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-rw-r--r--CryptoPP/channels.cpp309
1 files changed, 309 insertions, 0 deletions
diff --git a/CryptoPP/channels.cpp b/CryptoPP/channels.cpp
new file mode 100644
index 000000000..7359f54f7
--- /dev/null
+++ b/CryptoPP/channels.cpp
@@ -0,0 +1,309 @@
+// channels.cpp - written and placed in the public domain by Wei Dai
+
+#include "pch.h"
+
+#ifndef CRYPTOPP_IMPORTS
+
+#include "channels.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+USING_NAMESPACE(std)
+
+#if 0
+void MessageSwitch::AddDefaultRoute(BufferedTransformation &destination, const std::string &channel)
+{
+ m_defaultRoutes.push_back(Route(&destination, channel));
+}
+
+void MessageSwitch::AddRoute(unsigned int begin, unsigned int end, BufferedTransformation &destination, const std::string &channel)
+{
+ RangeRoute route(begin, end, Route(&destination, channel));
+ RouteList::iterator it = upper_bound(m_routes.begin(), m_routes.end(), route);
+ m_routes.insert(it, route);
+}
+
+/*
+class MessageRouteIterator
+{
+public:
+ typedef MessageSwitch::RouteList::const_iterator RouteIterator;
+ typedef MessageSwitch::DefaultRouteList::const_iterator DefaultIterator;
+
+ bool m_useDefault;
+ RouteIterator m_itRouteCurrent, m_itRouteEnd;
+ DefaultIterator m_itDefaultCurrent, m_itDefaultEnd;
+
+ MessageRouteIterator(MessageSwitch &ms, const std::string &channel)
+ : m_channel(channel)
+ {
+ pair<MapIterator, MapIterator> range = cs.m_routeMap.equal_range(channel);
+ if (range.first == range.second)
+ {
+ m_useDefault = true;
+ m_itListCurrent = cs.m_defaultRoutes.begin();
+ m_itListEnd = cs.m_defaultRoutes.end();
+ }
+ else
+ {
+ m_useDefault = false;
+ m_itMapCurrent = range.first;
+ m_itMapEnd = range.second;
+ }
+ }
+
+ bool End() const
+ {
+ return m_useDefault ? m_itListCurrent == m_itListEnd : m_itMapCurrent == m_itMapEnd;
+ }
+
+ void Next()
+ {
+ if (m_useDefault)
+ ++m_itListCurrent;
+ else
+ ++m_itMapCurrent;
+ }
+
+ BufferedTransformation & Destination()
+ {
+ return m_useDefault ? *m_itListCurrent->first : *m_itMapCurrent->second.first;
+ }
+
+ const std::string & Message()
+ {
+ if (m_useDefault)
+ return m_itListCurrent->second.get() ? *m_itListCurrent->second.get() : m_channel;
+ else
+ return m_itMapCurrent->second.second;
+ }
+};
+
+void MessageSwitch::Put(byte inByte);
+void MessageSwitch::Put(const byte *inString, unsigned int length);
+
+void MessageSwitch::Flush(bool completeFlush, int propagation=-1);
+void MessageSwitch::MessageEnd(int propagation=-1);
+void MessageSwitch::PutMessageEnd(const byte *inString, unsigned int length, int propagation=-1);
+void MessageSwitch::MessageSeriesEnd(int propagation=-1);
+*/
+#endif
+
+
+//
+// ChannelRouteIterator
+//////////////////////////
+
+void ChannelRouteIterator::Reset(const std::string &channel)
+{
+ m_channel = channel;
+ pair<MapIterator, MapIterator> range = m_cs.m_routeMap.equal_range(channel);
+ if (range.first == range.second)
+ {
+ m_useDefault = true;
+ m_itListCurrent = m_cs.m_defaultRoutes.begin();
+ m_itListEnd = m_cs.m_defaultRoutes.end();
+ }
+ else
+ {
+ m_useDefault = false;
+ m_itMapCurrent = range.first;
+ m_itMapEnd = range.second;
+ }
+}
+
+bool ChannelRouteIterator::End() const
+{
+ return m_useDefault ? m_itListCurrent == m_itListEnd : m_itMapCurrent == m_itMapEnd;
+}
+
+void ChannelRouteIterator::Next()
+{
+ if (m_useDefault)
+ ++m_itListCurrent;
+ else
+ ++m_itMapCurrent;
+}
+
+BufferedTransformation & ChannelRouteIterator::Destination()
+{
+ return m_useDefault ? *m_itListCurrent->first : *m_itMapCurrent->second.first;
+}
+
+const std::string & ChannelRouteIterator::Channel()
+{
+ if (m_useDefault)
+ return m_itListCurrent->second.get() ? *m_itListCurrent->second.get() : m_channel;
+ else
+ return m_itMapCurrent->second.second;
+}
+
+
+//
+// ChannelSwitch
+///////////////////
+
+size_t ChannelSwitch::ChannelPut2(const std::string &channel, const byte *begin, size_t length, int messageEnd, bool blocking)
