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-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___CHRONO_YEAR_MONTH_DAY_H
11#define _LIBCPP___CHRONO_YEAR_MONTH_DAY_H
12
13#include <__chrono/calendar.h>
14#include <__chrono/day.h>
15#include <__chrono/duration.h>
16#include <__chrono/month.h>
17#include <__chrono/monthday.h>
18#include <__chrono/system_clock.h>
19#include <__chrono/time_point.h>
20#include <__chrono/year.h>
21#include <__chrono/year_month.h>
22#include <__compare/ordering.h>
23#include <__config>
24#include <__cstddef/size_t.h>
25#include <__functional/hash.h>
26#include <limits>
27
28#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
29# pragma GCC system_header
30#endif
31
32#if _LIBCPP_STD_VER >= 20
33
34_LIBCPP_BEGIN_NAMESPACE_STD
35
36namespace chrono {
37
38class year_month_day_last;
39
40class year_month_day {
41private:
42 chrono::year __y_;
43 chrono::month __m_;
44 chrono::day __d_;
45
46public:
47 year_month_day() = default;
48 inline constexpr year_month_day(
49 const chrono::year& __yval, const chrono::month& __mval, const chrono::day& __dval) noexcept
50 : __y_{__yval}, __m_{__mval}, __d_{__dval} {}
51 constexpr year_month_day(const year_month_day_last& __ymdl) noexcept;
52 inline constexpr year_month_day(const sys_days& __sysd) noexcept
53 : year_month_day(__from_days(d: __sysd.time_since_epoch())) {}
54 inline explicit constexpr year_month_day(const local_days& __locd) noexcept
55 : year_month_day(__from_days(d: __locd.time_since_epoch())) {}
56
57 constexpr year_month_day& operator+=(const months& __dm) noexcept;
58 constexpr year_month_day& operator-=(const months& __dm) noexcept;
59 constexpr year_month_day& operator+=(const years& __dy) noexcept;
60 constexpr year_month_day& operator-=(const years& __dy) noexcept;
61
62 [[nodiscard]] inline constexpr chrono::year year() const noexcept { return __y_; }
63 [[nodiscard]] inline constexpr chrono::month month() const noexcept { return __m_; }
64 [[nodiscard]] inline constexpr chrono::day day() const noexcept { return __d_; }
65 inline constexpr operator sys_days() const noexcept { return sys_days{__to_days()}; }
66 inline explicit constexpr operator local_days() const noexcept { return local_days{__to_days()}; }
67
68 [[nodiscard]] constexpr bool ok() const noexcept;
69
70 static constexpr year_month_day __from_days(days __d) noexcept;
71 constexpr days __to_days() const noexcept;
72};
73
74// https://howardhinnant.github.io/date_algorithms.html#civil_from_days
75inline constexpr year_month_day year_month_day::__from_days(days __d) noexcept {
76 static_assert(numeric_limits<unsigned>::digits >= 18, "");
77 static_assert(numeric_limits<int>::digits >= 20, "");
78 const int __z = __d.count() + 719468;
79 const int __era = (__z >= 0 ? __z : __z - 146096) / 146097;
80 const unsigned __doe = static_cast<unsigned>(__z - __era * 146097); // [0, 146096]
81 const unsigned __yoe = (__doe - __doe / 1460 + __doe / 36524 - __doe / 146096) / 365; // [0, 399]
82 const int __yr = static_cast<int>(__yoe) + __era * 400;
83 const unsigned __doy = __doe - (365 * __yoe + __yoe / 4 - __yoe / 100); // [0, 365]
84 const unsigned __mp = (5 * __doy + 2) / 153; // [0, 11]
85 const unsigned __dy = __doy - (153 * __mp + 2) / 5 + 1; // [1, 31]
86 const unsigned __mth = __mp + (__mp < 10 ? 3 : -9); // [1, 12]
