/** \file config.cpp
 * 
 * Function implementations for the class config.
 * 
 */

#include "molecules.hpp"

/************************************* Functions for class config ***************************/

/** Constructor for config file class.
 */
config::config()
{
  mainname = (char *) MallocString(sizeof(char)*MAXSTRINGSIZE,"config constructor: mainname");
  defaultpath = (char *) MallocString(sizeof(char)*MAXSTRINGSIZE,"config constructor: mainname");
  pseudopotpath = (char *) MallocString(sizeof(char)*MAXSTRINGSIZE,"config constructor: mainname");
  configpath = (char *) MallocString(sizeof(char)*MAXSTRINGSIZE,"config constructor: mainname");
  configname = (char *) MallocString(sizeof(char)*MAXSTRINGSIZE,"config constructor: mainname");
  strcpy(mainname,"pcp");
  strcpy(defaultpath,"not specified");
  strcpy(pseudopotpath,"not specified");
  configpath[0]='\0';
  configname[0]='\0';
  
  FastParsing = false;
  ProcPEGamma=8;
  ProcPEPsi=1;
  DoOutVis=0;
  DoOutMes=1;
  DoOutNICS=0;
  DoOutOrbitals=0;
  DoOutCurrent=0;
  DoPerturbation=0;
  DoFullCurrent=0;
  CommonWannier=0;
  SawtoothStart=0.01;
  VectorPlane=0;
  VectorCut=0;
  UseAddGramSch=1;
  Seed=1;
  
  MaxOuterStep=0;
  Deltat=0;
  OutVisStep=10;
  OutSrcStep=5;
  TargetTemp=0.00095004455;
  ScaleTempStep=25;
  MaxPsiStep=0;
  EpsWannier=1e-7;
  
  MaxMinStep=100;
  RelEpsTotalEnergy=1e-7;
  RelEpsKineticEnergy=1e-5;
  MaxMinStopStep=1;
  MaxMinGapStopStep=0;
  MaxInitMinStep=100;
  InitRelEpsTotalEnergy=1e-5;
  InitRelEpsKineticEnergy=1e-4;
  InitMaxMinStopStep=1;
  InitMaxMinGapStopStep=0;
  
  //BoxLength[NDIM*NDIM];
  
  ECut=128.;
  MaxLevel=5;
  RiemannTensor=0;
  LevRFactor=0;
  RiemannLevel=0;
  Lev0Factor=2;
  RTActualUse=0;
  PsiType=0;
  MaxPsiDouble=0;
  PsiMaxNoUp=0;
  PsiMaxNoDown=0;
  AddPsis=0;
  
  RCut=20.;
  StructOpt=0;
  IsAngstroem=1;
  RelativeCoord=0;
  MaxTypes=0;
};


/** Destructor for config file class.
 */
config::~config()
{
  Free((void **)&mainname, "config::~config: *mainname");
  Free((void **)&defaultpath, "config::~config: *defaultpath");
  Free((void **)&pseudopotpath, "config::~config: *pseudopotpath");
  Free((void **)&configpath, "config::~config: *configpath");
  Free((void **)&configname, "config::~config: *configname");
};

/** Displays menu for editing each entry of the config file.
 * Nothing fancy here, just lots of cout << Verbose(0)s for the menu and a switch/case
 * for each entry of the config file structure.
 */
void config::Edit(molecule *mol)
{
  char choice;
  
  do {
    cout << Verbose(0) << "===========EDIT CONFIGURATION============================" << endl;
    cout << Verbose(0) << " A - mainname (prefix for all runtime files)" << endl;
    cout << Verbose(0) << " B - Default path (for runtime files)" << endl;
    cout << Verbose(0) << " C - Path of pseudopotential files" << endl;
    cout << Verbose(0) << " D - Number of coefficient sharing processes" << endl;
    cout << Verbose(0) << " E - Number of wave function sharing processes" << endl;
    cout << Verbose(0) << " F - 0: Don't output density for OpenDX, 1: do" << endl;
    cout << Verbose(0) << " G - 0: Don't output physical data, 1: do" << endl;
    cout << Verbose(0) << " H - 0: Don't output densities of each unperturbed orbital for OpenDX, 1: do" << endl;
    cout << Verbose(0) << " I - 0: Don't output current density for OpenDX, 1: do" << endl;
    cout << Verbose(0) << " J - 0: Don't do the full current calculation, 1: do" << endl;
    cout << Verbose(0) << " K - 0: Don't do perturbation calculation to obtain susceptibility and shielding, 1: do" << endl;
    cout << Verbose(0) << " L - 0: Wannier centres as calculated, 1: common centre for all, 2: unite centres according to spread, 3: cell centre, 4: shifted to nearest grid point" << endl;
    cout << Verbose(0) << " M - Absolute begin of unphysical sawtooth transfer for position operator within cell" << endl;
    cout << Verbose(0) << " N - (0,1,2) x,y,z-plane to do two-dimensional current vector cut" << endl;
    cout << Verbose(0) << " O - Absolute position along vector cut axis for cut plane" << endl;
    cout << Verbose(0) << " P - Additional Gram-Schmidt-Orthonormalization to stabilize numerics" << endl;
    cout << Verbose(0) << " Q - Initial integer value of random number generator" << endl;
    cout << Verbose(0) << " R - for perturbation 0, for structure optimization defines upper limit of iterations" << endl;
    cout << Verbose(0) << " T - Output visual after ...th step" << endl;
    cout << Verbose(0) << " U - Output source densities of wave functions after ...th step" << endl;
    cout << Verbose(0) << " X - minimization iterations per wave function, if unsure leave at default value 0" << endl;
    cout << Verbose(0) << " Y - tolerance value for total spread in iterative Jacobi diagonalization" << endl;
    cout << Verbose(0) << " Z - Maximum number of minimization iterations" << endl;
    cout << Verbose(0) << " a - Relative change in total energy to stop min. iteration" << endl;
    cout << Verbose(0) << " b - Relative change in kinetic energy to stop min. iteration" << endl;
    cout << Verbose(0) << " c - Check stop conditions every ..th step during min. iteration" << endl;
    cout << Verbose(0) << " e - Maximum number of minimization iterations during initial level" << endl;
    cout << Verbose(0) << " f - Relative change in total energy to stop min. iteration during initial level" << endl;
    cout << Verbose(0) << " g - Relative change in kinetic energy to stop min. iteration during initial level" << endl;
    cout << Verbose(0) << " h - Check stop conditions every ..th step during min. iteration during initial level" << endl;
    cout << Verbose(0) << " j - six lower diagonal entries of matrix, defining the unit cell" << endl;
    cout << Verbose(0) << " k - Energy cutoff of plane wave basis in Hartree" << endl;
    cout << Verbose(0) << " l - Maximum number of levels in multi-level-ansatz" << endl;
    cout << Verbose(0) << " m - Factor by which grid nodes increase between standard and upper level" << endl;
    cout << Verbose(0) << " n - 0: Don't use RiemannTensor, 1: Do" << endl;
    cout << Verbose(0) << " o - Factor by which grid nodes increase between Riemann and standard(?) level" << endl;
    cout << Verbose(0) << " p - Number of Riemann levels" << endl;
    cout << Verbose(0) << " r - 0: Don't Use RiemannTensor, 1: Do" << endl;
    cout << Verbose(0) << " s - 0: Doubly occupied orbitals, 1: Up-/Down-Orbitals" << endl;
    cout << Verbose(0) << " t - Number of orbitals (depends pn SpinType)" << endl;
    cout << Verbose(0) << " u - Number of SpinUp orbitals (depends on SpinType)" << endl;
    cout << Verbose(0) << " v - Number of SpinDown orbitals (depends on SpinType)" << endl;
    cout << Verbose(0) << " w - Number of additional, unoccupied orbitals" << endl;
    cout << Verbose(0) << " x - radial cutoff for ewald summation in Bohrradii" << endl;
    cout << Verbose(0) << " y - 0: Don't do structure optimization beforehand, 1: Do" << endl;
    cout << Verbose(0) << " z - 0: Units are in Bohr radii, 1: units are in Aengstrom" << endl;
    cout << Verbose(0) << " i - 0: Coordinates given in file are absolute, 1: ... are relative to unit cell" << endl;
    cout << Verbose(0) << "=========================================================" << endl;
    cout << Verbose(0) << "INPUT: ";
    cin >> choice;
    
