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	/*
	* 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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