Line data    Source code

       1             : /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
       2             :    Copyright (c) 2012-2020 The plumed team
       3             :    (see the PEOPLE file at the root of the distribution for a list of names)
       4             : 
       5             :    See http://www.plumed.org for more information.
       6             : 
       7             :    This file is part of plumed, version 2.
       8             : 
       9             :    plumed is free software: you can redistribute it and/or modify
      10             :    it under the terms of the GNU Lesser General Public License as published by
      11             :    the Free Software Foundation, either version 3 of the License, or
      12             :    (at your option) any later version.
      13             : 
      14             :    plumed is distributed in the hope that it will be useful,
      15             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
      16             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      17             :    GNU Lesser General Public License for more details.
      18             : 
      19             :    You should have received a copy of the GNU Lesser General Public License
      20             :    along with plumed.  If not, see <http://www.gnu.org/licenses/>.
      21             : +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
      22             : #ifndef __PLUMED_tools_IFile_h
      23             : #define __PLUMED_tools_IFile_h
      24             : 
      25             : #include "FileBase.h"
      26             : #include <vector>
      27             : 
      28             : namespace PLMD {
      29             : 
      30             : class Value;
      31             : 
      32             : /**
      33             : \ingroup TOOLBOX
      34             : Class for input files
      35             : 
      36             : This class provides features similar to those in the standard C "FILE*" type,
      37             : but only for sequential input. See OFile for sequential output.
      38             : 
      39             : */
      40             : class IFile:
      41             : /// Class identifying a single field for fielded output
      42             :   public virtual FileBase {
      43       25458 :   class Field:
      44             :     public FieldBase {
      45             :   public:
      46             :     bool read;
      47       11600 :     Field(): read(false) {}
      48             :   };
      49             : /// Low-level read.
      50             : /// Note: in parallel, all processes read
      51             :   size_t llread(char*,size_t);
      52             : /// All the defined fields
      53             :   std::vector<Field> fields;
      54             : /// Flag set in the middle of a field reading
      55             :   bool inMiddleOfField;
      56             : /// Set to true if you want to allow fields to be ignored in the read in file
      57             :   bool ignoreFields;
      58             : /// Set to true to allow files without end-of-line at the end
      59             :   bool noEOL;
      60             : /// Advance to next field (= read one line)
      61             :   IFile& advanceField();
      62             : /// Find field index by name
      63             :   unsigned findField(const std::string&name)const;
      64             : public:
      65             : /// Constructor
      66             :   IFile();
      67             : /// Destructor
      68             :   ~IFile();
      69             : /// Opens the file
      70           0 :   IFile& open(const std::string&name);
      71             : /// Gets the list of all fields
      72             :   IFile& scanFieldList(std::vector<std::string>&);
      73             : /// Read a double field
      74             :   IFile& scanField(const std::string&,double&);
      75             : /// Read a int field
      76             :   IFile& scanField(const std::string&,int&);
      77             : /// Read a string field
      78             :   IFile& scanField(const std::string&,std::string&);
      79             :   /**
      80             :    Ends a field-formatted line.
      81             : 
      82             :   Typically used as
      83             :   \verbatim
      84             :     if.scanField("a",a).scanField("b",b).scanField();
      85             :   \endverbatim
      86             :   */
      87             :   IFile& scanField();
      88             : /// Get a full line as a string
      89             :   IFile& getline(std::string&);
      90             : /// Reset end of file
      91             :   void reset(bool);
      92             : /// Check if a field exist
      93             :   bool FieldExist(const std::string& s);
      94             : /// Read in a value
      95             :   IFile& scanField(Value* val);
      96             : /// Allow some of the fields in the input to be ignored
      97             :   void allowIgnoredFields();
      98             : /// Allow files without EOL at the end.
      99             : /// This in practice should be only used when opening
     100             : /// plumed input files
     101             :   void allowNoEOL();
     102             : };
     103             : 
     104             : }
     105             : 
     106             : #endif