Crypto++ 7.0 Free C++ class library of cryptographic schemes

mqueue.h
1 #ifndef CRYPTOPP_MQUEUE_H
2 #define CRYPTOPP_MQUEUE_H
3
4 #include "cryptlib.h"
5 #include "queue.h"
6 #include "filters.h"
7 #include "misc.h"
8
9 #include <deque>
10
11 NAMESPACE_BEGIN(CryptoPP)
12
13 /// Message Queue
14 class CRYPTOPP_DLL MessageQueue : public AutoSignaling<BufferedTransformation>
15 {
16 public:
17 MessageQueue(unsigned int nodeSize=256);
18
19 void IsolatedInitialize(const NameValuePairs &parameters)
20 {m_queue.IsolatedInitialize(parameters); m_lengths.assign(1, 0U); m_messageCounts.assign(1, 0U);}
21 size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
22 {
23 CRYPTOPP_UNUSED(blocking);
24 m_queue.Put(begin, length);
25 m_lengths.back() += length;
26 if (messageEnd)
27 {
28 m_lengths.push_back(0);
29 m_messageCounts.back()++;
30 }
31 return 0;
32 }
33 bool IsolatedFlush(bool hardFlush, bool blocking)
34 {CRYPTOPP_UNUSED(hardFlush), CRYPTOPP_UNUSED(blocking); return false;}
35 bool IsolatedMessageSeriesEnd(bool blocking)
36 {CRYPTOPP_UNUSED(blocking); m_messageCounts.push_back(0); return false;}
37
38 lword MaxRetrievable() const
39 {return m_lengths.front();}
40 bool AnyRetrievable() const
41 {return m_lengths.front() > 0;}
42
43 size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
44 size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const;
45
46 lword TotalBytesRetrievable() const
47 {return m_queue.MaxRetrievable();}
48 unsigned int NumberOfMessages() const
49 {return (unsigned int)m_lengths.size()-1;}
50 bool GetNextMessage();
51
52 unsigned int NumberOfMessagesInThisSeries() const
53 {return m_messageCounts[0];}
54 unsigned int NumberOfMessageSeries() const
55 {return (unsigned int)m_messageCounts.size()-1;}
56
57 unsigned int CopyMessagesTo(BufferedTransformation &target, unsigned int count=UINT_MAX, const std::string &channel=DEFAULT_CHANNEL) const;
58
59 const byte * Spy(size_t &contiguousSize) const;
60
61 void swap(MessageQueue &rhs);
62
63 private:
64 ByteQueue m_queue;
65 std::deque<lword> m_lengths;
66 std::deque<unsigned int> m_messageCounts;
67 };
68
69
70 /// A filter that checks messages on two channels for equality
71 class CRYPTOPP_DLL EqualityComparisonFilter : public Unflushable<Multichannel<Filter> >
72 {
73 public:
74 struct MismatchDetected : public Exception {MismatchDetected() : Exception(DATA_INTEGRITY_CHECK_FAILED, "EqualityComparisonFilter: did not receive the same data on two channels") {}};
75
76 /*! if throwIfNotEqual is false, this filter will output a '\\0' byte when it detects a mismatch, '\\1' otherwise */
77 EqualityComparisonFilter(BufferedTransformation *attachment=NULLPTR, bool throwIfNotEqual=true, const std::string &firstChannel="0", const std::string &secondChannel="1")
78 : m_throwIfNotEqual(throwIfNotEqual), m_mismatchDetected(false)
79 , m_firstChannel(firstChannel), m_secondChannel(secondChannel)
80 {Detach(attachment);}
81
82 size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking);
83 bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true);
84
85 private:
86 unsigned int MapChannel(const std::string &channel) const;
87 bool HandleMismatchDetected(bool blocking);
88
89 bool m_throwIfNotEqual, m_mismatchDetected;
90 std::string m_firstChannel, m_secondChannel;
91 MessageQueue m_q[2];
92 };
93
94 NAMESPACE_END
95
96 #ifndef __BORLANDC__
97 NAMESPACE_BEGIN(std)
98 template<> inline void swap(CryptoPP::MessageQueue &a, CryptoPP::MessageQueue &b)
99 {
100 a.swap(b);
101 }
102 NAMESPACE_END
103 #endif
104
105 #endif
Exception
Base class for all exceptions thrown by the library.
Definition: cryptlib.h:158
MessageQueue::AnyRetrievable
bool AnyRetrievable() const
Determines whether bytes are ready for retrieval.
Definition: mqueue.h:40
misc.h
Utility functions for the Crypto++ library.
MessageQueue::Put2
size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking)
Input multiple bytes for processing.
Definition: mqueue.h:21
MessageQueue
Message Queue.
Definition: mqueue.h:14
cryptlib.h
Abstract base classes that provide a uniform interface to this library.
MessageQueue::IsolatedFlush
bool IsolatedFlush(bool hardFlush, bool blocking)
Flushes data buffered by this object, without signal propagation.
Definition: mqueue.h:33
std
STL namespace.
MessageQueue::IsolatedMessageSeriesEnd
bool IsolatedMessageSeriesEnd(bool blocking)
Marks the end of a series of messages, without signal propagation.
Definition: mqueue.h:35
BufferedTransformation
Interface for buffered transformations.
Definition: cryptlib.h:1564
MessageQueue::NumberOfMessageSeries
unsigned int NumberOfMessageSeries() const
Provides the number of messages in a series.
Definition: mqueue.h:54
EqualityComparisonFilter::EqualityComparisonFilter
EqualityComparisonFilter(BufferedTransformation *attachment=NULL, bool throwIfNotEqual=true, const std::string &firstChannel="0", const std::string &secondChannel="1")
Definition: mqueue.h:77
MessageQueue::NumberOfMessagesInThisSeries
unsigned int NumberOfMessagesInThisSeries() const
Provides the number of messages in a series.
Definition: mqueue.h:52
queue.h
Classes for an unlimited queue to store bytes.
DEFAULT_CHANNEL
const std::string DEFAULT_CHANNEL
Default channel for BufferedTransformation.
Definition: cryptlib.h:482
MessageQueue::NumberOfMessages
unsigned int NumberOfMessages() const
Provides the number of meesages processed by this object.
Definition: mqueue.h:48
ByteQueue
Data structure used to store byte strings.
Definition: queue.h:18
filters.h
Implementation of BufferedTransformation&#39;s attachment interface.
Unflushable
Base class for unflushable filters.
Definition: simple.h:108
AutoSignaling
Provides auto signaling support.
Definition: simple.h:289
MessageQueue::MaxRetrievable
lword MaxRetrievable() const
Provides the number of bytes ready for retrieval.
Definition: mqueue.h:38
EqualityComparisonFilter::MismatchDetected
Definition: mqueue.h:74
EqualityComparisonFilter
A filter that checks messages on two channels for equality.
Definition: mqueue.h:71
CryptoPP
Crypto++ library namespace.
MessageQueue::TotalBytesRetrievable
lword TotalBytesRetrievable() const
Provides the number of bytes ready for retrieval.
Definition: mqueue.h:46
MessageQueue::IsolatedInitialize
void IsolatedInitialize(const NameValuePairs &parameters)
Initialize or reinitialize this object, without signal propagation.
Definition: mqueue.h:19
NameValuePairs
Interface for retrieving values given their names.
Definition: cryptlib.h:293