Go4Fit/TGo4FitModelFunction.cxx

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// $Id: TGo4FitModelFunction.cxx 933 2013-01-29 15:27:58Z linev $
//-----------------------------------------------------------------------
//       The GSI Online Offline Object Oriented (Go4) Project
//         Experiment Data Processing at EE department, GSI
//-----------------------------------------------------------------------
// Copyright (C) 2000- GSI Helmholtzzentrum für Schwerionenforschung GmbH
//                     Planckstr. 1, 64291 Darmstadt, Germany
// Contact:            http://go4.gsi.de
//-----------------------------------------------------------------------
// This software can be used under the license agreements as stated
// in Go4License.txt file which is part of the distribution.
//-----------------------------------------------------------------------

#include "TGo4FitModelFunction.h"

#include "Riostream.h"

#ifndef _WINDOWS
#include <dlfcn.h>
#endif

#include "TString.h"

#include "TGo4FitParameter.h"

TGo4FitModelFunction::TGo4FitModelFunction() : TGo4FitModel(), fxLibraryName(), fxFunctionName(), fxUserFunction(0), fxLibrary(0)
{
}

TGo4FitModelFunction::TGo4FitModelFunction(const char* iName, TUserFunction iUserFunction, Int_t iNPars, Bool_t AddAmplitude) :
   TGo4FitModel(iName,"Model, using user function",AddAmplitude),
   fxLibraryName(), fxFunctionName(), fxPosIndex(), fxWidthIndex(),
   fxUserFunction(iUserFunction), fxLibrary(0)
{
   for (Int_t n=0;n<iNPars;n++)
       NewParameter(GetFuncParName(n),"user parameter",0.);
}

TGo4FitModelFunction::TGo4FitModelFunction(const char* iName, const char* iLibraryName, const char* iFunctionName, Int_t iNPars, Bool_t AddAmplitude) :
   TGo4FitModel(iName,"Model, using user function",AddAmplitude),
   fxLibraryName(iLibraryName), fxFunctionName(iFunctionName), fxPosIndex(), fxWidthIndex(),
   fxUserFunction(0), fxLibrary(0)
{
   for (Int_t n=0;n<iNPars;n++)
       NewParameter(GetFuncParName(n),"user parameter",0.);
}

TGo4FitModelFunction::~TGo4FitModelFunction()
{
   CloseLibrary();
}

void TGo4FitModelFunction::SetUserFunction(TUserFunction iUserFunction)
{
   CloseLibrary();
   fxLibraryName = "";
   fxFunctionName = "";
   fxUserFunction = iUserFunction;
}

void TGo4FitModelFunction::SetUserFunction(const char* iLibraryName, const char* iFunctionName)
{
   CloseLibrary();
   fxLibraryName = iLibraryName;
   fxFunctionName = iFunctionName;
   fxUserFunction = 0;
}

Int_t TGo4FitModelFunction::GetNumberOfFuncPar()
{
   Int_t num = TGo4FitParsList::NumPars();
   if (GetAmplPar()) num--;
   return num;
}

TGo4FitParameter* TGo4FitModelFunction::GetFuncPar(Int_t n)
{
   if ((n<0) || (n>=GetNumberOfFuncPar())) return 0;
   if ((GetAmplIndex()>=0) && (n>=GetAmplIndex())) n++;
   return GetPar(n);
}

Bool_t TGo4FitModelFunction::SetNumberOfFuncPar(Int_t num)
{
   Int_t oldnum = GetNumberOfFuncPar();
   if ((num<0) || (oldnum==num)) return kFALSE;
   if(num<oldnum) {
      for(Int_t n=oldnum-1;n>=num;n--)
        RemovePar(GetFuncPar(n)->GetName());
   } else {
      for(Int_t n=oldnum;n<num;n++)
        NewParameter(GetFuncParName(n),"user parameter",0.);
   }

   return kTRUE;
}

void TGo4FitModelFunction::SetPosParIndex(Int_t naxis, Int_t indx)
{
  if (naxis<0) return;
  Int_t oldsize = fxPosIndex.GetSize();
  if (naxis>=oldsize) {
    fxPosIndex.Set(naxis+1);
    for (Int_t n=oldsize;n<fxPosIndex.GetSize();n++) fxPosIndex[n] = -1;
  }
  fxPosIndex[naxis] = indx;
}

void TGo4FitModelFunction::SetWidthParIndex(Int_t naxis, Int_t indx)
{
  if (naxis<0) return;
  Int_t oldsize = fxWidthIndex.GetSize();
  if (naxis>=oldsize) {
    fxWidthIndex.Set(naxis+1);
    for (Int_t n=oldsize;n<fxWidthIndex.GetSize();n++) fxWidthIndex[n] = -1;
  }
  fxWidthIndex[naxis] = indx;
}

