array.hpp

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00001 /* $Id: array.hpp 21594 2010-12-22 11:24:38Z alberth $ */
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 
00022 template <class T, uint B = 1024, uint N = B>
00023 class SmallArray {
00024 protected:
00025   typedef FixedSizeArray<T, B> SubArray; 
00026   typedef FixedSizeArray<SubArray, N> SuperArray; 
00027 
00028   static const uint Tcapacity = B * N; 
00029 
00030   SuperArray data; 
00031 
00033   FORCEINLINE SubArray& FirstFreeSubArray()
00034   {
00035     uint super_size = data.Length();
00036     if (super_size > 0) {
00037       SubArray& s = data[super_size - 1];
00038       if (!s.IsFull()) return s;
00039     }
00040     return *data.AppendC();
00041   }
00042 
00043 public:
00045   FORCEINLINE SmallArray() { }
00047   FORCEINLINE void Clear() {data.Clear();}
00049   FORCEINLINE uint Length() const
00050   {
00051     uint super_size = data.Length();
00052     if (super_size == 0) return 0;
00053     uint sub_size = data[super_size - 1].Length();
00054     return (super_size - 1) * B + sub_size;
00055   }
00057   FORCEINLINE bool IsEmpty() { return data.IsEmpty(); }
00059   FORCEINLINE bool IsFull() { return data.IsFull() && data[N - 1].IsFull(); }
00061   FORCEINLINE T *Append() { return FirstFreeSubArray().Append(); }
00063   FORCEINLINE T *AppendC() { return FirstFreeSubArray().AppendC(); }
00065   FORCEINLINE T& operator [] (uint index)
00066   {
00067     const SubArray& s = data[index / B];
00068     T& item = s[index % B];
00069     return item;
00070   }
00072   FORCEINLINE const T& operator [] (uint index) const
00073   {
00074     const SubArray& s = data[index / B];
00075     const T& item = s[index % B];
00076     return item;
00077   }
00078 
00079   template <typename D> void Dump(D &dmp) const
00080   {
00081     dmp.WriteLine("capacity = %d", Tcapacity);
00082     uint num_items = Length();
00083     dmp.WriteLine("num_items = %d", num_items);
00084     CStrA name;
00085     for (uint i = 0; i < num_items; i++) {
00086       const T& item = (*this)[i];
00087       name.Format("item[%d]", i);
00088       dmp.WriteStructT(name.Data(), &item);
00089     }
00090   }
00091 };
00092 
00093 #endif /* ARRAY_HPP */

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