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/*
* 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.dfs;
import java.io.IOException;
import java.io.InputStream;
final class PackInputStream extends InputStream {
final DfsReader ctx;
private final DfsPackFile pack;
private long pos;
PackInputStream(DfsPackFile pack, long pos, DfsReader ctx)
throws IOException {
this.pack = pack;
this.pos = pos;
this.ctx = ctx;
// Pin the first window, to ensure the pack is open and valid.
//
ctx.pin(pack, pos);
}
@Override
public int read(byte[] b, int off, int len) throws IOException {
int n = ctx.copy(pack, pos, b, off, len);
pos += n;
return n;
}
@Override
public int read() throws IOException {
byte[] buf = new byte[1];
int n = read(buf, 0, 1);
return n == 1 ? buf[0] & 0xff : -1;
}
@Override
public void close() {
ctx.close();
}
}
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