src/core/flexarray.h

   1 /*
   2  * This file is part of OpenTTD.
   3  * 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.
   4  * 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.
   5  * 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/>.
   6  */
   7
   8 /** @file flexarray.h Flexible array support. */
   9
  10 #ifndef FLEXARRAY_H
  11 #define FLEXARRAY_H
  12
  13 /** Flexible array base struct to delete several methods. */
  14 struct FlexArrayBase {
  15 protected:
  16         FlexArrayBase (void)
  17         {
  18         }
  19
  20 private:
  21         FlexArrayBase (const FlexArrayBase &) DELETED;
  22
  23         FlexArrayBase & operator = (const FlexArrayBase &) DELETED;
  24
  25         void *operator new (size_t size) DELETED;
  26 };
  27
  28 /** Flexible array base struct to provide custom operator new. */
  29 template <typename T>
  30 struct FlexArray : FlexArrayBase {
  31 protected:
  32         /** Custom operator new to account for the variable-length buffer. */
  33         void *operator new (size_t size, size_t extra1, size_t extra2 = 1)
  34         {
  35                 return ::operator new (size + extra1 * extra2 * sizeof(T));
  36         }
  37 };
  38
  39 #endif /* FLEXARRAY_H */