    switch (choice) {
        case 'A': // mainname
          cout << Verbose(0) << "Old: " << config::mainname << "\t new: ";
          cin >> config::mainname;
          break;
        case 'B': // defaultpath
          cout << Verbose(0) << "Old: " << config::defaultpath << "\t new: ";
          cin >> config::defaultpath;
          break;
        case 'C': // pseudopotpath
          cout << Verbose(0) << "Old: " << config::pseudopotpath << "\t new: ";
          cin >> config::pseudopotpath;
          break;

        case 'D': // ProcPEGamma
          cout << Verbose(0) << "Old: " << config::ProcPEGamma << "\t new: ";
          cin >> config::ProcPEGamma;
          break;
        case 'E': // ProcPEPsi
          cout << Verbose(0) << "Old: " << config::ProcPEPsi << "\t new: ";
          cin >> config::ProcPEPsi;
          break;
        case 'F': // DoOutVis
          cout << Verbose(0) << "Old: " << config::DoOutVis << "\t new: ";
          cin >> config::DoOutVis;
          break;
        case 'G': // DoOutMes
          cout << Verbose(0) << "Old: " << config::DoOutMes << "\t new: ";
          cin >> config::DoOutMes;
          break;
        case 'H': // DoOutOrbitals
          cout << Verbose(0) << "Old: " << config::DoOutOrbitals << "\t new: ";
          cin >> config::DoOutOrbitals;
          break;
        case 'I': // DoOutCurrent
          cout << Verbose(0) << "Old: " << config::DoOutCurrent << "\t new: ";
          cin >> config::DoOutCurrent;
          break;
        case 'J': // DoFullCurrent
          cout << Verbose(0) << "Old: " << config::DoFullCurrent << "\t new: ";
          cin >> config::DoFullCurrent;
          break;
        case 'K': // DoPerturbation
          cout << Verbose(0) << "Old: " << config::DoPerturbation << "\t new: ";
          cin >> config::DoPerturbation;
          break;
        case 'L': // CommonWannier
          cout << Verbose(0) << "Old: " << config::CommonWannier << "\t new: ";
          cin >> config::CommonWannier;
          break;
        case 'M': // SawtoothStart
          cout << Verbose(0) << "Old: " << config::SawtoothStart << "\t new: ";
          cin >> config::SawtoothStart;
          break;
        case 'N': // VectorPlane
          cout << Verbose(0) << "Old: " << config::VectorPlane << "\t new: ";
          cin >> config::VectorPlane;
          break;
        case 'O': // VectorCut
          cout << Verbose(0) << "Old: " << config::VectorCut << "\t new: ";
          cin >> config::VectorCut;
          break;
        case 'P': // UseAddGramSch
          cout << Verbose(0) << "Old: " << config::UseAddGramSch << "\t new: ";
          cin >> config::UseAddGramSch;
          break;
        case 'Q': // Seed
          cout << Verbose(0) << "Old: " << config::Seed << "\t new: ";
          cin >> config::Seed;
          break;

        case 'R': // MaxOuterStep
          cout << Verbose(0) << "Old: " << config::MaxOuterStep << "\t new: ";
          cin >> config::MaxOuterStep;
          break;
        case 'T': // OutVisStep
          cout << Verbose(0) << "Old: " << config::OutVisStep << "\t new: ";
          cin >> config::OutVisStep;
          break;
        case 'U': // OutSrcStep
          cout << Verbose(0) << "Old: " << config::OutSrcStep << "\t new: ";
          cin >> config::OutSrcStep;
          break;
        case 'X': // MaxPsiStep
          cout << Verbose(0) << "Old: " << config::MaxPsiStep << "\t new: ";
          cin >> config::MaxPsiStep;
          break;
        case 'Y': // EpsWannier
          cout << Verbose(0) << "Old: " << config::EpsWannier << "\t new: ";
          cin >> config::EpsWannier;
          break;

        case 'Z': // MaxMinStep
          cout << Verbose(0) << "Old: " << config::MaxMinStep << "\t new: ";
          cin >> config::MaxMinStep;
          break;
        case 'a': // RelEpsTotalEnergy
          cout << Verbose(0) << "Old: " << config::RelEpsTotalEnergy << "\t new: ";
          cin >> config::RelEpsTotalEnergy;
          break;
        case 'b': // RelEpsKineticEnergy
          cout << Verbose(0) << "Old: " << config::RelEpsKineticEnergy << "\t new: ";
          cin >> config::RelEpsKineticEnergy;
          break;
        case 'c': // MaxMinStopStep
          cout << Verbose(0) << "Old: " << config::MaxMinStopStep << "\t new: ";
          cin >> config::MaxMinStopStep;
          break;
        case 'e': // MaxInitMinStep
          cout << Verbose(0) << "Old: " << config::MaxInitMinStep << "\t new: ";
          cin >> config::MaxInitMinStep;
          break;
        case 'f': // InitRelEpsTotalEnergy
          cout << Verbose(0) << "Old: " << config::InitRelEpsTotalEnergy << "\t new: ";
          cin >> config::InitRelEpsTotalEnergy;
          break;
        case 'g': // InitRelEpsKineticEnergy
          cout << Verbose(0) << "Old: " << config::InitRelEpsKineticEnergy << "\t new: ";
          cin >> config::InitRelEpsKineticEnergy;
          break;
        case 'h': // InitMaxMinStopStep
          cout << Verbose(0) << "Old: " << config::InitMaxMinStopStep << "\t new: ";
          cin >> config::InitMaxMinStopStep;
          break;
        
        case 'j': // BoxLength
          cout << Verbose(0) << "enter lower triadiagonalo form of basis matrix" << endl << endl;
          for (int i=6;i--;) {
            cout << Verbose(0) << "Cell size" << i << ": ";
            cin >> mol->cell_size[i];
          }
          break;
        
        case 'k': // ECut
          cout << Verbose(0) << "Old: " << config::ECut << "\t new: ";
          cin >> config::ECut;
          break;
        case 'l': // MaxLevel
          cout << Verbose(0) << "Old: " << config::MaxLevel << "\t new: ";
          cin >> config::MaxLevel;
          break;
        case 'm': // RiemannTensor
          cout << Verbose(0) << "Old: " << config::RiemannTensor << "\t new: ";
          cin >> config::RiemannTensor;
          break;
        case 'n': // LevRFactor
          cout << Verbose(0) << "Old: " << config::LevRFactor << "\t new: ";
          cin >> config::LevRFactor;
          break;
        case 'o': // RiemannLevel
          cout << Verbose(0) << "Old: " << config::RiemannLevel << "\t new: ";
          cin >> config::RiemannLevel;
          break;
        case 'p': // Lev0Factor
          cout << Verbose(0) << "Old: " << config::Lev0Factor << "\t new: ";
          cin >> config::Lev0Factor;
          break;
        case 'r': // RTActualUse
          cout << Verbose(0) << "Old: " << config::RTActualUse << "\t new: ";
          cin >> config::RTActualUse;
          break;
        case 's': // PsiType
          cout << Verbose(0) << "Old: " << config::PsiType << "\t new: ";
          cin >> config::PsiType;
          break;
        case 't': // MaxPsiDouble
          cout << Verbose(0) << "Old: " << config::MaxPsiDouble << "\t new: ";
          cin >> config::MaxPsiDouble;
          break;
        case 'u': // PsiMaxNoUp
          cout << Verbose(0) << "Old: " << config::PsiMaxNoUp << "\t new: ";
          cin >> config::PsiMaxNoUp;
          break;
        case 'v': // PsiMaxNoDown
          cout << Verbose(0) << "Old: " << config::PsiMaxNoDown << "\t new: ";
          cin >> config::PsiMaxNoDown;
          break;
        case 'w': // AddPsis
          cout << Verbose(0) << "Old: " << config::AddPsis << "\t new: ";
          cin >> config::AddPsis;
          break;

        case 'x': // RCut
          cout << Verbose(0) << "Old: " << config::RCut << "\t new: ";
          cin >> config::RCut;
          break;
        case 'y': // StructOpt
          cout << Verbose(0) << "Old: " << config::StructOpt << "\t new: ";
          cin >> config::StructOpt;
          break;
        case 'z': // IsAngstroem
          cout << Verbose(0) << "Old: " << config::IsAngstroem << "\t new: ";
          cin >> config::IsAngstroem;
          break;
        case 'i': // RelativeCoord
          cout << Verbose(0) << "Old: " << config::RelativeCoord << "\t new: ";
          cin >> config::RelativeCoord;
          break;
    };
  } while (choice != 'q');
};

