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ISO_8859_1.java, [...]: New files.

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2002-11-11  Jesse Rosenstock  <jmr@ugcs.caltech.edu>

	* gnu/java/nio/charset/ISO_8859_1.java,
	gnu/java/nio/charset/Provider.java,
	gnu/java/nio/charset/US_ASCII.java,
	gnu/java/nio/charset/UTF_16.java,
	gnu/java/nio/charset/UTF_16BE.java,
	gnu/java/nio/charset/UTF_16Decoder.java,
	gnu/java/nio/charset/UTF_16Encoder.java,
	gnu/java/nio/charset/UTF_16LE.java,
	gnu/java/nio/charset/UTF_8.java: New files.
	* Makefile.am ():
	Added new files.
	* Makefile.in: Regenerated.

From-SVN: r59013
This commit is contained in:
Jesse Rosenstock 2002-11-11 07:36:41 +00:00 committed by Michael Koch
parent ac7bc6bb2f
commit 8a423d779f
10 changed files with 1245 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
libjava/ChangeLog
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@ -1,3 +1,18 @@
2002-11-11 Jesse Rosenstock <jmr@ugcs.caltech.edu>
* gnu/java/nio/charset/ISO_8859_1.java,
gnu/java/nio/charset/Provider.java,
gnu/java/nio/charset/US_ASCII.java,
gnu/java/nio/charset/UTF_16.java,
gnu/java/nio/charset/UTF_16BE.java,
gnu/java/nio/charset/UTF_16Decoder.java,
gnu/java/nio/charset/UTF_16Encoder.java,
gnu/java/nio/charset/UTF_16LE.java,
gnu/java/nio/charset/UTF_8.java: New files.
* Makefile.am ():
Added new files.
* Makefile.in: Regenerated.
2002-11-11 Michael Koch <konqueror@gmx.de>
* java/nio/charset/CharacterCodingException.java:

132
libjava/gnu/java/nio/charset/ISO_8859_1.java Normal file
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/* ISO_8859_1.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* ISO-8859-1 charset.
*
* @author Jesse Rosenstock
*/
final class ISO_8859_1 extends Charset
{
ISO_8859_1 ()
{
super ("ISO-8859-1", new String[]{"ISO-LATIN-1"});
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII || cs instanceof ISO_8859_1;
}
public CharsetDecoder newDecoder ()
{
return new Decoder (this);
}
public CharsetEncoder newEncoder ()
{
return new Encoder (this);
}
private static final class Decoder extends CharsetDecoder
{
private Decoder (Charset cs)
{
super (cs, 1.0f, 1.0f);
}
protected CoderResult decodeLoop (ByteBuffer in, CharBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
while (in.hasRemaining ())
{
byte b = in.get ();
if (!out.hasRemaining ())
{
in.position (in.position () - 1);
return CoderResult.OVERFLOW;
}
out.put ((char) (b & 0xFF));
}
return CoderResult.UNDERFLOW;
}
}
private static final class Encoder extends CharsetEncoder
{
private Encoder (Charset cs)
{
super (cs, 1.0f, 1.0f);
}
protected CoderResult encodeLoop (CharBuffer in, ByteBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
while (in.hasRemaining ())
{
char c = in.get ();
if (c > 0xFF)
{
in.position (in.position () - 1);
return CoderResult.unmappableForLength (1);
}
if (!out.hasRemaining ())
{
in.position (in.position () - 1);
return CoderResult.OVERFLOW;
}
out.put ((byte) c);
}
return CoderResult.UNDERFLOW;
}
}
}

