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05aa7e19 JG |
1 | // Formatting library for C++ - chrono support |
2 | // | |
3 | // Copyright (c) 2012 - present, Victor Zverovich | |
4 | // All rights reserved. | |
5 | // | |
6 | // For the license information refer to format.h. | |
7 | ||
8 | #ifndef FMT_CHRONO_H_ | |
9 | #define FMT_CHRONO_H_ | |
10 | ||
11 | #include <algorithm> | |
12 | #include <chrono> | |
8b75cd77 JG |
13 | #include <cmath> // std::isfinite |
14 | #include <cstring> // std::memcpy | |
05aa7e19 JG |
15 | #include <ctime> |
16 | #include <iterator> | |
17 | #include <locale> | |
18 | #include <ostream> | |
19 | #include <type_traits> | |
20 | ||
21 | #include "format.h" | |
22 | ||
23 | FMT_BEGIN_NAMESPACE | |
24 | ||
25 | // Enable tzset. | |
26 | #ifndef FMT_USE_TZSET | |
27 | // UWP doesn't provide _tzset. | |
28 | # if FMT_HAS_INCLUDE("winapifamily.h") | |
29 | # include <winapifamily.h> | |
30 | # endif | |
31 | # if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \ | |
32 | (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP)) | |
33 | # define FMT_USE_TZSET 1 | |
34 | # else | |
35 | # define FMT_USE_TZSET 0 | |
36 | # endif | |
37 | #endif | |
38 | ||
39 | // Enable safe chrono durations, unless explicitly disabled. | |
40 | #ifndef FMT_SAFE_DURATION_CAST | |
41 | # define FMT_SAFE_DURATION_CAST 1 | |
42 | #endif | |
43 | #if FMT_SAFE_DURATION_CAST | |
44 | ||
45 | // For conversion between std::chrono::durations without undefined | |
46 | // behaviour or erroneous results. | |
47 | // This is a stripped down version of duration_cast, for inclusion in fmt. | |
48 | // See https://github.com/pauldreik/safe_duration_cast | |
49 | // | |
50 | // Copyright Paul Dreik 2019 | |
51 | namespace safe_duration_cast { | |
52 | ||
53 | template <typename To, typename From, | |
54 | FMT_ENABLE_IF(!std::is_same<From, To>::value && | |
55 | std::numeric_limits<From>::is_signed == | |
56 | std::numeric_limits<To>::is_signed)> | |
57 | FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { | |
58 | ec = 0; | |
59 | using F = std::numeric_limits<From>; | |
60 | using T = std::numeric_limits<To>; | |
61 | static_assert(F::is_integer, "From must be integral"); | |
62 | static_assert(T::is_integer, "To must be integral"); | |
63 | ||
64 | // A and B are both signed, or both unsigned. | |
65 | if (detail::const_check(F::digits <= T::digits)) { | |
66 | // From fits in To without any problem. | |
67 | } else { | |
68 | // From does not always fit in To, resort to a dynamic check. | |
69 | if (from < (T::min)() || from > (T::max)()) { | |
70 | // outside range. | |
71 | ec = 1; | |
72 | return {}; | |
73 | } | |
74 | } | |
75 | return static_cast<To>(from); | |
76 | } | |
77 | ||
78 | /** | |
79 | * converts From to To, without loss. If the dynamic value of from | |
80 | * can't be converted to To without loss, ec is set. | |
81 | */ | |
82 | template <typename To, typename From, | |
83 | FMT_ENABLE_IF(!std::is_same<From, To>::value && | |
84 | std::numeric_limits<From>::is_signed != | |
85 | std::numeric_limits<To>::is_signed)> | |
86 | FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { | |
87 | ec = 0; | |
88 | using F = std::numeric_limits<From>; | |
89 | using T = std::numeric_limits<To>; | |
90 | static_assert(F::is_integer, "From must be integral"); | |
91 | static_assert(T::is_integer, "To must be integral"); | |
92 | ||
93 | if (detail::const_check(F::is_signed && !T::is_signed)) { | |
94 | // From may be negative, not allowed! | |
95 | if (fmt::detail::is_negative(from)) { | |
96 | ec = 1; | |
97 | return {}; | |
98 | } | |
99 | // From is positive. Can it always fit in To? | |
100 | if (detail::const_check(F::digits > T::digits) && | |
101 | from > static_cast<From>(detail::max_value<To>())) { | |
102 | ec = 1; | |
103 | return {}; | |
104 | } | |
105 | } | |
106 | ||
107 | if (detail::const_check(!F::is_signed && T::is_signed && | |
