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verified gcc-4.6.4.tar.bz2.sig;
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1 files changed, 429 insertions, 0 deletions

diff --git a/libjava/java/nio/DirectByteBufferImpl.java b/libjava/java/nio/DirectByteBufferImpl.java
new file mode 100644
index 000000000..dd40d5a41
--- /dev/null
+++ b/libjava/java/nio/DirectByteBufferImpl.java
@@ -0,0 +1,429 @@
+/* DirectByteBufferImpl.java -- 
+   Copyright (C) 2003, 2004 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., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 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 java.nio;
+
+import gnu.gcj.RawData;
+
+abstract class DirectByteBufferImpl extends ByteBuffer
+{
+  /**
+   * The owner is used to keep alive the object that actually owns the
+   * memory. There are three possibilities:
+   *  1) owner == this: We allocated the memory and we should free it,
+   *                    but *only* in finalize (if we've been sliced
+   *                    other objects will also have access to the
+   *                    memory).
+   *  2) owner == null: The byte buffer was created thru
+   *                    JNI.NewDirectByteBuffer. The JNI code is
+   *                    responsible for freeing the memory.
+   *  3) owner == some other object: The other object allocated the
+   *                                 memory and should free it.
+   */
+  private final Object owner;
+
+  static final class ReadOnly extends DirectByteBufferImpl
+  {
+    ReadOnly(Object owner, RawData address,
+	     int capacity, int limit,
+	     int position)
+    {
+      super(owner, address, capacity, limit, position);
+    }
+
+    public ByteBuffer put(byte value)
+    {
+      throw new ReadOnlyBufferException ();
+    }
+
+    public ByteBuffer put(int index, byte value)
+    {
+      throw new ReadOnlyBufferException ();
+    }
+
+    public boolean isReadOnly()
+    {
+      return true;
+    }
+  }
+
+  static final class ReadWrite extends DirectByteBufferImpl
+  {
+    ReadWrite(int capacity)
+    {
+      super(capacity);
+    }
+
+    ReadWrite(RawData address, int capacity)
+    {
+      super(address, capacity);
+    }
+    
+    ReadWrite(Object owner, RawData address,
+	      int capacity, int limit,
+	      int position)
+    {
+      super(owner, address, capacity, limit, position);
+    }
+
+    public boolean isReadOnly()
+    {
+      return false;
+    }
+  }
+
+  DirectByteBufferImpl(int capacity)
+  {
+    super(capacity, capacity, 0, -1,
+	  VMDirectByteBuffer.allocate(capacity), null, 0);
+    this.owner = this;
+  }
+
+  DirectByteBufferImpl(RawData address, int capacity)
+  {
+    super(capacity, capacity, 0, -1, address, null, 0);
+    this.owner = null;
+  }
+  
+  DirectByteBufferImpl(Object owner, RawData address,
+		       int capacity, int limit,
+		       int position)
+  {
+    super(capacity, limit, position, -1, address, null, 0);
+    this.owner = owner;
+  }
+
+  /**
+   * Allocates a new direct byte buffer.
+   */ 
+  public static ByteBuffer allocate(int capacity)
+  {
+    return new DirectByteBufferImpl.ReadWrite(capacity);
+  }
+
+  protected void finalize() throws Throwable
+  {
+    if (owner == this)
+        VMDirectByteBuffer.free(address);
+  }
+  
+  public byte get()
+  {
+    checkForUnderflow();
+
+    int pos = position();
+    byte result = VMDirectByteBuffer.get(address, pos);
+    position(pos + 1);
+    return result;
+  }
+
+  public byte get(int index)
+  {
+    checkIndex(index);
+
+    return VMDirectByteBuffer.get(address, index);
+  }
+
+  public ByteBuffer get(byte[] dst, int offset, int length)
+  {
+    checkArraySize(dst.length, offset, length);
+    checkForUnderflow(length);
+
+    int index = position();
+    VMDirectByteBuffer.get(address, index, dst, offset, length);
+    position(index+length);
+
+    return this;
+  }
+
+  public ByteBuffer put(byte value)
+  {
+    checkForOverflow();
+
+    int pos = position();
+    VMDirectByteBuffer.put(address, pos, value);
+    position(pos + 1);
+    return this;
+  }
+  
+  public ByteBuffer put(int index, byte value)
+  {
+    checkIndex(index);
+
+    VMDirectByteBuffer.put(address, index, value);
+    return this;
+  }
+  
+  void shiftDown(int dst_offset, int src_offset, int count)
+  {
+    VMDirectByteBuffer.shiftDown(address, dst_offset, src_offset, count);
+  }
+  
+  public ByteBuffer compact()
+  {
+    checkIfReadOnly();
+    mark = -1;
+    int pos = position();
+    if (pos > 0)
+      {
+	int count = remaining();
+	VMDirectByteBuffer.shiftDown(address, 0, pos, count);
+	position(count);
+	limit(capacity());
+      }
+    else
+      {
+	position(limit());
+	limit(capacity());
+      }
+    return this;