/** Tests whether a given configuration file adhears to old or new syntax.
 * \param *filename filename of config file to be tested
 * \param *periode pointer to a periodentafel class with all elements
 * \param *mol pointer to molecule containing all atoms of the molecule
 * \return 0 - old syntax, 1 - new syntax, -1 - unknown syntax 
 */
int config::TestSyntax(char *filename, periodentafel *periode, molecule *mol)
{
  int test;
  ifstream file(filename);
  
  // search file for keyword: ProcPEGamma (new syntax)
  if (ParseForParameter(1,&file,"ProcPEGamma", 0, 1, 1, int_type, &test, 1, optional)) {
    file.close();
    return 1;
  }
  // search file for keyword: ProcsGammaPsi (old syntax)
  if (ParseForParameter(1,&file,"ProcsGammaPsi", 0, 1, 1, int_type, &test, 1, optional)) {
    file.close();
    return 0;
  }
  file.close();
  return -1;
}

/** Returns private config::IsAngstroem.
 * \return IsAngstroem
 */
bool config::GetIsAngstroem() const
{
  return (IsAngstroem == 1);
};

/** Returns private config::*defaultpath.
 * \return *defaultpath
 */
char * config::GetDefaultPath() const
{
  return defaultpath;
};


/** Returns private config::*defaultpath.
 * \return *defaultpath
 */
void config::SetDefaultPath(const char *path)
{
  strcpy(defaultpath, path);
};

/** Retrieves the path in the given config file name.
 * \param filename config file string
 */
void config::RetrieveConfigPathAndName(string filename)
{
  char *ptr = NULL;
  char *buffer = new char[MAXSTRINGSIZE];
  strncpy(buffer, filename.c_str(), MAXSTRINGSIZE);
  int last = -1;
  for(last=MAXSTRINGSIZE;last--;) {
    if (buffer[last] == '/')
      break;
  }
  if (last == -1) { // no path in front, set to local directory.
    strcpy(configpath, "./");
    ptr = buffer;
  } else {
    strncpy(configpath, buffer, last+1);
    ptr = &buffer[last+1];
    if (last < 254)
      configpath[last+1]='\0';
  }
  strcpy(configname, ptr);
  cout << "Found configpath: " << configpath << ", dir slash was found at " << last << ", config name is " << configname << "." << endl;
  delete[](buffer);
};


/** Initializes config file structure by loading elements from a give file.
 * \param *file input file stream being the opened config file
 * \param *periode pointer to a periodentafel class with all elements
 * \param *mol pointer to molecule containing all atoms of the molecule 
 */
void config::Load(char *filename, periodentafel *periode, molecule *mol)
{
  ifstream *file = new ifstream(filename);
  if (file == NULL) {
    cerr << "ERROR: config file " << filename << " missing!" << endl;
    return;
  }
  RetrieveConfigPathAndName(filename);
  // ParseParameters
  
  /* Oeffne Hauptparameterdatei */
  int di;
  double BoxLength[9];
  string zeile;
  string dummy;
  element *elementhash[MAX_ELEMENTS];
  char name[MAX_ELEMENTS];
  char keyword[MAX_ELEMENTS];
  int Z, No[MAX_ELEMENTS];
  int verbose = 0;
  
  /* Namen einlesen */

  ParseForParameter(verbose,file, "mainname", 0, 1, 1, string_type, (config::mainname), 1, critical);
  ParseForParameter(verbose,file, "defaultpath", 0, 1, 1, string_type, (config::defaultpath), 1, critical);
  ParseForParameter(verbose,file, "pseudopotpath", 0, 1, 1, string_type, (config::pseudopotpath), 1, critical);
  ParseForParameter(verbose,file,"ProcPEGamma", 0, 1, 1, int_type, &(config::ProcPEGamma), 1, critical);
  ParseForParameter(verbose,file,"ProcPEPsi", 0, 1, 1, int_type, &(config::ProcPEPsi), 1, critical);

  if (!ParseForParameter(verbose,file,"Seed", 0, 1, 1, int_type, &(config::Seed), 1, optional))
    config::Seed = 1;

  if(!ParseForParameter(verbose,file,"DoOutOrbitals", 0, 1, 1, int_type, &(config::DoOutOrbitals), 1, optional)) {
    config::DoOutOrbitals = 0;
  } else {
    if (config::DoOutOrbitals < 0) config::DoOutOrbitals = 0;
    if (config::DoOutOrbitals > 1) config::DoOutOrbitals = 1;
  }
  ParseForParameter(verbose,file,"DoOutVis", 0, 1, 1, int_type, &(config::DoOutVis), 1, critical);
  if (config::DoOutVis < 0) config::DoOutVis = 0;
  if (config::DoOutVis > 1) config::DoOutVis = 1;
  if (!ParseForParameter(verbose,file,"VectorPlane", 0, 1, 1, int_type, &(config::VectorPlane), 1, optional))
    config::VectorPlane = -1;
  if (!ParseForParameter(verbose,file,"VectorCut", 0, 1, 1, double_type, &(config::VectorCut), 1, optional))
    config::VectorCut = 0.;
  ParseForParameter(verbose,file,"DoOutMes", 0, 1, 1, int_type, &(config::DoOutMes), 1, critical);
  if (config::DoOutMes < 0) config::DoOutMes = 0;
  if (config::DoOutMes > 1) config::DoOutMes = 1;
  if (!ParseForParameter(verbose,file,"DoOutCurr", 0, 1, 1, int_type, &(config::DoOutCurrent), 1, optional))
    config::DoOutCurrent = 0;
  if (config::DoOutCurrent < 0) config::DoOutCurrent = 0;
  if (config::DoOutCurrent > 1) config::DoOutCurrent = 1; 
  ParseForParameter(verbose,file,"AddGramSch", 0, 1, 1, int_type, &(config::UseAddGramSch), 1, critical);
  if (config::UseAddGramSch < 0) config::UseAddGramSch = 0;
  if (config::UseAddGramSch > 2) config::UseAddGramSch = 2;
  if(!ParseForParameter(verbose,file,"CommonWannier", 0, 1, 1, int_type, &(config::CommonWannier), 1, optional)) {
    config::CommonWannier = 0;
  } else {
    if (config::CommonWannier < 0) config::CommonWannier = 0;
    if (config::CommonWannier > 4) config::CommonWannier = 4;
  }
  if(!ParseForParameter(verbose,file,"SawtoothStart", 0, 1, 1, double_type, &(config::SawtoothStart), 1, optional)) {
    config::SawtoothStart = 0.01;
  } else {
    if (config::SawtoothStart < 0.) config::SawtoothStart = 0.;
    if (config::SawtoothStart > 1.) config::SawtoothStart = 1.;
  }
  
  ParseForParameter(verbose,file,"MaxOuterStep", 0, 1, 1, int_type, &(config::MaxOuterStep), 1, critical);
  ParseForParameter(verbose,file,"Deltat", 0, 1, 1, double_type, &(config::Deltat), 1, optional);
  ParseForParameter(verbose,file,"OutVisStep", 0, 1, 1, int_type, &(config::OutVisStep), 1, optional);
  ParseForParameter(verbose,file,"OutSrcStep", 0, 1, 1, int_type, &(config::OutSrcStep), 1, optional);
  ParseForParameter(verbose,file,"TargetTemp", 0, 1, 1, double_type, &(config::TargetTemp), 1, optional);
  //ParseForParameter(verbose,file,"Thermostat", 0, 1, 1, int_type, &(config::ScaleTempStep), 1, optional);
  if (!ParseForParameter(verbose,file,"EpsWannier", 0, 1, 1, double_type, &(config::EpsWannier), 1, optional))
    config::EpsWannier = 1e-8;
  
