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

2002-11-18  Michael Koch <konqueror@gmx.de>

	* gnu/java/nio/ByteBufferImpl.java,
	gnu/java/nio/CharBufferImpl.java,
	gnu/java/nio/DatagramChannelImpl.java,
	gnu/java/nio/DoubleBufferImpl.java,
	gnu/java/nio/FileChannelImpl.java,
	gnu/java/nio/FloatBufferImpl.java,
	gnu/java/nio/IntBufferImpl.java,
	gnu/java/nio/LongBufferImpl.java,
	gnu/java/nio/PipeImpl.java,
	gnu/java/nio/SelectionKeyImpl.java,
	gnu/java/nio/SelectorImpl.java,
	gnu/java/nio/SelectorProviderImpl.java,
	gnu/java/nio/ServerSocketChannelImpl.java,
	gnu/java/nio/ShortBufferImpl.java,
	gnu/java/nio/SocketChannelImpl.java,
	java/nio/DoubleBuffer.java,
	java/nio/FloatBuffer.java,
	java/nio/IntBuffer.java,
	java/nio/LongBuffer.java,
	java/nio/ShortBuffer.java,
	java/nio/channels/FileChannel.java: New files.

From-SVN: r59216

libjava/gnu/java/nio/FileChannelImpl.java

@@ -0,0 +1,234 @@
+/* FileChannelImpl.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;
+
+import java.io.EOFException;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.nio.channels.FileChannel;
+
+/**
+ * This file is not user visible !
+ * But alas, Java does not have a concept of friendly packages
+ * so this class is public. 
+ * Instances of this class are created by invoking getChannel
+ * Upon a Input/Output/RandomAccessFile object.
+ */
+
+public class FileChannelImpl extends FileChannel
+{
+  public long address;
+  public int length;
+  public int fd;
+  public MappedByteBuffer buf;
+  public Object file_obj; // just to keep it live...
+
+  /**
+   * This method came from java.io.RandomAccessFile
+   * It is private there so we will repeat it here.
+   */
+//   private native long lengthInternal (int native_fd) throws IOException;
+  private long lengthInternal (int native_fd) throws IOException
+  {
+    return 0;
+  };
+
+  public FileChannelImpl (int fd, Object obj)
+  {
+    this.fd = fd;
+    this.file_obj = obj;
+  }
+
+  public long size () throws IOException
+  {
+    return lengthInternal (fd);
+  }
+    
+  protected void implCloseChannel()  throws IOException
+  {
+    if (address != 0)
+	    {
+        nio_unmmap_file (fd, address, (int) length);
+	    }
+
+    // FIXME
+    fd = 0;
+
+    if (file_obj instanceof RandomAccessFile)
+	    {
+        RandomAccessFile o = (RandomAccessFile) file_obj;
+        o.close();
+	    }
+    else if (file_obj instanceof FileInputStream)
+	    {
+        FileInputStream o = (FileInputStream) file_obj;
+        o.close();
+	    }
+    else if (file_obj instanceof FileOutputStream)
+	    {
+        FileOutputStream o = (FileOutputStream) file_obj;
+        o.close();
+	    }
+  }
+
+  public int read (ByteBuffer dst) throws IOException
+  {
+    int w = 0;
+    int s = (int)size();
+
+    if (buf == null)
+	    {
+        throw new EOFException("file not mapped");
+	    }
+
+    for (int i=0; i<s; i++)
+	    {
+        dst.put( buf.get() );
+	    }
+
+    return s;
+  }
+
+  public long read (ByteBuffer[] dsts) throws IOException
+  {
+    return read (dsts, 0, dsts.length);
+  }
+
+  public long read (ByteBuffer[] dsts, int offset, int length)
+    throws IOException
+  {
+    long result = 0;
+
+    for (int i = offset; i < offset + length; i++)
+	    {
+        result += write (dsts[i]);
+	    }
+
+    return result;
+  }
+
+  public int write (ByteBuffer src) throws IOException
+  {
+    int w = 0;
+
+    if (buf == null)
+	    {
+        throw new EOFException ("file not mapped");
+	    }
+
+    while (src.hasRemaining ())
+	    {
+        buf.put (src.get ());
+        w++;
+	    }
+
+    return w;
+  }
+    
+  public long write(ByteBuffer[] srcs, int offset, int length)
+    throws IOException
+  {
+    long res = 0;
+
+    for (int i = offset;i < offset + length;i++)
+	    {
+        res += write (srcs[i]);
+	    }
+	return res;
+    }
+				   
+  public MappedByteBuffer map (FileChannel.MapMode mode, long position,
+                               long size)
+    throws IOException
+  {
+//     int cmode = mode.m;
+//     address = nio_mmap_file (fd, position, size, cmode);
+//     length = size;
+//     buf = new MappedByteFileBuffer (this);
+//     return buf;
+    return null;
+  }
+
+  static MappedByteBuffer create_direct_mapped_buffer (long address,
+                                                       long length)
+  {
+//     FileChannelImpl ch = new FileChannelImpl (-1, null);
+//     ch.address = address;
+//     ch.length = (int) length;
+//     ch.buf = new MappedByteFileBuffer (ch);
+//     return ch.buf;			 
+    return null;
+  }
+
+  public long write (ByteBuffer[] srcs)
+    throws IOException
+  {
+    return write (srcs, 0, srcs.length);
+  }
+				   
+  /**
+   * msync with the disk
+   */
+  public void force (boolean metaData)
+  {
+    nio_msync (fd, address, length);
+  }
+
+//   static native long nio_mmap_file (int fd, long pos, int size, int mode);
+
+//   static native void nio_unmmap_file (int fd, long address, int size);
+
+//   static native void nio_msync (int fd, long address, int length);
+
+  static long nio_mmap_file (int fd, long pos, int size, int mode)
+  {
+    return 0;
+  }
+
+  static void nio_unmmap_file (int fd, long address, int size)
+  {
+  };
+
+  static void nio_msync (int fd, long address, int length)
+  {
+  };
+}