integer.hpp File Reference

#include "shambase/aliases_int.hpp"
#include "shambase/type_traits.hpp"
#include <type_traits>

Include dependency graph for integer.hpp:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Namespaces
namespace	shambase
	namespace for basic c++ utilities

Functions
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
constexpr bool	shambase::is_pow_of_two_fast (T v) noexcept
	determine if v is a power of two Warning : this function return true if v == 0 Source : https://graphics.stanford.edu/~seander/bithacks.html
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
constexpr bool	shambase::is_pow_of_two (T v) noexcept
	determine if v is a power of two and check if v==0 Source : https://graphics.stanford.edu/~seander/bithacks.html
template<class T , std::enable_if_t< std::is_integral_v< T >||std::is_signed_v< T >, int > = 0>
constexpr bool	shambase::sign_differ (T a, T b) noexcept
	check if the sign of the two integers differs Source : https://graphics.stanford.edu/~seander/bithacks.html
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
void	shambase::xor_swap (T &a, T &b)
	swap two values using xor Source : https://graphics.stanford.edu/~seander/bithacks.html
template<class T , std::enable_if_t< std::is_integral_v< T >||(!std::is_signed_v< T >), int > = 0>
constexpr T	shambase::roundup_pow2 (T v) noexcept
	round up to the next power of two Source : https://graphics.stanford.edu/~seander/bithacks.html
constexpr u32	shambase::group_count (u32 len, u32 group_size)
	Calculates the number of groups based on the length and group size.
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
T	shambase::select_bit (T value, T bitnum)
	Selects and returns the bit at a specific position in the given value.
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
constexpr T	shambase::most_sig_bit_mask () noexcept
	Generates a mask with only the most significant bit set.
template<class T , std::enable_if_t< std::is_integral_v< T >, int > = 0>
constexpr bool	shambase::is_most_sig_bit_set (const T x) noexcept
	Checks if the most significant bit is set in the given value.
template<i32 power, class T >
constexpr T	shambase::pow_constexpr (T a) noexcept
	Calculates the power of a number at compile time.
template<u32 flag>
constexpr bool	shambase::is_flag_on (u32 val)

Detailed Description

Author

Timothée David–Cléris (tim.s.nosp@m.hamr.nosp@m.ock@p.nosp@m.roto.nosp@m.n.me)

Definition in file integer.hpp.