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1// -*- C++ -*-2//===----------------------------------------------------------------------===//3//4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.5// See https://llvm.org/LICENSE.txt for license information.6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception7//8//===----------------------------------------------------------------------===//9 10#ifndef _LIBCPP___CHRONO_HH_MM_SS_H11#define _LIBCPP___CHRONO_HH_MM_SS_H12 13#include <__chrono/duration.h>14#include <__chrono/time_point.h>15#include <__config>16#include <__type_traits/common_type.h>17#include <ratio>18 19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)20# pragma GCC system_header21#endif22 23#if _LIBCPP_STD_VER >= 2024 25_LIBCPP_BEGIN_NAMESPACE_STD26 27namespace chrono {28 29template <class _Duration>30class hh_mm_ss {31private:32 static_assert(__is_duration_v<_Duration>, "template parameter of hh_mm_ss must be a std::chrono::duration");33 using __CommonType _LIBCPP_NODEBUG = common_type_t<_Duration, chrono::seconds>;34 35 _LIBCPP_HIDE_FROM_ABI static constexpr uint64_t __pow10(unsigned __exp) {36 uint64_t __ret = 1;37 for (unsigned __i = 0; __i < __exp; ++__i)38 __ret *= 10U;39 return __ret;40 }41 42 _LIBCPP_HIDE_FROM_ABI static constexpr unsigned __width(uint64_t __n, uint64_t __d = 10, unsigned __w = 0) {43 if (__n >= 2 && __d != 0 && __w < 19)44 return 1 + __width(__n, __d % __n * 10, __w + 1);45 return 0;46 }47 48public:49 _LIBCPP_HIDE_FROM_ABI static unsigned constexpr fractional_width =50 __width(__CommonType::period::den) < 19 ? __width(__CommonType::period::den) : 6u;51 using precision = duration<typename __CommonType::rep, ratio<1, __pow10(fractional_width)>>;52 53 _LIBCPP_HIDE_FROM_ABI constexpr hh_mm_ss() noexcept : hh_mm_ss{_Duration::zero()} {}54 55 _LIBCPP_HIDE_FROM_ABI constexpr explicit hh_mm_ss(_Duration __d) noexcept56 : __is_neg_(__d < _Duration(0)),57 __h_(chrono::duration_cast<chrono::hours>(chrono::abs(__d))),58 __m_(chrono::duration_cast<chrono::minutes>(chrono::abs(__d) - hours())),59 __s_(chrono::duration_cast<chrono::seconds>(chrono::abs(__d) - hours() - minutes())),60 __f_(chrono::duration_cast<precision>(chrono::abs(__d) - hours() - minutes() - seconds())) {}61 62 _LIBCPP_HIDE_FROM_ABI constexpr bool is_negative() const noexcept { return __is_neg_; }63 _LIBCPP_HIDE_FROM_ABI constexpr chrono::hours hours() const noexcept { return __h_; }64 _LIBCPP_HIDE_FROM_ABI constexpr chrono::minutes minutes() const noexcept { return __m_; }65 _LIBCPP_HIDE_FROM_ABI constexpr chrono::seconds seconds() const noexcept { return __s_; }66 _LIBCPP_HIDE_FROM_ABI constexpr precision subseconds() const noexcept { return __f_; }67 68 _LIBCPP_HIDE_FROM_ABI constexpr precision to_duration() const noexcept {69 auto __dur = __h_ + __m_ + __s_ + __f_;70 return __is_neg_ ? -__dur : __dur;71 }72 73 _LIBCPP_HIDE_FROM_ABI constexpr explicit operator precision() const noexcept { return to_duration(); }74 75private:76 bool __is_neg_;77 chrono::hours __h_;78 chrono::minutes __m_;79 chrono::seconds __s_;80 precision __f_;81};82_LIBCPP_CTAD_SUPPORTED_FOR_TYPE(hh_mm_ss);83 84_LIBCPP_HIDE_FROM_ABI inline constexpr bool is_am(const hours& __h) noexcept {85 return __h >= hours(0) && __h < hours(12);86}87_LIBCPP_HIDE_FROM_ABI inline constexpr bool is_pm(const hours& __h) noexcept {88 return __h >= hours(12) && __h < hours(24);89}90 91_LIBCPP_HIDE_FROM_ABI inline constexpr hours make12(const hours& __h) noexcept {92 if (__h == hours(0))93 return hours(12);94 else if (__h <= hours(12))95 return __h;96 else97 return __h - hours(12);98}99 100_LIBCPP_HIDE_FROM_ABI inline constexpr hours make24(const hours& __h, bool __is_pm) noexcept {101 if (__is_pm)102 return __h == hours(12) ? __h : __h + hours(12);103 else104 return __h == hours(12) ? hours(0) : __h;105}106} // namespace chrono107 108_LIBCPP_END_NAMESPACE_STD109 110#endif // _LIBCPP_STD_VER >= 20111 112#endif // _LIBCPP___CHRONO_HH_MM_SS_H113