108 | F::digits >= T::digits) && | |
109 | from > static_cast<From>(detail::max_value<To>())) { | |
110 | ec = 1; | |
111 | return {}; | |
112 | } | |
113 | return static_cast<To>(from); // Lossless conversion. | |
114 | } | |
115 | ||
116 | template <typename To, typename From, | |
117 | FMT_ENABLE_IF(std::is_same<From, To>::value)> | |
118 | FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) { | |
119 | ec = 0; | |
120 | return from; | |
121 | } // function | |
122 | ||
123 | // clang-format off | |
124 | /** | |
125 | * converts From to To if possible, otherwise ec is set. | |
126 | * | |
127 | * input | output | |
128 | * ---------------------------------|--------------- | |
129 | * NaN | NaN | |
130 | * Inf | Inf | |
131 | * normal, fits in output | converted (possibly lossy) | |
132 | * normal, does not fit in output | ec is set | |
133 | * subnormal | best effort | |
134 | * -Inf | -Inf | |
135 | */ | |
136 | // clang-format on | |
137 | template <typename To, typename From, | |
138 | FMT_ENABLE_IF(!std::is_same<From, To>::value)> | |
139 | FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) { | |
140 | ec = 0; | |
141 | using T = std::numeric_limits<To>; | |
142 | static_assert(std::is_floating_point<From>::value, "From must be floating"); | |
143 | static_assert(std::is_floating_point<To>::value, "To must be floating"); | |
144 | ||
145 | // catch the only happy case | |
146 | if (std::isfinite(from)) { | |
147 | if (from >= T::lowest() && from <= (T::max)()) { | |
148 | return static_cast<To>(from); | |
149 | } | |
150 | // not within range. | |
151 | ec = 1; | |
152 | return {}; | |
153 | } | |
154 | ||
155 | // nan and inf will be preserved | |
156 | return static_cast<To>(from); | |
157 | } // function | |
158 | ||
159 | template <typename To, typename From, | |
160 | FMT_ENABLE_IF(std::is_same<From, To>::value)> | |
161 | FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) { | |
162 | ec = 0; | |
163 | static_assert(std::is_floating_point<From>::value, "From must be floating"); | |
164 | return from; | |
165 | } | |
166 | ||
167 | /** | |
168 | * safe duration cast between integral durations | |
169 | */ | |
170 | template <typename To, typename FromRep, typename FromPeriod, | |
171 | FMT_ENABLE_IF(std::is_integral<FromRep>::value), | |
172 | FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)> | |
173 | To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from, | |
174 | int& ec) { | |
175 | using From = std::chrono::duration<FromRep, FromPeriod>; | |
176 | ec = 0; | |
177 | // the basic idea is that we need to convert from count() in the from type | |
178 | // to count() in the To type, by multiplying it with this: | |
179 | struct Factor | |
180 | : std::ratio_divide<typename From::period, typename To::period> {}; | |
181 | ||
182 | static_assert(Factor::num > 0, "num must be positive"); | |
183 | static_assert(Factor::den > 0, "den must be positive"); | |
184 | ||
185 | // the conversion is like this: multiply from.count() with Factor::num | |
186 | // /Factor::den and convert it to To::rep, all this without | |
187 | // overflow/underflow. let's start by finding a suitable type that can hold | |
188 | // both To, From and Factor::num | |
189 | using IntermediateRep = | |
190 | typename std::common_type<typename From::rep, typename To::rep, | |
191 | decltype(Factor::num)>::type; | |
192 | ||
193 | // safe conversion to IntermediateRep | |
194 | IntermediateRep count = | |
195 | lossless_integral_conversion<IntermediateRep>(from.count(), ec); | |
196 | if (ec) return {}; | |
197 | // multiply with Factor::num without overflow or underflow | |
198 | if (detail::const_check(Factor::num != 1)) { | |
199 | const auto max1 = detail::max_value<IntermediateRep>() / Factor::num; | |
200 | if (count > max1) { | |
201 | ec = 1; | |
202 | return {}; | |
203 | } | |
204 | const auto min1 = | |
205 | (std::numeric_limits<IntermediateRep>::min)() / Factor::num; | |
