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+//C-  -*- C++ -*-
+//C- -------------------------------------------------------------------
+//C- DjVuLibre-3.5
+//C- Copyright (c) 2002  Leon Bottou and Yann Le Cun.
+//C- Copyright (c) 2001  AT&T
+//C-
+//C- This software is subject to, and may be distributed under, the
+//C- GNU General Public License, Version 2. The license should have
+//C- accompanied the software or you may obtain a copy of the license
+//C- from the Free Software Foundation at http://www.fsf.org .
+//C-
+//C- This program is distributed in the hope that it will be useful,
+//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
+//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//C- GNU General Public License for more details.
+//C- 
+//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
+//C- distributed by Lizardtech Software.  On July 19th 2002, Lizardtech 
+//C- Software authorized us to replace the original DjVu(r) Reference 
+//C- Library notice by the following text (see doc/lizard2002.djvu):
+//C-
+//C-  ------------------------------------------------------------------
+//C- | DjVu (r) Reference Library (v. 3.5)
+//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
+//C- | The DjVu Reference Library is protected by U.S. Pat. No.
+//C- | 6,058,214 and patents pending.
+//C- |
+//C- | This software is subject to, and may be distributed under, the
+//C- | GNU General Public License, Version 2. The license should have
+//C- | accompanied the software or you may obtain a copy of the license
+//C- | from the Free Software Foundation at http://www.fsf.org .
+//C- |
+//C- | The computer code originally released by LizardTech under this
+//C- | license and unmodified by other parties is deemed "the LIZARDTECH
+//C- | ORIGINAL CODE."  Subject to any third party intellectual property
+//C- | claims, LizardTech grants recipient a worldwide, royalty-free, 
+//C- | non-exclusive license to make, use, sell, or otherwise dispose of 
+//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the 
+//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU 
+//C- | General Public License.   This grant only confers the right to 
+//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to 
+//C- | the extent such infringement is reasonably necessary to enable 
+//C- | recipient to make, have made, practice, sell, or otherwise dispose 
+//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to 
+//C- | any greater extent that may be necessary to utilize further 
+//C- | modifications or combinations.
+//C- |
+//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
+//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
+//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+//C- +------------------------------------------------------------------
+// 
+// $Id: GOS.h,v 1.8 2003/11/07 22:08:21 leonb Exp $
+// $Name: release_3_5_15 $
+
+#ifndef _GOS_H_
+#define _GOS_H_
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#if NEED_GNUG_PRAGMAS
+# pragma interface
+#endif
+
+/** @name GOS.h
+    Files #"GOS.h"# and #"GOS.cpp"# implement operating system 
+    dependent functions with a unified interface.  All these functions
+    are implemented as static member of class \Ref{GOS}. 
+    Functions are provided for testing the presence of a file or a directory
+    (\Ref{GOS::is_file}, \Ref{GOS::is_dir}), for manipulating file and directory names
+    (\Ref{GOS::dirname}, \Ref{GOS::basename}, \Ref{GOS::expand_name},
+    for obtaining and changing the current directory (\Ref{GOS::cwd}),
+    for converting between file names and urls (\Ref{GOS::filename_to_url},
+    \Ref{GOS::url_to_filename}), and for counting time (\Ref{GOS::ticks},
+    \Ref{GOS::sleep}).
+    
+    @memo
+    Operating System dependent functions.
+    @author
+    L\'eon Bottou <[email protected]> -- Initial implementation
+    @version
+    #$Id: GOS.h,v 1.8 2003/11/07 22:08:21 leonb Exp $#
+*/
+//@{
+
+#include "DjVuGlobal.h"
+#include "GString.h"
+
+#ifdef HAVE_NAMESPACES
+namespace DJVU {
+# ifdef NOT_DEFINED // Just to fool emacs c++ mode
+}
+#endif
+#endif
+
+
+class GURL;
+
+/** Operating System dependent functions. */
+class GOS 
+{
+ public:
+  // -----------------------------------------
+  // Functions for dealing with filenames
+  // -----------------------------------------
+
+  /** Returns the last component of file name #filename#.  If the filename
+      suffix matches argument #suffix#, the filename suffix is removed.  This
+      function works like the unix command #/bin/basename#, but also supports
+      the naming conventions of other operating systems. */
+  static GUTF8String basename(const GUTF8String &filename, const char *suffix=0);
+
+  /** Sets and returns the current working directory.
+      When argument #dirname# is specified, the current directory is changed
+      to #dirname#. This function always returns the fully qualified name
+      of the current directory. */
+  static GUTF8String cwd(const GUTF8String &dirname=GUTF8String());
+
+  // -----------------------------------------
+  // Functions for measuring time
+  // -----------------------------------------
+  
+  /** Returns a number of elapsed milliseconds.  This number counts elapsed
+      milliseconds since a operating system dependent date. This function is
+      useful for timing code. */
+  static unsigned long ticks();
+
+  /** Sleeps during the specified time expressed in milliseconds.
+      Other threads can run while the calling thread sleeps. */
+  static void sleep(int milliseconds);
+
+  /// Read the named variable from the environment, and converts it to UTF8.
+  static GUTF8String getenv(const GUTF8String &name);
+
+#if 0
+  // -------------------------------------------
+  // Functions for converting filenames and urls
+  // -------------------------------------------
+  /** Encodes all reserved characters, so that the #filename# can be
+      used inside a URL. Every reserved character is encoded using escape
+      sequence in the form of #%XX#. The legal characters are alphanumeric and
+      #$-_.+!*'(),:#.
+      Use \Ref{decode_reserved}() to convert the URL back to the filename. */
+//  static GString encode_reserved(const char * filename);
+  static GString encode_mbcs_reserved(const char * filename);/*MBCS*/
+#endif
+
+};
+
+
+//@}
+// ------------
+
+#ifdef HAVE_NAMESPACES
+}
+# ifndef NOT_USING_DJVU_NAMESPACE
+using namespace DJVU;
+# endif
+#endif
+#endif