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- /*
- * Copyright (C) 2008-2009, Google Inc.
- * Copyright (C) 2007, Robin Rosenberg <robin.rosenberg@dewire.com>
- * Copyright (C) 2006-2008, Shawn O. Pearce <spearce@spearce.org>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- package org.eclipse.jgit.storage.file;
-
- import java.io.IOException;
- import java.nio.ByteBuffer;
- import java.util.zip.DataFormatException;
- import java.util.zip.Inflater;
-
- import org.eclipse.jgit.storage.pack.PackOutputStream;
-
- /**
- * A window for accessing git packs using a {@link ByteBuffer} for storage.
- *
- * @see ByteWindow
- */
- final class ByteBufferWindow extends ByteWindow {
- private final ByteBuffer buffer;
-
- ByteBufferWindow(final PackFile pack, final long o, final ByteBuffer b) {
- super(pack, o, b.capacity());
- buffer = b;
- }
-
- @Override
- protected int copy(final int p, final byte[] b, final int o, int n) {
- final ByteBuffer s = buffer.slice();
- s.position(p);
- n = Math.min(s.remaining(), n);
- s.get(b, o, n);
- return n;
- }
-
- @Override
- void write(PackOutputStream out, long pos, int cnt) throws IOException {
- final ByteBuffer s = buffer.slice();
- s.position((int) (pos - start));
-
- while (0 < cnt) {
- byte[] buf = out.getCopyBuffer();
- int n = Math.min(cnt, buf.length);
- s.get(buf, 0, n);
- out.write(buf, 0, n);
- cnt -= n;
- }
- }
-
- @Override
- protected int setInput(final int pos, final Inflater inf)
- throws DataFormatException {
- final ByteBuffer s = buffer.slice();
- s.position(pos);
- final byte[] tmp = new byte[Math.min(s.remaining(), 512)];
- s.get(tmp, 0, tmp.length);
- inf.setInput(tmp, 0, tmp.length);
- return tmp.length;
- }
- }
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