8b75cd77 | 206 | if (!std::is_unsigned<IntermediateRep>::value && count < min1) { |
05aa7e19 JG |
207 | ec = 1; |
208 | return {}; | |
209 | } | |
210 | count *= Factor::num; | |
211 | } | |
212 | ||
213 | if (detail::const_check(Factor::den != 1)) count /= Factor::den; | |
214 | auto tocount = lossless_integral_conversion<typename To::rep>(count, ec); | |
215 | return ec ? To() : To(tocount); | |
216 | } | |
217 | ||
218 | /** | |
219 | * safe duration_cast between floating point durations | |
220 | */ | |
221 | template <typename To, typename FromRep, typename FromPeriod, | |
222 | FMT_ENABLE_IF(std::is_floating_point<FromRep>::value), | |
223 | FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)> | |
224 | To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from, | |
225 | int& ec) { | |
226 | using From = std::chrono::duration<FromRep, FromPeriod>; | |
227 | ec = 0; | |
228 | if (std::isnan(from.count())) { | |
229 | // nan in, gives nan out. easy. | |
230 | return To{std::numeric_limits<typename To::rep>::quiet_NaN()}; | |
231 | } | |
232 | // maybe we should also check if from is denormal, and decide what to do about | |
233 | // it. | |
234 | ||
235 | // +-inf should be preserved. | |
236 | if (std::isinf(from.count())) { | |
237 | return To{from.count()}; | |
238 | } | |
239 | ||
240 | // the basic idea is that we need to convert from count() in the from type | |
241 | // to count() in the To type, by multiplying it with this: | |
242 | struct Factor | |
243 | : std::ratio_divide<typename From::period, typename To::period> {}; | |
244 | ||
245 | static_assert(Factor::num > 0, "num must be positive"); | |
246 | static_assert(Factor::den > 0, "den must be positive"); | |
247 | ||
248 | // the conversion is like this: multiply from.count() with Factor::num | |
249 | // /Factor::den and convert it to To::rep, all this without | |
250 | // overflow/underflow. let's start by finding a suitable type that can hold | |
251 | // both To, From and Factor::num | |
252 | using IntermediateRep = | |
253 | typename std::common_type<typename From::rep, typename To::rep, | |
254 | decltype(Factor::num)>::type; | |
255 | ||
256 | // force conversion of From::rep -> IntermediateRep to be safe, | |
257 | // even if it will never happen be narrowing in this context. | |
258 | IntermediateRep count = | |
259 | safe_float_conversion<IntermediateRep>(from.count(), ec); | |
260 | if (ec) { | |
261 | return {}; | |
262 | } | |
263 | ||
264 | // multiply with Factor::num without overflow or underflow | |
265 | if (detail::const_check(Factor::num != 1)) { | |
266 | constexpr auto max1 = detail::max_value<IntermediateRep>() / | |
267 | static_cast<IntermediateRep>(Factor::num); | |
268 | if (count > max1) { | |
269 | ec = 1; | |
270 | return {}; | |
271 | } | |
272 | constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() / | |
273 | static_cast<IntermediateRep>(Factor::num); | |
274 | if (count < min1) { | |
275 | ec = 1; | |
276 | return {}; | |
277 | } | |
278 | count *= static_cast<IntermediateRep>(Factor::num); | |
279 | } | |
280 | ||
281 | // this can't go wrong, right? den>0 is checked earlier. | |
282 | if (detail::const_check(Factor::den != 1)) { | |
283 | using common_t = typename std::common_type<IntermediateRep, intmax_t>::type; | |
284 | count /= static_cast<common_t>(Factor::den); | |
285 | } | |
286 | ||
287 | // convert to the to type, safely | |
288 | using ToRep = typename To::rep; | |
289 | ||
290 | const ToRep tocount = safe_float_conversion<ToRep>(count, ec); | |
291 | if (ec) { | |
292 | return {}; | |
293 | } | |
294 | return To{tocount}; | |
295 | } | |
296 | } // namespace safe_duration_cast | |
297 | #endif | |
298 | ||
299 | // Prevents expansion of a preceding token as a function-style macro. | |
300 | // Usage: f FMT_NOMACRO() | |
301 | #define FMT_NOMACRO | |
302 | ||
303 | namespace detail { | |
304 | template <typename T = void> struct null {}; | |
