G4LatticeReader.cc

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/// \file processes/phonon/include/G4LatticeReader.hh
/// \brief Implementation of the G4LatticeReader class
//
// NOTE:  This reader class for logical lattices should be moved to
//    materials/ after the 10.0 release (and this comment removed).
// $Id: G4LatticeReader.cc 76885 2013-11-18 12:55:15Z gcosmo $
//
// 20131106  M.Kelsey -- Add const to getenv() to avoid compiler warning.
// 20131112  Throw exception if input file fails.
// 20131115  Check file input arguments for maps for validity before use;
//      move ctor, dtor here; check stream pointer before closing.

#include "G4LatticeReader.hh"
#include "G4ExceptionSeverity.hh"
#include "G4LatticeLogical.hh"
#include "G4SystemOfUnits.hh"
#include <fstream>
#include <limits>
#include <stdlib.h>


// Default path to lattice files, for use with filenames below

const G4String G4LatticeReader::fDataDir =
  getenv("G4LATTICEDATA") ? (const char*)getenv("G4LATTICEDATA") : "./CrystalMaps";


// Constructor and destructor

G4LatticeReader::G4LatticeReader(G4int vb)
  : verboseLevel(vb), psLatfile(0), pLattice(0), fMapPath(""),
    fToken(""), fValue(0.), fMap(""), fsPol(""), fPol(-1), fNX(0), fNY(0) {;}

G4LatticeReader::~G4LatticeReader() {
  delete psLatfile; psLatfile = 0;
}


// Main drivers to read configuration from file or stream

G4LatticeLogical* G4LatticeReader::MakeLattice(const G4String& filename) {
  if (verboseLevel) G4cout << "G4LatticeReader " << filename << G4endl;

  if (!OpenFile(filename)) {
    G4ExceptionDescription msg;
    msg << "Unable to open " << filename;
    G4Exception("G4LatticeReader::MakeLattice", "Lattice001",
        FatalException, msg);
    return 0;
  }

  pLattice = new G4LatticeLogical;  // Create lattice to be filled

  G4bool goodLattice = true;
  while (!psLatfile->eof()) {
    goodLattice &= ProcessToken();
  }
  CloseFile();

  if (!goodLattice) {
    G4ExceptionDescription msg;
    msg << "Error reading lattice from " << filename;
    G4Exception("G4LatticeReader::MakeLattice", "Lattice002",
        FatalException, msg);
    delete pLattice;
    pLattice = 0;
  }

  return pLattice;  // Lattice complete; return pointer with ownership
}


// Open local file or file found under data path

G4bool G4LatticeReader::OpenFile(const G4String& filename) {
  if (verboseLevel)
    G4cout << "G4LatticeReader::OpenFile " << filename << G4endl;

  G4String filepath = filename;
  psLatfile = new std::ifstream(filepath);
  if (!psLatfile->good()) {         // Local file not found
    filepath = fDataDir + "/" + filename;
    psLatfile->open(filepath);          // Try data directory
    if (!psLatfile->good()) {
      CloseFile();
      return false;
    }
    if (verboseLevel>1) G4cout << " Found file " << filepath << G4endl;
  }

  // Extract path from filename to use in finding .ssv map files
  size_t lastdir = filepath.last('/');
  if (lastdir == std::string::npos) fMapPath = "."; // No path at all
  else fMapPath = filepath(0,lastdir);

  return true;
}

// Close and delete input stream

void G4LatticeReader::CloseFile() {
  if (psLatfile) psLatfile->close();
  delete psLatfile;
  psLatfile = 0;
}


// Read next token from file, use it to store next data into lattice

G4bool G4LatticeReader::ProcessToken() {
  fToken = "";
  *psLatfile >> fToken;
  if (fToken.empty() || psLatfile->eof()) return true;  // End of file reached

  if (verboseLevel>1) G4cout << " ProcessToken " << fToken << G4endl;

  fToken.toLower();
  if (fToken.contains('#')) return SkipComments();  // Ignore rest of line
  if (fToken == "vdir")     return ProcessNMap();   // Direction vector map
  if (fToken == "vg")       return ProcessMap();    // Velocity magnitudes
  if (fToken == "dyn")      return ProcessConstants();  // Dynamical parameters
  return ProcessValue(fToken);              // Single numeric value
}

