
final static SingleByte.Decoder DEC0201 =
(SingleByte.Decoder)new JIS_X_0201().newDecoder();
final static DoubleByte.Decoder DEC0208 =
(DoubleByte.Decoder)new JIS_X_0208().newDecoder();
final static DoubleByte.Decoder DEC0212 =
(DoubleByte.Decoder)new JIS_X_0212().newDecoder();
private final SingleByte.Decoder dec0201;
private final DoubleByte.Decoder dec0208;
private final DoubleByte.Decoder dec0212;
protected Decoder(Charset cs) {
this(cs, 0.5f, 1.0f, DEC0201, DEC0208, DEC0212);
}
protected Decoder(Charset cs, float avgCpb, float maxCpb,
SingleByte.Decoder dec0201,
DoubleByte.Decoder dec0208,
DoubleByte.Decoder dec0212) {
super(cs, avgCpb, maxCpb);
this.dec0201 = dec0201;
this.dec0208 = dec0208;
this.dec0212 = dec0212;
}
protected char decodeDouble(int byte1, int byte2) {
if (byte1 == 0x8e) {
if (byte2 < 0x80)
return UNMAPPABLE_DECODING;
return dec0201.decode((byte)byte2);
}
return dec0208.decodeDouble(byte1 - 0x80, byte2 - 0x80);
}
private CoderResult decodeArrayLoop(ByteBuffer src,
CharBuffer dst)
{
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);
int b1 = 0, b2 = 0;
int inputSize = 0;
char outputChar = UNMAPPABLE_DECODING;
try {
while (sp < sl) {
b1 = sa[sp] & 0xff;
inputSize = 1;
if ((b1 & 0x80) == 0) {
outputChar = (char)b1;
} else { // Multibyte char
if (b1 == 0x8f) { // JIS0212
if (sp + 3 > sl)
return CoderResult.UNDERFLOW;
b1 = sa[sp + 1] & 0xff;
b2 = sa[sp + 2] & 0xff;
inputSize += 2;
if (dec0212 == null) // JIS02012 not supported
return CoderResult.unmappableForLength(inputSize);
outputChar = dec0212.decodeDouble(b1-0x80, b2-0x80);
} else { // JIS0201, JIS0208
if (sp + 2 > sl)
return CoderResult.UNDERFLOW;
b2 = sa[sp + 1] & 0xff;
inputSize++;
outputChar = decodeDouble(b1, b2);
}
}
if (outputChar == UNMAPPABLE_DECODING) { // can't be decoded
return CoderResult.unmappableForLength(inputSize);
}
if (dp + 1 > dl)
return CoderResult.OVERFLOW;
da[dp++] = outputChar;
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;
int inputSize = 0;
char outputChar = UNMAPPABLE_DECODING;
try {
while (src.hasRemaining()) {
b1 = src.get() & 0xff;
inputSize = 1;
if ((b1 & 0x80) == 0) {
outputChar = (char)b1;
} else { // Multibyte char
if (b1 == 0x8f) { // JIS0212
if (src.remaining() < 2)
return CoderResult.UNDERFLOW;
b1 = src.get() & 0xff;
b2 = src.get() & 0xff;
inputSize += 2;
if (dec0212 == null) // JIS02012 not supported
return CoderResult.unmappableForLength(inputSize);
outputChar = dec0212.decodeDouble(b1-0x80, b2-0x80);
} else { // JIS0201 JIS0208
if (src.remaining() < 1)
return CoderResult.UNDERFLOW;
b2 = src.get() & 0xff;
inputSize++;
outputChar = decodeDouble(b1, b2);
}
}
if (outputChar == UNMAPPABLE_DECODING) {
return CoderResult.unmappableForLength(inputSize);
}
if (dst.remaining() < 1)
return CoderResult.OVERFLOW;
dst.put(outputChar);
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 void implReset() {
super.implReset();
}
public CoderResult implFlush(CharBuffer out) {
return super.implFlush(out);
}
}
static class Encoder extends CharsetEncoder {
final static SingleByte.Encoder ENC0201 =
(SingleByte.Encoder)new JIS_X_0201().newEncoder();
final static DoubleByte.Encoder ENC0208 =
(DoubleByte.Encoder)new JIS_X_0208().newEncoder();
final static DoubleByte.Encoder ENC0212 =
(DoubleByte.Encoder)new JIS_X_0212().newEncoder();
