LHAGlue.h

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// -*- C++ -*-
//
// This file is part of LHAPDF
// Copyright (C) 2012-2022 The LHAPDF collaboration (see AUTHORS for details)
//
#pragma once
#ifndef LHAPDF_LHAGlue_H
#define LHAPDF_LHAGlue_H


#include "LHAPDF/Version.h"
#if LHAPDF_LHA5CXX

std::string lhaglue_get_current_pdf(int nset=1);

// Compatibility preprocessor-based aliasing of deprecated "M" function names
#define initPDFSetM initPDFSet
#define initPDFSetByNameM initPDFSetByName
#define initPDFM initPDF
#define initPDFByNameM initPDFByName
#define getDescriptionM getDescription
#define xfxM xfx
#define xfxpM xfxp
#define xfxaM xfxa
#define xfxphotonM xfxphoton
#define numberPDFM numberPDF
#define alphasPDFM alphasPDF
#define getOrderPDFM getOrderPDF
#define getOrderAlphaSM getOrderAlphaS
#define getQMassM getQMass
#define getThresholdM getThreshold
#define getNfM getNf
#define getLam4M getLam4
#define getLam5M getLam5
#define getXminM getXmin
#define getXmaxM getXmax
#define getQ2minM getQ2min
#define getQ2maxM getQ2max

namespace LHAPDF {


  enum SetType {
    EVOLVE = 0, LHPDF = 0,
    INTERPOLATE = 1, LHGRID = 1
  };

  enum Verbosity { SILENT=0, LOWKEY=1, DEFAULT=2 };

  inline std::string getVersion() {
    return version();
  }

  inline int getMaxNumSets() { return 1000; }

  inline void initLHAPDF() {}

  // This form commented due to unused variable warnings, until this can actually have an effect
  // inline void extrapolate(bool extrapolate=true) {}
  inline void extrapolate(bool) {}
  inline void extrapolate() {}

  void setVerbosity(Verbosity noiselevel);

  inline void setParameter(const std::string&) {
    std::cerr << "LHAPDF::setParameter() has no effect in LHAPDF6: "
              << "please update your code to use the native C++ interface" << std::endl;
  }

  bool hasPhoton();

  void setPDFPath(const string& path);
  std::string pdfsetsPath();


  void initPDFSetByName(const std::string& filename);
  void initPDFSetByName(const std::string& filename, SetType type);

  void initPDFSetByName(int nset, const std::string& filename);
  void initPDFSetByName(int nset, const std::string& filename, SetType type);


  int numberPDF();

  int numberPDF(int nset);

  void initPDF(int memset);

  void initPDF(int nset, int memset);


  double xfx(double x, double Q, int fl);

  double xfx(int nset, double x, double Q, int fl);

  void xfx(double x, double Q, double* results);

  void xfx(int nset, double x, double Q, double* results);

  std::vector<double> xfx(double x, double Q);

  std::vector<double> xfx(int nset, double x, double Q);


  std::vector<double> xfxphoton(double x, double Q);

  std::vector<double> xfxphoton(int nset, double x, double Q);

  void xfxphoton(double x, double Q, double* results);

  void xfxphoton(int nset, double x, double Q, double* results);

  double xfxphoton(double x, double Q, int fl);

  double xfxphoton(int nset, double x, double Q, int fl);


  void getDescription();

  void getDescription(int nset);


  int getOrderAlphaS();

  int getOrderAlphaS(int nset);


  int getOrderPDF();

  int getOrderPDF(int nset);


  int getNf(int nset);

  int getNf();


  double getLam4(int nset);

  double getLam4(int nset, int nmem);


  double getLam5(int nset);

  double getLam5(int nset, int nmem);


  double getXmin(int nmem);

  double getXmin(int nset, int nmem);

  double getXmax(int nset, int nmem);

  double getXmax(int nmem);


  double getQ2min(int nset, int nmem);

  double getQ2min(int nmem);

  double getQ2max(int nset, int nmem);

  double getQ2max(int nmem);


  double getQMass(int nset, int nf);

  double getQMass(int nf);


  double getThreshold(int nset, int nf);

  double getThreshold(int nf);


  double alphasPDF(double Q);

  double alphasPDF(int nset, double Q);

  void usePDFMember(int member);

  void usePDFMember(int nset, int member);

  void initPDFSet(const std::string& name, int member=0);
  void initPDFSet(int nset ,const std::string& name, int nmem=0);
  void initPDFSet(int setid, int member=0);
  void initPDFSet(int nset , int setid, int nmem=0);
  void initPDFSet(const std::string& name, SetType type, int member=0);
  void initPDFSet(int nset, const std::string& name, SetType type, int member=0);

}

#endif
#endif