| Message ID | 20250606164156.1442682-6-barnabas.pocze@ideasonboard.com |
|---|---|
| State | New |
| Headers | show |
| Series |
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| Related | show |
diff --git a/include/libcamera/base/details/cxx20.h b/include/libcamera/base/details/cxx20.h index 2d26db53e..8bf45ff11 100644 --- a/include/libcamera/base/details/cxx20.h +++ b/include/libcamera/base/details/cxx20.h @@ -7,9 +7,19 @@ #pragma once +#include <type_traits> + namespace libcamera::details::cxx20 { template<typename T> struct type_identity { using type = T; }; template<typename T> using type_identity_t = typename type_identity<T>::type; +template<typename T> +constexpr bool has_single_bit(T x) noexcept +{ + static_assert(std::is_unsigned_v<T>); + + return x != 0 && (x & (x - 1)) == 0; +} + } /* namespace libcamera::details::cxx20 */
`has_single_bit()` checks if the given unsigned integer has a single bit set, that is, whether the number is a power of two or not. Not all requirements of the C++20 standard are implemented. See https://en.cppreference.com/w/cpp/numeric/has_single_bit Signed-off-by: Barnabás Pőcze <barnabas.pocze@ideasonboard.com> --- include/libcamera/base/details/cxx20.h | 10 ++++++++++ 1 file changed, 10 insertions(+)