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/*
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* Copyright 1996-2002 Sun Microsystems, Inc. All Rights Reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Sun designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Sun in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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* CA 95054 USA or visit www.sun.com if you need additional information or
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* have any questions.
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*/
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package sun.io;
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import java.io.*;
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/**
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* Convert arrays containing Unicode characters into arrays of bytes, using the
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* platform-default byte order.
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*
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* @author Mark Reinhold
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*/
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public class CharToByteUnicode extends CharToByteConverter {
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static final char BYTE_ORDER_MARK = (char) 0xfeff;
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protected boolean usesMark = true; /* A mark should be written */
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private boolean markWritten = false; /* A mark has been written */
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static final int UNKNOWN = 0;
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static final int BIG = 1;
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static final int LITTLE = 2;
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protected int byteOrder = UNKNOWN;
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public CharToByteUnicode() {
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String enc = (String) java.security.AccessController.doPrivileged(
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new sun.security.action.GetPropertyAction("sun.io.unicode.encoding",
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"UnicodeBig"));
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if (enc.equals("UnicodeBig"))
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byteOrder = BIG;
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else if (enc.equals("UnicodeLittle"))
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byteOrder = LITTLE;
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else
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byteOrder = BIG;
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}
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public CharToByteUnicode(int byteOrder, boolean usesMark) {
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this.byteOrder = byteOrder;
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this.usesMark = usesMark;
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}
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public CharToByteUnicode(boolean usesMark) {
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this();
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this.usesMark = usesMark;
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}
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public String getCharacterEncoding() {
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switch (byteOrder) {
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case BIG:
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return usesMark ? "UnicodeBig" : "UnicodeBigUnmarked";
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case LITTLE:
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return usesMark ? "UnicodeLittle" : "UnicodeLittleUnmarked";
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default:
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return "UnicodeUnknown";
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}
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}
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public int convert(char in[], int inOff, int inEnd,
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byte out[], int outOff, int outEnd)
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throws ConversionBufferFullException, MalformedInputException
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{
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charOff = inOff;
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byteOff = outOff;
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if (inOff >= inEnd)
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return 0;
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int inI = inOff,
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outI = outOff,
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outTop = outEnd - 2;
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if (usesMark && !markWritten) {
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if (outI > outTop)
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throw new ConversionBufferFullException();
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if (byteOrder == BIG) {
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out[outI++] = (byte) (BYTE_ORDER_MARK >> 8);
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out[outI++] = (byte) (BYTE_ORDER_MARK & 0xff);
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}
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else {
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out[outI++] = (byte) (BYTE_ORDER_MARK & 0xff);
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out[outI++] = (byte) (BYTE_ORDER_MARK >> 8);
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}
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markWritten = true;
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}
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if (byteOrder == BIG) {
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while (inI < inEnd) {
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if (outI > outTop) {
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charOff = inI;
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byteOff = outI;
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throw new ConversionBufferFullException();
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}
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char c = in[inI++];
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out[outI++] = (byte) (c >> 8);
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out[outI++] = (byte) (c & 0xff);
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}
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}
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else {
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while (inI < inEnd) {
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if (outI > outTop) {
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charOff = inI;
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byteOff = outI;
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throw new ConversionBufferFullException();
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}
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char c = in[inI++];
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out[outI++] = (byte) (c & 0xff);
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out[outI++] = (byte) (c >> 8);
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}
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}
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charOff = inI;
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byteOff = outI;
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return outI - outOff;
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}
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public int flush(byte in[], int inOff, int inEnd) {
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byteOff = charOff = 0;
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return 0;
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}
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public void reset () {
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byteOff = charOff = 0;
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markWritten = false;
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}
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public int getMaxBytesPerChar() {
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return 4; /* To allow for writing the byte-order mark */
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}
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}
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