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// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___CHRONO_HH_MM_SS_H
#define _LIBCPP___CHRONO_HH_MM_SS_H
#include <__chrono/duration.h>
#include <__chrono/time_point.h>
#include <__config>
#include <ratio>
#include <type_traits>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if _LIBCPP_STD_VER > 17
_LIBCPP_BEGIN_NAMESPACE_STD
namespace chrono
{
template <class _Duration>
class hh_mm_ss
{
private:
static_assert(__is_duration<_Duration>::value, "template parameter of hh_mm_ss must be a std::chrono::duration");
using __CommonType = common_type_t<_Duration, chrono::seconds>;
_LIBCPP_HIDE_FROM_ABI static constexpr uint64_t __pow10(unsigned __exp)
{
uint64_t __ret = 1;
for (unsigned __i = 0; __i < __exp; ++__i)
__ret *= 10U;
return __ret;
}
_LIBCPP_HIDE_FROM_ABI static constexpr unsigned __width(uint64_t __n, uint64_t __d = 10, unsigned __w = 0)
{
if (__n >= 2 && __d != 0 && __w < 19)
return 1 + __width(__n, __d % __n * 10, __w+1);
return 0;
}
public:
_LIBCPP_HIDE_FROM_ABI static unsigned constexpr fractional_width = __width(__CommonType::period::den) < 19 ?
__width(__CommonType::period::den) : 6u;
using precision = duration<typename __CommonType::rep, ratio<1, __pow10(fractional_width)>>;
_LIBCPP_HIDE_FROM_ABI constexpr hh_mm_ss() noexcept : hh_mm_ss{_Duration::zero()} {}
_LIBCPP_HIDE_FROM_ABI constexpr explicit hh_mm_ss(_Duration __d) noexcept :
__is_neg(__d < _Duration(0)),
__h(duration_cast<chrono::hours> (abs(__d))),
__m(duration_cast<chrono::minutes>(abs(__d) - hours())),
__s(duration_cast<chrono::seconds>(abs(__d) - hours() - minutes())),
__f(duration_cast<precision> (abs(__d) - hours() - minutes() - seconds()))
{}
_LIBCPP_HIDE_FROM_ABI constexpr bool is_negative() const noexcept { return __is_neg; }
_LIBCPP_HIDE_FROM_ABI constexpr chrono::hours hours() const noexcept { return __h; }
_LIBCPP_HIDE_FROM_ABI constexpr chrono::minutes minutes() const noexcept { return __m; }
_LIBCPP_HIDE_FROM_ABI constexpr chrono::seconds seconds() const noexcept { return __s; }
_LIBCPP_HIDE_FROM_ABI constexpr precision subseconds() const noexcept { return __f; }
_LIBCPP_HIDE_FROM_ABI constexpr precision to_duration() const noexcept
{
auto __dur = __h + __m + __s + __f;
return __is_neg ? -__dur : __dur;
}
_LIBCPP_HIDE_FROM_ABI constexpr explicit operator precision() const noexcept { return to_duration(); }
private:
bool __is_neg;
chrono::hours __h;
chrono::minutes __m;
chrono::seconds __s;
precision __f;
};
_LIBCPP_HIDE_FROM_ABI constexpr bool is_am(const hours& __h) noexcept { return __h >= hours( 0) && __h < hours(12); }
_LIBCPP_HIDE_FROM_ABI constexpr bool is_pm(const hours& __h) noexcept { return __h >= hours(12) && __h < hours(24); }
_LIBCPP_HIDE_FROM_ABI constexpr hours make12(const hours& __h) noexcept
{
if (__h == hours( 0)) return hours(12);
else if (__h <= hours(12)) return __h;
else return __h - hours(12);
}
_LIBCPP_HIDE_FROM_ABI constexpr hours make24(const hours& __h, bool __is_pm) noexcept
{
if (__is_pm)
return __h == hours(12) ? __h : __h + hours(12);
else
return __h == hours(12) ? hours(0) : __h;
}
} // namespace chrono
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER > 17
#endif // _LIBCPP___CHRONO_HH_MM_SS_H
|
