#ifndef CRYPTOPP_MQUEUE_H#define CRYPTOPP_MQUEUE_H#include "queue.h"#include "filters.h"#include <deque>NAMESPACE_BEGIN(CryptoPP)//! Message Queueclass MessageQueue : public AutoSignaling<BufferedTransformation>{public:	MessageQueue(unsigned int nodeSize=256);	void IsolatedInitialize(const NameValuePairs &parameters)		{m_queue.IsolatedInitialize(parameters); m_lengths.assign(1, 0U); m_messageCounts.assign(1, 0U);}	unsigned int Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking)	{		m_queue.Put(begin, length);		m_lengths.back() += length;		if (messageEnd)		{			m_lengths.push_back(0);			m_messageCounts.back()++;		}		return 0;	}	bool IsolatedFlush(bool hardFlush, bool blocking) {return false;}	bool IsolatedMessageSeriesEnd(bool blocking)		{m_messageCounts.push_back(0); return false;}	unsigned long MaxRetrievable() const		{return m_lengths.front();}	bool AnyRetrievable() const		{return m_lengths.front() > 0;}	unsigned int TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel=NULL_CHANNEL, bool blocking=true);	unsigned int CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end=ULONG_MAX, const std::string &channel=NULL_CHANNEL, bool blocking=true) const;	unsigned long TotalBytesRetrievable() const		{return m_queue.MaxRetrievable();}	unsigned int NumberOfMessages() const		{return m_lengths.size()-1;}	bool GetNextMessage();	unsigned int NumberOfMessagesInThisSeries() const		{return m_messageCounts[0];}	unsigned int NumberOfMessageSeries() const		{return m_messageCounts.size()-1;}	unsigned int CopyMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=NULL_CHANNEL) const;	const byte * Spy(unsigned int &contiguousSize) const;	void swap(MessageQueue &rhs);private:	ByteQueue m_queue;	std::deque<unsigned long> m_lengths, m_messageCounts;};//! A filter that checks messages on two channels for equalityclass EqualityComparisonFilter : public Unflushable<Multichannel<Filter> >{public:	struct MismatchDetected : public Exception {MismatchDetected() : Exception(DATA_INTEGRITY_CHECK_FAILED, "EqualityComparisonFilter: did not receive the same data on two channels") {}};	/*! if throwIfNotEqual is false, this filter will output a '\0' byte when it detects a mismatch, '\1' otherwise */	EqualityComparisonFilter(BufferedTransformation *attachment=NULL, bool throwIfNotEqual=true, const std::string &firstChannel="0", const std::string &secondChannel="1")		: Unflushable<Multichannel<Filter> >(attachment), m_throwIfNotEqual(throwIfNotEqual), m_mismatchDetected(false)		, m_firstChannel(firstChannel), m_secondChannel(secondChannel) {}	unsigned int ChannelPut2(const std::string &channel, const byte *begin, unsigned int length, int messageEnd, bool blocking);	void ChannelInitialize(const std::string &channel, const NameValuePairs &parameters=g_nullNameValuePairs, int propagation=-1);	bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true);private:	unsigned int MapChannel(const std::string &channel) const;	bool HandleMismatchDetected(bool blocking);	bool m_throwIfNotEqual, m_mismatchDetected;	std::string m_firstChannel, m_secondChannel;	MessageQueue m_q[2];};NAMESPACE_ENDNAMESPACE_BEGIN(std)template<> inline void swap(CryptoPP::MessageQueue &a, CryptoPP::MessageQueue &b){	a.swap(b);}NAMESPACE_END#endif