src/support/path.h

   1 // -*- C++ -*-
   2 #ifndef PATH_H
   3 #define PATH_H
   4
   5 #include "LString.h"
   6 #include "support/filetools.h"
   7 #include "lyxlib.h"
   8
   9 #ifdef __GNUG__
  10 #pragma interface
  11 #endif
  12
  13 ///
  14 class Path {
  15 public:
  16         ///
  17         explicit
  18         Path(string const & path)
  19                 : popped_(false)
  20         {
  21                 if (!path.empty()) {
  22                         pushedDir_ = GetCWD();
  23                         if (pushedDir_.empty() || lyx::chdir(path.c_str())) {
  24                                 // should throw an exception
  25                                 // throw DirChangeError();
  26                                 // The use of WriteFSAlert makes this
  27                                 // impossible to inline.
  28                                 //WriteFSAlert(_("Error: Could not change to directory: "),
  29                                 //           path);
  30                         }
  31                 } else {
  32                         popped_ = true;
  33                 }
  34         }
  35         ///
  36         ~Path()
  37         {
  38                 if (!popped_) pop();
  39         }
  40         ///
  41         int pop();
  42 private:
  43         ///
  44         bool popped_;
  45         ///
  46         string pushedDir_;
  47 };
  48
  49 // To avoid the wrong usage:
  50 // Path("/tmp");   // wrong
  51 // Path p("/tmp");  // right
  52 // we add this macro:
  53 #define Path(x) unnamed_Path;
  54 // Tip gotten from Bobby Schmidt's column in C/C++ Users Journal
  55
  56 #endif