// Eat remainder of line, assuming a '#' token was found

G4bool G4LatticeReader::SkipComments() {
  psLatfile->ignore(std::numeric_limits<std::streamsize>::max(), '\n');
  return true;      // Never fails
}

// Read double value from file, store based on name string

G4bool G4LatticeReader::ProcessValue(const G4String& name) {
  *psLatfile >> fValue;
  if (verboseLevel>1) G4cout << " ProcessValue " << fValue << G4endl;

  G4bool good = true;
  /***** NOTE: Individual Set functions not included in Release 10.0
       if (name == "beta")   pLattice->SetBeta(fValue);
  else if (name == "gamma")  pLattice->SetGamma(fValue);
  else if (name == "lambda") pLattice->SetLambda(fValue);
  else if (name == "mu")     pLattice->SetMu(fValue);
  else *****/
       if (name == "scat")   pLattice->SetScatteringConstant(fValue*s*s*s);
  else if (name == "b")      pLattice->SetScatteringConstant(fValue*s*s*s);
  else if (name == "decay")  pLattice->SetAnhDecConstant(fValue*s*s*s*s);
  else if (name == "a")      pLattice->SetAnhDecConstant(fValue*s*s*s*s);
  else if (name == "ldos")   pLattice->SetLDOS(fValue);
  else if (name == "stdos")  pLattice->SetSTDOS(fValue);
  else if (name == "ftdos")  pLattice->SetFTDOS(fValue);
  else {
    G4cerr << "G4LatticeReader: Unrecognized token " << name << G4endl;
    good = false;
  }

  return good;
}

G4bool G4LatticeReader::ProcessConstants() {
  G4double beta=0., gamma=0., lambda=0., mu=0.;
  *psLatfile >> beta >> gamma >> lambda >> mu;
  if (verboseLevel>1)
    G4cout << " ProcessConstants " << beta << " " << gamma
       << " " << lambda << " " << mu << G4endl;

  pLattice->SetDynamicalConstants(beta, gamma, lambda, mu);
  return psLatfile->good();
}

// Read map filename, polarization, and binning dimensions 

G4bool G4LatticeReader::ReadMapInfo() {
  *psLatfile >> fMap >> fsPol >> fNX >> fNY;
  if (verboseLevel>1)
    G4cout << " ReadMapInfo " << fMap << " " << fsPol
       << " " << fNX << " " << fNY << G4endl;

  if (fNX < 0 || fNX >= G4LatticeLogical::MAXRES) {
    G4cerr << "G4LatticeReader: Invalid map theta dimension " << fNX << G4endl;
    return false;
  }

  if (fNY < 0 || fNY >= G4LatticeLogical::MAXRES) {
    G4cerr << "G4LatticeReader: Invalid map phi dimension " << fNY << G4endl;
    return false;
  }

  // Prepend path to data files to map filename
  fMap = fMapPath + "/" + fMap;

  // Convert string code (L,ST,LT) to polarization index
  fsPol.toLower();
  fPol = ( (fsPol=="l")  ? 0 :      // Longitudinal
       (fsPol=="st") ? 1 :      // Slow-transverse
       (fsPol=="ft") ? 2 :      // Fast-transverse
       -1 );            // Invalid code

  if (fPol<0 || fPol>2) {
    G4cerr << "G4LatticeReader: Invalid polarization code " << fsPol << G4endl;
    return false;
  }

  return true;
}

G4bool G4LatticeReader::ProcessMap() {
  if (!ReadMapInfo()) {     // Get specific parameters for map to load
    G4cerr << "G4LatticeReader: Unable to process mapfile directive." << G4endl;
    return false;
  }

  return pLattice->LoadMap(fNX, fNY, fPol, fMap);
}

G4bool G4LatticeReader::ProcessNMap() {
  if (!ReadMapInfo()) {     // Get specific parameters for map to load
    G4cerr << "G4LatticeReader: Unable to process mapfile directive." << G4endl;
    return false;
  }

  return pLattice->Load_NMap(fNX, fNY, fPol, fMap);
}