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plugldr.h

00001 /*
00002     Copyright (C) 1998-2001 by Jorrit Tyberghein
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __CS_PLUGLDR_H__
00020 #define __CS_PLUGLDR_H__
00021 
00022 #include "csextern.h"
00023 #include "csutil/parray.h"
00024 #include "csutil/ref.h"
00025 #include "csutil/scf.h"
00026 
00027 struct iObjectRegistry;
00028 
00032 struct csPluginLoadRec
00033 {
00034   char* Tag;
00035   char* ClassID;
00036   csRef<iBase> plugin;
00037 
00038   csPluginLoadRec (const char* iTag, const char* iClassID)
00039   { Tag = csStrNew (iTag); ClassID = csStrNew (iClassID); }
00040   ~csPluginLoadRec ()
00041   { delete [] ClassID; delete [] Tag; }
00042 };
00043 
00047 class CS_CRYSTALSPACE_EXPORT csPluginList : public csPDelArray<csPluginLoadRec>
00048 {
00049 public:
00050   bool Sort (iObjectRegistry* object_reg);
00051 private:
00052   bool RecurseSort (iObjectRegistry*, size_t row, size_t* order, size_t* loop,
00053     bool *matrix);
00054 };
00055 
00060 class CS_CRYSTALSPACE_EXPORT csPluginLoader
00061 {
00062   friend class csPluginList;
00063 
00064 private:
00065   // The object registry.
00066   iObjectRegistry* object_reg;
00067   // Requested plugins.
00068   csPluginList requested_plugins;
00069 
00070 public:
00072   csPluginLoader (iObjectRegistry* object_reg);
00074   virtual ~csPluginLoader ();
00075 
00086   void RequestPlugin (const char* pluginName, const char* tagName);
00087 
00089   bool LoadPlugins ();
00090 };
00091 
00092 #endif // __CS_PLUGLDR_H__
00093 

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