GroovX: src/io/writeidmap.h Source File

00001 
00004 
00005 //
00006 // Copyright (c) 2004-2004 California Institute of Technology
00007 // Copyright (c) 2004-2007 University of Southern California
00008 // Rob Peters <rjpeters at usc dot edu>
00009 //
00010 // created: Wed May 26 10:58:49 2004
00011 // commit: $Id: writeidmap.h 10065 2007-04-12 05:54:56Z rjpeters $
00012 // $HeadURL: file:///lab/rjpeters/svnrepo/code/trunk/groovx/src/io/writeidmap.h $
00013 //
00014 // --------------------------------------------------------------------
00015 //
00016 // This file is part of GroovX.
00017 //   [http://ilab.usc.edu/rjpeters/groovx/]
00018 //
00019 // GroovX is free software; you can redistribute it and/or modify it
00020 // under the terms of the GNU General Public License as published by
00021 // the Free Software Foundation; either version 2 of the License, or
00022 // (at your option) any later version.
00023 //
00024 // GroovX is distributed in the hope that it will be useful, but
00025 // WITHOUT ANY WARRANTY; without even the implied warranty of
00026 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00027 // General Public License for more details.
00028 //
00029 // You should have received a copy of the GNU General Public License
00030 // along with GroovX; if not, write to the Free Software Foundation,
00031 // Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
00032 //
00034 
00035 #ifndef GROOVX_IO_WRITEIDMAP_H_UTC20050626084021_DEFINED
00036 #define GROOVX_IO_WRITEIDMAP_H_UTC20050626084021_DEFINED
00037 
00038 #include <map>
00039 
00040 #include "rutz/debug.h"
00041 
00042 namespace io
00043 {
00045 
00048   class write_id_map
00049   {
00050   public:
00051     write_id_map() :
00052       m_map(),
00053       m_next_id(1)
00054     {}
00055 
00056     int get(nub::uid uid) const
00057     {
00058       if (uid == 0) return 0;
00059 
00060       map_type::iterator itr = m_map.find(uid);
00061       if (itr == m_map.end())
00062         {
00063           int val = m_next_id++;
00064           m_map.insert(map_type::value_type(uid, val));
00065           return val;
00066         }
00067 
00068       // else...
00069       GVX_ASSERT((*itr).second != 0);
00070       return (*itr).second;
00071     }
00072 
00073   private:
00074     typedef std::map<nub::uid, int> map_type;
00075 
00076     mutable map_type   m_map;
00077     mutable int        m_next_id;
00078   };
00079 }
00080 
00081 static const char __attribute__((used)) vcid_groovx_io_writeidmap_h_utc20050626084021[] = "$Id: writeidmap.h 10065 2007-04-12 05:54:56Z rjpeters $ $HeadURL: file:
00082 #endif // !GROOVX_IO_WRITEIDMAP_H_UTC20050626084021_DEFINED