87 return year_month_day{chrono::year{__yr + (__mth <= 2)}, chrono::month{__mth}, chrono::day{__dy}};
88}
89
90// https://howardhinnant.github.io/date_algorithms.html#days_from_civil
91inline constexpr days year_month_day::__to_days() const noexcept {
92 static_assert(numeric_limits<unsigned>::digits >= 18, "");
93 static_assert(numeric_limits<int>::digits >= 20, "");
94
95 const int __yr = static_cast<int>(__y_) - (__m_ <= February);
96 const unsigned __mth = static_cast<unsigned>(__m_);
97 const unsigned __dy = static_cast<unsigned>(__d_);
98
99 const int __era = (__yr >= 0 ? __yr : __yr - 399) / 400;
100 const unsigned __yoe = static_cast<unsigned>(__yr - __era * 400); // [0, 399]
101 const unsigned __doy = (153 * (__mth + (__mth > 2 ? -3 : 9)) + 2) / 5 + __dy - 1; // [0, 365]
102 const unsigned __doe = __yoe * 365 + __yoe / 4 - __yoe / 100 + __doy; // [0, 146096]
103 return days{__era * 146097 + static_cast<int>(__doe) - 719468};
104}
105
106inline constexpr bool operator==(const year_month_day& __lhs, const year_month_day& __rhs) noexcept {
107 return __lhs.year() == __rhs.year() && __lhs.month() == __rhs.month() && __lhs.day() == __rhs.day();
108}
109
110inline constexpr strong_ordering operator<=>(const year_month_day& __lhs, const year_month_day& __rhs) noexcept {
111 if (auto __c = __lhs.year() <=> __rhs.year(); __c != 0)
112 return __c;
113 if (auto __c = __lhs.month() <=> __rhs.month(); __c != 0)
114 return __c;
115 return __lhs.day() <=> __rhs.day();
116}
117
118[[nodiscard]] inline constexpr year_month_day operator/(const year_month& __lhs, const day& __rhs) noexcept {
119 return year_month_day{__lhs.year(), __lhs.month(), __rhs};
120}
121
122[[nodiscard]] inline constexpr year_month_day operator/(const year_month& __lhs, int __rhs) noexcept {
123 return __lhs / day(__rhs);
124}
125
126[[nodiscard]] inline constexpr year_month_day operator/(const year& __lhs, const month_day& __rhs) noexcept {
127 return __lhs / __rhs.month() / __rhs.day();
128}
129
130[[nodiscard]] inline constexpr year_month_day operator/(int __lhs, const month_day& __rhs) noexcept {
131 return year(__lhs) / __rhs;
132}
133
134[[nodiscard]] inline constexpr year_month_day operator/(const month_day& __lhs, const year& __rhs) noexcept {
135 return __rhs / __lhs;
136}
137
138[[nodiscard]] inline constexpr year_month_day operator/(const month_day& __lhs, int __rhs) noexcept {
139 return year(__rhs) / __lhs;
140}
141
142[[nodiscard]] inline constexpr year_month_day operator+(const year_month_day& __lhs, const months& __rhs) noexcept {
143 return (__lhs.year() / __lhs.month() + __rhs) / __lhs.day();
144}
145
146[[nodiscard]] inline constexpr year_month_day operator+(const months& __lhs, const year_month_day& __rhs) noexcept {
147 return __rhs + __lhs;
148}
149
150[[nodiscard]] inline constexpr year_month_day operator-(const year_month_day& __lhs, const months& __rhs) noexcept {
151 return __lhs + -__rhs;
152}
153
154[[nodiscard]] inline constexpr year_month_day operator+(const year_month_day& __lhs, const years& __rhs) noexcept {
155 return (__lhs.year() + __rhs) / __lhs.month() / __lhs.day();
156}
157
158[[nodiscard]] inline constexpr year_month_day operator+(const years& __lhs, const year_month_day& __rhs) noexcept {
159 return __rhs + __lhs;
160}
161
162[[nodiscard]] inline constexpr year_month_day operator-(const year_month_day& __lhs, const years& __rhs) noexcept {