+  }
+
+  public ByteBuffer slice()
+  {
+    int rem = remaining();
+    if (isReadOnly())
+        return new DirectByteBufferImpl.ReadOnly
+      (owner, VMDirectByteBuffer.adjustAddress(address, position()),
+       rem, rem, 0);
+    else
+        return new DirectByteBufferImpl.ReadWrite
+      (owner, VMDirectByteBuffer.adjustAddress(address, position()),
+       rem, rem, 0);
+  }
+
+  private ByteBuffer duplicate(boolean readOnly)
+  {
+    int pos = position();
+    reset();
+    int mark = position();
+    position(pos);
+    DirectByteBufferImpl result;
+    if (readOnly)
+        result = new DirectByteBufferImpl.ReadOnly(owner, address, capacity(),
+                                                   limit(), pos);
+    else
+        result = new DirectByteBufferImpl.ReadWrite(owner, address, capacity(),
+                                                    limit(), pos);
+
+    if (mark != pos)
+      {
+	result.position(mark);
+	result.mark();
+	result.position(pos);
+      }
+    return result;
+  }
+
+  public ByteBuffer duplicate()
+  {
+    return duplicate(isReadOnly());
+  }
+
+  public ByteBuffer asReadOnlyBuffer()
+  {
+    return duplicate(true);
+  }
+
+  public boolean isDirect()
+  {
+    return true;
+  }
+
+  public CharBuffer asCharBuffer()
+  {
+    return new CharViewBufferImpl(this, remaining() >> 1);
+  }
+
+  public ShortBuffer asShortBuffer()
+  {
+    return new ShortViewBufferImpl(this, remaining() >> 1);
+  }
+
+  public IntBuffer asIntBuffer()
+  {
+    return new IntViewBufferImpl(this, remaining() >> 2);
+  }
+
+  public LongBuffer asLongBuffer()
+  {
+    return new LongViewBufferImpl(this, remaining() >> 3);
+  }
+
+  public FloatBuffer asFloatBuffer()
+  {
+    return new FloatViewBufferImpl(this, remaining() >> 2);
+  }
+
+  public DoubleBuffer asDoubleBuffer()
+  {
+    return new DoubleViewBufferImpl(this, remaining() >> 3);
+  }
+
+  public char getChar()
+  {
+    return ByteBufferHelper.getChar(this, order());
+  }
+  
+  public ByteBuffer putChar(char value)
+  {
+    ByteBufferHelper.putChar(this, value, order());
+    return this;
+  }
+  
+  public char getChar(int index)
+  {
+    return ByteBufferHelper.getChar(this, index, order());
+  }
+  
+  public ByteBuffer putChar(int index, char value)
+  {
+    ByteBufferHelper.putChar(this, index, value, order());
+    return this;
+  }
+
+  public short getShort()
+  {
+    return ByteBufferHelper.getShort(this, order());
+  }
+  
+  public ByteBuffer putShort(short value)
+  {
+    ByteBufferHelper.putShort(this, value, order());
+    return this;
+  }
+  
+  public short getShort(int index)
+  {
+    return ByteBufferHelper.getShort(this, index, order());
+  }
+  
+  public ByteBuffer putShort(int index, short value)
+  {
+    ByteBufferHelper.putShort(this, index, value, order());
+    return this;
+  }
+
+  public int getInt()
+  {
+    return ByteBufferHelper.getInt(this, order());
+  }
+  
+  public ByteBuffer putInt(int value)
+  {
+    ByteBufferHelper.putInt(this, value, order());
+    return this;
+  }
+  
+  public int getInt(int index)
+  {
+    return ByteBufferHelper.getInt(this, index, order());
+  }
+  
+  public ByteBuffer putInt(int index, int value)
+  {
+    ByteBufferHelper.putInt(this, index, value, order());
+    return this;
+  }
+
+  public long getLong()
+  {
+    return ByteBufferHelper.getLong(this, order());
+  }
+  
+  public ByteBuffer putLong(long value)
+  {
+    ByteBufferHelper.putLong(this, value, order());
+    return this;
+  }
+  
+  public long getLong(int index)
+  {
+    return ByteBufferHelper.getLong(this, index, order());
+  }
+  
+  public ByteBuffer putLong(int index, long value)
+  {
+    ByteBufferHelper.putLong(this, index, value, order());
+    return this;
+  }
+
+  public float getFloat()
+  {
+    return ByteBufferHelper.getFloat(this, order());
+  }
+  
+  public ByteBuffer putFloat(float value)
+  {
+    ByteBufferHelper.putFloat(this, value, order());
+    return this;
+  }
+  
+  public float getFloat(int index)
+  {
+    return ByteBufferHelper.getFloat(this, index, order());
+  }
+
+  public ByteBuffer putFloat(int index, float value)
+  {
+    ByteBufferHelper.putFloat(this, index, value, order());
+    return this;
+  }
+
+  public double getDouble()
+  {
+    return ByteBufferHelper.getDouble(this, order());
+  }
+
+  public ByteBuffer putDouble(double value)
+  {
+    ByteBufferHelper.putDouble(this, value, order());
+    return this;
+  }
+  
+  public double getDouble(int index)
+  {
+    return ByteBufferHelper.getDouble(this, index, order());
+  }
+  
+  public ByteBuffer putDouble(int index, double value)
+  {
+    ByteBufferHelper.putDouble(this, index, value, order());
+    return this;
+  }
+}