CrystalSpace

Public API Reference

Main Page | Modules | Class Hierarchy | Alphabetical List | Class List | File List | Class Members | File Members | Related Pages

hashhandlers.h

Go to the documentation of this file.
00001 /*
00002     Copyright (C) 2003 by Jorrit Tyberghein
00003               (C) 2003 by Frank Richter
00004 
00005     This library is free software; you can redistribute it and/or
00006     modify it under the terms of the GNU Library General Public
00007     License as published by the Free Software Foundation; either
00008     version 2 of the License, or (at your option) any later version.
00009 
00010     This library is distributed in the hope that it will be useful,
00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013     Library General Public License for more details.
00014 
00015     You should have received a copy of the GNU Library General Public
00016     License along with this library; if not, write to the Free
00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00018 */
00019 
00020 #ifndef __CS_UTIL_HASHHANDLERS_H__
00021 #define __CS_UTIL_HASHHANDLERS_H__
00022 
00027 #include "csextern.h"
00028 #include "hash.h"
00029 #include "ref.h"
00030 #include "util.h"
00031 
00040 class csConstCharHashKeyHandler
00041 {
00042 public:
00043   static uint32 ComputeHash (const char* const& key)
00044   {
00045     return (csHashCompute (key));
00046   }
00047 
00048   static bool CompareKeys (const char* const& key1, const char* const& key2)
00049   {
00050     return (strcmp (key1, key2) == 0);
00051   }
00052 };
00053 
00059 class csStrKey
00060 {
00061 private:
00062   char* str;
00063 
00064 public:
00065   csStrKey () { str = 0; }
00066   csStrKey (const char* s) { str = csStrNew (s); }
00067   csStrKey (const csStrKey& c) { str = csStrNew (c.str); }
00068   ~csStrKey () { delete[] str; }
00069   csStrKey& operator=(const csStrKey& o)
00070   {
00071     delete[] str; str = csStrNew (o.str);
00072     return *this;
00073   }
00074   operator const char* () const { return str; }
00075 };
00076 
00083 template <class T>
00084 class csRefHashKeyHandler
00085 {
00086 public:
00087   static uint32 ComputeHash (const csRef<T>& key)
00088   {
00089     return (intptr_t) ((T*)key);
00090   }
00091 
00092   static bool CompareKeys (const csRef<T>& key1, const csRef<T>& key2)
00093   {
00094     return ((T*)key1 == (T*)key2);
00095   }
00096 };
00097 
00101 template <class T>
00102 class csStructKeyHandler
00103 {
00104 public:
00105   static uint32 ComputeHash (const csRef<T>& key)
00106   {
00107     return csHashCompute ((char*)&key, sizeof (T));
00108   }
00109 
00110   static bool CompareKeys (const csRef<T>& key1, const csRef<T>& key2)
00111   {
00112     return (memcmp (&key1, &key2, sizeof (T)) == 0);
00113   }
00114 };
00115 
00116 #endif // __CS_UTIL_HASHHANDLERS_H__

Generated for Crystal Space by doxygen 1.3.9.1