Initial revision

From-SVN: r102074

libjava/classpath/java/nio/IntBufferImpl.java

@@ -0,0 +1,172 @@
+/* IntBufferImpl.java -- 
+   Copyright (C) 2002, 2003, 2004, 2005  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;
+
+/**
+ * This is a Heap memory implementation
+ */
+final class IntBufferImpl extends IntBuffer
+{
+  private boolean readOnly;
+
+  IntBufferImpl (int capacity)
+  {
+    this (new int [capacity], 0, capacity, capacity, 0, -1, false);
+  }
+  
+  IntBufferImpl (int[] buffer, int offset, int capacity, int limit, int position, int mark, boolean readOnly)
+  {
+    super (capacity, limit, position, mark);
+    this.backing_buffer = buffer;
+    this.array_offset = offset;
+    this.readOnly = readOnly;
+  }
+  
+  public boolean isReadOnly ()
+  {
+    return readOnly;
+  }
+  
+  public IntBuffer slice ()
+  {
+    return new IntBufferImpl (backing_buffer, array_offset + position (), remaining (), remaining (), 0, -1, isReadOnly ());
+  }
+  
+  public IntBuffer duplicate ()
+  {
+    return new IntBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, isReadOnly ());
+  }
+  
+  public IntBuffer asReadOnlyBuffer ()
+  {
+    return new IntBufferImpl (backing_buffer, array_offset, capacity (), limit (), position (), mark, true);
+  }
+  
+  public IntBuffer compact ()
+  {
+    checkIfReadOnly();
+    mark = -1;
+    int copied = 0;
+    
+    while (remaining () > 0)
+      {
+	put (copied, get ());
+	copied++;
+      }
+
+    position (copied);
+    limit(capacity());
+    return this;
+  }
+  
+  public boolean isDirect ()
+  {
+    return false;
+  }
+
+  /**
+   * Reads the <code>int</code> at this buffer's current position,
+   * and then increments the position.
+   *
+   * @exception BufferUnderflowException If there are no remaining
+   * <code>ints</code> in this buffer.
+   */
+  public int get ()
+  {
+    checkForUnderflow();
+
+    int result = backing_buffer [position ()];
+    position (position () + 1);
+    return result;
+  }
+  
+  /**
+   * Relative put method. Writes <code>value</code> to the next position
+   * in the buffer.
+   *
+   * @exception BufferOverflowException If there no remaining 
+   * space in this buffer.
+   * @exception ReadOnlyBufferException If this buffer is read-only.
+   */
+  public IntBuffer put (int value)
+  {
+    checkIfReadOnly();
+    checkForOverflow();
+
+    backing_buffer [position ()] = value;
+    position (position () + 1);
+    return this;
+  }
+  
+  /**
+   * Absolute get method. Reads the <code>int</code> at position
+   * <code>index</code>.
+   *
+   * @exception IndexOutOfBoundsException If index is negative or not smaller
+   * than the buffer's limit.
+   */
+  public int get (int index)
+  {
+    checkIndex(index);
+
+    return backing_buffer [index];
+  }
+  
+  /**
+   * Absolute put method. Writes <code>value</code> to position
+   * <code>index</code> in the buffer.
+   *
+   * @exception IndexOutOfBoundsException If index is negative or not smaller
+   * than the buffer's limit.
+   * @exception ReadOnlyBufferException If this buffer is read-only.
+   */
+  public IntBuffer put (int index, int value)
+  {
+    checkIfReadOnly();
+    checkIndex(index);
+
+    backing_buffer [index] = value;
+    return this;
+  }
+  
+  public ByteOrder order ()
+  {
+    return ByteOrder.nativeOrder ();
+  }
+}