src/TortoiseShell/PreserveChdir.cpp

   1 // TortoiseSVN - a Windows shell extension for easy version control\r
   2 \r
   3 // Copyright (C) 2003-2007 - TortoiseSVN\r
   4 \r
   5 // This program is free software; you can redistribute it and/or\r
   6 // modify it under the terms of the GNU General Public License\r
   7 // as published by the Free Software Foundation; either version 2\r
   8 // of the License, or (at your option) any later version.\r
   9 \r
  10 // This program is distributed in the hope that it will be useful,\r
  11 // but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  13 // GNU General Public License for more details.\r
  14 \r
  15 // You should have received a copy of the GNU General Public License\r
  16 // along with this program; if not, write to the Free Software Foundation,\r
  17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.\r
  18 //\r
  19 #include "stdafx.h"\r
  20 #include "PreserveChdir.h"\r
  21 \r
  22 PreserveChdir::PreserveChdir()\r
  23 {\r
  24         DWORD len = GetCurrentDirectory(0, NULL);\r
  25         if (len)\r
  26         {\r
  27                 originalCurrentDirectory = new TCHAR[len];\r
  28                 if (GetCurrentDirectory(len, originalCurrentDirectory)==0)\r
  29                 {\r
  30                         delete [] originalCurrentDirectory;\r
  31                         originalCurrentDirectory = NULL;\r
  32                 }\r
  33         }\r
  34         else\r
  35                 originalCurrentDirectory = NULL;\r
  36 }\r
  37 \r
  38 PreserveChdir::~PreserveChdir()\r
  39 {\r
  40         if (originalCurrentDirectory)\r
  41         {\r
  42                 DWORD len = GetCurrentDirectory(0, NULL);\r
  43                 TCHAR * currentDirectory = new TCHAR[len];\r
  44 \r
  45                 // _tchdir is an expensive function - don't call it unless we really have to\r
  46                 GetCurrentDirectory(len, currentDirectory);\r
  47                 if(_tcscmp(currentDirectory, originalCurrentDirectory) != 0)\r
  48                 {\r
  49                         SetCurrentDirectory(originalCurrentDirectory);\r
  50                 }\r
  51                 delete [] currentDirectory;\r
  52                 delete [] originalCurrentDirectory;\r
  53                 originalCurrentDirectory = NULL;\r
  54         }\r
  55 }\r