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/*
* Copyright (c) 2020, Peter Elliott <pelliott@ualberta.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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 HOLDER 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.
*/
#pragma once
#include <AK/Span.h>
#include <AK/Stream.h>
#include <LibTar/Tar.h>
namespace Tar {
class TarStream;
class TarFileStream : public InputStream {
public:
size_t read(Bytes) override;
bool unreliable_eof() const override;
bool read_or_error(Bytes) override;
bool discard_or_error(size_t count) override;
private:
TarFileStream(TarStream& stream);
TarStream& m_tar_stream;
int m_generation;
friend class TarStream;
};
class TarStream {
public:
TarStream(InputStream&);
void advance();
bool finished() const { return m_finished; }
bool valid() const;
const Header& header() const { return m_header; }
TarFileStream file_contents();
private:
Header m_header;
InputStream& m_stream;
unsigned long m_file_offset { 0 };
int m_generation { 0 };
bool m_finished { false };
friend class TarFileStream;
};
}
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