Blame view

Socket/cryptopp/channels.cpp 7.24 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
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