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libjava/gnu/java/nio/charset/Provider.java Normal file
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/* Provider.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.charset.Charset;
import java.nio.charset.spi.CharsetProvider;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
/**
* Charset provider for the required charsets. Used by
* {@link Charset#charsetForName} and * {@link Charset#availableCharsets}.
*
* @author Jesse Rosenstock
* @see Charset
*/
public final class Provider extends CharsetProvider
{
private static Provider singleton;
static
{
synchronized (Provider.class)
{
singleton = null;
}
}
/**
* Map from charset name to charset canonical name.
*/
private final HashMap canonicalNames;
/**
* Map from canonical name to Charset.
* TODO: We may want to use soft references. We would then need to keep
* track of the class name to regenerate the object.
*/
private final HashMap charsets;
private Provider ()
{
// FIXME: We might need to make the name comparison case insensitive.
// Verify this with the Sun JDK.
canonicalNames = new HashMap ();
charsets = new HashMap ();
// US-ASCII aka ISO646-US
addCharset (new US_ASCII ());
// ISO-8859-1 aka ISO-LATIN-1
addCharset (new ISO_8859_1 ());
// UTF-8
addCharset (new UTF_8 ());
// UTF-16BE
addCharset (new UTF_16BE ());
// UTF-16LE
addCharset (new UTF_16LE ());
// UTF-16
addCharset (new UTF_16 ());
}
public Iterator charsets ()
{
return Collections.unmodifiableCollection (charsets.values ())
.iterator ();
}
public Charset charsetForName (String charsetName)
{
return (Charset) charsets.get (canonicalize (charsetName));
}
private Object canonicalize (String charsetName)
{
Object o = canonicalNames.get (charsetName);
return o == null ? charsetName : o;
}
private void addCharset (Charset cs)
{
String canonicalName = cs.name ();
charsets.put (canonicalName, cs);
for (Iterator i = cs.aliases ().iterator (); i.hasNext (); )
canonicalNames.put (i.next (), canonicalName);
}
public static synchronized Provider provider ()
{
if (singleton == null)
singleton = new Provider ();
return singleton;
}
}

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libjava/gnu/java/nio/charset/US_ASCII.java Normal file
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/* US_ASCII.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* US-ASCII charset.
*
* @author Jesse Rosenstock
*/
final class US_ASCII extends Charset
{
US_ASCII ()
{
super ("US-ASCII", new String[]{"ISO646-US"});
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII;
}
public CharsetDecoder newDecoder ()
{
return new Decoder (this);
}
public CharsetEncoder newEncoder ()
{
return new Encoder (this);
}
private static final class Decoder extends CharsetDecoder
{
private Decoder (Charset cs)
{
super (cs, 1.0f, 1.0f);
}
protected CoderResult decodeLoop (ByteBuffer in, CharBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
while (in.hasRemaining ())
{
byte b = in.get ();
if (b < 0)
{
in.position (in.position () - 1);
return CoderResult.malformedForLength (1);
}
if (!out.hasRemaining ())
{
in.position (in.position () - 1);
return CoderResult.OVERFLOW;
}
out.put ((char) b);
}
return CoderResult.UNDERFLOW;
}
}
private static final class Encoder extends CharsetEncoder
{
private Encoder (Charset cs)
{
super (cs, 1.0f, 1.0f);
}
protected CoderResult encodeLoop (CharBuffer in, ByteBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
while (in.hasRemaining ())
{
char c = in.get ();
if (c > Byte.MAX_VALUE)
{
in.position (in.position () - 1);
return CoderResult.unmappableForLength (1);
}
if (!out.hasRemaining ())
{
in.position (in.position () - 1);
return CoderResult.OVERFLOW;
}
out.put ((byte) c);
}
return CoderResult.UNDERFLOW;
}
}
}

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libjava/gnu/java/nio/charset/UTF_16.java Normal file
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/* UTF_16.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* UTF-16 charset.
*
* @author Jesse Rosenstock
*/
final class UTF_16 extends Charset
{
UTF_16 ()
{
super ("UTF-16", null);
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII || cs instanceof ISO_8859_1
|| cs instanceof UTF_8 || cs instanceof UTF_16BE
|| cs instanceof UTF_16LE || cs instanceof UTF_16;
}
public CharsetDecoder newDecoder ()
{
return new UTF_16Decoder (this, UTF_16Decoder.UNKNOWN_ENDIAN);
}
public CharsetEncoder newEncoder ()
{
return new UTF_16Encoder (this, UTF_16Encoder.BIG_ENDIAN, false);
}
}

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libjava/gnu/java/nio/charset/UTF_16BE.java Normal file
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/* UTF_16BE.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* UTF-16BE charset.
*
* @author Jesse Rosenstock
*/
final class UTF_16BE extends Charset
{
UTF_16BE ()
{
super ("UTF-16BE", null);
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII || cs instanceof ISO_8859_1
|| cs instanceof UTF_8 || cs instanceof UTF_16BE
|| cs instanceof UTF_16LE || cs instanceof UTF_16;
}
public CharsetDecoder newDecoder ()
{
return new UTF_16Decoder (this, UTF_16Decoder.BIG_ENDIAN);
}
public CharsetEncoder newEncoder ()
{
return new UTF_16Encoder (this, UTF_16Encoder.BIG_ENDIAN, true);
}
}

