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-rw-r--r--3rdParty/Boost/src/boost/uuid/random_generator.hpp118
1 files changed, 118 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/uuid/random_generator.hpp b/3rdParty/Boost/src/boost/uuid/random_generator.hpp
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+++ b/3rdParty/Boost/src/boost/uuid/random_generator.hpp
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+// Boost random_generator.hpp header file ----------------------------------------------//
+
+// Copyright 2010 Andy Tompkins.
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_UUID_RANDOM_GENERATOR_HPP
+#define BOOST_UUID_RANDOM_GENERATOR_HPP
+
+#include <boost/uuid/uuid.hpp>
+#include <boost/uuid/seed_rng.hpp>
+#include <boost/random/uniform_int.hpp>
+#include <boost/random/variate_generator.hpp>
+#include <boost/random/mersenne_twister.hpp>
+#include <boost/assert.hpp>
+#include <boost/shared_ptr.hpp>
+#include <limits>
+
+namespace boost {
+namespace uuids {
+
+// generate a random-based uuid
+template <typename UniformRandomNumberGenerator>
+class basic_random_generator {
+private:
+ typedef uniform_int<unsigned long> distribution_type;
+ typedef variate_generator<UniformRandomNumberGenerator*, distribution_type> generator_type;
+
+ struct null_deleter
+ {
+ void operator()(void const *) const {}
+ };
+
+public:
+ typedef uuid result_type;
+
+ // default constructor creates the random number generator
+ basic_random_generator()
+ : pURNG(new UniformRandomNumberGenerator)
+ , generator
+ ( pURNG.get()
+ , distribution_type
+ ( (std::numeric_limits<unsigned long>::min)()
+ , (std::numeric_limits<unsigned long>::max)()
+ )
+ )
+ {
+ // seed the random number generator
+ detail::seed(*pURNG);
+ }
+
+ // keep a reference to a random number generator
+ // don't seed a given random number generator
+ explicit basic_random_generator(UniformRandomNumberGenerator& gen)
+ : pURNG(&gen, null_deleter())
+ , generator
+ ( pURNG.get()
+ , distribution_type
+ ( (std::numeric_limits<unsigned long>::min)()
+ , (std::numeric_limits<unsigned long>::max)()
+ )
+ )
+ {}
+
+ // keep a pointer to a random number generator
+ // don't seed a given random number generator
+ explicit basic_random_generator(UniformRandomNumberGenerator* pGen)
+ : pURNG(pGen, null_deleter())
+ , generator
+ ( pURNG.get()
+ , distribution_type
+ ( (std::numeric_limits<unsigned long>::min)()
+ , (std::numeric_limits<unsigned long>::max)()
+ )
+ )
+ {
+ BOOST_ASSERT(pURNG);
+ }
+
+ uuid operator()()
+ {
+ uuid u;
+
+ int i=0;
+ unsigned long random_value = generator();
+ for (uuid::iterator it=u.begin(); it!=u.end(); ++it, ++i) {
+ if (i==sizeof(unsigned long)) {
+ random_value = generator();
+ i = 0;
+ }
+
+ *it = ((random_value >> (i*8)) & 0xFF);
+ }
+
+ // set variant
+ // must be 0b10xxxxxx
+ *(u.begin()+8) &= 0xBF;
+ *(u.begin()+8) |= 0x80;
+
+ // set version
+ // must be 0b0100xxxx
+ *(u.begin()+6) &= 0x4F; //0b01001111
+ *(u.begin()+6) |= 0x40; //0b01000000
+
+ return u;
+ }
+
+private:
+ shared_ptr<UniformRandomNumberGenerator> pURNG;
+ generator_type generator;
+};
+
+typedef basic_random_generator<mt19937> random_generator;
+
+}} // namespace boost::uuids
+
+#endif //BOOST_UUID_RANDOM_GENERATOR_HPP