1#ifndef CRYPTOPP_MQUEUE_H 2#define CRYPTOPP_MQUEUE_H 3 4#include "queue.h" 5#include "filters.h" 6#include <deque> 7 8NAMESPACE_BEGIN(CryptoPP) 9 10//! Message Queue 11class CRYPTOPP_DLL MessageQueue : public AutoSignaling<BufferedTransformation> 12{ 13public: 14 MessageQueue(unsigned int nodeSize=256); 15 16 void IsolatedInitialize(const NameValuePairs ¶meters) 17 {m_queue.IsolatedInitialize(parameters); m_lengths.assign(1, 0U); m_messageCounts.assign(1, 0U);} 18 size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking) 19 { 20 m_queue.Put(begin, length); 21 m_lengths.back() += length; 22 if (messageEnd) 23 { 24 m_lengths.push_back(0); 25 m_messageCounts.back()++; 26 } 27 return 0; 28 } 29 bool IsolatedFlush(bool hardFlush, bool blocking) {return false;} 30 bool IsolatedMessageSeriesEnd(bool blocking) 31 {m_messageCounts.push_back(0); return false;} 32 33 lword MaxRetrievable() const 34 {return m_lengths.front();} 35 bool AnyRetrievable() const 36 {return m_lengths.front() > 0;} 37 38 size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true); 39 size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const; 40 41 lword TotalBytesRetrievable() const 42 {return m_queue.MaxRetrievable();} 43 unsigned int NumberOfMessages() const 44 {return (unsigned int)m_lengths.size()-1;} 45 bool GetNextMessage(); 46 47 unsigned int NumberOfMessagesInThisSeries() const 48 {return m_messageCounts[0];} 49 unsigned int NumberOfMessageSeries() const 50 {return (unsigned int)m_messageCounts.size()-1;} 51 52 unsigned int CopyMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const; 53 54 const byte * Spy(size_t &contiguousSize) const; 55 56 void swap(MessageQueue &rhs); 57 58private: 59 ByteQueue m_queue; 60 std::deque<lword> m_lengths; 61 std::deque<unsigned int> m_messageCounts; 62}; 63 64 65//! A filter that checks messages on two channels for equality 66class CRYPTOPP_DLL EqualityComparisonFilter : public Unflushable<Multichannel<Filter> > 67{ 68public: 69 struct MismatchDetected : public Exception {MismatchDetected() : Exception(DATA_INTEGRITY_CHECK_FAILED, "EqualityComparisonFilter: did not receive the same data on two channels") {}}; 70 71 /*! if throwIfNotEqual is false, this filter will output a '\\0' byte when it detects a mismatch, '\\1' otherwise */ 72 EqualityComparisonFilter(BufferedTransformation *attachment=NULL, bool throwIfNotEqual=true, const std::string &firstChannel="0", const std::string &secondChannel="1") 73 : m_throwIfNotEqual(throwIfNotEqual), m_mismatchDetected(false) 74 , m_firstChannel(firstChannel), m_secondChannel(secondChannel) 75 {Detach(attachment);} 76 77 size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking); 78 bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true); 79 80private: 81 unsigned int MapChannel(const std::string &channel) const; 82 bool HandleMismatchDetected(bool blocking); 83 84 bool m_throwIfNotEqual, m_mismatchDetected; 85 std::string m_firstChannel, m_secondChannel; 86 MessageQueue m_q[2]; 87}; 88 89NAMESPACE_END 90 91#ifndef __BORLANDC__ 92NAMESPACE_BEGIN(std) 93template<> inline void swap(CryptoPP::MessageQueue &a, CryptoPP::MessageQueue &b) 94{ 95 a.swap(b); 96} 97NAMESPACE_END 98#endif 99 100#endif 101