| /* |
| * 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.internal.storage.file; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| import java.util.zip.DataFormatException; |
| import java.util.zip.Inflater; |
| |
| import org.eclipse.jgit.internal.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(PackFile pack, long o, ByteBuffer b) { |
| super(pack, o, b.capacity()); |
| buffer = b; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected int copy(int p, byte[] b, 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; |
| } |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected int setInput(int pos, 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; |
| } |
| } |