/*
* Copyright (c) 1996, 1998, 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.io;
public class CharToByteISO8859_1 extends CharToByteConverter {
// Return the character set ID
public String getCharacterEncoding()
{
return "ISO8859_1";
}
private char highHalfZoneCode;
public int flush(byte[] output, int outStart, int outEnd)
throws MalformedInputException
{
if (highHalfZoneCode != 0) {
highHalfZoneCode = 0;
throw new MalformedInputException
("String ends with <High Half Zone code> of UTF16");
}
byteOff = charOff = 0;
return 0;
}
/*
* Character conversion
*/
public int convert(char[] input, int inOff, int inEnd,
byte[] output, int outOff, int outEnd)
throws MalformedInputException,
UnknownCharacterException,
ConversionBufferFullException
{
char inputChar; // Input character to be converted
byte[] outputByte; // Output byte written to output
byte[] tmpArray = new byte[1];
int inputSize; // Size of input
int outputSize; // Size of output
// Record beginning offsets
charOff = inOff;
byteOff = outOff;
if (highHalfZoneCode != 0) {
inputChar = highHalfZoneCode;
highHalfZoneCode = 0;
if (input[inOff] >= 0xdc00 && input[inOff] <= 0xdfff) {
// This is legal UTF16 sequence.
if (subMode) {
outputSize = subBytes.length;
if (byteOff + outputSize > outEnd)
throw new ConversionBufferFullException();
for(int i = 0; i < outputSize; i++)
output[byteOff++] = subBytes[i];
charOff += 1;
} else {
badInputLength = 1;
throw new UnknownCharacterException();
}
} else {
// This is illegal UTF16 sequence.
badInputLength = 0;
throw new MalformedInputException
("Previous converted string ends with " +
"<High Half Zone Code> of UTF16 " +
", but this string is not begin with <Low Half Zone>");
}
}
// Loop until we hit the end of the input
while(charOff < inEnd) {
outputByte = tmpArray;
// Get the input character
inputChar = input[charOff];
// default outputSize
outputSize = 1;
// Assume this is a simple character
inputSize = 1;
// Is this a high surrogate?
if(inputChar >= '\uD800' && inputChar <= '\uDBFF') {
// Is this the last character in the input?
if (charOff + 1 == inEnd) {
highHalfZoneCode = inputChar;
break;
}
// Is there a low surrogate following?
inputChar = input[charOff + 1];
if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
// We have a valid surrogate pair. Too bad we don't map
// surrogates. Is substitution enabled?
if (subMode) {
outputByte = subBytes;
outputSize = subBytes.length;
inputSize = 2;
} else {
badInputLength = 2;
throw new UnknownCharacterException();
}
} else {
// We have a malformed surrogate pair
badInputLength = 1;
throw new MalformedInputException();
}
}
// Is this an unaccompanied low surrogate?
else if (inputChar >= '\uDC00' && inputChar <= '\uDFFF') {
badInputLength = 1;
throw new MalformedInputException();
}
// Not part of a surrogate, so try to convert
else {
// Is this character mappable?
if (inputChar <= '\u00FF') {
outputByte[0] = (byte)inputChar;
} else {
// Is substitution enabled?
if (subMode) {
outputByte = subBytes;
outputSize = subBytes.length;
} else {
badInputLength = 1;
throw new UnknownCharacterException();
}
}
}
// If we don't have room for the output, throw an exception
if (byteOff + outputSize > outEnd)
throw new ConversionBufferFullException();
// Put the byte in the output buffer
for (int i = 0; i < outputSize; i++) {
output[byteOff++] = outputByte[i];
}
charOff += inputSize;
}
// Return the length written to the output buffer
return byteOff-outOff;
}
// Determine if a character is mappable or not
public boolean canConvert(char ch)
{
return (ch <= '\u00FF');
}
// Reset the converter
public void reset()
{
byteOff = charOff = 0;
highHalfZoneCode = 0;
}
/**
* returns the maximum number of bytes needed to convert a char
*/
public int getMaxBytesPerChar()
{
return 1;
}
}