including jazzlib into classpath tree

1 files changed, 187 insertions, 0 deletions

diff --git a/java/util/zip/DeflaterOutputStream.java b/java/util/zip/DeflaterOutputStream.java
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+/* java.util.zip.DeflaterOutputStream
+   Copyright (C) 2001 Free Software Foundation, Inc.
+
+This file is part of Jazzlib.
+
+Jazzlib 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.
+
+Jazzlib 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.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package java.util.zip;
+
+import java.io.FilterOutputStream;
+import java.io.OutputStream;
+import java.io.IOException;
+
+/* 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
+ * @date Jan 11, 2001 
+ */
+public class DeflaterOutputStream extends FilterOutputStream
+{
+  /** 
+   * This buffer is used temporarily to retrieve the bytes from the
+   * deflater and write them to the underlying output stream.  
+   */
+  protected byte[] buf;
+
+  /** 
+   * The deflater which is used to deflate the stream.
+   */
+  protected Deflater def;
+
+  /**
+   * 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
+  {
+    while (! def.needsInput())
+      {
+	int len = def.deflate(buf, 0, buf.length);
+
+	//	System.err.println("DOS deflated " + len + " out of " + buf.length);
+	if (len <= 0)
+	  break;
+	out.write(buf, 0, len);
+      }
+
+    if (! def.needsInput())
+      throw new InternalError("Can't deflate all input?");
+  }
+
+  /** 
+   * 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;
+  }
+
+  /**  
+   * Flushes the stream by calling flush() on the deflater and then
+   * on the underlying stream.  This ensures that all bytes are
+   * flushed.  This function doesn't work in Sun's JDK, but only in
+   * jazzlib.
+   */
+  public void flush() throws IOException
+  {
+    def.flush();
+    deflate();
+    out.flush();
+  }
+
+  /**
+   * 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
+  {
+    def.finish();
+    while (! def.finished())
+      {
+	int len = def.deflate(buf, 0, buf.length);
+	if (len <= 0)
+	  break;
+	out.write(buf, 0, len);
+      }
+    if (! def.finished())
+      throw new InternalError("Can't deflate all input?");
+    out.flush();
+  }
+
+  /**
+   * Calls finish () and closes the stream. 
+   */
+  public void close() throws IOException
+  {
+    finish();
+    out.close();
+  }
+
+  /**
+   * Writes a single byte to the compressed output stream.
+   * @param bval the byte value.
+   */
+  public void write(int bval) throws IOException
+  {
+    byte[] b = new byte[1];
+    b[0] = (byte) bval;
+    write(b, 0, 1);
+  }
+
+  /**
+   * Writes a len bytes from an array to the compressed stream.
+   * @param buf the byte array.
+   * @param off the offset into the byte array where to start.
+   * @param len the number of bytes to write.
+   */
+  public void write(byte[] buf, int off, int len) throws IOException
+  {
+    //    System.err.println("DOS with off " + off + " and len " + len);
+    def.setInput(buf, off, len);
+    deflate();
+  }
+}