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Replaced use of std::rand with std::mt19937

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This uses a global instance of the RNG
This commit is contained in:
Phil Nash 2018-06-15 14:35:47 +01:00
parent 1dce91d78e
commit 35a57b070f
3 changed files with 14 additions and 31 deletions
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24
include/internal/catch_random_number_generator.cpp
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@ -9,23 +9,21 @@
#include "catch_context.h"
#include "catch_interfaces_config.h"
#include <cstdlib>
namespace Catch {
void seedRng( IConfig const& config ) {
if( config.rngSeed() != 0 )
std::srand( config.rngSeed() );
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();
}
RandomNumberGenerator::result_type RandomNumberGenerator::operator()( result_type n ) const {
return std::rand() % n;
}
RandomNumberGenerator::result_type RandomNumberGenerator::operator()() const {
return std::rand() % (max)();
}
}