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143 lines
4.5 KiB
143 lines
4.5 KiB
![]()
4 years ago
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// channels.h - originally written and placed in the public domain by Wei Dai
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/// \file channels.h
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/// \brief Classes for multiple named channels
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#ifndef CRYPTOPP_CHANNELS_H
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#define CRYPTOPP_CHANNELS_H
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#include "cryptlib.h"
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#include "simple.h"
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#include "smartptr.h"
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#include "stdcpp.h"
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#if CRYPTOPP_MSC_VERSION
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# pragma warning(push)
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# pragma warning(disable: 4355)
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#endif
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NAMESPACE_BEGIN(CryptoPP)
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#if 0
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/// Route input on default channel to different and/or multiple channels based on message sequence number
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class MessageSwitch : public Sink
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{
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public:
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void AddDefaultRoute(BufferedTransformation &destination, const std::string &channel);
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void AddRoute(unsigned int begin, unsigned int end, BufferedTransformation &destination, const std::string &channel);
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void Put(byte inByte);
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void Put(const byte *inString, unsigned int length);
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void Flush(bool completeFlush, int propagation=-1);
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void MessageEnd(int propagation=-1);
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void PutMessageEnd(const byte *inString, unsigned int length, int propagation=-1);
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void MessageSeriesEnd(int propagation=-1);
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private:
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typedef std::pair<BufferedTransformation *, std::string> Route;
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struct RangeRoute
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{
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RangeRoute(unsigned int begin, unsigned int end, const Route &route)
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: begin(begin), end(end), route(route) {}
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bool operator<(const RangeRoute &rhs) const {return begin < rhs.begin;}
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unsigned int begin, end;
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Route route;
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};
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typedef std::list<RangeRoute> RouteList;
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typedef std::list<Route> DefaultRouteList;
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RouteList m_routes;
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DefaultRouteList m_defaultRoutes;
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unsigned int m_nCurrentMessage;
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};
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#endif
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class ChannelSwitchTypedefs
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{
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public:
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typedef std::pair<BufferedTransformation *, std::string> Route;
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typedef std::multimap<std::string, Route> RouteMap;
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typedef std::pair<BufferedTransformation *, value_ptr<std::string> > DefaultRoute;
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typedef std::list<DefaultRoute> DefaultRouteList;
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// SunCC workaround: can't use const_iterator here
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typedef RouteMap::iterator MapIterator;
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typedef DefaultRouteList::iterator ListIterator;
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};
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class ChannelSwitch;
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class ChannelRouteIterator : public ChannelSwitchTypedefs
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{
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public:
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ChannelRouteIterator(ChannelSwitch &cs) : m_cs(cs), m_useDefault(false) {}
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void Reset(const std::string &channel);
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bool End() const;
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void Next();
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BufferedTransformation & Destination();
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const std::string & Channel();
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ChannelSwitch& m_cs;
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std::string m_channel;
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bool m_useDefault;
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MapIterator m_itMapCurrent, m_itMapEnd;
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ListIterator m_itListCurrent, m_itListEnd;
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protected:
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// Hide this to see if we break something...
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ChannelRouteIterator();
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};
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/// Route input to different and/or multiple channels based on channel ID
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class CRYPTOPP_DLL ChannelSwitch : public Multichannel<Sink>, public ChannelSwitchTypedefs
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{
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public:
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ChannelSwitch() : m_it(*this), m_blocked(false) {}
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ChannelSwitch(BufferedTransformation &destination) : m_it(*this), m_blocked(false)
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{
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AddDefaultRoute(destination);
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}
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ChannelSwitch(BufferedTransformation &destination, const std::string &outChannel) : m_it(*this), m_blocked(false)
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{
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AddDefaultRoute(destination, outChannel);
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}
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void IsolatedInitialize(const NameValuePairs ¶meters=g_nullNameValuePairs);
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size_t ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking);
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size_t ChannelPutModifiable2(const std::string &channel, byte *begin, size_t length, int messageEnd, bool blocking);
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bool ChannelFlush(const std::string &channel, bool completeFlush, int propagation=-1, bool blocking=true);
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bool ChannelMessageSeriesEnd(const std::string &channel, int propagation=-1, bool blocking=true);
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byte * ChannelCreatePutSpace(const std::string &channel, size_t &size);
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void AddDefaultRoute(BufferedTransformation &destination);
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void RemoveDefaultRoute(BufferedTransformation &destination);
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void AddDefaultRoute(BufferedTransformation &destination, const std::string &outChannel);
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void RemoveDefaultRoute(BufferedTransformation &destination, const std::string &outChannel);
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void AddRoute(const std::string &inChannel, BufferedTransformation &destination, const std::string &outChannel);
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void RemoveRoute(const std::string &inChannel, BufferedTransformation &destination, const std::string &outChannel);
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private:
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RouteMap m_routeMap;
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DefaultRouteList m_defaultRoutes;
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ChannelRouteIterator m_it;
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bool m_blocked;
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friend class ChannelRouteIterator;
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};
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NAMESPACE_END
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#if CRYPTOPP_MSC_VERSION
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# pragma warning(pop)
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#endif
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#endif
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