OpenTTD
array.hpp
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1 /* $Id: array.hpp 23640 2011-12-20 17:57:56Z truebrain $ */
2 
3 /*
4  * This file is part of OpenTTD.
5  * 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.
6  * 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.
7  * 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/>.
8  */
9 
12 #ifndef ARRAY_HPP
13 #define ARRAY_HPP
14 
15 #include "fixedsizearray.hpp"
16 #include "str.hpp"
17 
22 template <class T, uint B = 1024, uint N = B>
23 class SmallArray {
24 protected:
27 
28  static const uint Tcapacity = B * N;
29 
31 
34  {
35  uint super_size = data.Length();
36  if (super_size > 0) {
37  SubArray& s = data[super_size - 1];
38  if (!s.IsFull()) return s;
39  }
40  return *data.AppendC();
41  }
42 
43 public:
45  inline SmallArray() { }
47  inline void Clear() {data.Clear();}
49  inline uint Length() const
50  {
51  uint super_size = data.Length();
52  if (super_size == 0) return 0;
53  uint sub_size = data[super_size - 1].Length();
54  return (super_size - 1) * B + sub_size;
55  }
57  inline bool IsEmpty() { return data.IsEmpty(); }
59  inline bool IsFull() { return data.IsFull() && data[N - 1].IsFull(); }
61  inline T *Append() { return FirstFreeSubArray().Append(); }
63  inline T *AppendC() { return FirstFreeSubArray().AppendC(); }
65  inline T& operator [] (uint index)
66  {
67  const SubArray& s = data[index / B];
68  T& item = s[index % B];
69  return item;
70  }
72  inline const T& operator [] (uint index) const
73  {
74  const SubArray& s = data[index / B];
75  const T& item = s[index % B];
76  return item;
77  }
78 
83  template <typename D> void Dump(D &dmp) const
84  {
85  dmp.WriteLine("capacity = %d", Tcapacity);
86  uint num_items = Length();
87  dmp.WriteLine("num_items = %d", num_items);
88  CStrA name;
89  for (uint i = 0; i < num_items; i++) {
90  const T& item = (*this)[i];
91  name.Format("item[%d]", i);
92  dmp.WriteStructT(name.Data(), &item);
93  }
94  }
95 };
96 
97 #endif /* ARRAY_HPP */