305 | inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); } | |
306 | inline null<> localtime_s(...) { return null<>(); } | |
307 | inline null<> gmtime_r(...) { return null<>(); } | |
308 | inline null<> gmtime_s(...) { return null<>(); } | |
309 | ||
310 | inline const std::locale& get_classic_locale() { | |
311 | static const auto& locale = std::locale::classic(); | |
312 | return locale; | |
313 | } | |
314 | ||
315 | template <typename CodeUnit> struct codecvt_result { | |
316 | static constexpr const size_t max_size = 32; | |
317 | CodeUnit buf[max_size]; | |
318 | CodeUnit* end; | |
319 | }; | |
320 | template <typename CodeUnit> | |
321 | constexpr const size_t codecvt_result<CodeUnit>::max_size; | |
322 | ||
323 | template <typename CodeUnit> | |
324 | void write_codecvt(codecvt_result<CodeUnit>& out, string_view in_buf, | |
325 | const std::locale& loc) { | |
05aa7e19 JG |
326 | #if FMT_CLANG_VERSION |
327 | # pragma clang diagnostic push | |
328 | # pragma clang diagnostic ignored "-Wdeprecated" | |
8b75cd77 | 329 | auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc); |
05aa7e19 JG |
330 | # pragma clang diagnostic pop |
331 | #else | |
8b75cd77 | 332 | auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc); |
05aa7e19 JG |
333 | #endif |
334 | auto mb = std::mbstate_t(); | |
335 | const char* from_next = nullptr; | |
336 | auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next, | |
337 | std::begin(out.buf), std::end(out.buf), out.end); | |
338 | if (result != std::codecvt_base::ok) | |
339 | FMT_THROW(format_error("failed to format time")); | |
340 | } | |
341 | ||
342 | template <typename OutputIt> | |
343 | auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc) | |
344 | -> OutputIt { | |
345 | if (detail::is_utf8() && loc != get_classic_locale()) { | |
346 | // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and | |
347 | // gcc-4. | |
8b75cd77 | 348 | #if FMT_MSC_VERSION != 0 || \ |
05aa7e19 JG |
349 | (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI)) |
350 | // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5 | |
351 | // and newer. | |
352 | using code_unit = wchar_t; | |
353 | #else | |
354 | using code_unit = char32_t; | |
355 | #endif | |
356 | ||
357 | using unit_t = codecvt_result<code_unit>; | |
358 | unit_t unit; | |
359 | write_codecvt(unit, in, loc); | |
360 | // In UTF-8 is used one to four one-byte code units. | |
361 | auto&& buf = basic_memory_buffer<char, unit_t::max_size * 4>(); | |
362 | for (code_unit* p = unit.buf; p != unit.end; ++p) { | |
363 | uint32_t c = static_cast<uint32_t>(*p); | |
364 | if (sizeof(code_unit) == 2 && c >= 0xd800 && c <= 0xdfff) { | |
365 | // surrogate pair | |
366 | ++p; | |
367 | if (p == unit.end || (c & 0xfc00) != 0xd800 || | |
368 | (*p & 0xfc00) != 0xdc00) { | |
369 | FMT_THROW(format_error("failed to format time")); | |
370 | } | |
371 | c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00; | |
372 | } | |
373 | if (c < 0x80) { | |
374 | buf.push_back(static_cast<char>(c)); | |
375 | } else if (c < 0x800) { | |
376 | buf.push_back(static_cast<char>(0xc0 | (c >> 6))); | |
377 | buf.push_back(static_cast<char>(0x80 | (c & 0x3f))); | |
378 | } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) { | |
379 | buf.push_back(static_cast<char>(0xe0 | (c >> 12))); | |
380 | buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6))); | |
381 | buf.push_back(static_cast<char>(0x80 | (c & 0x3f))); | |
382 | } else if (c >= 0x10000 && c <= 0x10ffff) { | |
383 | buf.push_back(static_cast<char>(0xf0 | (c >> 18))); | |
384 | buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12))); | |
385 | buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6))); | |
386 | buf.push_back(static_cast<char>(0x80 | (c & 0x3f))); | |
387 | } else { | |
388 | FMT_THROW(format_error("failed to format time")); | |
389 | } | |
390 | } | |
391 | return copy_str<char>(buf.data(), buf.data() + buf.size(), out); | |
