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/*
* Copyright (c) 2000, 2012, 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.
*
* 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.
*/
/*
*/
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
import java.nio.charset.CharacterCodingException;
import java.nio.charset.MalformedInputException;
import java.nio.charset.UnmappableCharacterException;
import sun.nio.cs.Surrogate;
public abstract class SingleByteEncoder
extends CharsetEncoder
{
private final short index1[];
private final String index2;
private final int mask1;
private final int mask2;
private final int shift;
private final Surrogate.Parser sgp = new Surrogate.Parser();
protected SingleByteEncoder(Charset cs,
short[] index1, String index2,
int mask1, int mask2, int shift)
{
super(cs, 1.0f, 1.0f);
this.index1 = index1;
this.index2 = index2;
this.mask1 = mask1;
this.mask2 = mask2;
this.shift = shift;
}
public boolean canEncode(char c) {
char testEncode = index2.charAt(index1[(c & mask1) >> shift]
+ (c & mask2));
return testEncode != '\u0000' || c == '\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);
try {
while (sp < sl) {
char c = sa[sp];
if (Character.isSurrogate(c)) {
if (sgp.parse(c, sa, sp, sl) < 0)
return sgp.error();
return sgp.unmappableResult();
}
if (c >= '\uFFFE')
return CoderResult.unmappableForLength(1);
if (dl - dp < 1)
return CoderResult.OVERFLOW;
char e = index2.charAt(index1[(c & mask1) >> shift]
+ (c & mask2));
// If output byte is zero because input char is zero
// then character is mappable, o.w. fail
if (e == '\u0000' && c != '\u0000')
return CoderResult.unmappableForLength(1);
sp++;
da[dp++] = (byte)e;
}
return CoderResult.UNDERFLOW;
} finally {
src.position(sp - src.arrayOffset());
dst.position(dp - dst.arrayOffset());
}
}
private CoderResult encodeBufferLoop(CharBuffer src, ByteBuffer dst) {
int mark = src.position();
try {
while (src.hasRemaining()) {
char c = src.get();
if (Character.isSurrogate(c)) {
if (sgp.parse(c, src) < 0)
return sgp.error();
return sgp.unmappableResult();
}
if (c >= '\uFFFE')
return CoderResult.unmappableForLength(1);
if (!dst.hasRemaining())
return CoderResult.OVERFLOW;
char e = index2.charAt(index1[(c & mask1) >> shift]
+ (c & mask2));
// If output byte is zero because input char is zero
// then character is mappable, o.w. fail
if (e == '\u0000' && c != '\u0000')
return CoderResult.unmappableForLength(1);
mark++;
dst.put((byte)e);
}
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));
}
}
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