include/internal/catch_random_number_generator.cpp


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

/*
 *  Created by Martin on 30/08/2017.
 *
 *  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)
 */

#include "catch_random_number_generator.h"
#include "catch_context.h"
#include "catch_interfaces_config.h"

namespace Catch {

    std::mt19937& rng() {
        static std::mt19937 s_rng;
        return s_rng;
    }

    void seedRng( IConfig const& config ) {
        if( config.rngSeed() != 0 ) {
            std::srand( config.rngSeed() );
            rng().seed( config.rngSeed() );
        }
    }

    unsigned int rngSeed() {
        return getCurrentContext().getConfig()->rngSeed();
    }
}