  // stop conditions
  //if (config::MaxOuterStep <= 0) config::MaxOuterStep = 1;
  ParseForParameter(verbose,file,"MaxPsiStep", 0, 1, 1, int_type, &(config::MaxPsiStep), 1, critical);
  if (config::MaxPsiStep <= 0) config::MaxPsiStep = 3;
  
  ParseForParameter(verbose,file,"MaxMinStep", 0, 1, 1, int_type, &(config::MaxMinStep), 1, critical);
  ParseForParameter(verbose,file,"RelEpsTotalE", 0, 1, 1, double_type, &(config::RelEpsTotalEnergy), 1, critical);
  ParseForParameter(verbose,file,"RelEpsKineticE", 0, 1, 1, double_type, &(config::RelEpsKineticEnergy), 1, critical);
  ParseForParameter(verbose,file,"MaxMinStopStep", 0, 1, 1, int_type, &(config::MaxMinStopStep), 1, critical);
  ParseForParameter(verbose,file,"MaxMinGapStopStep", 0, 1, 1, int_type, &(config::MaxMinGapStopStep), 1, critical);
  if (config::MaxMinStep <= 0) config::MaxMinStep = config::MaxPsiStep;
  if (config::MaxMinStopStep < 1) config::MaxMinStopStep = 1;
  if (config::MaxMinGapStopStep < 1) config::MaxMinGapStopStep = 1;
  
  ParseForParameter(verbose,file,"MaxInitMinStep", 0, 1, 1, int_type, &(config::MaxInitMinStep), 1, critical);
  ParseForParameter(verbose,file,"InitRelEpsTotalE", 0, 1, 1, double_type, &(config::InitRelEpsTotalEnergy), 1, critical);
  ParseForParameter(verbose,file,"InitRelEpsKineticE", 0, 1, 1, double_type, &(config::InitRelEpsKineticEnergy), 1, critical);
  ParseForParameter(verbose,file,"InitMaxMinStopStep", 0, 1, 1, int_type, &(config::InitMaxMinStopStep), 1, critical);
  ParseForParameter(verbose,file,"InitMaxMinGapStopStep", 0, 1, 1, int_type, &(config::InitMaxMinGapStopStep), 1, critical);
  if (config::MaxInitMinStep <= 0) config::MaxInitMinStep = config::MaxPsiStep;
  if (config::InitMaxMinStopStep < 1) config::InitMaxMinStopStep = 1;
  if (config::InitMaxMinGapStopStep < 1) config::InitMaxMinGapStopStep = 1;
  
  // Unit cell and magnetic field
  ParseForParameter(verbose,file, "BoxLength", 0, 3, 3, lower_trigrid, BoxLength, 1, critical); /* Lattice->RealBasis */
  mol->cell_size[0] = BoxLength[0];
  mol->cell_size[1] = BoxLength[3];
  mol->cell_size[2] = BoxLength[4];
  mol->cell_size[3] = BoxLength[6];
  mol->cell_size[4] = BoxLength[7];
  mol->cell_size[5] = BoxLength[8];
  if (1) fprintf(stderr,"\n");

  ParseForParameter(verbose,file,"DoPerturbation", 0, 1, 1, int_type, &(config::DoPerturbation), 1, optional);
  ParseForParameter(verbose,file,"DoOutNICS", 0, 1, 1, int_type, &(config::DoOutNICS), 1, optional);
  if (!ParseForParameter(verbose,file,"DoFullCurrent", 0, 1, 1, int_type, &(config::DoFullCurrent), 1, optional))
    config::DoFullCurrent = 0;
  if (config::DoFullCurrent < 0) config::DoFullCurrent = 0;
  if (config::DoFullCurrent > 2) config::DoFullCurrent = 2; 
  if (config::DoOutNICS < 0) config::DoOutNICS = 0;
  if (config::DoOutNICS > 2) config::DoOutNICS = 2; 
  if (config::DoPerturbation == 0) {
    config::DoFullCurrent = 0;
    config::DoOutNICS = 0;
  }

  ParseForParameter(verbose,file,"ECut", 0, 1, 1, double_type, &(config::ECut), 1, critical);
  ParseForParameter(verbose,file,"MaxLevel", 0, 1, 1, int_type, &(config::MaxLevel), 1, critical);
  ParseForParameter(verbose,file,"Level0Factor", 0, 1, 1, int_type, &(config::Lev0Factor), 1, critical);
  if (config::Lev0Factor < 2) {
    config::Lev0Factor = 2;
  }
  ParseForParameter(verbose,file,"RiemannTensor", 0, 1, 1, int_type, &di, 1, critical);
  if (di >= 0 && di < 2) {
    config::RiemannTensor = di;
  } else {
    fprintf(stderr, "0 <= RiemanTensor < 2: 0 UseNotRT, 1 UseRT");
    exit(1); 
  }
  switch (config::RiemannTensor) {
    case 0: //UseNoRT
      if (config::MaxLevel < 2) {
        config::MaxLevel = 2;
      }
      config::LevRFactor = 2;
      config::RTActualUse = 0;
      break;
    case 1: // UseRT
      if (config::MaxLevel < 3) {
        config::MaxLevel = 3;
      }
      ParseForParameter(verbose,file,"RiemannLevel", 0, 1, 1, int_type, &(config::RiemannLevel), 1, critical);
      if (config::RiemannLevel < 2) {
        config::RiemannLevel = 2;
      } 
      if (config::RiemannLevel > config::MaxLevel-1) {
        config::RiemannLevel = config::MaxLevel-1;
      }
      ParseForParameter(verbose,file,"LevRFactor", 0, 1, 1, int_type, &(config::LevRFactor), 1, critical);
      if (config::LevRFactor < 2) {
        config::LevRFactor = 2;
      } 
      config::Lev0Factor = 2;
      config::RTActualUse = 2;
      break;
  }
  ParseForParameter(verbose,file,"PsiType", 0, 1, 1, int_type, &di, 1, critical);
  if (di >= 0 && di < 2) {
    config::PsiType = di;
  } else {
    fprintf(stderr, "0 <= PsiType < 2: 0 UseSpinDouble, 1 UseSpinUpDown");
    exit(1); 
  }
  switch (config::PsiType) {
  case 0: // SpinDouble
    ParseForParameter(verbose,file,"MaxPsiDouble", 0, 1, 1, int_type, &(config::MaxPsiDouble), 1, critical);
    ParseForParameter(verbose,file,"AddPsis", 0, 1, 1, int_type, &(config::AddPsis), 1, optional);
    break;
  case 1: // SpinUpDown
    if (config::ProcPEGamma % 2) config::ProcPEGamma*=2;
    ParseForParameter(verbose,file,"PsiMaxNoUp", 0, 1, 1, int_type, &(config::PsiMaxNoUp), 1, critical);
    ParseForParameter(verbose,file,"PsiMaxNoDown", 0, 1, 1, int_type, &(config::PsiMaxNoDown), 1, critical);
    ParseForParameter(verbose,file,"AddPsis", 0, 1, 1, int_type, &(config::AddPsis), 1, optional);
    break;
  }
  