Int_t TGo4FitModelFunction::GetPosParIndex(Int_t naxis)
{
   if ((naxis<0) || (naxis>=fxPosIndex.GetSize())) return -1;
   return GetParIndex(GetFuncPar(fxPosIndex[naxis]));
}

Int_t TGo4FitModelFunction::GetWidthParIndex(Int_t naxis)
{
   if ((naxis<0) || (naxis>=fxWidthIndex.GetSize())) return -1;
   return GetParIndex(GetFuncPar(fxWidthIndex[naxis]));
}

TString TGo4FitModelFunction::GetFuncParName(Int_t n)
{
   TString res;
   res.Form("Par%d",n);
   return res;
}

Bool_t TGo4FitModelFunction::Initialize(Int_t UseBuffers)
{
   if (!LoadLibrary(kTRUE)) return kFALSE;
   return TGo4FitModel::Initialize(UseBuffers);
}

void TGo4FitModelFunction::Finalize()
{
   CloseLibrary();
   TGo4FitModel::Finalize();
}

Bool_t TGo4FitModelFunction::BeforeEval(Int_t ndim)
{
   if (!TGo4FitModel::BeforeEval(ndim)) return kFALSE;
   return LoadLibrary(kFALSE);
}

void TGo4FitModelFunction::AfterEval()
{
   TGo4FitModel::AfterEval();
}

Double_t TGo4FitModelFunction::UserFunction(Double_t* Coordinates, Double_t* Parameters)
{
   if (fxUserFunction) return (*fxUserFunction)(Coordinates,Parameters);
                  else return 0.;
}

#ifndef _WINDOWS

Bool_t TGo4FitModelFunction::LoadLibrary(Bool_t CloseFirst)
{
   if ((fxLibraryName.Length()==0) || (fxFunctionName.Length()==0)) {
     if (fxUserFunction==0) std::cout << "TGo4FitModelFunction: user function not set" << std::endl;
     return (fxUserFunction!=0);
   }

   if (CloseFirst) CloseLibrary();
   if ((fxLibrary!=0) && (fxUserFunction!=0)) return kTRUE;

   fxLibrary = dlopen(fxLibraryName, RTLD_NOW | RTLD_GLOBAL);
   if (fxLibrary==0) {
      std::cout << " TGo4FitModelFunction: failed to open " << fxLibraryName << ",  " << dlerror() << std::endl;
      return kFALSE;
   }
   fxUserFunction = (TUserFunction) dlsym(fxLibrary, fxFunctionName);
   if(fxUserFunction==0) fxUserFunction = (TUserFunction) dlsym(fxLibrary, fxFunctionName+"__FPdT0");
   if(fxUserFunction==0) fxUserFunction = (TUserFunction) dlsym(fxLibrary, fxFunctionName+"__");
   if(fxUserFunction==0) fxUserFunction = (TUserFunction) dlsym(fxLibrary, fxFunctionName+"_");
   if(fxUserFunction==0) {
       std::cout << " TGo4FitModelFunction: failed to find " << fxFunctionName << ",  " << dlerror() << std::endl;
       CloseLibrary();
       return kFALSE;
   }
   return kTRUE;
}

void TGo4FitModelFunction::CloseLibrary()
{
   if (fxLibrary!=0) {
      dlclose(fxLibrary);
      fxLibrary = 0;
   }
}

#else

Bool_t TGo4FitModelFunction::LoadLibrary(Bool_t CloseFirst)
{
   // here must be win32 LoadLibrary() and GetProcAddress() calls
   // when required, must be implemented

   fxLibrary = 0;
   return kFALSE;
}

void TGo4FitModelFunction::CloseLibrary()
{
   // here must be FreeLibrary() calls
   fxLibrary = 0;
}

#endif

void TGo4FitModelFunction::Print(Option_t* option) const
{
   TGo4FitModel::Print(option);
   if ((fxLibraryName.Length()>0) || (fxFunctionName.Length()>0))
      std::cout << "Function " << fxFunctionName << "  in " << fxLibraryName << std::endl;
   else
      std::cout << " Pointer on function " << fxUserFunction << std::endl;
   for (Int_t naxis=0;naxis<fxPosIndex.GetSize();naxis++) {
     TGo4FitParameter* par = ((TGo4FitModelFunction*) this)->GetFuncPar(fxPosIndex[naxis]);
     if (par)
        std::cout << "  Position on " << naxis << " axis is " << par->GetName() << std::endl;
   }
   for (Int_t naxis=0;naxis<fxWidthIndex.GetSize();naxis++) {
     TGo4FitParameter* par = ((TGo4FitModelFunction*) this)->GetFuncPar(fxWidthIndex[naxis]);
     if (par)
        std::cout << "  Width on " << naxis << " axis is " << par->GetName() << std::endl;
   }
}