163 return __lhs + -__rhs;
164}
165
166inline constexpr year_month_day& year_month_day::operator+=(const months& __dm) noexcept {
167 *this = *this + __dm;
168 return *this;
169}
170inline constexpr year_month_day& year_month_day::operator-=(const months& __dm) noexcept {
171 *this = *this - __dm;
172 return *this;
173}
174inline constexpr year_month_day& year_month_day::operator+=(const years& __dy) noexcept {
175 *this = *this + __dy;
176 return *this;
177}
178inline constexpr year_month_day& year_month_day::operator-=(const years& __dy) noexcept {
179 *this = *this - __dy;
180 return *this;
181}
182
183class year_month_day_last {
184private:
185 chrono::year __y_;
186 chrono::month_day_last __mdl_;
187
188public:
189 constexpr year_month_day_last(const year& __yval, const month_day_last& __mdlval) noexcept
190 : __y_{__yval}, __mdl_{__mdlval} {}
191
192 constexpr year_month_day_last& operator+=(const months& __m) noexcept;
193 constexpr year_month_day_last& operator-=(const months& __m) noexcept;
194 constexpr year_month_day_last& operator+=(const years& __y) noexcept;
195 constexpr year_month_day_last& operator-=(const years& __y) noexcept;
196
197 [[nodiscard]] inline constexpr chrono::year year() const noexcept { return __y_; }
198 [[nodiscard]] inline constexpr chrono::month month() const noexcept { return __mdl_.month(); }
199 [[nodiscard]] inline constexpr chrono::month_day_last month_day_last() const noexcept { return __mdl_; }
200 [[nodiscard]] constexpr chrono::day day() const noexcept;
201 inline constexpr operator sys_days() const noexcept { return sys_days{year() / month() / day()}; }
202 inline explicit constexpr operator local_days() const noexcept { return local_days{year() / month() / day()}; }
203 [[nodiscard]] inline constexpr bool ok() const noexcept { return __y_.ok() && __mdl_.ok(); }
204};
205
206inline constexpr chrono::day year_month_day_last::day() const noexcept {
207 constexpr chrono::day __d[] = {
208 chrono::day(31),
209 chrono::day(28),
210 chrono::day(31),
211 chrono::day(30),
212 chrono::day(31),
213 chrono::day(30),
214 chrono::day(31),
215 chrono::day(31),
216 chrono::day(30),
217 chrono::day(31),
218 chrono::day(30),
219 chrono::day(31)};
220 return (month() != February || !__y_.is_leap()) && month().ok()
221 ? __d[static_cast<unsigned>(month()) - 1]
222 : chrono::day{29};
223}
224
225inline constexpr bool operator==(const year_month_day_last& __lhs, const year_month_day_last& __rhs) noexcept {
226 return __lhs.year() == __rhs.year() && __lhs.month_day_last() == __rhs.month_day_last();
227}
228
229inline constexpr strong_ordering
230operator<=>(const year_month_day_last& __lhs, const year_month_day_last& __rhs) noexcept {
231 if (auto __c = __lhs.year() <=> __rhs.year(); __c != 0)
232 return __c;
233 return __lhs.month_day_last() <=> __rhs.month_day_last();
234}
235
236[[nodiscard]] inline constexpr year_month_day_last operator/(const year_month& __lhs, last_spec) noexcept {
237 return year_month_day_last{__lhs.year(), month_day_last{__lhs.month()}};
238}
239
240[[nodiscard]] inline constexpr year_month_day_last operator/(const year& __lhs, const month_day_last& __rhs) noexcept {
241 return year_month_day_last{__lhs, __rhs};
242}
243
244[[nodiscard]] inline constexpr year_month_day_last operator/(int __lhs, const month_day_last& __rhs) noexcept {
