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2003-05-27 Michael Koch <konqueror@gmx.de>

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* java/util/zip/Deflater.java
	(FILTERED): Merged documentation from classpath.
	* java/util/zip/DeflaterOutputStream.java
	(DeflaterOutputStream): Merged documentation and argument validity
	check from classpath.
	(deflate): Merged documentation from classpath.
	(finish): Likewise.
	* java/util/zip/Inflater.java
	(Inflater): Merged class documentation from classpath.
	(zstream): Reordered.
	(is_finished): Reordered.
	(dict_needed): Reordered.
	(Inflater): Reordered, merged documentation from classpath.
	(end): Likewise.
	(finalize): Merged documentation from classpath.
	(finished): Likewise.
	(getAdler): Likewise.
	(getRemaining): Likewise.
	(getTotalIn): Likewise.
	(getTotalOut): Likewise.
	(inflate): Likewise.
	(needsDictionary): Likewise.
	(needsInput): Likewise.
	(reset): Likewise.
	(setDictionary): Likewise.
	(setInput): Likewise.

From-SVN: r67185
This commit is contained in:
Michael Koch 2003-05-27 06:34:29 +00:00 committed by Michael Koch
parent 5191f392bb
commit 98ad580793
4 changed files with 278 additions and 70 deletions
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29
libjava/ChangeLog
View File

@ -1,3 +1,32 @@
2003-05-27 Michael Koch <konqueror@gmx.de>
* java/util/zip/Deflater.java
(FILTERED): Merged documentation from classpath.
* java/util/zip/DeflaterOutputStream.java
(DeflaterOutputStream): Merged documentation and argument validity
check from classpath.
(deflate): Merged documentation from classpath.
(finish): Likewise.
* java/util/zip/Inflater.java
(Inflater): Merged class documentation from classpath.
(zstream): Reordered.
(is_finished): Reordered.
(dict_needed): Reordered.
(Inflater): Reordered, merged documentation from classpath.
(end): Likewise.
(finalize): Merged documentation from classpath.
(finished): Likewise.
(getAdler): Likewise.
(getRemaining): Likewise.
(getTotalIn): Likewise.
(getTotalOut): Likewise.
(inflate): Likewise.
(needsDictionary): Likewise.
(needsInput): Likewise.
(reset): Likewise.
(setDictionary): Likewise.
(setInput): Likewise.
2003-05-27 Michael Koch <konqueror@gmx.de>
* java/net/URLConnection.java

5
libjava/java/util/zip/Deflater.java
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@ -48,7 +48,6 @@ import gnu.gcj.RawData;
* and JCL book.
* Believed complete and correct.
*/
public class Deflater
{
/**
@ -73,6 +72,10 @@ public class Deflater
* The default strategy.
*/
public static final int DEFAULT_STRATEGY = 0;
/**
* This strategy will only allow longer string repetitions. It is
* useful for random data with a small character set.
*/
public static final int FILTERED = 1;
/**

32
libjava/java/util/zip/DeflaterOutputStream.java
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@ -56,6 +56,7 @@ import java.io.IOException;
* finishing the stream.
*
* @author Tom Tromey, Jochen Hoenicke
* @date Jan 11, 2001
*/
public class DeflaterOutputStream extends FilterOutputStream
{
@ -65,6 +66,11 @@ public class DeflaterOutputStream extends FilterOutputStream
out.close();
}
/**
* Deflates everything in the def's input buffers. This will call
* <code>def.deflate()</code> until all bytes from the input buffers
* are processed.
*/
protected void deflate () throws IOException
{
do
@ -76,23 +82,49 @@ public class DeflaterOutputStream extends FilterOutputStream
while (! def.needsInput());
}
/**
* Creates a new DeflaterOutputStream with a default Deflater and
* default buffer size.
* @param out the output stream where deflated output should be written.
*/
public DeflaterOutputStream (OutputStream out)
{
this (out, new Deflater (), 512);
}
/**
* Creates a new DeflaterOutputStream with the given Deflater and
* default buffer size.
* @param out the output stream where deflated output should be written.
* @param defl the underlying deflater.
*/
public DeflaterOutputStream (OutputStream out, Deflater defl)
{
this (out, defl, 512);
}
/**
* Creates a new DeflaterOutputStream with the given Deflater and
* buffer size.
* @param out the output stream where deflated output should be written.
* @param defl the underlying deflater.
* @param bufsize the buffer size.
* @exception IllegalArgumentException if bufsize isn't positive.
*/
public DeflaterOutputStream(OutputStream out, Deflater defl, int bufsize)
{
super (out);
if (bufsize <= 0)
throw new IllegalArgumentException("bufsize <= 0");
buf = new byte[bufsize];
def = defl;
}
/**
* Finishes the stream by calling finish() on the deflater. This
* was the only way to ensure that all bytes are flushed in Sun's
* JDK.
*/
public void finish () throws IOException
{
if (inbufLength > 0)