+{
+ if (m_blocked)
+ {
+ m_blocked = false;
+ goto WasBlocked;
+ }
+
+ m_it.Reset(channel);
+
+ while (!m_it.End())
+ {
+WasBlocked:
+ if (m_it.Destination().ChannelPut2(m_it.Channel(), begin, length, messageEnd, blocking))
+ {
+ m_blocked = true;
+ return 1;
+ }
+
+ m_it.Next();
+ }
+
+ return 0;
+}
+
+void ChannelSwitch::IsolatedInitialize(const NameValuePairs &parameters/* =g_nullNameValuePairs */)
+{
+ m_routeMap.clear();
+ m_defaultRoutes.clear();
+ m_blocked = false;
+}
+
+bool ChannelSwitch::ChannelFlush(const std::string &channel, bool completeFlush, int propagation, bool blocking)
+{
+ if (m_blocked)
+ {
+ m_blocked = false;
+ goto WasBlocked;
+ }
+
+ m_it.Reset(channel);
+
+ while (!m_it.End())
+ {
+ WasBlocked:
+ if (m_it.Destination().ChannelFlush(m_it.Channel(), completeFlush, propagation, blocking))
+ {
+ m_blocked = true;
+ return true;
+ }
+
+ m_it.Next();
+ }
+
+ return false;
+}
+
+bool ChannelSwitch::ChannelMessageSeriesEnd(const std::string &channel, int propagation, bool blocking)
+{
+ if (m_blocked)
+ {
+ m_blocked = false;
+ goto WasBlocked;
+ }
+
+ m_it.Reset(channel);
+
+ while (!m_it.End())
+ {
+ WasBlocked:
+ if (m_it.Destination().ChannelMessageSeriesEnd(m_it.Channel(), propagation))
+ {
+ m_blocked = true;
+ return true;
+ }
+
+ m_it.Next();
+ }
+
+ return false;
+}
+
+byte * ChannelSwitch::ChannelCreatePutSpace(const std::string &channel, size_t &size)
+{
+ m_it.Reset(channel);
+ if (!m_it.End())
+ {
+ BufferedTransformation &target = m_it.Destination();
+ const std::string &channel = m_it.Channel();
+ m_it.Next();
+ if (m_it.End()) // there is only one target channel
+ return target.ChannelCreatePutSpace(channel, size);
+ }
+ size = 0;
+ return NULL;
+}
+
+size_t ChannelSwitch::ChannelPutModifiable2(const std::string &channel, byte *inString, size_t length, int messageEnd, bool blocking)
+{
+ ChannelRouteIterator it(*this);
+ it.Reset(channel);
+
+ if (!it.End())
+ {
+ BufferedTransformation &target = it.Destination();
+ const std::string &targetChannel = it.Channel();
+ it.Next();
+ if (it.End()) // there is only one target channel
+ return target.ChannelPutModifiable2(targetChannel, inString, length, messageEnd, blocking);
+ }
+
+ return ChannelPut2(channel, inString, length, messageEnd, blocking);
+}
+
+void ChannelSwitch::AddDefaultRoute(BufferedTransformation &destination)
+{
+ m_defaultRoutes.push_back(DefaultRoute(&destination, value_ptr<std::string>(NULL)));
+}
+
+void ChannelSwitch::RemoveDefaultRoute(BufferedTransformation &destination)
+{
+ for (DefaultRouteList::iterator it = m_defaultRoutes.begin(); it != m_defaultRoutes.end(); ++it)
+ if (it->first == &destination && !it->second.get())
+ {
+ m_defaultRoutes.erase(it);
+ break;
+ }
+}
+
+void ChannelSwitch::AddDefaultRoute(BufferedTransformation &destination, const std::string &outChannel)
+{
+ m_defaultRoutes.push_back(DefaultRoute(&destination, outChannel));
+}
+
+void ChannelSwitch::RemoveDefaultRoute(BufferedTransformation &destination, const std::string &outChannel)
+{
+ for (DefaultRouteList::iterator it = m_defaultRoutes.begin(); it != m_defaultRoutes.end(); ++it)
+ if (it->first == &destination && (it->second.get() && *it->second == outChannel))
+ {
+ m_defaultRoutes.erase(it);
+ break;
+ }
+}
+
+void ChannelSwitch::AddRoute(const std::string &inChannel, BufferedTransformation &destination, const std::string &outChannel)
+{
+ m_routeMap.insert(RouteMap::value_type(inChannel, Route(&destination, outChannel)));
+}
+
+void ChannelSwitch::RemoveRoute(const std::string &inChannel, BufferedTransformation &destination, const std::string &outChannel)
+{
+ typedef ChannelSwitch::RouteMap::iterator MapIterator;
+ pair<MapIterator, MapIterator> range = m_routeMap.equal_range(inChannel);
+
+ for (MapIterator it = range.first; it != range.second; ++it)
+ if (it->second.first == &destination && it->second.second == outChannel)
+ {
+ m_routeMap.erase(it);
+ break;
+ }
+}
+
+NAMESPACE_END
+
+#endif