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* 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.
*
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package sun.awt.motif;
import java.nio.CharBuffer;
import java.nio.ByteBuffer;
import java.nio.charset.*;
import sun.nio.cs.ext.EUC_TW;
public abstract class X11CNS11643 extends Charset {
private final int plane;
public X11CNS11643 (int plane, String name) {
super(name, null);
switch (plane) {
case 1:
this.plane = 0; // CS1
break;
case 2:
case 3:
this.plane = plane;
break;
default:
throw new IllegalArgumentException
("Only planes 1, 2, and 3 supported");
}
}
public CharsetEncoder newEncoder() {
return new Encoder(this, plane);
}
public CharsetDecoder newDecoder() {
return new Decoder(this, plane);
}
public boolean contains(Charset cs) {
return cs instanceof X11CNS11643;
}
private class Encoder extends EUC_TW.Encoder {
private int plane;
public Encoder(Charset cs, int plane) {
super(cs);
this.plane = plane;
}
private byte[] bb = new byte[4];
public boolean canEncode(char c) {
if (c <= 0x7F) {
return false;
}
int nb = toEUC(c, bb);
if (nb == -1)
return false;
int p = 0;
if (nb == 4)
p = (bb[1] & 0xff) - 0xa0;
return (p == plane);
}
public boolean isLegalReplacement(byte[] repl) {
return true;
}
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'&& c < '\uFFFE') {
int nb = toEUC(c, bb);
if (nb != -1) {
int p = 0;
if (nb == 4)
p = (bb[1] & 0xff) - 0xa0;
if (p == plane) {
if (dl - dp < 2)
return CoderResult.OVERFLOW;
if (nb == 2) {
da[dp++] = (byte)(bb[0] & 0x7f);
da[dp++] = (byte)(bb[1] & 0x7f);
} else {
da[dp++] = (byte)(bb[2] & 0x7f);
da[dp++] = (byte)(bb[3] & 0x7f);
}
sp++;
continue;
}
}
}
return CoderResult.unmappableForLength(1);
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
}
private class Decoder extends EUC_TW.Decoder {
int plane;
private String table;
protected Decoder(Charset cs, int plane) {
super(cs);
if (plane == 0)
this.plane = plane;
else if (plane == 2 || plane == 3)
this.plane = plane - 1;
else
throw new IllegalArgumentException
("Only planes 1, 2, and 3 supported");
}
//we only work on array backed buffer.
protected CoderResult decodeLoop(ByteBuffer src, CharBuffer dst) {
byte[] sa = src.array();
int sp = src.arrayOffset() + src.position();
int sl = src.arrayOffset() + src.limit();
char[] da = dst.array();
int dp = dst.arrayOffset() + dst.position();
int dl = dst.arrayOffset() + dst.limit();
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[] cc = toUnicode(b1, b2, plane);
// plane3 has non-bmp characters(added), x11cnsp3
// however does not support them
if (cc == null || cc.length == 2)
return CoderResult.unmappableForLength(2);
if (dl - dp < 1)
return CoderResult.OVERFLOW;
da[dp++] = cc[0];
sp +=2;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
}
}