282
libjava/java/util/zip/Inflater.java
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@ -1,5 +1,5 @@
/* Inflater.java - Decompress a data stream
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
Copyright (C) 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
This file is part of GNU Classpath.
@ -39,81 +39,37 @@ package java.util.zip;
import gnu.gcj.RawData;
/**
* @author Tom Tromey
* @date May 17, 1999
*/
/* Written using on-line Java Platform 1.2 API Specification
* and JCL book.
* Believed complete and correct.
*/
/**
* Inflater is used to decompress data that has been compressed according
* to the "deflate" standard described in rfc1950.
*
* The usage is as following. First you have to set some input with
* <code>setInput()</code>, then inflate() it. If inflate doesn't
* inflate any bytes there may be three reasons:
* <ul>
* <li>needsInput() returns true because the input buffer is empty.
* You have to provide more input with <code>setInput()</code>.
* NOTE: needsInput() also returns true when, the stream is finished.
* </li>
* <li>needsDictionary() returns true, you have to provide a preset
* dictionary with <code>setDictionary()</code>.</li>
* <li>finished() returns true, the inflater has finished.</li>
* </ul>
* Once the first output byte is produced, a dictionary will not be
* needed at a later stage.
*
* @author John Leuner, Jochen Hoenicke
* @author Tom Tromey
* @date May 17, 1999
* @since JDK 1.1
*/
public class Inflater
{
public native void end ();
protected void finalize ()
{
end ();
}
public synchronized boolean finished ()
{
return is_finished;
}
public native int getAdler ();
public native int getRemaining ();
public native int getTotalIn ();
public native int getTotalOut ();
public int inflate (byte[] buf) throws DataFormatException
{
return inflate (buf, 0, buf.length);
}
public native int inflate (byte[] buf, int off, int len)
throws DataFormatException;
private native void init (boolean noHeader);
public Inflater ()
{
this (false);
}
public Inflater (boolean noHeader)
{
init (noHeader);
}
public synchronized boolean needsDictionary ()
{
return dict_needed;
}
public synchronized boolean needsInput ()
{
return getRemaining () == 0;
}
public native void reset ();
public void setDictionary (byte[] buf)
{
setDictionary (buf, 0, buf.length);
}
public native void setDictionary (byte[] buf, int off, int len);
public void setInput (byte[] buf)
{
setInput (buf, 0, buf.length);
}
public native void setInput (byte[] buf, int off, int len);
// The zlib stream.
private RawData zstream;
@ -122,4 +78,192 @@ public class Inflater
// True if dictionary needed.
private boolean dict_needed;
/**
* Creates a new inflater.
*/
public Inflater ()
{
this (false);
}
/**
* Creates a new inflater.
* @param nowrap true if no header and checksum field appears in the
* stream. This is used for GZIPed input. For compatibility with
* Sun JDK you should provide one byte of input more than needed in
* this case.
*/
public Inflater (boolean noHeader)
{
init (noHeader);
}
/**
* Finalizes this object.
*/
protected void finalize ()
{
end ();
}
/**
* Frees all objects allocated by the inflater. There's no reason
* to call this, since you can just rely on garbage collection (even
* for the Sun implementation). Exists only for compatibility
* with Sun's JDK, where the compressor allocates native memory.
* If you call any method (even reset) afterwards the behaviour is
* <i>undefined</i>.
* @deprecated Just clear all references to inflater instead.
*/
public native void end ();
/**
* Returns true, if the inflater has finished. This means, that no
* input is needed and no output can be produced.
*/
public synchronized boolean finished ()
{
return is_finished;
}
/**
* Gets the adler checksum. This is either the checksum of all
* uncompressed bytes returned by inflate(), or if needsDictionary()
* returns true (and thus no output was yet produced) this is the
* adler checksum of the expected dictionary.
* @returns the adler checksum.
*/
public native int getAdler ();
/**
* Gets the number of unprocessed input. Useful, if the end of the
