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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [java/] [nio/] [LongBufferImpl.java] - Blame information for rev 771

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1 771 jeremybenn
/* LongBufferImpl.java --
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   Copyright (C) 2002, 2003, 2004, 2005  Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING.  If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library.  Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module.  An independent module is a module which is not derived from
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or based on this library.  If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so.  If you do not wish to do so, delete this
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exception statement from your version. */
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package java.nio;
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/**
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 * This is a Heap memory implementation
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 */
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final class LongBufferImpl extends LongBuffer
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{
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  private final boolean readOnly;
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  LongBufferImpl (int capacity)
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  {
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    this (new long [capacity], 0, capacity, capacity, 0, -1, false);
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  }
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  LongBufferImpl (long[] buffer, int offset, int capacity, int limit,
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                  int position, int mark, boolean readOnly)
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  {
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    super (capacity, limit, position, mark, null, buffer, offset);
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    this.readOnly = readOnly;
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  }
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  public boolean isReadOnly ()
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  {
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    return readOnly;
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  }
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  public LongBuffer slice ()
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  {
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    return new LongBufferImpl (backing_buffer, array_offset + position (),
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                               remaining (), remaining (), 0, -1, isReadOnly ());
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  }
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  public LongBuffer duplicate ()
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  {
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    return new LongBufferImpl (backing_buffer, array_offset, capacity (), limit (),
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                               position (), mark, isReadOnly ());
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  }
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  public LongBuffer asReadOnlyBuffer ()
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  {
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    return new LongBufferImpl (backing_buffer, array_offset, capacity (), limit (),
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                               position (), mark, true);
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  }
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  public LongBuffer compact ()
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  {
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    checkIfReadOnly();
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    mark = -1;
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    int p = position();
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    int n = limit() - p;
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    if (n > 0)
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      {
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        System.arraycopy(backing_buffer, array_offset + p,
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                         backing_buffer, array_offset, n);
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      }
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    position(n);
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    limit(capacity());
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    return this;
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  }
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  public boolean isDirect ()
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  {
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    return false;
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  }
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  /**
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   * Reads the <code>long</code> at this buffer's current position,
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   * and then increments the position.
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   *
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   * @exception BufferUnderflowException If there are no remaining
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   * <code>longs</code> in this buffer.
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   */
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  public long get ()
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  {
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    checkForUnderflow();
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    long result = backing_buffer [position ()];
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    position (position () + 1);
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    return result;
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  }
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  /**
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   * Relative put method. Writes <code>value</code> to the next position
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   * in the buffer.
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   *
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   * @exception BufferOverflowException If there is insufficient space in this
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   * buffer.
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   * @exception ReadOnlyBufferException If this buffer is read-only.
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   */
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  public LongBuffer put (long value)
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  {
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    checkIfReadOnly();
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    checkForOverflow();
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    backing_buffer [position ()] = value;
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    position (position () + 1);
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    return this;
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  }
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  /**
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   * Absolute get method. Reads the <code>long</code> at position
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   * <code>index</code>.
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   *
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   * @exception IndexOutOfBoundsException If index is negative or not smaller
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   * than the buffer's limit.
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   */
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  public long get (int index)
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  {
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    checkIndex(index);
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    return backing_buffer [index];
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  }
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  /**
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   * Absolute put method. Writes <code>value</code> to position
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   * <code>index</code> in the buffer.
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   *
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   * @exception IndexOutOfBoundsException If index is negative or not smaller
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   * than the buffer's limit.
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   * @exception ReadOnlyBufferException If this buffer is read-only.
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   */
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  public LongBuffer put (int index, long value)
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  {
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    checkIfReadOnly();
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    checkIndex(index);
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    backing_buffer [index] = value;
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    return this;
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  }
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  public ByteOrder order ()
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  {
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    return ByteOrder.nativeOrder ();
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  }
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}

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