source/maths/Sqrt.h

   1 /* Copyright (C) 2010 Wildfire Games.
   2  * This file is part of 0 A.D.
   3  *
   4  * 0 A.D. is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * 0 A.D. is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with 0 A.D.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #ifndef INCLUDED_MATH_SQRT
  19 #define INCLUDED_MATH_SQRT
  20
  21 /**
  22  * 64-bit integer square root.
  23  * Returns r such that r^2 <= n < (r+1)^2, for the complete u64 range.
  24  */
  25 u32 isqrt64(u64 n);
  26
  27 #endif // INCLUDED_MATH_SQRT