  // IonsInitRead
  
  ParseForParameter(verbose,file,"RCut", 0, 1, 1, double_type, &(config::RCut), 1, critical);
  ParseForParameter(verbose,file,"IsAngstroem", 0, 1, 1, int_type, &(config::IsAngstroem), 1, critical);
  ParseForParameter(verbose,file,"MaxTypes", 0, 1, 1, int_type, &(config::MaxTypes), 1, critical);
  if (!ParseForParameter(verbose,file,"RelativeCoord", 0, 1, 1, int_type, &(config::RelativeCoord) , 1, optional))
    config::RelativeCoord = 0;
  if (!ParseForParameter(verbose,file,"StructOpt", 0, 1, 1, int_type, &(config::StructOpt), 1, optional))
    config::StructOpt = 0;
  // prescan number of ions per type
  cout << Verbose(0) << "Prescanning ions per type: " << endl;
  for (int i=0; i < config::MaxTypes; i++) {
    sprintf(name,"Ion_Type%i",i+1);
    ParseForParameter(verbose,file, (const char*)name, 0, 1, 1, int_type, &No[i], 1, critical);
    ParseForParameter(verbose,file, name, 0, 2, 1, int_type, &Z, 1, critical);
    elementhash[i] = periode->FindElement(Z);
    cout << Verbose(1) << i << ". Z = " << elementhash[i]->Z << " with " << No[i] << " ions." << endl; 
  }
  for (int i=0; i < config::MaxTypes; i++) {
    sprintf(name,"Ion_Type%i",i+1);
    for(int j=0;j<No[i];j++) {
      int repetition = 1; // which repeated keyword shall be read
      sprintf(keyword,"%s_%i",name, j+1);
      atom *neues = new atom();
      // then parse for each atom the coordinates as often as present
      if (!FastParsing) {
        while (ParseForParameter(verbose,file, keyword, 0, 1, 1, double_type, &neues->x.x[0], repetition, (repetition == 1) ? critical : optional) &&
          ParseForParameter(verbose,file, keyword, 0, 2, 1, double_type, &neues->x.x[1], repetition, (repetition == 1) ? critical : optional) &&
          ParseForParameter(verbose,file, keyword, 0, 3, 1, double_type, &neues->x.x[2], repetition, (repetition == 1) ? critical : optional))
          repetition++;
        repetition--;
        //cout << "Found " << repetition << " times of the keyword " << keyword << "." << endl;
      }
      ParseForParameter(verbose,file, keyword, 0, 1, 1, double_type, &neues->x.x[0], repetition,critical);
      ParseForParameter(verbose,file, keyword, 0, 2, 1, double_type, &neues->x.x[1], repetition,critical);
      ParseForParameter(verbose,file, keyword, 0, 3, 1, double_type, &neues->x.x[2], repetition,critical);
      ParseForParameter(verbose,file, keyword, 0, 4, 1, int_type, &neues->FixedIon, repetition,critical);
      if(!ParseForParameter(verbose,file, keyword, 0, 5, 1, double_type, &neues->v.x[0], repetition,optional))
        neues->v.x[0] = 0.;
      if(!ParseForParameter(verbose,file, keyword, 0, 6, 1, double_type, &neues->v.x[1], repetition,optional))
        neues->v.x[1] = 0.;
      if(!ParseForParameter(verbose,file, keyword, (int)FastParsing, 7, 1, double_type, &neues->v.x[2], repetition,optional))
        neues->v.x[2] = 0.;
      neues->type = elementhash[i]; // find element type
      mol->AddAtom(neues);
    }
  }
  file->close();
  delete(file);
};

/** Initializes config file structure by loading elements from a give file with old pcp syntax.
 * \param *file input file stream being the opened config file with old pcp syntax
 * \param *periode pointer to a periodentafel class with all elements
 * \param *mol pointer to molecule containing all atoms of the molecule 
 */
void config::LoadOld(char *filename, periodentafel *periode, molecule *mol)
{
  ifstream *file = new ifstream(filename);
  if (file == NULL) {
    cerr << "ERROR: config file " << filename << " missing!" << endl;
    return;
  }
  RetrieveConfigPathAndName(filename);
  // ParseParameters
  
  /* Oeffne Hauptparameterdatei */
  int l, i, di;
  double a,b;
  double BoxLength[9];
  string zeile;
  string dummy;
  element *elementhash[128];
  int Z, No, AtomNo, found;
  int verbose = 0;
  
  /* Namen einlesen */

  ParseForParameter(verbose,file, "mainname", 0, 1, 1, string_type, (config::mainname), 1, critical);
  ParseForParameter(verbose,file, "defaultpath", 0, 1, 1, string_type, (config::defaultpath), 1, critical);
  ParseForParameter(verbose,file, "pseudopotpath", 0, 1, 1, string_type, (config::pseudopotpath), 1, critical);
  ParseForParameter(verbose,file, "ProcsGammaPsi", 0, 1, 1, int_type, &(config::ProcPEGamma), 1, critical);
  ParseForParameter(verbose,file, "ProcsGammaPsi", 0, 2, 1, int_type, &(config::ProcPEPsi), 1, critical);
  config::Seed = 1;
  config::DoOutOrbitals = 0;
  ParseForParameter(verbose,file,"DoOutVis", 0, 1, 1, int_type, &(config::DoOutVis), 1, critical);
  if (config::DoOutVis < 0) config::DoOutVis = 0;
  if (config::DoOutVis > 1) config::DoOutVis = 1;
  config::VectorPlane = -1;
  config::VectorCut = 0.;
  ParseForParameter(verbose,file,"DoOutMes", 0, 1, 1, int_type, &(config::DoOutMes), 1, critical);
  if (config::DoOutMes < 0) config::DoOutMes = 0;
  if (config::DoOutMes > 1) config::DoOutMes = 1;
  config::DoOutCurrent = 0;
  ParseForParameter(verbose,file,"AddGramSch", 0, 1, 1, int_type, &(config::UseAddGramSch), 1, critical);
  if (config::UseAddGramSch < 0) config::UseAddGramSch = 0;
  if (config::UseAddGramSch > 2) config::UseAddGramSch = 2;
  config::CommonWannier = 0;
  config::SawtoothStart = 0.01;

  ParseForParameter(verbose,file,"MaxOuterStep", 0, 1, 1, double_type, &(config::MaxOuterStep), 1, critical);
  ParseForParameter(verbose,file,"Deltat", 0, 1, 1, double_type, &(config::Deltat), 1, optional);
  ParseForParameter(verbose,file,"VisOuterStep", 0, 1, 1, int_type, &(config::OutVisStep), 1, optional);
  ParseForParameter(verbose,file,"VisSrcOuterStep", 0, 1, 1, int_type, &(config::OutSrcStep), 1, optional);
  ParseForParameter(verbose,file,"TargetTemp", 0, 1, 1, double_type, &(config::TargetTemp), 1, optional);
  ParseForParameter(verbose,file,"ScaleTempStep", 0, 1, 1, int_type, &(config::ScaleTempStep), 1, optional);
  config::EpsWannier = 1e-8;
  
  // stop conditions
  //if (config::MaxOuterStep <= 0) config::MaxOuterStep = 1;
  ParseForParameter(verbose,file,"MaxPsiStep", 0, 1, 1, int_type, &(config::MaxPsiStep), 1, critical);
  if (config::MaxPsiStep <= 0) config::MaxPsiStep = 3;
  
  ParseForParameter(verbose,file,"MaxMinStep", 0, 1, 1, int_type, &(config::MaxMinStep), 1, critical);
  ParseForParameter(verbose,file,"MaxMinStep", 0, 2, 1, double_type, &(config::RelEpsTotalEnergy), 1, critical);
  ParseForParameter(verbose,file,"MaxMinStep", 0, 3, 1, double_type, &(config::RelEpsKineticEnergy), 1, critical);
  ParseForParameter(verbose,file,"MaxMinStep", 0, 4, 1, int_type, &(config::MaxMinStopStep), 1, critical);
  if (config::MaxMinStep <= 0) config::MaxMinStep = config::MaxPsiStep;
  if (config::MaxMinStopStep < 1) config::MaxMinStopStep = 1;
  config::MaxMinGapStopStep = 1;
  
  ParseForParameter(verbose,file,"MaxInitMinStep", 0, 1, 1, int_type, &(config::MaxInitMinStep), 1, critical);
  ParseForParameter(verbose,file,"MaxInitMinStep", 0, 2, 1, double_type, &(config::InitRelEpsTotalEnergy), 1, critical);
  ParseForParameter(verbose,file,"MaxInitMinStep", 0, 3, 1, double_type, &(config::InitRelEpsKineticEnergy), 1, critical);
  ParseForParameter(verbose,file,"MaxInitMinStep", 0, 4, 1, int_type, &(config::InitMaxMinStopStep), 1, critical);
  if (config::MaxInitMinStep <= 0) config::MaxInitMinStep = config::MaxPsiStep;
  if (config::InitMaxMinStopStep < 1) config::InitMaxMinStopStep = 1;
  config::InitMaxMinGapStopStep = 1;

