Line data    Source code

       1             : /* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
       2             :    Copyright (c) 2012-2023 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             : #include <cstddef>
      28             : 
      29             : namespace PLMD {
      30             : 
      31             : class Value;
      32             : 
      33             : /**
      34             : \ingroup TOOLBOX
      35             : Class for input files
      36             : 
      37             : This class provides features similar to those in the standard C "FILE*" type,
      38             : but only for sequential input. See OFile for sequential output.
      39             : 
      40             : */
      41             : class IFile:
      42             : /// Class identifying a single field for fielded output
      43             :   public virtual FileBase {
      44       26057 :   class Field:
      45             :     public FieldBase {
      46             :   public:
      47             :     bool read;
      48        7253 :     Field(): read(false) {}
      49             :   };
      50             : /// Low-level read.
      51             : /// Note: in parallel, all processes read
      52             :   std::size_t llread(char*,std::size_t);
      53             : /// All the defined fields
      54             :   std::vector<Field> fields;
      55             : /// Flag set in the middle of a field reading
      56             :   bool inMiddleOfField;
      57             : /// Set to true if you want to allow fields to be ignored in the read in file
      58             :   bool ignoreFields;
      59             : /// Set to true to allow files without end-of-line at the end
      60             :   bool noEOL;
      61             : /// Advance to next field (= read one line)
      62             :   IFile& advanceField();
      63             : /// Find field index by name
      64             :   unsigned findField(const std::string&name)const;
      65             : public:
      66             : /// Constructor
      67             :   IFile();
      68             : /// Destructor
      69             :   ~IFile();
      70             : /// Opens the file
      71             :   IFile& open(const std::string&name) override;
      72             : /// Gets the list of all fields
      73             :   IFile& scanFieldList(std::vector<std::string>&);
      74             : /// Read a double field
      75             :   IFile& scanField(const std::string&,double&);
      76             : /// Read a int field
      77             :   IFile& scanField(const std::string&,int&);
      78             : /// Read a long int field
      79             :   IFile& scanField(const std::string&,long int&);
      80             : /// Read a unsigned field
      81             :   IFile& scanField(const std::string&,unsigned&);
      82             : /// Read a long unsigned field
      83             :   IFile& scanField(const std::string&,long unsigned&);
      84             : /// Read a string field
      85             :   IFile& scanField(const std::string&,std::string&);
      86             :   /**
      87             :    Ends a field-formatted line.
      88             : 
      89             :   Typically used as
      90             :   \verbatim
      91             :     if.scanField("a",a).scanField("b",b).scanField();
      92             :   \endverbatim
      93             :   */
      94             :   IFile& scanField();
      95             : /// Get a full line as a string
      96             :   IFile& getline(std::string&);
      97             : /// Reset end of file
      98             :   void reset(bool);
      99             : /// Check if a field exist
     100             :   bool FieldExist(const std::string& s);
     101             : /// Read in a value
     102             :   IFile& scanField(Value* val);
     103             : /// Allow some of the fields in the input to be ignored
     104             :   void allowIgnoredFields();
     105             : /// Allow files without EOL at the end.
     106             : /// This in practice should be only used when opening
     107             : /// plumed input files
     108             :   void allowNoEOL();
     109             : };
     110             : 
     111             : }
     112             : 
     113             : #endif