generators.h

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#ifndef _H_GENERATORS
#define _H_GENERATORS

#include <cstdlib>
#include <cmath>

#define DEFAULT_SEED 1234567891

namespace generators {

        class RNG {

        protected:

                unsigned int _seed;

        public:

                RNG();

                virtual unsigned int nextInt() = 0;

                virtual double nextDouble();

                virtual void setSeed( unsigned int seed );

                virtual unsigned int getMaximum();

                virtual ~RNG() {}
        };

        class RVG {

        private:
                RVG() {}

        protected:
                unsigned int _dim;

        public:
                RVG( unsigned int dim );

                virtual ~RVG() {}

                virtual void nextVector( double *x ) = 0;

                virtual void setSeed( unsigned int seed ) = 0;
        };

        template< typename RNG_TYPE >
        class RVG_RNG: public generators::RVG {

        protected:
                RNG_TYPE generator;

        public:
                RVG_RNG( unsigned int dim ): RVG( dim ) {}

                virtual ~RVG_RNG() {}

                virtual void nextVector( double *x ) {
                        for ( unsigned int i=0; i < _dim; i++ )
                                x[i] = generator.nextDouble();
                }

                virtual void setSeed( unsigned int seed ) {
                        generator.setSeed( seed );
                }
        };

};

#endif

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