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csutil/hashhandlers.h

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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 "hash.h"
00028 #include "ref.h"
00029 #include "util.h"
00030 
00039 class csConstCharHashKeyHandler
00040 {
00041 public:
00042   static uint32 ComputeHash (const char* const& key)
00043   {
00044     return (csHashCompute (key));
00045   }
00046 
00047   static bool CompareKeys (const char* const& key1, const char* const& key2)
00048   {
00049     return (strcmp (key1, key2) == 0);
00050   }
00051 };
00052 
00058 class csStrKey
00059 {
00060 private:
00061   char* str;
00062 
00063 public:
00064   csStrKey (const char* s) { str = csStrNew (s); }
00065   csStrKey (const csStrKey& c) { str = csStrNew (c.str); }
00066   ~csStrKey () { delete[] str; }
00067   operator const char* () const { return str; }
00068 };
00069 
00076 template <class T>
00077 class csRefHashKeyHandler
00078 {
00079 public:
00080   static uint32 ComputeHash (const csRef<T>& key)
00081   {
00082     return (uint32)((T*)key);
00083   }
00084 
00085   static bool CompareKeys (const csRef<T>& key1, const csRef<T>& key2)
00086   {
00087     return ((T*)key1 == (T*)key2);
00088   }
00089 };
00090 
00091 #endif // __CS_UTIL_HASHHANDLERS_H__

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