1 files changed, 48 insertions, 0 deletions
diff --git a/toolkit/xre/CmdLineAndEnvUtils.cpp b/toolkit/xre/CmdLineAndEnvUtils.cpp
new file mode 100644
index 0000000000..634071bc90
--- /dev/null
+++ b/toolkit/xre/CmdLineAndEnvUtils.cpp
@@ -0,0 +1,48 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsCOMPtr.h"
+#include "nsIFile.h"
+#include "nsDependentString.h"
+#include "prenv.h"
+
+#ifdef XP_WIN
+#  include <windows.h>
+#endif
+
+namespace mozilla {
+
+// Load the path of a file saved with SaveFileToEnv
+already_AddRefed<nsIFile> GetFileFromEnv(const char* name) {
+  nsresult rv;
+  nsCOMPtr<nsIFile> file;
+
+#ifdef XP_WIN
+  WCHAR path[_MAX_PATH];
+  if (!GetEnvironmentVariableW(NS_ConvertASCIItoUTF16(name).get(), path,
+                               _MAX_PATH))
+    return nullptr;
+
+  rv = NS_NewLocalFile(nsDependentString(path), true, getter_AddRefs(file));
+  if (NS_FAILED(rv)) return nullptr;
+
+  return file.forget();
+#else
+  const char* arg = PR_GetEnv(name);
+  if (!arg || !*arg) {
+    return nullptr;
+  }
+
+  rv = NS_NewNativeLocalFile(nsDependentCString(arg), true,
+                             getter_AddRefs(file));
+  if (NS_FAILED(rv)) {
+    return nullptr;
+  }
+
+  return file.forget();
+#endif
+}
+
+}  // namespace mozilla