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csutil/strhash.h

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00001 /*
00002     Copyright (C) 2002 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_STRHASH_H__
00020 #define __CS_STRHASH_H__
00021 
00022 #include "csextern.h"
00023 #include "csutil/hash.h"
00024 #include "csutil/mempool.h"
00025 #include "iutil/strset.h"
00026 
00038 class CS_CRYSTALSPACE_EXPORT csStringHash
00039 {
00040 private:
00041   typedef csHash<csStringID, char const*> HashType;
00042   HashType registry;
00043   csMemoryPool pool;
00044 
00045   void Copy(csStringHash const&);
00046 
00047 public:
00048   typedef HashType::ConstGlobalIterator GlobalIterator;
00049 
00050 public:
00052   csStringHash (size_t size = 23);
00054   csStringHash (csStringHash const& h) { Copy(h); }
00056   ~csStringHash ();
00058   csStringHash& operator=(csStringHash const& h) { Copy(h); return *this; }
00059 
00079   const char* Register (const char* s, csStringID id = 0);
00080 
00086   csStringID Request (const char* s) const;
00087 
00098   const char* Request (csStringID id) const;
00099 
00105   bool Contains(char const* s) const
00106   { return Request(s) != csInvalidStringID; }
00107 
00116   bool Contains(csStringID id) const
00117   { return Request(id) != 0; }
00118 
00123   bool Delete(char const* s);
00124 
00131   bool Delete(csStringID id);
00132 
00136   void Empty ();
00137 
00142   /*CS_DEPRECATED_METHOD("Use Empty() instead.")*/
00143   void Clear ()
00144   { Empty(); }
00145 
00147   size_t GetSize () const
00148   { return registry.GetSize (); }
00149 
00155   bool IsEmpty() const
00156   { return GetSize() == 0; }
00157 
00163   GlobalIterator GetIterator () const
00164   { return registry.GetIterator(); }
00165 };
00166 
00167 #endif // __CS_STRHASH_H__

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