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/indra/llvfs/lldirguard.h

https://bitbucket.org/lindenlab/viewer-beta/
C++ Header | 72 lines | 39 code | 7 blank | 26 comment | 1 complexity | 41528a3353625b1e1c1cadbca2ce8707 MD5 | raw file
 1/** 
 2 * @file lldirguard.h
 3 * @brief Protect working directory from being changed in scope.
 4 *
 5 * $LicenseInfo:firstyear=2009&license=viewerlgpl$
 6 * Second Life Viewer Source Code
 7 * Copyright (C) 2010, Linden Research, Inc.
 8 * 
 9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation;
12 * version 2.1 of the License only.
13 * 
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * Lesser General Public License for more details.
18 * 
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with this library; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
22 * 
23 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
24 * $/LicenseInfo$
25 */
26
27#ifndef LL_DIRGUARD_H
28#define LL_DIRGUARD_H
29
30#include "linden_common.h"
31#include "llerror.h"
32
33#if LL_WINDOWS
34class LLDirectoryGuard
35{
36public:
37	LLDirectoryGuard()
38	{
39		mOrigDirLen = GetCurrentDirectory(MAX_PATH, mOrigDir);
40	}
41
42	~LLDirectoryGuard()
43	{
44		mFinalDirLen = GetCurrentDirectory(MAX_PATH, mFinalDir);
45		if ((mOrigDirLen!=mFinalDirLen) ||
46			(wcsncmp(mOrigDir,mFinalDir,mOrigDirLen)!=0))
47		{
48			// Dir has changed
49			std::string mOrigDirUtf8 = utf16str_to_utf8str(llutf16string(mOrigDir));
50			std::string mFinalDirUtf8 = utf16str_to_utf8str(llutf16string(mFinalDir));
51			llinfos << "Resetting working dir from " << mFinalDirUtf8 << " to " << mOrigDirUtf8 << llendl;
52			SetCurrentDirectory(mOrigDir);
53		}
54	}
55
56private:
57	TCHAR mOrigDir[MAX_PATH];
58	DWORD mOrigDirLen;
59	TCHAR mFinalDir[MAX_PATH];
60	DWORD mFinalDirLen;
61};
62#else // No-op outside Windows.
63class LLDirectoryGuard
64{
65public:
66	LLDirectoryGuard() {}
67	~LLDirectoryGuard() {}
68};
69#endif 
70
71
72#endif