392 | } | |
393 | return copy_str<char>(in.data(), in.data() + in.size(), out); | |
394 | } | |
395 | ||
396 | template <typename Char, typename OutputIt, | |
397 | FMT_ENABLE_IF(!std::is_same<Char, char>::value)> | |
398 | auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc) | |
399 | -> OutputIt { | |
400 | codecvt_result<Char> unit; | |
401 | write_codecvt(unit, sv, loc); | |
402 | return copy_str<Char>(unit.buf, unit.end, out); | |
403 | } | |
404 | ||
405 | template <typename Char, typename OutputIt, | |
406 | FMT_ENABLE_IF(std::is_same<Char, char>::value)> | |
407 | auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc) | |
408 | -> OutputIt { | |
409 | return write_encoded_tm_str(out, sv, loc); | |
410 | } | |
411 | ||
412 | template <typename Char> | |
413 | inline void do_write(buffer<Char>& buf, const std::tm& time, | |
414 | const std::locale& loc, char format, char modifier) { | |
415 | auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf); | |
416 | auto&& os = std::basic_ostream<Char>(&format_buf); | |
417 | os.imbue(loc); | |
418 | using iterator = std::ostreambuf_iterator<Char>; | |
419 | const auto& facet = std::use_facet<std::time_put<Char, iterator>>(loc); | |
420 | auto end = facet.put(os, os, Char(' '), &time, format, modifier); | |
421 | if (end.failed()) FMT_THROW(format_error("failed to format time")); | |
422 | } | |
423 | ||
424 | template <typename Char, typename OutputIt, | |
425 | FMT_ENABLE_IF(!std::is_same<Char, char>::value)> | |
426 | auto write(OutputIt out, const std::tm& time, const std::locale& loc, | |
427 | char format, char modifier = 0) -> OutputIt { | |
428 | auto&& buf = get_buffer<Char>(out); | |
429 | do_write<Char>(buf, time, loc, format, modifier); | |
430 | return buf.out(); | |
431 | } | |
432 | ||
433 | template <typename Char, typename OutputIt, | |
434 | FMT_ENABLE_IF(std::is_same<Char, char>::value)> | |
435 | auto write(OutputIt out, const std::tm& time, const std::locale& loc, | |
436 | char format, char modifier = 0) -> OutputIt { | |
437 | auto&& buf = basic_memory_buffer<Char>(); | |
438 | do_write<char>(buf, time, loc, format, modifier); | |
439 | return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc); | |
440 | } | |
441 | ||
442 | } // namespace detail | |
443 | ||
444 | FMT_MODULE_EXPORT_BEGIN | |
445 | ||
446 | /** | |
447 | Converts given time since epoch as ``std::time_t`` value into calendar time, | |
448 | expressed in local time. Unlike ``std::localtime``, this function is | |
449 | thread-safe on most platforms. | |
450 | */ | |
451 | inline std::tm localtime(std::time_t time) { | |
452 | struct dispatcher { | |
453 | std::time_t time_; | |
454 | std::tm tm_; | |
455 | ||
456 | dispatcher(std::time_t t) : time_(t) {} | |
457 | ||
458 | bool run() { | |
459 | using namespace fmt::detail; | |
460 | return handle(localtime_r(&time_, &tm_)); | |
461 | } | |
462 | ||
463 | bool handle(std::tm* tm) { return tm != nullptr; } | |
464 | ||
465 | bool handle(detail::null<>) { | |
466 | using namespace fmt::detail; | |
467 | return fallback(localtime_s(&tm_, &time_)); | |
468 | } | |
469 | ||
470 | bool fallback(int res) { return res == 0; } | |
471 | ||
8b75cd77 | 472 | #if !FMT_MSC_VERSION |
05aa7e19 JG |
473 | bool fallback(detail::null<>) { |
474 | using namespace fmt::detail; | |
475 | std::tm* tm = std::localtime(&time_); | |
476 | if (tm) tm_ = *tm; | |
477 | return tm != nullptr; | |
478 | } | |
479 | #endif | |
480 | }; | |
481 | dispatcher lt(time); | |
482 | // Too big time values may be unsupported. | |
483 | if (!lt.run()) FMT_THROW(format_error("time_t value out of range")); | |
484 | return lt.tm_; | |
485 | } | |
486 | ||
487 | inline std::tm localtime( | |
488 | std::chrono::time_point<std::chrono::system_clock> time_point) { | |
489 | return localtime(std::chrono::system_clock::to_time_t(time_point)); | |
490 | } | |
491 | ||
492 | /** | |
