00001 #ifndef CRYPTOPP_MQUEUE_H
00002 #define CRYPTOPP_MQUEUE_H
00003
00004 #include "queue.h"
00005 #include "filters.h"
00006 #include <deque>
00007
00008 NAMESPACE_BEGIN(CryptoPP)
00009
00010
00011 class CRYPTOPP_DLL MessageQueue : public AutoSignaling<BufferedTransformation>
00012 {
00013 public:
00014 MessageQueue(unsigned int nodeSize=256);
00015
00016 void IsolatedInitialize(const NameValuePairs ¶meters)
00017 {m_queue.IsolatedInitialize(parameters); m_lengths.assign(1, 0U); m_messageCounts.assign(1, 0U);}
00018 unsigned int Put2(const byte *begin, unsigned int length, int messageEnd, bool blocking)
00019 {
00020 m_queue.Put(begin, length);
00021 m_lengths.back() += length;
00022 if (messageEnd)
00023 {
00024 m_lengths.push_back(0);
00025 m_messageCounts.back()++;
00026 }
00027 return 0;
00028 }
00029 bool IsolatedFlush(bool hardFlush, bool blocking) {return false;}
00030 bool IsolatedMessageSeriesEnd(bool blocking)
00031 {m_messageCounts.push_back(0); return false;}
00032
00033 unsigned long MaxRetrievable() const
00034 {return m_lengths.front();}
00035 bool AnyRetrievable() const
00036 {return m_lengths.front() > 0;}
00037
00038 unsigned int TransferTo2(BufferedTransformation &target, unsigned long &transferBytes, const std::string &channel=NULL_CHANNEL, bool blocking=true);
00039 unsigned int CopyRangeTo2(BufferedTransformation &target, unsigned long &begin, unsigned long end=ULONG_MAX, const std::string &channel=NULL_CHANNEL, bool blocking=true) const;
00040
00041 unsigned long TotalBytesRetrievable() const
00042 {return m_queue.MaxRetrievable();}
00043 unsigned int NumberOfMessages() const
00044 {return m_lengths.size()-1;}
00045 bool GetNextMessage();
00046
00047 unsigned int NumberOfMessagesInThisSeries() const
00048 {return m_messageCounts[0];}
00049 unsigned int NumberOfMessageSeries() const
00050 {return m_messageCounts.size()-1;}
00051
00052 unsigned int CopyMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=NULL_CHANNEL) const;
00053
00054 const byte * Spy(unsigned int &contiguousSize) const;
00055
00056 void swap(MessageQueue &rhs);
00057
00058 private:
00059 ByteQueue m_queue;
00060 std::deque<unsigned long> m_lengths, m_messageCounts;
00061 };
00062
00063
00064
00065 class CRYPTOPP_DLL EqualityComparisonFilter : public Unflushable<Multichannel<Filter> >
00066 {
00067 public:
00068 struct MismatchDetected : public Exception {MismatchDetected() : Exception(DATA_INTEGRITY_CHECK_FAILED, "EqualityComparisonFilter: did not receive the same data on two channels") {}};
00069
00070
00071 EqualityComparisonFilter(BufferedTransformation *attachment=NULL, bool throwIfNotEqual=true, const std::string &firstChannel="0", const std::string &secondChannel="1")
00072 : m_throwIfNotEqual(throwIfNotEqual), m_mismatchDetected(false)
00073 , m_firstChannel(firstChannel), m_secondChannel(secondChannel)
00074 {Detach(attachment);}
00075
00076 unsigned int ChannelPut2(const std::string &channel, const byte *begin, unsigned int length, int messageEnd, bool blocking);
00077 bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true);
00078
00079 private:
00080 unsigned int MapChannel(const std::string &channel) const;
00081 bool HandleMismatchDetected(bool blocking);
00082
00083 bool m_throwIfNotEqual, m_mismatchDetected;
00084 std::string m_firstChannel, m_secondChannel;
00085 MessageQueue m_q[2];
00086 };
00087
00088 NAMESPACE_END
00089
00090 NAMESPACE_BEGIN(std)
00091 template<> inline void swap(CryptoPP::MessageQueue &a, CryptoPP::MessageQueue &b)
00092 {
00093 a.swap(b);
00094 }
00095 NAMESPACE_END
00096
00097 #endif