0N/A/*
2273N/A * Copyright (c) 1997, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
0N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
1472N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1472N/A *
1472N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0N/A * or visit www.oracle.com if you need additional information or have any
0N/A * questions.
0N/A */
1879N/Apackage sun.io;
1879N/A
1879N/Apublic abstract class CharToByteEUC extends CharToByteConverter
1879N/A{
1879N/A
1879N/A private char highHalfZoneCode;
1879N/A private byte[] outputByte;
1879N/A
1879N/A protected short index1[];
1879N/A protected String index2;
1879N/A protected String index2a;
1879N/A protected String index2b;
1879N/A protected String index2c;
1879N/A protected int mask1;
1879N/A protected int mask2;
0N/A protected int shift;
0N/A
0N/A private byte[] workByte = new byte[4];
0N/A
0N/A /**
0N/A * flush out any residual data and reset the buffer state
0N/A */
0N/A public int flush(byte [] output, int outStart, int outEnd)
0N/A throws MalformedInputException, ConversionBufferFullException
0N/A {
0N/A
0N/A if (highHalfZoneCode != 0) {
0N/A reset();
0N/A badInputLength = 0;
0N/A throw new MalformedInputException();
0N/A }
0N/A
0N/A reset();
0N/A return 0;
0N/A }
0N/A
0N/A /**
0N/A * Character conversion
0N/A */
0N/A public int convert(char[] input, int inOff, int inEnd,
0N/A byte[] output, int outOff, int outEnd)
0N/A throws UnknownCharacterException, MalformedInputException,
0N/A ConversionBufferFullException
0N/A {
0N/A char inputChar;
0N/A int inputSize;
0N/A
0N/A byteOff = outOff;
0N/A charOff = inOff;
0N/A
0N/A while(charOff < inEnd) {
0N/A
0N/A outputByte = workByte;
0N/A
0N/A int index;
0N/A int theBytes;
0N/A int spaceNeeded;
0N/A boolean allZeroes = true;
0N/A int i;
0N/A
0N/A
0N/A if (highHalfZoneCode == 0) {
0N/A inputChar = input[charOff];
0N/A inputSize = 1;
0N/A } else {
0N/A inputChar = highHalfZoneCode;
0N/A inputSize = 0;
0N/A highHalfZoneCode = 0;
0N/A }
0N/A
0N/A
0N/A // Is this a high surrogate?
0N/A if(inputChar >= '\ud800' && inputChar <= '\udbff') {
1213N/A // Is this the last character of the input?
0N/A if (charOff + inputSize >= inEnd) {
0N/A highHalfZoneCode = inputChar;
0N/A charOff += inputSize;
0N/A break;
0N/A }
0N/A
0N/A // Is there a low surrogate following?
0N/A inputChar = input[charOff + inputSize];
0N/A if (inputChar >= '\udc00' && inputChar <= '\udfff') {
0N/A
0N/A // We have a valid surrogate pair. Too bad we don't do
0N/A // surrogates. Is substitution enabled?
0N/A if (subMode) {
0N/A outputByte = subBytes;
0N/A inputSize++;
0N/A } else {
0N/A badInputLength = 2;
0N/A throw new UnknownCharacterException();
0N/A }
0N/A } else {
0N/A
0N/A // We have a malformed surrogate pair
0N/A badInputLength = 1;
0N/A throw new MalformedInputException();
0N/A }
0N/A }
0N/A
0N/A // Is this an unaccompanied low surrogate?
0N/A else
0N/A if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
0N/A badInputLength = 1;
0N/A throw new MalformedInputException();
0N/A } else {
0N/A
0N/A String theChars;
0N/A char aChar;
0N/A
0N/A // We have a valid character, get the bytes for it
0N/A index = index1[((inputChar & mask1) >> shift)] + (inputChar & mask2);
0N/A
0N/A if (index < 7500)
0N/A theChars = index2;
0N/A else
0N/A if (index < 15000) {
0N/A index = index - 7500;
0N/A theChars = index2a;
0N/A }
0N/A else
0N/A if (index < 22500){
0N/A index = index - 15000;
0N/A theChars = index2b;
0N/A }
0N/A else {
0N/A index = index - 22500;
0N/A theChars = index2c;
0N/A }
0N/A
0N/A aChar = theChars.charAt(2*index);
0N/A outputByte[0] = (byte)((aChar & 0xff00)>>8);
0N/A outputByte[1] = (byte)(aChar & 0x00ff);
0N/A aChar = theChars.charAt(2*index + 1);
0N/A outputByte[2] = (byte)((aChar & 0xff00)>>8);
0N/A outputByte[3] = (byte)(aChar & 0x00ff);
0N/A }
0N/A
0N/A // if there was no mapping - look for substitution characters
0N/A
0N/A for (i = 0; i < outputByte.length; i++) {
0N/A if (outputByte[i] != 0x00) {
0N/A allZeroes = false;
0N/A break;
0N/A }
0N/A }
0N/A
0N/A if (allZeroes && inputChar != '\u0000')
0N/A {
0N/A if (subMode) {
0N/A outputByte = subBytes;
0N/A } else {
0N/A badInputLength = 1;
0N/A throw new UnknownCharacterException();
0N/A }
0N/A }
0N/A
0N/A int oindex = 0;
0N/A for (spaceNeeded = outputByte.length; spaceNeeded > 1; spaceNeeded--){
0N/A if (outputByte[oindex++] != 0x00 )
0N/A break;
0N/A }
0N/A
0N/A if (byteOff + spaceNeeded > outEnd)
0N/A throw new ConversionBufferFullException();
0N/A
0N/A
0N/A for (i = outputByte.length - spaceNeeded; i < outputByte.length; i++) {
0N/A output[byteOff++] = outputByte[i];
0N/A }
0N/A
0N/A charOff += inputSize;
0N/A }
0N/A
0N/A return byteOff - outOff;
0N/A }
0N/A
0N/A /**
0N/A * Resets converter to its initial state.
0N/A */
0N/A public void reset() {
0N/A charOff = byteOff = 0;
0N/A highHalfZoneCode = 0;
0N/A }
0N/A
0N/A /**
0N/A * Returns the maximum number of bytes needed to convert a char.
0N/A */
0N/A public int getMaxBytesPerChar() {
0N/A return 2;
0N/A }
0N/A
0N/A
0N/A /**
0N/A * Returns true if the given character can be converted to the
0N/A * target character encoding.
0N/A */
0N/A public boolean canConvert(char ch) {
0N/A int index;
0N/A String theChars;
0N/A
0N/A index = index1[((ch & mask1) >> shift)] + (ch & mask2);
0N/A
0N/A if (index < 7500)
0N/A theChars = index2;
0N/A else
0N/A if (index < 15000) {
0N/A index = index - 7500;
0N/A theChars = index2a;
0N/A }
0N/A else
0N/A if (index < 22500){
0N/A index = index - 15000;
0N/A theChars = index2b;
0N/A }
0N/A else {
0N/A index = index - 22500;
0N/A theChars = index2c;
0N/A }
0N/A
0N/A if (theChars.charAt(2*index) != '\u0000' ||
0N/A theChars.charAt(2*index + 1) != '\u0000')
0N/A return (true);
0N/A
0N/A // only return true if input char was unicode null - all others are
0N/A // undefined
0N/A return( ch == '\u0000');
0N/A
0N/A }
0N/A
0N/A}
0N/A