diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/random.h | 7 | ||||
| -rw-r--r-- | src/test/random_tests.cpp | 22 |
2 files changed, 29 insertions, 0 deletions
diff --git a/src/random.h b/src/random.h index ea88670a37..632ab05883 100644 --- a/src/random.h +++ b/src/random.h @@ -11,6 +11,7 @@ #include <uint256.h> #include <stdint.h> +#include <limits> /* Seed OpenSSL PRNG with additional entropy data */ void RandAddSeed(); @@ -121,6 +122,12 @@ public: /** Generate a random boolean. */ bool randbool() { return randbits(1); } + + // Compatibility with the C++11 UniformRandomBitGenerator concept + typedef uint64_t result_type; + static constexpr uint64_t min() { return 0; } + static constexpr uint64_t max() { return std::numeric_limits<uint64_t>::max(); } + inline uint64_t operator()() { return rand64(); } }; /* Number of random bytes returned by GetOSRand. diff --git a/src/test/random_tests.cpp b/src/test/random_tests.cpp index 1ca5a53d72..623ed239f0 100644 --- a/src/test/random_tests.cpp +++ b/src/test/random_tests.cpp @@ -8,6 +8,9 @@ #include <boost/test/unit_test.hpp> +#include <random> +#include <algorithm> + BOOST_FIXTURE_TEST_SUITE(random_tests, BasicTestingSetup) BOOST_AUTO_TEST_CASE(osrandom_tests) @@ -57,4 +60,23 @@ BOOST_AUTO_TEST_CASE(fastrandom_randbits) } } +/** Does-it-compile test for compatibility with standard C++11 RNG interface. */ +BOOST_AUTO_TEST_CASE(stdrandom_test) +{ + FastRandomContext ctx; + std::uniform_int_distribution<int> distribution(3, 9); + for (int i = 0; i < 100; ++i) { + int x = distribution(ctx); + BOOST_CHECK(x >= 3); + BOOST_CHECK(x <= 9); + + std::vector<int> test{1,2,3,4,5,6,7,8,9,10}; + std::shuffle(test.begin(), test.end(), ctx); + for (int j = 1; j <= 10; ++j) { + BOOST_CHECK(std::find(test.begin(), test.end(), j) != test.end()); + } + } + +} + BOOST_AUTO_TEST_SUITE_END() |