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