pjs/xpcom/base/nsSetDllDirectory.h

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3.2 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Ehsan Akhgari <ehsan@mozilla.com> (Original Author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsSetDllDirectory_h
#define nsSetDllDirectory_h
#ifndef XP_WIN
#error This file only makes sense on Windows.
#endif
#include <windows.h>
#include <nscore.h>
#include <stdlib.h>
namespace mozilla {
static void SanitizeEnvironmentVariables()
{
DWORD bufferSize = GetEnvironmentVariableW(L"PATH", NULL, 0);
if (bufferSize) {
wchar_t* originalPath = new wchar_t[bufferSize];
if (bufferSize - 1 == GetEnvironmentVariableW(L"PATH", originalPath, bufferSize)) {
bufferSize = ExpandEnvironmentStringsW(originalPath, NULL, 0);
if (bufferSize) {
wchar_t* newPath = new wchar_t[bufferSize];
if (ExpandEnvironmentStringsW(originalPath,
newPath,
bufferSize)) {
SetEnvironmentVariableW(L"PATH", newPath);
}
delete[] newPath;
}
}
delete[] originalPath;
}
}
// Sets the directory from which DLLs can be loaded if the SetDllDirectory OS
// API is available.
// You must call SanitizeEnvironmentVariables before this function when calling
// it the first time.
static inline void NS_SetDllDirectory(const WCHAR *aDllDirectory)
{
typedef BOOL
(WINAPI *pfnSetDllDirectory) (LPCWSTR);
pfnSetDllDirectory setDllDirectory = nsnull;
setDllDirectory = reinterpret_cast<pfnSetDllDirectory>
(GetProcAddress(GetModuleHandleW(L"kernel32.dll"), "SetDllDirectoryW"));
if (setDllDirectory) {
setDllDirectory(aDllDirectory);
}
}
}
#endif