  ParseForParameter(verbose,file, "BoxLength", 0, 3, 3, lower_trigrid, BoxLength, 1, critical); /* Lattice->RealBasis */
  mol->cell_size[0] = BoxLength[0];
  mol->cell_size[1] = BoxLength[3];
  mol->cell_size[2] = BoxLength[4];
  mol->cell_size[3] = BoxLength[6];
  mol->cell_size[4] = BoxLength[7];
  mol->cell_size[5] = BoxLength[8];
  if (1) fprintf(stderr,"\n");
  config::DoPerturbation = 0;
  config::DoFullCurrent = 0;

  ParseForParameter(verbose,file,"ECut", 0, 1, 1, double_type, &(config::ECut), 1, critical);
  ParseForParameter(verbose,file,"MaxLevel", 0, 1, 1, int_type, &(config::MaxLevel), 1, critical);
  ParseForParameter(verbose,file,"Level0Factor", 0, 1, 1, int_type, &(config::Lev0Factor), 1, critical);
  if (config::Lev0Factor < 2) {
    config::Lev0Factor = 2;
  }
  ParseForParameter(verbose,file,"RiemannTensor", 0, 1, 1, int_type, &di, 1, critical);
  if (di >= 0 && di < 2) {
    config::RiemannTensor = di;
  } else {
    fprintf(stderr, "0 <= RiemanTensor < 2: 0 UseNotRT, 1 UseRT");
    exit(1); 
  }
  switch (config::RiemannTensor) {
    case 0: //UseNoRT
      if (config::MaxLevel < 2) {
        config::MaxLevel = 2;
      }
      config::LevRFactor = 2;
      config::RTActualUse = 0;
      break;
    case 1: // UseRT
      if (config::MaxLevel < 3) {
        config::MaxLevel = 3;
      }
      ParseForParameter(verbose,file,"RiemannLevel", 0, 1, 1, int_type, &(config::RiemannLevel), 1, critical);
      if (config::RiemannLevel < 2) {
        config::RiemannLevel = 2;
      } 
      if (config::RiemannLevel > config::MaxLevel-1) {
        config::RiemannLevel = config::MaxLevel-1;
      }
      ParseForParameter(verbose,file,"LevRFactor", 0, 1, 1, int_type, &(config::LevRFactor), 1, critical);
      if (config::LevRFactor < 2) {
        config::LevRFactor = 2;
      } 
      config::Lev0Factor = 2;
      config::RTActualUse = 2;
      break;
  }
  ParseForParameter(verbose,file,"PsiType", 0, 1, 1, int_type, &di, 1, critical);
  if (di >= 0 && di < 2) {
    config::PsiType = di;
  } else {
    fprintf(stderr, "0 <= PsiType < 2: 0 UseSpinDouble, 1 UseSpinUpDown");
    exit(1); 
  }
  switch (config::PsiType) {
  case 0: // SpinDouble
    ParseForParameter(verbose,file,"MaxPsiDouble", 0, 1, 1, int_type, &(config::MaxPsiDouble), 1, critical);
    config::AddPsis = 0;
    break;
  case 1: // SpinUpDown
    if (config::ProcPEGamma % 2) config::ProcPEGamma*=2;
    ParseForParameter(verbose,file,"MaxPsiUp", 0, 1, 1, int_type, &(config::PsiMaxNoUp), 1, critical);
    ParseForParameter(verbose,file,"MaxPsiDown", 0, 1, 1, int_type, &(config::PsiMaxNoDown), 1, critical);
    config::AddPsis = 0;
    break;
  }
  
  // IonsInitRead
  
  ParseForParameter(verbose,file,"RCut", 0, 1, 1, double_type, &(config::RCut), 1, critical);
  ParseForParameter(verbose,file,"IsAngstroem", 0, 1, 1, int_type, &(config::IsAngstroem), 1, critical);
  config::RelativeCoord = 0;
  config::StructOpt = 0;

  // Routine from builder.cpp
  
  
  for (i=MAX_ELEMENTS;i--;) 
    elementhash[i] = NULL;
  cout << Verbose(0) << "Parsing Ions ..." << endl;
  No=0;
  found = 0;
  while (getline(*file,zeile,'\n')) {
    if (zeile.find("Ions_Data") == 0) {
      cout << Verbose(1) << "found Ions_Data...begin parsing" << endl;
      found ++;
    }
    if (found > 0) {
      if (zeile.find("Ions_Data") == 0) 
        getline(*file,zeile,'\n'); // read next line and parse this one
      istringstream input(zeile);
      input >> AtomNo;  // number of atoms
      input >> Z;       // atomic number
      input >> a;
      input >> l;
      input >> l;
      input >> b;     // element mass
      elementhash[No] = periode->FindElement(Z);
      cout << Verbose(1) << "AtomNo: " << AtomNo << "\tZ: " << Z << "\ta:" << a << "\tl:"  << l << "\b:" << b << "\tElement:" << elementhash[No] << "\t:" << endl;
      for(i=0;i<AtomNo;i++) {
        if (!getline(*file,zeile,'\n')) {// parse on and on
          cout << Verbose(2) << "Error: Too few items in ionic list of element" << elementhash[No] << "." << endl << "Exiting." << endl;
          // return 1;
        } else {
          //cout << Verbose(2) << "Reading line: " << zeile << endl;
        }
        istringstream input2(zeile);
        atom *neues = new atom();
        input2 >> neues->x.x[0]; // x
        input2 >> neues->x.x[1]; // y
        input2 >> neues->x.x[2]; // z
        input2 >> l;
        neues->type = elementhash[No]; // find element type
        mol->AddAtom(neues);
      }
      No++;
    }
  }   
  file->close();
  delete(file);
};

