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div_ceil.hpp
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1/*******************************************************************************
2 * tlx/math/div_ceil.hpp
3 *
4 * Part of tlx - http://panthema.net/tlx
5 *
6 * Copyright (C) 2016-2017 Timo Bingmann <tb@panthema.net>
7 *
8 * All rights reserved. Published under the Boost Software License, Version 1.0
9 ******************************************************************************/
10
11#ifndef TLX_MATH_DIV_CEIL_HEADER
12#define TLX_MATH_DIV_CEIL_HEADER
13
14namespace tlx {
15
16//! \addtogroup tlx_math
17//! \{
18
19/******************************************************************************/
20// div_ceil() - calculate n div k with rounding up
21
22//! calculate n div k with rounding up, for n and k positive!
23template <typename IntegralN, typename IntegralK>
24static inline constexpr
25auto div_ceil(const IntegralN& n, const IntegralK& k)->decltype(n + k) {
26 return (n + k - 1) / k;
27}
28
29//! \}
30
31} // namespace tlx
32
33#endif // !TLX_MATH_DIV_CEIL_HEADER
34
35/******************************************************************************/
static constexpr auto div_ceil(const IntegralN &n, const IntegralK &k) -> decltype(n+k)
calculate n div k with rounding up, for n and k positive!
Definition div_ceil.hpp:25