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	/*
	* Copyright (c) 2003, 2006, 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.CharsetEncoder;
	import java.nio.charset.CoderResult;
	import sun.nio.cs.Surrogate;


	public abstract class SimpleEUCEncoder
	extends CharsetEncoder
	{

	protected short index1[];
	protected String index2;
	protected String index2a;
	protected String index2b;
	protected String index2c;
	protected int mask1;
	protected int mask2;
	protected int shift;

	private byte[] outputByte = new byte[4];
	private final Surrogate.Parser sgp = new Surrogate.Parser();

	protected SimpleEUCEncoder(Charset cs)
	{
	super(cs, 3.0f, 4.0f);
	}

	/**
	* Returns true if the given character can be converted to the
	* target character encoding.
	*/

	public boolean canEncode(char ch) {
	int index;
	String theChars;

	index = index1[((ch & mask1) >> shift)] + (ch & mask2);

	if (index < 7500)
	theChars = index2;
	else
	if (index < 15000) {
	index = index - 7500;
	theChars = index2a;
	}
	else
	if (index < 22500){
	index = index - 15000;
	theChars = index2b;
	}
	else {
	index = index - 22500;
	theChars = index2c;
	}

	if (theChars.charAt(2*index) != '\u0000' \|\|
	theChars.charAt(2*index + 1) != '\u0000')
	return (true);

	// only return true if input char was unicode null - all others are
	// undefined
	return( ch == '\u0000');

	}
	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 index;
	int spaceNeeded;
	int i;

	try {
	while (sp < sl) {
	boolean allZeroes = true;
	char inputChar = sa[sp];
	if (Character.isSurrogate(inputChar)) {
	if (sgp.parse(inputChar, sa, sp, sl) < 0)
	return sgp.error();
	return sgp.unmappableResult();
	}

	if (inputChar >= '\uFFFE')
	return CoderResult.unmappableForLength(1);

	String theChars;
	char aChar;

	// We have a valid character, get the bytes for it
	index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2);

	if (index < 7500)
	theChars = index2;
	else if (index < 15000) {
	index = index - 7500;
	theChars = index2a;
	} else if (index < 22500){
	index = index - 15000;
	theChars = index2b;
	}
	else {
	index = index - 22500;
	theChars = index2c;
	}

	aChar = theChars.charAt(2*index);
	outputByte[0] = (byte)((aChar & 0xff00)>>8);
	outputByte[1] = (byte)(aChar & 0x00ff);
	aChar = theChars.charAt(2*index + 1);
	outputByte[2] = (byte)((aChar & 0xff00)>>8);
	outputByte[3] = (byte)(aChar & 0x00ff);

	for (i = 0; i < outputByte.length; i++) {
	if (outputByte[i] != 0x00) {
	allZeroes = false;
	break;
	}
	}

	if (allZeroes && inputChar != '\u0000') {
	return CoderResult.unmappableForLength(1);
	}

	int oindex = 0;

	for (spaceNeeded = outputByte.length;
	spaceNeeded > 1; spaceNeeded--){
	if (outputByte[oindex++] != 0x00 )
	break;
	}

	if (dp + spaceNeeded > dl)
	return CoderResult.OVERFLOW;

	for (i = outputByte.length - spaceNeeded;
	i < outputByte.length; 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 index;
	int spaceNeeded;
	int i;
	int mark = src.position();
	try {
	while (src.hasRemaining()) {
	char inputChar = src.get();
	boolean allZeroes = true;
	if (Character.isSurrogate(inputChar)) {
	if (sgp.parse(inputChar, src) < 0)
	return sgp.error();
	return sgp.unmappableResult();
	}

	if (inputChar >= '\uFFFE')
	return CoderResult.unmappableForLength(1);

	String theChars;
	char aChar;

	// We have a valid character, get the bytes for it
	index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2);

	if (index < 7500)
	theChars = index2;
	else if (index < 15000) {
	index = index - 7500;
	theChars = index2a;
	} else if (index < 22500){
	index = index - 15000;
	theChars = index2b;
	}
	else {
	index = index - 22500;
	theChars = index2c;
	}

	aChar = theChars.charAt(2*index);
	outputByte[0] = (byte)((aChar & 0xff00)>>8);
	outputByte[1] = (byte)(aChar & 0x00ff);
	aChar = theChars.charAt(2*index + 1);
	outputByte[2] = (byte)((aChar & 0xff00)>>8);
	outputByte[3] = (byte)(aChar & 0x00ff);

	for (i = 0; i < outputByte.length; i++) {
	if (outputByte[i] != 0x00) {
	allZeroes = false;
	break;
	}
	}
	if (allZeroes && inputChar != '\u0000') {
	return CoderResult.unmappableForLength(1);
	}

	int oindex = 0;

	for (spaceNeeded = outputByte.length;
	spaceNeeded > 1; spaceNeeded--){
	if (outputByte[oindex++] != 0x00 )
	break;
	}
	if (dst.remaining() < spaceNeeded)
	return CoderResult.OVERFLOW;

	for (i = outputByte.length - spaceNeeded;
	i < outputByte.length; i++) {
	dst.put(outputByte[i]);
	}
	mark++;
	}
	return CoderResult.UNDERFLOW;
	} finally {
	src.position(mark);
	}
	}

	protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {
	if (true && src.hasArray() && dst.hasArray())
	return encodeArrayLoop(src, dst);
	else
	return encodeBufferLoop(src, dst);
	}

	public byte encode(char inputChar) {
	return (byte)index2.charAt(index1[(inputChar & mask1) >> shift] +
	(inputChar & mask2));
	}
	}

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