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[tortoisegit/TortoiseGitJp.git] / 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