/** Stores all elements of config structure from which they can be re-read.
 * \param output open output *file stream to write to
 * \param *periode pointer to a periodentafel class with all elements
 * \param *mol pointer to molecule containing all atoms of the molecule 
 */
bool config::Save(ofstream *output, periodentafel *periode, molecule *mol) const
{
  bool result = true;
	// bring MaxTypes up to date
	mol->CountElements();
  if (output != NULL) {
    *output << "# ParallelCarParinello - main configuration file - created with molecuilder" << endl;
    *output << endl;
    *output << "mainname\t" << config::mainname << "\t# programm name (for runtime files)" << endl;
    *output << "defaultpath\t" << config::defaultpath << "\t# where to put files during runtime" << endl;
    *output << "pseudopotpath\t" << config::pseudopotpath << "\t# where to find pseudopotentials" << endl;
    *output << endl;
    *output << "ProcPEGamma\t" << config::ProcPEGamma << "\t# for parallel computing: share constants" << endl;
    *output << "ProcPEPsi\t" << config::ProcPEPsi << "\t# for parallel computing: share wave functions" << endl;
    *output << "DoOutVis\t" << config::DoOutVis << "\t# Output data for OpenDX" << endl;
    *output << "DoOutMes\t" << config::DoOutMes << "\t# Output data for measurements" << endl;
    *output << "DoOutOrbitals\t" << config::DoOutOrbitals << "\t# Output all Orbitals" << endl;
    *output << "DoOutCurr\t" << config::DoOutCurrent << "\t# Ouput current density for OpenDx" << endl;
    *output << "DoOutNICS\t" << config::DoOutNICS << "\t# Output Nucleus independent current shieldings" << endl;
    *output << "DoPerturbation\t" << config::DoPerturbation << "\t# Do perturbation calculate and determine susceptibility and shielding" << endl;
    *output << "DoFullCurrent\t" << config::DoFullCurrent << "\t# Do full perturbation" << endl;
    *output << "CommonWannier\t" << config::CommonWannier << "\t# Put virtual centers at indivual orbits, all common, merged by variance, to grid point, to cell center" << endl;
    *output << "SawtoothStart\t" << config::SawtoothStart << "\t# Absolute value for smooth transition at cell border " << endl;
    *output << "VectorPlane\t" << config::VectorPlane << "\t# Cut plane axis (x, y or z: 0,1,2) for two-dim current vector plot" << endl;
    *output << "VectorCut\t" << config::VectorCut << "\t# Cut plane axis value" << endl;
    *output << "AddGramSch\t" << config::UseAddGramSch << "\t# Additional GramSchmidtOrtogonalization to be safe" << endl;
    *output << "Seed\t\t" << config::Seed << "\t# initial value for random seed for Psi coefficients" << endl;
    *output << endl;
    *output << "MaxOuterStep\t" << config::MaxOuterStep << "\t# number of MolecularDynamics/Structure optimization steps" << endl;
    *output << "Deltat\t" << config::Deltat << "\t# time per MD step" << endl;
    *output << "OutVisStep\t" << config::OutVisStep << "\t# Output visual data every ...th step" << endl;
    *output << "OutSrcStep\t" << config::OutSrcStep << "\t# Output \"restart\" data every ..th step" << endl;
    *output << "TargetTemp\t" << config::TargetTemp << "\t# Target temperature" << endl;
    *output << "MaxPsiStep\t" << config::MaxPsiStep << "\t# number of Minimisation steps per state (0 - default)" << endl;
    *output << "EpsWannier\t" << config::EpsWannier << "\t# tolerance value for spread minimisation of orbitals" << endl;
    *output << endl;
    *output << "# Values specifying when to stop" << endl;
    *output << "MaxMinStep\t" << config::MaxMinStep << "\t# Maximum number of steps" << endl;
    *output << "RelEpsTotalE\t" << config::RelEpsTotalEnergy << "\t# relative change in total energy" << endl;
    *output << "RelEpsKineticE\t" << config::RelEpsKineticEnergy << "\t# relative change in kinetic energy" << endl;
    *output << "MaxMinStopStep\t" << config::MaxMinStopStep << "\t# check every ..th steps" << endl;
    *output << "MaxMinGapStopStep\t" << config::MaxMinGapStopStep << "\t# check every ..th steps" << endl;
    *output << endl;
    *output << "# Values specifying when to stop for INIT, otherwise same as above" << endl;
    *output << "MaxInitMinStep\t" << config::MaxInitMinStep << "\t# Maximum number of steps" << endl;
    *output << "InitRelEpsTotalE\t" << config::InitRelEpsTotalEnergy << "\t# relative change in total energy" << endl;
    *output << "InitRelEpsKineticE\t" << config::InitRelEpsKineticEnergy << "\t# relative change in kinetic energy" << endl;
    *output << "InitMaxMinStopStep\t" << config::InitMaxMinStopStep << "\t# check every ..th steps" << endl;
    *output << "InitMaxMinGapStopStep\t" << config::InitMaxMinGapStopStep << "\t# check every ..th steps" << endl;
    *output << endl;
    *output << "BoxLength\t\t\t# (Length of a unit cell)" << endl;
    *output << mol->cell_size[0] << "\t" << endl;
    *output << mol->cell_size[1] << "\t" << mol->cell_size[2] << "\t" << endl;
    *output << mol->cell_size[3] << "\t" << mol->cell_size[4] << "\t" << mol->cell_size[5] << "\t" << endl;
    // FIXME
    *output << endl;
    *output << "ECut\t\t" << config::ECut << "\t# energy cutoff for discretization in Hartrees" << endl;
    *output << "MaxLevel\t" << config::MaxLevel << "\t# number of different levels in the code, >=2" << endl;
    *output << "Level0Factor\t" << config::Lev0Factor << "\t# factor by which node number increases from S to 0 level" << endl;
    *output << "RiemannTensor\t" << config::RiemannTensor << "\t# (Use metric)" << endl;
    switch (config::RiemannTensor) {
      case 0: //UseNoRT
        break;
      case 1: // UseRT
        *output << "RiemannLevel\t" << config::RiemannLevel << "\t# Number of Riemann Levels" << endl;
        *output << "LevRFactor\t" << config::LevRFactor << "\t# factor by which node number increases from 0 to R level from" << endl;
        break;
    }
    *output << "PsiType\t\t" << config::PsiType << "\t# 0 - doubly occupied, 1 - SpinUp,SpinDown" << endl;
    // write out both types for easier changing afterwards
  //  switch (PsiType) {
  //    case 0:
        *output << "MaxPsiDouble\t" << config::MaxPsiDouble << "\t# here: specifying both maximum number of SpinUp- and -Down-states" << endl;
  //      break;
  //    case 1:
        *output << "PsiMaxNoUp\t" << config::PsiMaxNoUp << "\t# here: specifying maximum number of SpinUp-states" << endl;
        *output << "PsiMaxNoDown\t" << config::PsiMaxNoDown << "\t# here: specifying maximum number of SpinDown-states" << endl;
  //      break;
  //  }
    *output << "AddPsis\t\t" << config::AddPsis << "\t# Additional unoccupied Psis for bandgap determination" << endl;
    *output << endl;
    *output << "RCut\t\t" << config::RCut << "\t# R-cut for the ewald summation" << endl;
    *output << "StructOpt\t" << config::StructOpt << "\t# Do structure optimization beforehand" << endl;
    *output << "IsAngstroem\t" << config::IsAngstroem << "\t# 0 - Bohr, 1 - Angstroem" << endl;
    *output << "RelativeCoord\t" << config::RelativeCoord << "\t# whether ion coordinates are relative (1) or absolute (0)" << endl;
    *output << "MaxTypes\t" << mol->ElementCount <<  "\t# maximum number of different ion types" << endl;
    *output << endl;
    result = result && mol->Checkout(output);
    result = result && mol->Output(output);
    return result;
  } else
    return false;
};

/** Reads parameter from a parsed file.
 * The file is either parsed for a certain keyword or if null is given for
 * the value in row yth and column xth. If the keyword was necessity#critical,
 * then an error is thrown and the programme aborted.
 * \warning value is modified (both in contents and position)!
 * \param verbose 1 - print found value to stderr, 0 - don't
 * \param file file to be parsed
 * \param name Name of value in file (at least 3 chars!)
 * \param sequential 1 - do not reset file pointer to begin of file, 0 - set to beginning 
 *        (if file is sequentially parsed this can be way faster! However, beware of multiple values per line, as whole line is read -
 *         best approach: 0 0 0 1 (not resetted only on last value of line) - and of yth, which is now
 *         counted from this unresetted position!)
 * \param xth Which among a number of parameters it is (in grid case it's row number as grid is read as a whole!)
 * \param yth In grid case specifying column number, otherwise the yth \a name matching line
 * \param type Type of the Parameter to be read
 * \param value address of the value to be read (must have been allocated)
 * \param repetition determines, if the keyword appears multiply in the config file, which repetition shall be parsed, i.e. 1 if not multiply
 * \param critical necessity of this keyword being specified (optional, critical)
 * \return 1 - found, 0 - not found
 * \note Routine is taken from the pcp project and hack-a-slack adapted to C++
 */
int config::ParseForParameter(int verbose, ifstream *file, const char *name, int sequential, int const xth, int const yth, int type, void *value, int repetition, int critical) {
  int i,j;  // loop variables
  int length = 0, maxlength = -1;
  long file_position = file->tellg(); // mark current position
  char *dummy1, *dummy, *free_dummy;    // pointers in the line that is read in per step
  dummy1 = free_dummy = (char *) Malloc(256 * sizeof(char), "config::ParseForParameter: *free_dummy");

  //fprintf(stderr,"Parsing for %s\n",name);  
  if (repetition == 0)
    //Error(SomeError, "ParseForParameter(): argument repetition must not be 0!");
    return 0;

  int line = 0; // marks line where parameter was found
  int found = (type >= grid) ? 0 : (-yth + 1);  // marks if yth parameter name was found
  while((found != repetition)) {
    dummy1 = dummy = free_dummy;
    do {
      file->getline(dummy1, 256); // Read the whole line
      if (file->eof()) {
        if ((critical) && (found == 0)) {
          Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
          //Error(InitReading, name);
          fprintf(stderr,"Error:InitReading, critical %s not found\n", name);
          exit(255);
        } else {
          //if (!sequential)
          file->clear();
          file->seekg(file_position, ios::beg);  // rewind to start position
          Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");          
          return 0;
        }
      }
      line++;
    } while (((dummy1[0] == '#') || (dummy1[0] == '\n')) && dummy != NULL); // skip commentary and empty lines
    
