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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__
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