/*

* Integer Rounding Functions

* (C) 1999-2007 Jack Lloyd

*

* Botan is released under the Simplified BSD License (see license.txt)

*/

#ifndef BOTAN_ROUNDING_H_

#define BOTAN_ROUNDING_H_

#include <botan/types.h>

namespace Botan {

/**

* Round up

* @param n a non-negative integer

* @param align_to the alignment boundary

* @return n rounded up to a multiple of align_to

*/

inline size_t round_up(size_t n, size_t align_to)

   {

   BOTAN_ARG_CHECK(align_to != 0, "align_to must not be 0");

   if(n % align_to)

      n += align_to - (n % align_to);

   return n;

   }

/**

* Round down

* @param n an integer

* @param align_to the alignment boundary

* @return n rounded down to a multiple of align_to

*/

template<typename T>

inline constexpr T round_down(T n, T align_to)

   {

   return (align_to == 0) ? n : (n - (n % align_to));

   }

}

#endif