InstallArea/include/MdcRecoUtil/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