| /* |
| * 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 others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.internal.storage.file; |
| |
| import java.io.IOException; |
| import java.util.zip.CRC32; |
| import java.util.zip.DataFormatException; |
| import java.util.zip.Inflater; |
| |
| import org.eclipse.jgit.internal.storage.pack.PackOutputStream; |
| |
| /** |
| * A {@link ByteWindow} with an underlying byte array for storage. |
| */ |
| final class ByteArrayWindow extends ByteWindow { |
| private final byte[] array; |
| |
| ByteArrayWindow(Pack pack, long o, byte[] b) { |
| super(pack, o, b.length); |
| array = b; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected int copy(int p, byte[] b, int o, int n) { |
| n = Math.min(array.length - p, n); |
| System.arraycopy(array, p, b, o, n); |
| return n; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| protected int setInput(int pos, Inflater inf) |
| throws DataFormatException { |
| int n = array.length - pos; |
| inf.setInput(array, pos, n); |
| return n; |
| } |
| |
| void crc32(CRC32 out, long pos, int cnt) { |
| out.update(array, (int) (pos - start), cnt); |
| } |
| |
| @Override |
| void write(PackOutputStream out, long pos, int cnt) |
| throws IOException { |
| int ptr = (int) (pos - start); |
| out.write(array, ptr, cnt); |
| } |
| |
| void check(Inflater inf, byte[] tmp, long pos, int cnt) |
| throws DataFormatException { |
| inf.setInput(array, (int) (pos - start), cnt); |
| while (inf.inflate(tmp, 0, tmp.length) > 0) |
| continue; |
| } |
| } |