njn_uniform.hpp

#ifndef INCLUDED_NJN_UNIFORM
#define INCLUDED_NJN_UNIFORM

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/*****************************************************************************

File name: njn_uniform.hpp

Author: John Spouge

Contents: 

******************************************************************************/



#include "njn_random.hpp"

#include <assert.h>


namespace Njn {

   namespace Uniform { // uniform distribution 

      template <typename T>
      inline T variate (T a_ = static_cast <T> (0.0), T b_= static_cast <T> (1.0)); // returns uniform random variate [a_, b_) 

      template <typename T>
      inline T standardVariate ();

//
// There are no more declarations beyond this point.
//
      template <typename T>
      T variate (T a_, T b_)
      {
         assert (a_ != b_);

         //if (b_ < a_) std::swap <T> (a_, b_); // a_ < b_
		 if (b_ < a_) std::swap (a_, b_); // a_ < b_/*sls deleted <T>*/

         long random = 0;
         while ((random = Njn::Random::number ()) == 0x7fffffff);

         return a_ + static_cast <T> ((b_ - a_) * static_cast <double> (Random::number ()) / static_cast <double> (0x7fffffff)); 
      }
   }
}

#endif //! INCLUDED