array.hpp

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00001 /* $Id: array.hpp 18826 2010-01-16 14:22:19Z frosch $ */
00002 
00003 /*
00004  * This file is part of OpenTTD.
00005  * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
00006  * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
00007  * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
00008  */
00009 
00012 #ifndef  ARRAY_HPP
00013 #define  ARRAY_HPP
00014 
00015 #include "fixedsizearray.hpp"
00016 #include "str.hpp"
00017 
00020 template <class T, uint B = 1024, uint N = B>
00021 class SmallArray {
00022 protected:
00023   typedef FixedSizeArray<T, B> SubArray; 
00024   typedef FixedSizeArray<SubArray, N> SuperArray; 
00025 
00026   static const uint Tcapacity = B * N; 
00027 
00028   SuperArray data; 
00029 
00031   FORCEINLINE SubArray& FirstFreeSubArray()
00032   {
00033     uint super_size = data.Length();
00034     if (super_size > 0) {
00035       SubArray& s = data[super_size - 1];
00036       if (!s.IsFull()) return s;
00037     }
00038     return *data.AppendC();
00039   }
00040 
00041 public:
00043   FORCEINLINE SmallArray() { }
00045   FORCEINLINE void Clear() {data.Clear();}
00047   FORCEINLINE uint Length() const
00048   {
00049     uint super_size = data.Length();
00050     if (super_size == 0) return 0;
00051     uint sub_size = data[super_size - 1].Length();
00052     return (super_size - 1) * B + sub_size;
00053   }
00055   FORCEINLINE bool IsEmpty() { return data.IsEmpty(); }
00057   FORCEINLINE bool IsFull() { return data.IsFull() && data[N - 1].IsFull(); }
00059   FORCEINLINE T *Append() { return FirstFreeSubArray().Append(); }
00061   FORCEINLINE T *AppendC() { return FirstFreeSubArray().AppendC(); }
00063   FORCEINLINE T& operator [] (uint index)
00064   {
00065     const SubArray& s = data[index / B];
00066     T& item = s[index % B];
00067     return item;
00068   }
00070   FORCEINLINE const T& operator [] (uint index) const
00071   {
00072     const SubArray& s = data[index / B];
00073     const T& item = s[index % B];
00074     return item;
00075   }
00076 
00077   template <typename D> void Dump(D &dmp) const
00078   {
00079     dmp.WriteLine("capacity = %d", Tcapacity);
00080     uint num_items = Length();
00081     dmp.WriteLine("num_items = %d", num_items);
00082     CStrA name;
00083     for (uint i = 0; i < num_items; i++) {
00084       const T& item = (*this)[i];
00085       name.Format("item[%d]", i);
00086       dmp.WriteStructT(name.Data(), &item);
00087     }
00088   }
00089 };
00090 
00091 #endif /* ARRAY_HPP */

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