xpcom/base/nsSetDllDirectory.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef nsSetDllDirectory_h
   8 #define nsSetDllDirectory_h
   9
  10 #ifndef XP_WIN
  11 #error This file only makes sense on Windows.
  12 #endif
  13
  14 #include <windows.h>
  15 #include <nscore.h>
  16 #include <stdlib.h>
  17
  18 namespace mozilla {
  19
  20 static void
  21 SanitizeEnvironmentVariables()
  22 {
  23   DWORD bufferSize = GetEnvironmentVariableW(L"PATH", nullptr, 0);
  24   if (bufferSize) {
  25     wchar_t* originalPath = new wchar_t[bufferSize];
  26     if (bufferSize - 1 == GetEnvironmentVariableW(L"PATH", originalPath,
  27                                                   bufferSize)) {
  28       bufferSize = ExpandEnvironmentStringsW(originalPath, nullptr, 0);
  29       if (bufferSize) {
  30         wchar_t* newPath = new wchar_t[bufferSize];
  31         if (ExpandEnvironmentStringsW(originalPath,
  32                                       newPath,
  33                                       bufferSize)) {
  34           SetEnvironmentVariableW(L"PATH", newPath);
  35         }
  36         delete[] newPath;
  37       }
  38     }
  39     delete[] originalPath;
  40   }
  41 }
  42
  43 }
  44
  45 #endif