* stream is reached and you want to further process the bytes after
* the deflate stream.
* @return the number of bytes of the input which were not processed.
*/
public native int getRemaining ();
/**
* Gets the total number of processed compressed input bytes.
* @return the total number of bytes of processed input bytes.
*/
public native int getTotalIn ();
/**
* Gets the total number of output bytes returned by inflate().
* @return the total number of output bytes.
*/
public native int getTotalOut ();
/**
* Inflates the compressed stream to the output buffer. If this
* returns 0, you should check, whether needsDictionary(),
* needsInput() or finished() returns true, to determine why no
* further output is produced.
* @param buffer the output buffer.
* @return the number of bytes written to the buffer, 0 if no further
* output can be produced.
* @exception DataFormatException if deflated stream is invalid.
* @exception IllegalArgumentException if buf has length 0.
*/
public int inflate (byte[] buf) throws DataFormatException
{
return inflate (buf, 0, buf.length);
}
/**
* Inflates the compressed stream to the output buffer. If this
* returns 0, you should check, whether needsDictionary(),
* needsInput() or finished() returns true, to determine why no
* further output is produced.
* @param buffer the output buffer.
* @param off the offset into buffer where the output should start.
* @param len the maximum length of the output.
* @return the number of bytes written to the buffer, 0 if no further
* output can be produced.
* @exception DataFormatException if deflated stream is invalid.
* @exception IndexOutOfBoundsException if the off and/or len are wrong.
*/
public native int inflate (byte[] buf, int off, int len)
throws DataFormatException;
private native void init (boolean noHeader);
/**
* Returns true, if a preset dictionary is needed to inflate the input.
*/
public synchronized boolean needsDictionary ()
{
return dict_needed;
}
/**
* Returns true, if the input buffer is empty.
* You should then call setInput(). <br>
*
* <em>NOTE</em>: This method also returns true when the stream is finished.
*/
public synchronized boolean needsInput ()
{
return getRemaining () == 0;
}
/**
* Resets the inflater so that a new stream can be decompressed. All
* pending input and output will be discarded.
*/
public native void reset ();
/**
* Sets the preset dictionary. This should only be called, if
* needsDictionary() returns true and it should set the same
* dictionary, that was used for deflating. The getAdler()
* function returns the checksum of the dictionary needed.
* @param buffer the dictionary.
* @exception IllegalStateException if no dictionary is needed.
* @exception IllegalArgumentException if the dictionary checksum is
* wrong.
*/
public void setDictionary (byte[] buf)
{
setDictionary (buf, 0, buf.length);
}
/**
* Sets the preset dictionary. This should only be called, if
* needsDictionary() returns true and it should set the same
* dictionary, that was used for deflating. The getAdler()
* function returns the checksum of the dictionary needed.
* @param buffer the dictionary.
* @param off the offset into buffer where the dictionary starts.
* @param len the length of the dictionary.
* @exception IllegalStateException if no dictionary is needed.
* @exception IllegalArgumentException if the dictionary checksum is
* wrong.
* @exception IndexOutOfBoundsException if the off and/or len are wrong.
*/
public native void setDictionary (byte[] buf, int off, int len);
/**
* Sets the input. This should only be called, if needsInput()
* returns true.
* @param buffer the input.
* @exception IllegalStateException if no input is needed.
*/
public void setInput (byte[] buf)
{
setInput (buf, 0, buf.length);
}
/**
* Sets the input. This should only be called, if needsInput()
* returns true.
* @param buffer the input.
* @param off the offset into buffer where the input starts.
* @param len the length of the input.
* @exception IllegalStateException if no input is needed.
* @exception IndexOutOfBoundsException if the off and/or len are wrong.
*/
public native void setInput (byte[] buf, int off, int len);
}