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_FileBase_h
      23             : #define __PLUMED_tools_FileBase_h
      24             : 
      25             : #include <string>
      26             : 
      27             : namespace PLMD {
      28             : 
      29             : class Communicator;
      30             : class PlumedMain;
      31             : class Action;
      32             : 
      33             : /**
      34             : Base class for dealing with files.
      35             : 
      36             : This class just provides things which are common among OFile and IFile
      37             : */
      38             : 
      39             : class FileBase {
      40             : /// Copy constructor is disabled
      41             :   FileBase(const FileBase&) = delete;
      42             : /// Assignment operator is disabled
      43             :   FileBase& operator=(const FileBase&) = delete;
      44             : protected:
      45             : /// Internal tool.
      46             : /// Base for IFile::Field and OFile::Field
      47    18146275 :   class FieldBase {
      48             : // everything is public to simplify usage
      49             :   public:
      50             :     std::string name;
      51             :     std::string value;
      52             :     bool constant;
      53    16856872 :     FieldBase(): constant(false) {}
      54             :   };
      55             : 
      56             : /// file pointer
      57             :   FILE* fp;
      58             : /// zip file pointer.
      59             :   void* gzfp;
      60             : /// communicator. NULL if not set
      61             :   Communicator* comm;
      62             : /// pointer to main plumed object. NULL if not linked
      63             :   PlumedMain* plumed;
      64             : /// pointer to corresponding action. NULL if not linked
      65             :   Action* action;
      66             : /// Control closing on destructor.
      67             : /// If true, file will not be closed in destructor
      68             :   bool cloned;
      69             : /// Private constructor.
      70             : /// In this manner one cannot instantiate a FileBase object
      71             :   FileBase();
      72             : /// Set to true when end of file is encountered
      73             :   bool eof;
      74             : /// Set to true when error is encountered
      75             :   bool err;
      76             : /// path of the opened file
      77             :   std::string path;
      78             : /// mode of the opened file
      79             :   std::string mode;
      80             : /// Set to true if you want flush to be heavy (close/reopen)
      81             :   bool heavyFlush;
      82             : public:
      83             : /// Append suffix.
      84             : /// It appends the desired suffix to the string. Notice that
      85             : /// it conserves some suffix (e.g. gz/xtc/trr).
      86             :   static std::string appendSuffix(const std::string&path,const std::string&suffix);
      87             : private:
      88             : /// Enforced suffix:
      89             :   std::string enforcedSuffix;
      90             : /// If true, use enforcedSuffix, else get it from PlumedMain
      91             :   bool enforcedSuffix_;
      92             : public:
      93             : /// Link to an already open filed
      94             :   FileBase& link(FILE*);
      95             : /// Link to a PlumedMain object
      96             : /// Automatically links also the corresponding Communicator.
      97             :   FileBase& link(PlumedMain&);
      98             : /// Link to a Communicator object
      99             :   FileBase& link(Communicator&);
     100             : /// Link to an Action object.
     101             : /// Automatically links also the corresponding PlumedMain and Communicator.
     102             :   FileBase& link(Action&);
     103             : /// Enforce suffix.
     104             : /// Overrides the one set in PlumedMain&
     105             :   FileBase& enforceSuffix(const std::string&suffix);
     106             : /// Flushes the file to disk
     107             :   virtual FileBase& flush();
     108             : /// Closes the file
     109             : /// Should be used only for explicitely opened files.
     110             :   void        close();
     111             : /// Virtual destructor (allows inheritance)
     112             :   virtual ~FileBase();
     113             : /// Check for error/eof.
     114             :   operator bool () const;
     115             : /// Set heavyFlush flag
     116         635 :   void setHeavyFlush() { heavyFlush=true;}
     117             : /// Opens the file
     118             :   virtual FileBase& open(const std::string&name)=0;
     119             : /// Check if the file exists
     120             :   bool FileExist(const std::string& path);
     121             : /// Check if a file is open
     122             :   bool isOpen();
     123             : /// Retrieve the path
     124             :   std::string getPath()const;
     125             : /// Retrieve the mode
     126             :   std::string getMode()const;
     127             : /// Get the file suffix
     128             :   std::string getSuffix()const;
     129             : /// Get the underlying file pointer.
     130             : /// It might be null even if the file is open, e.g. when the file
     131             : /// was open as a gzipped file.
     132             :   FILE* getFILE()const;
     133             : };
     134             : 
     135             : inline
     136             : std::string FileBase::getPath()const {
     137         871 :   return path;
     138             : }
     139             : 
     140             : inline
     141             : std::string FileBase::getMode()const {
     142         220 :   return mode;
     143             : }
     144             : 
     145             : inline
     146             : FILE* FileBase::getFILE()const {
     147          18 :   return fp;
     148             : }
     149             : 
     150             : }
     151             : 
     152             : #endif