    // C++ getline removes newline at end, thus re-add
    if ((dummy1 != NULL) && (strchr(dummy1,'\n') == NULL)) {
      i = strlen(dummy1);
      dummy1[i] = '\n';
      dummy1[i+1] = '\0';
    }
    //fprintf(stderr,"line ends at %i, newline at %i\n", strlen(dummy1), strchr(dummy1,'\n')-free_dummy);
    if (dummy1 == NULL) {
      if (verbose) fprintf(stderr,"Error reading line %i\n",line);
    } else {
      //fprintf(stderr,"Reading next line %i: %s\n", line, dummy1);
    }
    // Seek for possible end of keyword on line if given ...
    if (name != NULL) {
      dummy = strchr(dummy1,'\t');  // set dummy on first tab or space which ever's nearer
      if (dummy == NULL) {
        dummy = strchr(dummy1, ' ');  // if not found seek for space
        while ((dummy != NULL) && ((*dummy == '\t') || (*dummy == ' ')))    // skip some more tabs and spaces if necessary
          dummy++;
      }
      if (dummy == NULL) {
        dummy = strchr(dummy1, '\n'); // set on line end then (whole line = keyword)
        //fprintf(stderr,"Error: Cannot find tabs or spaces on line %i in search for %s\n", line, name);
        //Free((void **)&free_dummy);
        //Error(FileOpenParams, NULL);      
      } else {
        //fprintf(stderr,"found tab at %i\n",(char *)dummy-(char *)dummy1);
      }
    } else dummy = dummy1;
    // ... and check if it is the keyword!
    //fprintf(stderr,"name %p, dummy %i/%c, dummy1 %i/%c, strlen(name) %i\n", &name, dummy, *dummy, dummy1, *dummy1, strlen(name));
    if ((name == NULL) || ((dummy-dummy1 >= 3) && (strncmp(dummy1, name, strlen(name)) == 0)) && ((unsigned int)(dummy-dummy1) == strlen(name))) {
      found++; // found the parameter!
      //fprintf(stderr,"found %s at line %i between %i and %i\n", name, line, dummy1, dummy);    
      
      if (found == repetition) {
        for (i=0;i<xth;i++) { // i = rows
          if (type >= grid) {
            // grid structure means that grid starts on the next line, not right after keyword
            dummy1 = dummy = free_dummy;
            do {
              file->getline(dummy1, 256); // Read the whole line, skip commentary and empty ones
              if (file->eof()) {
                if ((critical) && (found == 0)) {
                  Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
                  //Error(InitReading, name);
                  fprintf(stderr,"Error:InitReading, critical %s not found\n", name);
                  exit(255);
                } else {
                  //if (!sequential)
                  file->clear();
                  file->seekg(file_position, ios::beg);  // rewind to start position
                  Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
                  return 0;
                }
              }
              line++;
            } while ((dummy1[0] == '#') || (dummy1[0] == '\n'));
            if (dummy1 == NULL){
              if (verbose) fprintf(stderr,"Error reading line %i\n", line);
            } else {
              //fprintf(stderr,"Reading next line %i: %s\n", line, dummy1);
            }
          } else { // simple int, strings or doubles start in the same line
            while ((*dummy == '\t') || (*dummy == ' '))   // skip interjacent tabs and spaces
              dummy++;
          }
          // C++ getline removes newline at end, thus re-add
          if ((dummy1 != NULL) && (strchr(dummy1,'\n') == NULL)) {
            j = strlen(dummy1);
            dummy1[j] = '\n';
            dummy1[j+1] = '\0';
          }
  
          int start = (type >= grid) ? 0 : yth-1 ;
          for (j=start;j<yth;j++) { // j = columns
            // check for lower triangular area and upper triangular area
            if ( ((i > j) && (type == upper_trigrid)) || ((j > i) && (type == lower_trigrid))) {
              *((double *)value) = 0.0;
              fprintf(stderr,"%f\t",*((double *)value));
              value = (void *)((long)value + sizeof(double));
              //value += sizeof(double);
            } else {
              // otherwise we must skip all interjacent tabs and spaces and find next value
              dummy1 = dummy;
              dummy = strchr(dummy1, '\t'); // seek for tab or space
              if (dummy == NULL) {
                dummy = strchr(dummy1, ' ');  // if not found seek for space
                while ((dummy != NULL) && ((*dummy == '\t') || (*dummy == ' ')))    // skip some more tabs and spaces if necessary
                  dummy++;
              }
/*              while ((dummy != NULL) && ((*dummy == '\t') || (*dummy == ' ')))    // skip some more tabs and spaces if necessary
                dummy++;*/
              if (dummy == NULL) { // if still zero returned ...
                dummy = strchr(dummy1, '\n');  // ... at line end then
                if ((j < yth-1) && (type < 4)) {  // check if xth value or not yet
                  if (critical) {
                    if (verbose) fprintf(stderr,"Error: EoL at %i and still missing %i value(s) for parameter %s\n", line, yth-j, name);
                    Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
                    //return 0;
                    exit(255);
                    //Error(FileOpenParams, NULL);      
                  } else {
                    //if (!sequential)
                    file->clear();
                    file->seekg(file_position, ios::beg);  // rewind to start position
                    Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
                    return 0;
                  }
                }
              } else {
                //fprintf(stderr,"found tab at %i\n",(char *)dummy-(char *)free_dummy);
              }
              //fprintf(stderr,"value from %i to %i\n",(char *)dummy1-(char *)free_dummy,(char *)dummy-(char *)free_dummy);
              switch(type) {
                case (row_int):
                  *((int *)value) = atoi(dummy1);
                  if ((verbose) && (i==0) && (j==0)) fprintf(stderr,"%s = ", name);
                  if (verbose) fprintf(stderr,"%i\t",*((int *)value));
                    value = (void *)((long)value + sizeof(int));
                    //value += sizeof(int);
                  break;
                case(row_double): 
                case(grid):
                case(lower_trigrid):
                case(upper_trigrid):
                  *((double *)value) = atof(dummy1);
                  if ((verbose) && (i==0) && (j==0)) fprintf(stderr,"%s = ", name);
                  if (verbose) fprintf(stderr,"%lg\t",*((double *)value));
                  value = (void *)((long)value + sizeof(double));
                  //value += sizeof(double);
                  break;
                case(double_type):
                  *((double *)value) = atof(dummy1);
                  if ((verbose) && (i == xth-1)) fprintf(stderr,"%s = %lg\n", name, *((double *) value));
                  //value += sizeof(double);
                  break;
                case(int_type):
                  *((int *)value) = atoi(dummy1);
                  if ((verbose) && (i == xth-1)) fprintf(stderr,"%s = %i\n", name, *((int *) value));
                  //value += sizeof(int);
                  break;
                default:
                case(string_type):
                  if (value != NULL) {
                    //if (maxlength == -1) maxlength = strlen((char *)value); // get maximum size of string array
                    maxlength = MAXSTRINGSIZE;
                    length = maxlength > (dummy-dummy1) ? (dummy-dummy1) : maxlength; // cap at maximum
                    strncpy((char *)value, dummy1, length);  // copy as much
                    ((char *)value)[length] = '\0';  // and set end marker
                    if ((verbose) && (i == xth-1)) fprintf(stderr,"%s is '%s' (%i chars)\n",name,((char *) value), length);
                    //value += sizeof(char);
                  } else {
                  }
                break;
              }
            }
            while (*dummy == '\t')
              dummy++;
          }
        }
      }
    }
  } 
  if ((type >= row_int) && (verbose)) fprintf(stderr,"\n");
  Free((void **)&free_dummy, "config::ParseForParameter: *free_dummy");
  if (!sequential) {
    file->clear();
    file->seekg(file_position, ios::beg);  // rewind to start position
  }
  //fprintf(stderr, "End of Parsing\n\n");
  
  return (found); // true if found, false if not
}