169
libjava/gnu/java/nio/charset/UTF_16Decoder.java Normal file
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/* UTF_16Decoder.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CoderResult;
/**
* Decoder for UTF-16, UTF-15LE, and UTF-16BE.
*
* @author Jesse Rosenstock
*/
final class UTF_16Decoder extends CharsetDecoder
{
// byte orders
static final int BIG_ENDIAN = 0;
static final int LITTLE_ENDIAN = 1;
static final int UNKNOWN_ENDIAN = 2;
private static final char BYTE_ORDER_MARK = '\uFEFF';
private static final char REVERSED_BYTE_ORDER_MARK = '\uFFFE';
private final int originalByteOrder;
private int byteOrder;
UTF_16Decoder (Charset cs, int byteOrder)
{
super (cs, 0.5f, 1.0f);
this.originalByteOrder = byteOrder;
this.byteOrder = byteOrder;
}
protected CoderResult decodeLoop (ByteBuffer in, CharBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
int inPos = in.position ();
try
{
while (in.remaining () >= 2)
{
byte b1 = in.get ();
byte b2 = in.get ();
// handle byte order mark
if (byteOrder == UNKNOWN_ENDIAN)
{
char c = (char) ((b1 << 8) | b2);
if (c == BYTE_ORDER_MARK)
{
byteOrder = BIG_ENDIAN;
inPos += 2;
continue;
}
else if (c == REVERSED_BYTE_ORDER_MARK)
{
byteOrder = LITTLE_ENDIAN;
inPos += 2;
continue;
}
else
{
// assume big endian, do not consume bytes,
// continue with normal processing
byteOrder = BIG_ENDIAN;
}
}
char c = byteOrder == BIG_ENDIAN ? (char) ((b1 << 8) | b2)
: (char) ((b2 << 8) | b1);
if (0xD800 <= c && c <= 0xDFFF)
{
// c is a surrogate
// make sure c is a high surrogate
if (c > 0xDBFF)
return CoderResult.malformedForLength (2);
if (in.remaining () < 2)
return CoderResult.UNDERFLOW;
byte b3 = in.get ();
byte b4 = in.get ();
char d = byteOrder == BIG_ENDIAN ? (char) ((b3 << 8) | b4)
: (char) ((b4 << 8) | b3);
// make sure d is a low surrogate
if (d < 0xDC00 || d > 0xDFFF)
return CoderResult.malformedForLength (2);
out.put (c);
out.put (d);
inPos += 4;
}
else
{
if (!out.hasRemaining ())
return CoderResult.UNDERFLOW;
out.put (c);
inPos += 2;
}
}
return CoderResult.UNDERFLOW;
}
finally
{
in.position (inPos);
}
}
/**
* Writes <code>c</code> to <code>out</code> in the byte order
* specified by <code>byteOrder</code>.
**/
private void put (ByteBuffer out, char c)
{
if (byteOrder == BIG_ENDIAN)
{
out.put ((byte) (c >> 8));
out.put ((byte) (c & 0xFF));
}
else
{
out.put ((byte) (c & 0xFF));
out.put ((byte) (c >> 8));
}
}
protected void implReset ()
{
byteOrder = originalByteOrder;
}
}

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libjava/gnu/java/nio/charset/UTF_16Encoder.java Normal file
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/* UTF_16Encoder.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* Encoder for UTF-16, UTF-15LE, and UTF-16BE.
*
* @author Jesse Rosenstock
*/
final class UTF_16Encoder extends CharsetEncoder
{
// byte orders
static final int BIG_ENDIAN = 0;
static final int LITTLE_ENDIAN = 1;
private static final char BYTE_ORDER_MARK = '\uFEFF';
private final int byteOrder;
private final boolean useByteOrderMark;
private boolean needsByteOrderMark;
UTF_16Encoder (Charset cs, int byteOrder, boolean useByteOrderMark)
{
super (cs, 2.0f,
useByteOrderMark ? 4.0f : 2.0f,
byteOrder == BIG_ENDIAN
? new byte[] { (byte) 0xFF, (byte) 0xFD }
: new byte[] { (byte) 0xFD, (byte) 0xFF });
this.byteOrder = byteOrder;
this.useByteOrderMark = useByteOrderMark;
this.needsByteOrderMark = useByteOrderMark;
}
protected CoderResult encodeLoop (CharBuffer in, ByteBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
if (needsByteOrderMark)
{
if (out.remaining () < 2)
return CoderResult.OVERFLOW;
put (out, BYTE_ORDER_MARK);
needsByteOrderMark = false;
}
int inPos = in.position ();
try
{
while (in.hasRemaining ())
{
char c = in.get ();
if (0xD800 <= c && c <= 0xDFFF)
{
// c is a surrogate
// make sure c is a high surrogate
if (c > 0xDBFF)
return CoderResult.malformedForLength (1);
if (in.remaining () < 1)
return CoderResult.UNDERFLOW;
char d = in.get ();
// make sure d is a low surrogate
if (d < 0xDC00 || d > 0xDFFF)
return CoderResult.malformedForLength (1);
put (out, c);
put (out, d);
inPos += 2;
}
else
{
if (out.remaining () < 2)
return CoderResult.OVERFLOW;
put (out, c);
inPos++;
}
}
return CoderResult.UNDERFLOW;
}
finally
{
in.position (inPos);
}
}
/**
* Writes <code>c</code> to <code>out</code> in the byte order
* specified by <code>byteOrder</code>.
**/
private void put (ByteBuffer out, char c)
{
if (byteOrder == BIG_ENDIAN)
{
out.put ((byte) (c >> 8));
out.put ((byte) (c & 0xFF));
}
else
{
out.put ((byte) (c & 0xFF));
out.put ((byte) (c >> 8));
}
}
protected void implReset ()
{
needsByteOrderMark = useByteOrderMark;
}
// TODO: override canEncode(char) and canEncode(CharSequence)
// for performance
}