493 | Converts given time since epoch as ``std::time_t`` value into calendar time, | |
494 | expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this | |
495 | function is thread-safe on most platforms. | |
496 | */ | |
497 | inline std::tm gmtime(std::time_t time) { | |
498 | struct dispatcher { | |
499 | std::time_t time_; | |
500 | std::tm tm_; | |
501 | ||
502 | dispatcher(std::time_t t) : time_(t) {} | |
503 | ||
504 | bool run() { | |
505 | using namespace fmt::detail; | |
506 | return handle(gmtime_r(&time_, &tm_)); | |
507 | } | |
508 | ||
509 | bool handle(std::tm* tm) { return tm != nullptr; } | |
510 | ||
511 | bool handle(detail::null<>) { | |
512 | using namespace fmt::detail; | |
513 | return fallback(gmtime_s(&tm_, &time_)); | |
514 | } | |
515 | ||
516 | bool fallback(int res) { return res == 0; } | |
517 | ||
8b75cd77 | 518 | #if !FMT_MSC_VERSION |
05aa7e19 JG |
519 | bool fallback(detail::null<>) { |
520 | std::tm* tm = std::gmtime(&time_); | |
521 | if (tm) tm_ = *tm; | |
522 | return tm != nullptr; | |
523 | } | |
524 | #endif | |
525 | }; | |
526 | dispatcher gt(time); | |
527 | // Too big time values may be unsupported. | |
528 | if (!gt.run()) FMT_THROW(format_error("time_t value out of range")); | |
529 | return gt.tm_; | |
530 | } | |
531 | ||
532 | inline std::tm gmtime( | |
533 | std::chrono::time_point<std::chrono::system_clock> time_point) { | |
534 | return gmtime(std::chrono::system_clock::to_time_t(time_point)); | |
535 | } | |
536 | ||
537 | FMT_BEGIN_DETAIL_NAMESPACE | |
538 | ||
539 | // Writes two-digit numbers a, b and c separated by sep to buf. | |
540 | // The method by Pavel Novikov based on | |
541 | // https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/. | |
542 | inline void write_digit2_separated(char* buf, unsigned a, unsigned b, | |
543 | unsigned c, char sep) { | |
544 | unsigned long long digits = | |
545 | a | (b << 24) | (static_cast<unsigned long long>(c) << 48); | |
546 | // Convert each value to BCD. | |
547 | // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b. | |
548 | // The difference is | |
549 | // y - x = a * 6 | |
550 | // a can be found from x: | |
551 | // a = floor(x / 10) | |
552 | // then | |
553 | // y = x + a * 6 = x + floor(x / 10) * 6 | |
554 | // floor(x / 10) is (x * 205) >> 11 (needs 16 bits). | |
555 | digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6; | |
556 | // Put low nibbles to high bytes and high nibbles to low bytes. | |
557 | digits = ((digits & 0x00f00000f00000f0) >> 4) | | |
558 | ((digits & 0x000f00000f00000f) << 8); | |
559 | auto usep = static_cast<unsigned long long>(sep); | |
560 | // Add ASCII '0' to each digit byte and insert separators. | |
561 | digits |= 0x3030003030003030 | (usep << 16) | (usep << 40); | |
562 | ||
563 | constexpr const size_t len = 8; | |
564 | if (const_check(is_big_endian())) { | |
565 | char tmp[len]; | |
8b75cd77 | 566 | std::memcpy(tmp, &digits, len); |
05aa7e19 JG |
567 | std::reverse_copy(tmp, tmp + len, buf); |
568 | } else { | |
8b75cd77 | 569 | std::memcpy(buf, &digits, len); |
05aa7e19 JG |
570 | } |
571 | } | |
572 | ||
573 | template <typename Period> FMT_CONSTEXPR inline const char* get_units() { | |
574 | if (std::is_same<Period, std::atto>::value) return "as"; | |
575 | if (std::is_same<Period, std::femto>::value) return "fs"; | |
576 | if (std::is_same<Period, std::pico>::value) return "ps"; | |
577 | if (std::is_same<Period, std::nano>::value) return "ns"; | |
578 | if (std::is_same<Period, std::micro>::value) return "µs"; | |
579 | if (std::is_same<Period, std::milli>::value) return "ms"; | |
580 | if (std::is_same<Period, std::centi>::value) return "cs"; | |
581 | if (std::is_same<Period, std::deci>::value) return "ds"; | |
582 | if (std::is_same<Period, std::ratio<1>>::value) return "s"; | |
583 | if (std::is_same<Period, std::deca>::value) return "das"; | |
584 | if (std::is_same<Period, std::hecto>::value) return "hs"; | |
