toolkit/xre/CmdLineAndEnvUtils.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsCOMPtr.h"
   7 #include "nsDependentString.h"
   8 #include "prenv.h"
   9
  10 namespace mozilla {
  11
  12 // Load the path of a file saved with SaveFileToEnv
  13 already_AddRefed<nsIFile> GetFileFromEnv(const char* name) {
  14   nsresult rv;
  15   nsCOMPtr<nsIFile> file;
  16
  17 #ifdef XP_WIN
  18   WCHAR path[_MAX_PATH];
  19   if (!GetEnvironmentVariableW(NS_ConvertASCIItoUTF16(name).get(), path,
  20                                _MAX_PATH))
  21     return nullptr;
  22
  23   rv = NS_NewLocalFile(nsDependentString(path), true, getter_AddRefs(file));
  24   if (NS_FAILED(rv)) return nullptr;
  25
  26   return file.forget();
  27 #else
  28   const char* arg = PR_GetEnv(name);
  29   if (!arg || !*arg) {
  30     return nullptr;
  31   }
  32
  33   rv = NS_NewNativeLocalFile(nsDependentCString(arg), true,
  34                              getter_AddRefs(file));
  35   if (NS_FAILED(rv)) {
  36     return nullptr;
  37   }
  38
  39   return file.forget();
  40 #endif
  41 }
  42
  43 }  // namespace mozilla