Cross-platform equivalent of fopen, _wfopen_s etc....

chrome/browser/download/download_file.h

 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // Objects that handle file operations for downloads, on the download thread.
 //
 // The DownloadFileManager owns a set of DownloadFile objects, each of which
 // represent one in progress download and performs the disk IO for that
 // download. The DownloadFileManager itself is a singleton object owned by the
 // ResourceDispatcherHost.
@@ skipping 93 matching lines @@
   int request_id() const { return request_id_; }
   bool path_renamed() const { return path_renamed_; }
   bool in_progress() const { return file_ != NULL; }
   void set_in_progress(bool in_progress) { in_progress_ = in_progress; }
 
  private:
   // Open or Close the OS file handle. The file is opened in the constructor
   // based on creation information passed to it, and automatically closed in
   // the destructor.
   void Close();
-  bool Open(const wchar_t* open_mode);
+  bool Open(const char* open_mode);
 
   // OS file handle for writing
   FILE* file_;
 
   // The unique identifier for this download, assigned at creation by
   // the DownloadFileManager for its internal record keeping.
   int id_;
 
   // IDs for looking up the tab we are associated with.
   int render_process_id_;
@@ skipping 139 matching lines @@
   // Used for progress updates on the UI thread, mapping download->id() to bytes
   // received so far. Written to by the file thread and read by the UI thread.
   typedef base::hash_map<int, int64> ProgressMap;
   ProgressMap ui_progress_;
   Lock progress_lock_;
 
   DISALLOW_EVIL_CONSTRUCTORS(DownloadFileManager);
 };
 
 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_FILE_H__