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//
// AutoDetectStream.h
//
// Library: Zip
// Package: Zip
// Module: AutoDetectStream
//
// Definition of the AutoDetectStream class.
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#ifndef Zip_AutoDetectStream_INCLUDED
#define Zip_AutoDetectStream_INCLUDED
#include "Poco/Zip/Zip.h"
#include "Poco/BufferedStreamBuf.h"
#include <istream>
namespace Poco {
namespace Zip {
class Zip_API AutoDetectStreamBuf: public Poco::BufferedStreamBuf
/// AutoDetectStreamBuf automatically detects the end of a stream using the
/// Data Descriptor signature.
{
public:
AutoDetectStreamBuf(std::istream& in, const std::string& prefix, const std::string& postfix, bool reposition, Poco::UInt32 start, bool needsZip64);
/// Creates the AutoDetectStream.
~AutoDetectStreamBuf();
/// Destroys the AutoDetectStream.
protected:
int readFromDevice(char* buffer, std::streamsize length);
int writeToDevice(const char* buffer, std::streamsize length);
private:
enum
{
STREAM_BUFFER_SIZE = 1024
};
std::istream* _pIstr;
bool _eofDetected;
int _matchCnt;
std::string _prefix;
std::string _postfix;
bool _reposition;
Poco::UInt32 _start;
bool _needsZip64;
Poco::UInt64 _length;
};
class Zip_API AutoDetectIOS: public virtual std::ios
/// The base class for AutoDetectInputStream and AutoDetectOutputStream.
///
/// This class is needed to ensure the correct initialization
/// order of the stream buffer and base classes.
{
public:
AutoDetectIOS(std::istream& istr, const std::string& prefix, const std::string& postfix, bool reposition, Poco::UInt32 start, bool needsZip64);
/// Creates the basic stream and connects it
/// to the given input stream.
~AutoDetectIOS();
/// Destroys the stream.
AutoDetectStreamBuf* rdbuf();
/// Returns a pointer to the underlying streambuf.
protected:
AutoDetectStreamBuf _buf;
};
class Zip_API AutoDetectInputStream: public AutoDetectIOS, public std::istream
/// AutoDetectInputStream automatically detects the end of a stream using the
/// Data Descriptor signature.
{
public:
AutoDetectInputStream(std::istream& istr, const std::string& prefix = std::string(), const std::string& postfix = std::string(), bool reposition = false, Poco::UInt32 start = 0, bool needsZip64 = false);
/// Creates the AutoDetectInputStream and connects it to the underlying stream.
~AutoDetectInputStream();
/// Destroys the AutoDetectInputStream.
};
} } // namespace Poco::Zip
#endif // Zip_AutoDetectStream_INCLUDED
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