Geant4 Cross Reference |
1 // 2 // ******************************************************************** 3 // * License and Disclaimer * 4 // * * 5 // * The Geant4 software is copyright of the Copyright Holders of * 6 // * the Geant4 Collaboration. It is provided under the terms and * 7 // * conditions of the Geant4 Software License, included in the file * 8 // * LICENSE and available at http://cern.ch/geant4/license . These * 9 // * include a list of copyright holders. * 10 // * * 11 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file LICENSE and URL above * 16 // * for the full disclaimer and the limitation of liability. * 17 // * * 18 // * This code implementation is the result of the scientific and * 19 // * technical work of the GEANT4 collaboration. * 20 // * By using, copying, modifying or distributing the software (or * 21 // * any work based on the software) you agree to acknowledge its * 22 // * use in resulting scientific publications, and indicate your * 23 // * acceptance of all terms of the Geant4 Software license. * 24 // ******************************************************************** 25 // 26 // John Allison 1st October 2012 27 28 // Utility moved from G4DimensionedType.hh. 29 30 #include "G4DimensionedType.hh" 31 32 namespace G4DimensionedTypeUtils 33 { 34 // Helper class 35 class HasName{ 36 public: 37 HasName(const G4String& name): fName(name) {}; 38 bool operator()(const G4UnitDefinition* value) const 39 { 40 return ((value->GetName() == fName) || (value->GetSymbol() == fName)); 41 } 42 private: 43 G4String fName; 44 }; 45 46 // Get unit value from input string. Return value indicates if 47 // conversion was successful. 48 G4bool GetUnitValue(const G4String& unit, G4double& value) 49 { 50 // Get units table 51 G4UnitsTable& unitTable = G4UnitDefinition::GetUnitsTable(); 52 if (unitTable.empty()) G4UnitDefinition::BuildUnitsTable(); 53 54 // Iterate over unit lists, searching for unit match 55 auto iterTable = unitTable.begin(); 56 57 HasName myUnit(unit); 58 G4bool gotUnit(false); 59 60 while (!gotUnit && (iterTable != unitTable.end())) { 61 G4UnitsContainer unitContainer = (*iterTable)->GetUnitsList(); 62 63 auto iterUnits = 64 std::find_if(unitContainer.begin(), unitContainer.end(), myUnit); 65 66 if (iterUnits != unitContainer.end()) { 67 value = (*iterUnits)->GetValue(); 68 gotUnit = true; 69 } 70 71 iterTable++; 72 } 73 74 return gotUnit; 75 } 76 } 77 78