diff options
Diffstat (limited to 'zen/basic_math.h')
| -rw-r--r-- | zen/basic_math.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/zen/basic_math.h b/zen/basic_math.h index 41f42dbe..9a3d195e 100644 --- a/zen/basic_math.h +++ b/zen/basic_math.h @@ -1,6 +1,6 @@ // ************************************************************************** // * This file is part of the FreeFileSync project. It is distributed under * -// * GNU General Public License: http://www.gnu.org/licenses/gpl.html * +// * GNU General Public License: http://www.gnu.org/licenses/gpl-3.0 * // * Copyright (C) Zenju (zenju AT gmx DOT de) - All Rights Reserved * // ************************************************************************** @@ -42,7 +42,10 @@ auto nearMatch(const T& val, InputIterator first, InputIterator last) -> typenam template <class T> bool isNull(T value); -int round(double d); //little rounding function +int round(double d); //"little rounding function" + +template <class N> +N integerDivideRoundUp(N numerator, N denominator); template <size_t N, class T> T power(const T& value); @@ -98,7 +101,7 @@ const double ln2 = 0.693147180559945309417; template <class T> inline T abs(T value) { - //static_assert(std::is_signed<T>::value, ""); might not compile for non-built-in arithmetic types; anyway "-value" should emit compiler error or warning for unsigned types + static_assert(std::is_signed<T>::value, ""); if (value < 0) return -value; // operator "?:" caveat: may be different type than "value" else @@ -234,6 +237,15 @@ int round(double d) } +template <class N> inline +N integerDivideRoundUp(N numerator, N denominator) +{ + static_assert(std::is_unsigned<N>::value, ""); + assert(denominator > 0); + return (numerator + denominator - 1) / denominator; +} + + namespace { template <size_t N, class T> |