src/DepTable.h

   1 // -*- C++ -*-
   2 /**
   3  * \file DepTable.h
   4  * This file is part of LyX, the document processor.
   5  * Licence details can be found in the file COPYING.
   6  *
   7  * \author Lars Gullik Bjønnes
   8  * \author Jean-Marc Lasgouttes
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #ifndef DEP_TABLE_H
  14 #define DEP_TABLE_H
  15
  16 #include <map>
  17 #include <string>
  18
  19 ///
  20 class DepTable {
  21 public:
  22         /** This one is a little bit harder since we need the absolute
  23           filename. Should we insert files with .sty .cls etc as
  24           extension? */
  25         void insert(std::string const & f, bool upd = false);
  26         ///
  27         void update();
  28
  29         ///
  30         void write(std::string const & f) const;
  31         /// returns true if dep file was read successfully
  32         bool read(std::string const & f);
  33         /// returns true if any of the files has changed
  34         bool sumchange() const;
  35         /// return true if fil has changed.
  36         bool haschanged(std::string const & fil) const;
  37         /// return true if a file with extension ext has changed.
  38         bool extchanged(std::string const & ext) const;
  39         ///
  40         bool exist(std::string const & fil) const;
  41         /// returns true if any files with ext exist
  42         bool ext_exist(std::string const & ext) const;
  43         ///
  44         void remove_files_with_extension(std::string const &);
  45         ///
  46         void remove_file(std::string const &);
  47 private:
  48         ///
  49         struct dep_info {
  50                 /// Previously calculated CRC value
  51                 unsigned long crc_prev;
  52                 /// Current CRC value - only re-computed if mtime has changed.
  53                 unsigned long crc_cur;
  54                 /// mtime from last time current CRC was calculated.
  55                 long mtime_cur;
  56                 ///
  57                 bool changed() const;
  58         };
  59         ///
  60         typedef std::map<std::string, dep_info> DepList;
  61         ///
  62         DepList deplist;
  63 };
  64
  65 #endif