private final Surrogate.Parser sgp = new Surrogate.Parser();
private final SingleByte.Encoder enc0201;
private final DoubleByte.Encoder enc0208;
private final DoubleByte.Encoder enc0212;
protected Encoder(Charset cs) {
this(cs, 3.0f, 3.0f, ENC0201, ENC0208, ENC0212);
}
protected Encoder(Charset cs, float avgBpc, float maxBpc,
SingleByte.Encoder enc0201,
DoubleByte.Encoder enc0208,
DoubleByte.Encoder enc0212) {
super(cs, avgBpc, maxBpc);
this.enc0201 = enc0201;
this.enc0208 = enc0208;
this.enc0212 = enc0212;
}
public boolean canEncode(char c) {
byte[] encodedBytes = new byte[3];
return encodeSingle(c, encodedBytes) != 0 ||
encodeDouble(c) != UNMAPPABLE_ENCODING;
}
protected int encodeSingle(char inputChar, byte[] outputByte) {
int b = enc0201.encode(inputChar);
if (b == UNMAPPABLE_ENCODING)
return 0;
if (b >= 0 && b < 128) {
outputByte[0] = (byte)b;
return 1;
}
outputByte[0] = (byte)0x8e;
outputByte[1] = (byte)b;
return 2;
}
protected int encodeDouble(char ch) {
int b = enc0208.encodeChar(ch);
if (b != UNMAPPABLE_ENCODING)
return b + 0x8080;
if (enc0212 != null) {
b = enc0212.encodeChar(ch);
if (b != UNMAPPABLE_ENCODING)
b += 0x8F8080;
}
return b;
}
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);
int outputSize = 0;
byte[] outputByte;
int inputSize = 0; // Size of input
byte[] tmpBuf = new byte[3];
try {
while (sp < sl) {
outputByte = tmpBuf;
char c = sa[sp];
if (Character.isSurrogate(c)) {
if (sgp.parse(c, sa, sp, sl) < 0)
return sgp.error();
return sgp.unmappableResult();
}
outputSize = encodeSingle(c, outputByte);
if (outputSize == 0) { // DoubleByte
int ncode = encodeDouble(c);
if (ncode != UNMAPPABLE_ENCODING) {
if ((ncode & 0xFF0000) == 0) {
outputByte[0] = (byte) ((ncode & 0xff00) >> 8);
outputByte[1] = (byte) (ncode & 0xff);
outputSize = 2;
} else {
outputByte[0] = (byte) 0x8f;
outputByte[1] = (byte) ((ncode & 0xff00) >> 8);
outputByte[2] = (byte) (ncode & 0xff);
outputSize = 3;
}
} else {
return CoderResult.unmappableForLength(1);
}
}
if (dl - dp < outputSize)
return CoderResult.OVERFLOW;
// Put the byte in the output buffer
for (int i = 0; i < outputSize; i++) {
da[dp++] = outputByte[i];
}
sp++;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
private CoderResult encodeBufferLoop(CharBuffer src,
ByteBuffer dst)
{
int outputSize = 0;
byte[] outputByte;
int inputSize = 0; // Size of input
byte[] tmpBuf = new byte[3];
int mark = src.position();
try {
while (src.hasRemaining()) {
outputByte = tmpBuf;
char c = src.get();
if (Character.isSurrogate(c)) {
if (sgp.parse(c, src) < 0)
return sgp.error();
return sgp.unmappableResult();
}
outputSize = encodeSingle(c, outputByte);
if (outputSize == 0) { // DoubleByte
int ncode = encodeDouble(c);
if (ncode != UNMAPPABLE_ENCODING) {
if ((ncode & 0xFF0000) == 0) {
outputByte[0] = (byte) ((ncode & 0xff00) >> 8);
outputByte[1] = (byte) (ncode & 0xff);
outputSize = 2;
} else {
outputByte[0] = (byte) 0x8f;
outputByte[1] = (byte) ((ncode & 0xff00) >> 8);
outputByte[2] = (byte) (ncode & 0xff);
outputSize = 3;
}
} else {
return CoderResult.unmappableForLength(1);
}
}
if (dst.remaining() < outputSize)
return CoderResult.OVERFLOW;
// Put the byte in the output buffer
for (int i = 0; i < outputSize; i++) {
dst.put(outputByte[i]);
}
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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