75
libjava/gnu/java/nio/charset/UTF_16LE.java Normal file
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/* UTF_16LE.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* UTF-16LE charset.
*
* @author Jesse Rosenstock
*/
final class UTF_16LE extends Charset
{
UTF_16LE ()
{
super ("UTF-16LE", null);
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII || cs instanceof ISO_8859_1
|| cs instanceof UTF_8 || cs instanceof UTF_16BE
|| cs instanceof UTF_16LE || cs instanceof UTF_16;
}
public CharsetDecoder newDecoder ()
{
return new UTF_16Decoder (this, UTF_16Decoder.LITTLE_ENDIAN);
}
public CharsetEncoder newEncoder ()
{
return new UTF_16Encoder (this, UTF_16Encoder.LITTLE_ENDIAN, true);
}
}

279
libjava/gnu/java/nio/charset/UTF_8.java Normal file
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/* UTF_8.java --
Copyright (C) 2002 Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath 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 for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package gnu.java.nio.charset;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CharsetEncoder;
import java.nio.charset.CoderResult;
/**
* UTF-8 charset.
*
* <p> UTF-8 references:
* <ul>
* <li> <a href="http://ietf.org/rfc/rfc2279.txt">RFC 2279</a>
* <li> The <a href="http://www.unicode.org/unicode/standard/standard.html">
* Unicode standard</a> and
* <a href="http://www.unicode.org/versions/corrigendum1.html">
* Corrigendum</a>
* </ul>
*
* @author Jesse Rosenstock
*/
final class UTF_8 extends Charset
{
UTF_8 ()
{
super ("UTF-8", null);
}
public boolean contains (Charset cs)
{
return cs instanceof US_ASCII || cs instanceof ISO_8859_1
|| cs instanceof UTF_8 || cs instanceof UTF_16BE
|| cs instanceof UTF_16LE || cs instanceof UTF_16;
}
public CharsetDecoder newDecoder ()
{
return new Decoder (this);
}
public CharsetEncoder newEncoder ()
{
return new Encoder (this);
}
private static final class Decoder extends CharsetDecoder
{
private Decoder (Charset cs)
{
super (cs, 1.0f, 1.0f);
}
protected CoderResult decodeLoop (ByteBuffer in, CharBuffer out)
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
int inPos = 0;
try
{
while (in.hasRemaining ())
{
char c;
byte b1 = in.get ();
int highNibble = (b1 >> 4) & 0xF;
switch (highNibble)
{
case 0: case 1: case 2: case 3:
case 4: case 5: case 6: case 7:
if (out.remaining () < 1)
return CoderResult.OVERFLOW;
out.put ((char) b1);
inPos++;
break;
case 0xC: case 0xD:
byte b2;
if (in.remaining () < 1)
return CoderResult.UNDERFLOW;
if (out.remaining () < 1)
return CoderResult.OVERFLOW;
if (!isContinuation (b2 = in.get ()))
return CoderResult.malformedForLength (1);
c = (char) (((b1 & 0x1F) << 6) | (b2 & 0x3F));
// check that we had the shortest encoding
if (c <= 0x7F)
return CoderResult.malformedForLength (2);
out.put (c);
inPos += 2;
break;
case 0xE:
byte b3;
if (in.remaining () < 2)
return CoderResult.UNDERFLOW;
if (out.remaining () < 1)
return CoderResult.OVERFLOW;
if (!isContinuation (b2 = in.get ()))
return CoderResult.malformedForLength (1);
if (!isContinuation (b3 = in.get ()))
return CoderResult.malformedForLength (1);
c = (char) (((b1 & 0x0F) << 12)
| ((b2 & 0x3F) << 6)
| (b3 & 0x3F));
// check that we had the shortest encoding
if (c <= 0x7FF)
return CoderResult.malformedForLength (3);