585 | if (std::is_same<Period, std::kilo>::value) return "ks"; | |
586 | if (std::is_same<Period, std::mega>::value) return "Ms"; | |
587 | if (std::is_same<Period, std::giga>::value) return "Gs"; | |
588 | if (std::is_same<Period, std::tera>::value) return "Ts"; | |
589 | if (std::is_same<Period, std::peta>::value) return "Ps"; | |
590 | if (std::is_same<Period, std::exa>::value) return "Es"; | |
591 | if (std::is_same<Period, std::ratio<60>>::value) return "m"; | |
592 | if (std::is_same<Period, std::ratio<3600>>::value) return "h"; | |
593 | return nullptr; | |
594 | } | |
595 | ||
596 | enum class numeric_system { | |
597 | standard, | |
598 | // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale. | |
599 | alternative | |
600 | }; | |
601 | ||
602 | // Parses a put_time-like format string and invokes handler actions. | |
603 | template <typename Char, typename Handler> | |
604 | FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin, | |
605 | const Char* end, | |
606 | Handler&& handler) { | |
607 | auto ptr = begin; | |
608 | while (ptr != end) { | |
609 | auto c = *ptr; | |
610 | if (c == '}') break; | |
611 | if (c != '%') { | |
612 | ++ptr; | |
613 | continue; | |
614 | } | |
615 | if (begin != ptr) handler.on_text(begin, ptr); | |
616 | ++ptr; // consume '%' | |
617 | if (ptr == end) FMT_THROW(format_error("invalid format")); | |
618 | c = *ptr++; | |
619 | switch (c) { | |
620 | case '%': | |
621 | handler.on_text(ptr - 1, ptr); | |
622 | break; | |
623 | case 'n': { | |
624 | const Char newline[] = {'\n'}; | |
625 | handler.on_text(newline, newline + 1); | |
626 | break; | |
627 | } | |
628 | case 't': { | |
629 | const Char tab[] = {'\t'}; | |
630 | handler.on_text(tab, tab + 1); | |
631 | break; | |
632 | } | |
633 | // Year: | |
634 | case 'Y': | |
635 | handler.on_year(numeric_system::standard); | |
636 | break; | |
637 | case 'y': | |
638 | handler.on_short_year(numeric_system::standard); | |
639 | break; | |
640 | case 'C': | |
641 | handler.on_century(numeric_system::standard); | |
642 | break; | |
643 | case 'G': | |
644 | handler.on_iso_week_based_year(); | |
645 | break; | |
646 | case 'g': | |
647 | handler.on_iso_week_based_short_year(); | |
648 | break; | |
649 | // Day of the week: | |
650 | case 'a': | |
651 | handler.on_abbr_weekday(); | |
652 | break; | |
653 | case 'A': | |
654 | handler.on_full_weekday(); | |
655 | break; | |
656 | case 'w': | |
657 | handler.on_dec0_weekday(numeric_system::standard); | |
658 | break; | |
659 | case 'u': | |
660 | handler.on_dec1_weekday(numeric_system::standard); | |
661 | break; | |
662 | // Month: | |
663 | case 'b': | |
664 | case 'h': | |
665 | handler.on_abbr_month(); | |
666 | break; | |
667 | case 'B': | |
668 | handler.on_full_month(); | |
669 | break; | |
670 | case 'm': | |
671 | handler.on_dec_month(numeric_system::standard); | |
672 | break; | |
673 | // Day of the year/month: | |
674 | case 'U': | |
675 | handler.on_dec0_week_of_year(numeric_system::standard); | |
676 | break; | |
677 | case 'W': | |
678 | handler.on_dec1_week_of_year(numeric_system::standard); | |
679 | break; | |
680 | case 'V': | |
681 | handler.on_iso_week_of_year(numeric_system::standard); | |
682 | break; | |
683 | case 'j': | |
684 | handler.on_day_of_year(); | |
685 | break; | |
686 | case 'd': | |
687 | handler.on_day_of_month(numeric_system::standard); | |
688 | break; | |
689 | case 'e': | |
690 | handler.on_day_of_month_space(numeric_system::standard); | |
691 | break; | |
692 | // Hour, minute, second: | |
693 | case 'H': | |
694 | handler.on_24_hour(numeric_system::standard); | |
695 | break; | |
696 | case 'I': | |
697 | handler.on_12_hour(numeric_system::standard); | |
698 | break; | |
699 | case 'M': | |
700 | handler.on_minute(numeric_system::standard); | |
701 | break; | |
702 | case 'S': | |
703 | handler.on_second(numeric_system::standard); | |
704 | break; | |
705 | // Other: | |
706 | case 'c': | |
