Deflater.java, [...]: Partly merged with classpath.

2003-04-29  Michael Koch  <konqueror@gmx.de>

	* java/util/zip/Deflater.java,
	java/util/zip/DeflaterOutputStream.java:
	Partly merged with classpath.

From-SVN: r66207

libjava/ChangeLog

+2003-04-29  Michael Koch  <konqueror@gmx.de>
+
+	* java/util/zip/Deflater.java,
+	java/util/zip/DeflaterOutputStream.java:
+	Partly merged with classpath.
+
 2003-04-27  Tom Tromey  <tromey@redhat.com>
 
 	* java/lang/natString.cc (_Jv_AllocString): Initialize

libjava/java/util/zip/Deflater.java

@@ -7,7 +7,7 @@ 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
@@ -51,15 +51,41 @@ import gnu.gcj.RawData;
 
 public class Deflater
 {
+  /**
+   * The best and slowest compression level.  This tries to find very
+   * long and distant string repetitions.  
+   */
   public static final int BEST_COMPRESSION = 9;
+  /**
+   * The worst but fastest compression level.  
+   */
   public static final int BEST_SPEED = 1;
+  /**
+   * The default compression level.
+   */
   public static final int DEFAULT_COMPRESSION = -1;
+  /**
+   * This level won't compress at all but output uncompressed blocks.
+   */
   public static final int NO_COMPRESSION = 0;
 
+  /**
+   * The default strategy.
+   */
   public static final int DEFAULT_STRATEGY = 0;
   public static final int FILTERED = 1;
+
+  /** 
+   * This strategy will not look for string repetitions at all.  It
+   * only encodes with Huffman trees (which means, that more common
+   * characters get a smaller encoding.  
+   */
   public static final int HUFFMAN_ONLY = 2;
 
+  /**
+   * The compression method.  This is the only method supported so far.
+   * There is no need to use this constant at all.
+   */
   public static final int DEFLATED = 8;
 
   public int deflate (byte[] buf)

libjava/java/util/zip/DeflaterOutputStream.java

@@ -7,7 +7,7 @@ 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
@@ -41,16 +41,22 @@ import java.io.FilterOutputStream;
 import java.io.OutputStream;
 import java.io.IOException;
 
-/**
- * @author Tom Tromey
- * @date May 17, 1999
- */
-
 /* Written using on-line Java Platform 1.2 API Specification
  * and JCL book.
  * Believed complete and correct.
  */
 
+/**
+ * This is a special FilterOutputStream deflating the bytes that are
+ * written through it.  It uses the Deflater for deflating.
+ *
+ * A special thing to be noted is that flush() doesn't flush
+ * everything in Sun's JDK, but it does so in jazzlib. This is because
+ * Sun's Deflater doesn't have a way to flush() everything, without
+ * finishing the stream.
+ *
+ * @author Tom Tromey, Jochen Hoenicke
+ */
 public class DeflaterOutputStream extends FilterOutputStream
 {
   public void close () throws IOException