mirror of
https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
dbb25bdb62
Include cleanup Reworked buildsystem (Linux only) Removed dynamic libs, Linux now again uses static linking (like windows)
53 lines
1 KiB
C++
53 lines
1 KiB
C++
/** @file
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*
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* @par History
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* - 2008/07/08 Turley: Added Random Number Generator "lagged Fibonacci generator"
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* - 2014/08/01 Kimungu: usage of c++11 random lib (mersenne twister)
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*/
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#include <chrono>
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#include <random>
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#include "random.h"
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namespace Pol
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{
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namespace Clib
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{
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namespace
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{
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static std::mt19937 generator(
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static_cast<unsigned>( std::chrono::system_clock::now().time_since_epoch().count() ) );
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}
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// returns [0,f]
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double random_double( double f )
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{
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if ( f <= 0 )
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return 0;
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std::uniform_real_distribution<double> distribution( 0, f );
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return distribution( generator );
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}
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// returns [0,i]
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int random_int( int i )
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{
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if ( i == 0 )
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return i;
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std::uniform_int_distribution<int> distribution( 0, i );
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return distribution( generator );
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}
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// returns [minI,maxI]
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int random_int_range( int minI, int maxI )
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{
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if ( maxI < minI )
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std::swap( maxI, minI );
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if ( minI == maxI )
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return minI;
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std::uniform_int_distribution<int> distribution( minI, maxI );
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return distribution( generator );
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}
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}
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}
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