/*
* 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));
}
}