out.put (c);
inPos += 3;
break;
default:
return CoderResult.malformedForLength (1);
}
}
return CoderResult.UNDERFLOW;
}
finally
{
// In case we did a get(), then encountered an error, reset the
// position to before the error. If there was no error, this
// will benignly reset the position to the value it already has.
in.position (inPos);
}
}
private static boolean isContinuation (byte b)
{
return (b & 0xC0) == 0x80;
}
}
private static final class Encoder extends CharsetEncoder
{
private Encoder (Charset cs)
{
// According to
// http://www-106.ibm.com/developerworks/unicode/library/utfencodingforms/index.html
// On average, English takes slightly over one unit per code point.
// Most Latin-script languages take about 1.1 bytes. Greek, Russian,
// Arabic and Hebrew take about 1.7 bytes, and most others (including
// Japanese, Chinese, Korean and Hindi) take about 3 bytes.
// We assume we will be dealing with latin scripts, and use 1.1
// for averageBytesPerChar.
super (cs, 1.1f, 4.0f);
}
protected CoderResult encodeLoop (CharBuffer in, ByteBuffer out)
{
int inPos = 0;
try
{
// TODO: Optimize this in the case in.hasArray() / out.hasArray()
while (in.hasRemaining ())
{
int remaining = out.remaining ();
char c = in.get ();
// UCS-4 range (hex.) UTF-8 octet sequence (binary)
// 0000 0000-0000 007F 0xxxxxxx
// 0000 0080-0000 07FF 110xxxxx 10xxxxxx
// 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
// Scalar Value UTF-16 byte 1 byte 2 byte 3 byte 4
// 0000 0000 0xxx xxxx 0000 0000 0xxx xxxx 0xxx xxxx
// 0000 0yyy yyxx xxxx 0000 0yyy yyxx xxxx 110y yyyy 10xx xxxx
// zzzz yyyy yyxx xxxx zzzz yyyy yyxx xxxx 1110 zzzz 10yy yyyy 10xx xxxx
// u uuuu zzzz yyyy yyxx xxxx 1101 10ww wwzz zzyy 1111 0uuu 10uu zzzz 10yy yyyy 10xx xxxx
// + 1101 11yy yyxx xxxx
// Note: uuuuu = wwww + 1
if (c <= 0x7F)
{
if (remaining < 1)
return CoderResult.OVERFLOW;
out.put ((byte) c);
inPos++;
}
else if (c <= 0x7FF)
{
if (remaining < 2)
return CoderResult.OVERFLOW;
out.put ((byte) (0xC0 | (c >> 6)));
out.put ((byte) (0x80 | (c & 0x3F)));
inPos++;
}
else if (0xD800 <= c && c <= 0xDFFF)
{
if (remaining < 4)
return CoderResult.OVERFLOW;
// we got a low surrogate without a preciding high one
if (c > 0xDBFF)
return CoderResult.malformedForLength (1);
// high surrogates
if (!in.hasRemaining ())
return CoderResult.UNDERFLOW;
char d = in.get ();
// make sure d is a low surrogate
if (d < 0xDC00 || d > 0xDFFF)
return CoderResult.malformedForLength (1);
// make the 32 bit value
// int value2 = (c - 0xD800) * 0x400 + (d - 0xDC00) + 0x10000;
int value = (((c & 0x3FF) << 10) | (d & 0x3FF)) + 0x10000;
// assert value == value2;
out.put ((byte) (0xF0 | (value >> 18)));
out.put ((byte) (0x80 | ((value >> 12) & 0x3F)));
out.put ((byte) (0x80 | ((value >> 6) & 0x3F)));
out.put ((byte) (0x80 | ((value ) & 0x3F)));
inPos += 2;
}
else
{
if (remaining < 3)
return CoderResult.OVERFLOW;
out.put ((byte) (0xE0 | (c >> 12)));
out.put ((byte) (0x80 | ((c >> 6) & 0x3F)));
out.put ((byte) (0x80 | (c & 0x3F)));
inPos++;
}
}
return CoderResult.UNDERFLOW;
}
finally
{
// In case we did a get(), then encountered an error, reset the
// position to before the error. If there was no error, this
// will benignly reset the position to the value it already has.
in.position (inPos);
}
}
}
}