245 return year_month_day_last{year{__lhs}, __rhs};
246}
247
248[[nodiscard]] inline constexpr year_month_day_last operator/(const month_day_last& __lhs, const year& __rhs) noexcept {
249 return __rhs / __lhs;
250}
251
252[[nodiscard]] inline constexpr year_month_day_last operator/(const month_day_last& __lhs, int __rhs) noexcept {
253 return year{__rhs} / __lhs;
254}
255
256[[nodiscard]] inline constexpr year_month_day_last
257operator+(const year_month_day_last& __lhs, const months& __rhs) noexcept {
258 return (__lhs.year() / __lhs.month() + __rhs) / last;
259}
260
261[[nodiscard]] inline constexpr year_month_day_last
262operator+(const months& __lhs, const year_month_day_last& __rhs) noexcept {
263 return __rhs + __lhs;
264}
265
266[[nodiscard]] inline constexpr year_month_day_last
267operator-(const year_month_day_last& __lhs, const months& __rhs) noexcept {
268 return __lhs + (-__rhs);
269}
270
271[[nodiscard]] inline constexpr year_month_day_last
272operator+(const year_month_day_last& __lhs, const years& __rhs) noexcept {
273 return year_month_day_last{__lhs.year() + __rhs, __lhs.month_day_last()};
274}
275
276[[nodiscard]] inline constexpr year_month_day_last
277operator+(const years& __lhs, const year_month_day_last& __rhs) noexcept {
278 return __rhs + __lhs;
279}
280
281[[nodiscard]] inline constexpr year_month_day_last
282operator-(const year_month_day_last& __lhs, const years& __rhs) noexcept {
283 return __lhs + (-__rhs);
284}
285
286inline constexpr year_month_day_last& year_month_day_last::operator+=(const months& __dm) noexcept {
287 *this = *this + __dm;
288 return *this;
289}
290inline constexpr year_month_day_last& year_month_day_last::operator-=(const months& __dm) noexcept {
291 *this = *this - __dm;
292 return *this;
293}
294inline constexpr year_month_day_last& year_month_day_last::operator+=(const years& __dy) noexcept {
295 *this = *this + __dy;
296 return *this;
297}
298inline constexpr year_month_day_last& year_month_day_last::operator-=(const years& __dy) noexcept {
299 *this = *this - __dy;
300 return *this;
301}
302
303inline constexpr year_month_day::year_month_day(const year_month_day_last& __ymdl) noexcept
304 : __y_{__ymdl.year()}, __m_{__ymdl.month()}, __d_{__ymdl.day()} {}
305
306inline constexpr bool year_month_day::ok() const noexcept {
307 if (!__y_.ok() || !__m_.ok())
308 return false;
309 return chrono::day{1} <= __d_ && __d_ <= (__y_ / __m_ / last).day();
310}
311
312} // namespace chrono
313
314# if _LIBCPP_STD_VER >= 26
315
316template <>
317struct hash<chrono::year_month_day> {
318 [[nodiscard]] static size_t operator()(const chrono::year_month_day& __ymd) noexcept {
319 return std::__hash_combine(
320 lhs: hash<chrono::year>{}(__ymd.year()),
321 rhs: std::__hash_combine(lhs: hash<chrono::month>{}(__ymd.month()), rhs: hash<chrono::day>{}(__ymd.day())));
322 }
323};
324
325template <>
326struct hash<chrono::year_month_day_last> {
327 [[nodiscard]] static size_t operator()(const chrono::year_month_day_last& __ymdl) noexcept {
328 return std::__hash_combine(
329 lhs: hash<chrono::year>{}(__ymdl.year()), rhs: hash<chrono::month_day_last>{}(__ymdl.month_day_last()));
330 }
331};
332
333# endif // _LIBCPP_STD_VER >= 26
334
335_LIBCPP_END_NAMESPACE_STD
336
337#endif // _LIBCPP_STD_VER >= 20
338
339#endif // _LIBCPP___CHRONO_YEAR_MONTH_DAY_H
340