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# csutil/dirtyaccessarray.h

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    00001 /*
    00002     Crystal Space utility library: vector class interface
    00003     Copyright (C) 1998,1999,2000 by Andrew Zabolotny <bit@eltech.ru>
    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_DIRTYACCESSARRAY_H__
    00021 #define __CS_DIRTYACCESSARRAY_H__
    00022
    00028 //-----------------------------------------------------------------------------
    00029 // Note *1*: The explicit "this->" is needed by modern compilers (such as gcc
    00030 // 3.4.x) which distinguish between dependent and non-dependent names in
    00031 // templates.  See: http://gcc.gnu.org/onlinedocs/gcc/Name-lookup.html
    00032 //-----------------------------------------------------------------------------
    00033
    00034 #include "array.h"
    00035
    00045 template <class T, class ElementHandler = csArrayElementHandler<T> >
    00046 class csDirtyAccessArray : public csArray<T, ElementHandler>
    00047 {
    00048 public:
    00053   csDirtyAccessArray (int ilimit = 0, int ithreshold = 0)
    00054         : csArray<T, ElementHandler> (ilimit, ithreshold) {}
    00055
    00057   T* GetArray ()
    00058   {
    00059     if (this->Length () > 0) // see *1*
    00060       return &this->Get (0);
    00061     else
    00062       return 0;
    00063   }
    00064
    00066   const T* GetArray () const
    00067   {
    00068     if (this->Length () > 0) // see *1*
    00069       return &this->Get (0);
    00070     else
    00071       return 0;
    00072   }
    00073
    00079   T* GetArrayCopy ()
    00080   {
    00081     if (this->Length () > 0) // see *1*
    00082     {
    00083       T* copy = new T [this->Length ()];
    00084       memcpy (copy, &this->Get (0), sizeof (T) * this->Length ());
    00085       return copy;
    00086     }
    00087     else
    00088       return 0;
    00089   }
    00090 };
    00091
    00097 template <class T, class ElementHandler = csArrayElementHandler<T> >
    00098 class csDirtyAccessArrayRefCounted :
    00099   public csDirtyAccessArray<T, ElementHandler>
    00100 {
    00101 private:
    00102   int RefCount;
    00103 public:
    00104   csDirtyAccessArrayRefCounted (int ilimit = 0, int ithreshold = 0) :
    00105     csDirtyAccessArray<T, ElementHandler> (ilimit, ithreshold), RefCount (0)
    00106   { }
    00107
    00109   void IncRef () { RefCount++; }
    00110
    00112   void DecRef ()
    00113   {
    00114     if (RefCount == 1) { this->DeleteAll (); } // see *1*
    00115     RefCount--;
    00116   }
    00117
    00118 };
    00119
    00120
    00121 #endif // __CS_DIRTYACCESSARRAY_H__