src/DepTable.h

   1 // -*- C++ -*-
   2 /* This file is part of
   3  * ======================================================
   4  *
   5  *           LyX, The Document Processor
   6  *           Copyright 1995 Matthias Ettrich
   7  *           Copyright 1995-2001 The LyX Team.
   8  *
   9  *           This file is Copyright 1996-2001
  10  *           Lars Gullik Bjønnes
  11  *           Ben Stanley
  12  *
  13  * ======================================================
  14  */
  15
  16 #ifndef DEP_TABLE_H
  17 #define DEP_TABLE_H
  18
  19 #include "LString.h"
  20 #include <map>
  21
  22 ///
  23 class DepTable {
  24 public:
  25         /** This one is a little bit harder since we need the absolute
  26           filename. Should we insert files with .sty .cls etc as
  27           extension? */
  28         void insert(string const & f, bool upd = false);
  29         ///
  30         void update();
  31
  32         ///
  33         void write(string const & f) const;
  34         /// returns true if dep file was read successfully
  35         bool read(string const & f);
  36         /// returns true if any of the files has changed
  37         bool sumchange() const;
  38         /// return true if fil has changed.
  39         bool haschanged(string const & fil) const;
  40         /// return true if a file with extension ext has changed.
  41         bool extchanged(string const & ext) const;
  42         ///
  43         bool exist(string const & fil) const;
  44         /// returns true if any files with ext exist
  45         bool ext_exist(string const & ext) const;
  46         ///
  47         void remove_files_with_extension(string const &);
  48         ///
  49         void remove_file(string const &);
  50 private:
  51         ///
  52         struct dep_info {
  53                 /// Previously calculated CRC value
  54                 unsigned long crc_prev;
  55                 /// Current CRC value - only re-computed if mtime has changed.
  56                 unsigned long crc_cur;
  57                 /// mtime from last time current CRC was calculated.
  58                 long mtime_cur;
  59                 ///
  60                 bool changed() const;
  61         };
  62         ///
  63         typedef std::map<string, dep_info> DepList;
  64         ///
  65         DepList deplist;
  66 };
  67
  68 #endif