/*
* Copyright (c) 1996, 2005, 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.font;
import java.nio.CharBuffer;
import java.nio.ByteBuffer;
import java.nio.charset.*;
import sun.nio.cs.*;
import static sun.nio.cs.CharsetMapping.*;
public class X11GB2312 extends Charset {
public X11GB2312 () {
super("X11GB2312", null);
}
public CharsetEncoder newEncoder() {
return new Encoder(this);
}
public CharsetDecoder newDecoder() {
return new Decoder(this);
}
public boolean contains(Charset cs) {
return cs instanceof X11GB2312;
}
private class Encoder extends CharsetEncoder {
private DoubleByte.Encoder enc = (DoubleByte.Encoder)new EUC_CN().newEncoder();
public Encoder(Charset cs) {
super(cs, 2.0f, 2.0f);
}
public boolean canEncode(char c) {
if (c <= 0x7F) {
return false;
}
return enc.canEncode(c);
}
protected int encodeDouble(char c) {
return enc.encodeChar(c);
}
protected CoderResult encodeLoop(CharBuffer src, ByteBuffer dst) {
char[] sa = src.array();
int sp = src.arrayOffset() + src.position();
int sl = src.arrayOffset() + src.limit();
byte[] da = dst.array();
int dp = dst.arrayOffset() + dst.position();
int dl = dst.arrayOffset() + dst.limit();
try {
while (sp < sl) {
char c = sa[sp];
if (c <= '\u007f')
return CoderResult.unmappableForLength(1);
int ncode = encodeDouble(c);
if (ncode != 0 && c != '\u0000' ) {
da[dp++] = (byte) ((ncode >> 8) & 0x7f);
da[dp++] = (byte) (ncode & 0x7f);
sp++;
continue;
}
return CoderResult.unmappableForLength(1);
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
public boolean isLegalReplacement(byte[] repl) {
return true;
}
}
private class Decoder extends CharsetDecoder {
private DoubleByte.Decoder dec = (DoubleByte.Decoder)new EUC_CN().newDecoder();
public Decoder(Charset cs) {
super(cs, 0.5f, 1.0f);
}
protected char decodeDouble(int b1, int b2) {
return dec.decodeDouble(b1, b2);
}
protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) {
byte[] sa = src.array();
int sp = src.arrayOffset() + src.position();
int sl = src.arrayOffset() + src.limit();
assert (sp <= sl);
sp = (sp <= sl ? sp : sl);
char[] da = dst.array();
int dp = dst.arrayOffset() + dst.position();
int dl = dst.arrayOffset() + dst.limit();
assert (dp <= dl);
dp = (dp <= dl ? dp : dl);
try {
while (sp < sl) {
if ( sl - sp < 2) {
return CoderResult.UNDERFLOW;
}
int b1 = sa[sp] & 0xFF | 0x80;
int b2 = sa[sp + 1] & 0xFF | 0x80;
char c = decodeDouble(b1, b2);
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