Reconstruction/MdcPatRec/MdcRecoUtil/include/MdcRecoUtil/NumRecipes.h

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//--------------------------------------------------------------------------
// File and Version Information:
//  $Id: NumRecipes.h,v 1.2 2009/12/23 02:59:56 zhangy Exp $
//
// Description:
//      A collection of commonly used algorithms from "Numerical Recipes"
//
// Environment:
//  Software developed for the BaBar Detector at the SLAC B-Factory.
//
// Author List:
//      Bob Jacobsen, Ed Iskander
//
// Copyright Information:
//  Copyright (C) 1996
//
// History:
//  Migration for BESIII MDC
//
//------------------------------------------------------------------------
 
#ifndef NUMRECIPES_H
#define NUMRECIPES_H
 
#define NUMREC_ITMAX 100
#define NUMREC_EPS 3.0e-7
 
//-----------------
//-----------------
class NumRecipes {
public:
  // log of gamma function
  static double gammln( double x );
 
  static double gammq( double a, double x );
 
  static double gammp( double a, double x );
 
  static void gcf( double* gammcf, double a, double x, double* gln );
 
  static void gser( double* gamser, double a, double x, double* gln );
 
private:
  static void recipesErr( const char* c );
};
 
#endif