| /* |
| * Copyright (C) 2010, Google Inc. 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.io.InputStream; |
| |
| class PackInputStream extends InputStream { |
| private final WindowCursor wc; |
| |
| private final Pack pack; |
| |
| private long pos; |
| |
| PackInputStream(Pack pack, long pos, WindowCursor wc) |
| throws IOException { |
| this.pack = pack; |
| this.pos = pos; |
| this.wc = wc; |
| |
| // Pin the first window, to ensure the pack is open and valid. |
| // |
| wc.pin(pack, pos); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| int n = wc.copy(pack, pos, b, off, len); |
| pos += n; |
| return n; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int read() throws IOException { |
| byte[] buf = new byte[1]; |
| int n = read(buf, 0, 1); |
| return n == 1 ? buf[0] & 0xff : -1; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public void close() { |
| wc.close(); |
| } |
| } |