707 | handler.on_datetime(numeric_system::standard); | |
708 | break; | |
709 | case 'x': | |
710 | handler.on_loc_date(numeric_system::standard); | |
711 | break; | |
712 | case 'X': | |
713 | handler.on_loc_time(numeric_system::standard); | |
714 | break; | |
715 | case 'D': | |
716 | handler.on_us_date(); | |
717 | break; | |
718 | case 'F': | |
719 | handler.on_iso_date(); | |
720 | break; | |
721 | case 'r': | |
722 | handler.on_12_hour_time(); | |
723 | break; | |
724 | case 'R': | |
725 | handler.on_24_hour_time(); | |
726 | break; | |
727 | case 'T': | |
728 | handler.on_iso_time(); | |
729 | break; | |
730 | case 'p': | |
731 | handler.on_am_pm(); | |
732 | break; | |
733 | case 'Q': | |
734 | handler.on_duration_value(); | |
735 | break; | |
736 | case 'q': | |
737 | handler.on_duration_unit(); | |
738 | break; | |
739 | case 'z': | |
740 | handler.on_utc_offset(); | |
741 | break; | |
742 | case 'Z': | |
743 | handler.on_tz_name(); | |
744 | break; | |
745 | // Alternative representation: | |
746 | case 'E': { | |
747 | if (ptr == end) FMT_THROW(format_error("invalid format")); | |
748 | c = *ptr++; | |
749 | switch (c) { | |
750 | case 'Y': | |
751 | handler.on_year(numeric_system::alternative); | |
752 | break; | |
753 | case 'y': | |
754 | handler.on_offset_year(); | |
755 | break; | |
756 | case 'C': | |
757 | handler.on_century(numeric_system::alternative); | |
758 | break; | |
759 | case 'c': | |
760 | handler.on_datetime(numeric_system::alternative); | |
761 | break; | |
762 | case 'x': | |
763 | handler.on_loc_date(numeric_system::alternative); | |
764 | break; | |
765 | case 'X': | |
766 | handler.on_loc_time(numeric_system::alternative); | |
767 | break; | |
768 | default: | |
769 | FMT_THROW(format_error("invalid format")); | |
770 | } | |
771 | break; | |
772 | } | |
773 | case 'O': | |
774 | if (ptr == end) FMT_THROW(format_error("invalid format")); | |
775 | c = *ptr++; | |
776 | switch (c) { | |
777 | case 'y': | |
778 | handler.on_short_year(numeric_system::alternative); | |
779 | break; | |
780 | case 'm': | |
781 | handler.on_dec_month(numeric_system::alternative); | |
782 | break; | |
783 | case 'U': | |
784 | handler.on_dec0_week_of_year(numeric_system::alternative); | |
785 | break; | |
786 | case 'W': | |
787 | handler.on_dec1_week_of_year(numeric_system::alternative); | |
788 | break; | |
789 | case 'V': | |
790 | handler.on_iso_week_of_year(numeric_system::alternative); | |
791 | break; | |
792 | case 'd': | |
793 | handler.on_day_of_month(numeric_system::alternative); | |
794 | break; | |
795 | case 'e': | |
796 | handler.on_day_of_month_space(numeric_system::alternative); | |
797 | break; | |
798 | case 'w': | |
799 | handler.on_dec0_weekday(numeric_system::alternative); | |
800 | break; | |
801 | case 'u': | |
802 | handler.on_dec1_weekday(numeric_system::alternative); | |
803 | break; | |
804 | case 'H': | |
805 | handler.on_24_hour(numeric_system::alternative); | |
806 | break; | |
807 | case 'I': | |
808 | handler.on_12_hour(numeric_system::alternative); | |
809 | break; | |
810 | case 'M': | |
811 | handler.on_minute(numeric_system::alternative); | |
812 | break; | |
813 | case 'S': | |
814 | handler.on_second(numeric_system::alternative); | |
815 | break; | |
816 | default: | |
817 | FMT_THROW(format_error("invalid format")); | |
818 | } | |
819 | break; | |
820 | default: | |
821 | FMT_THROW(format_error("invalid format")); | |
822 | } | |
823 | begin = ptr; | |
824 | } | |
825 | if (begin != ptr) handler.on_text(begin, ptr); | |
826 | return ptr; | |
827 | } | |
828 | ||
829 | template <typename Derived> struct null_chrono_spec_handler { | |
830 | FMT_CONSTEXPR void unsupported() { | |
831 | static_cast<Derived*>(this)->unsupported(); | |
832 | } | |
833 | FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); } | |
834 | FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); } | |
835 | FMT_CONSTEXPR void on_offset_year() { unsupported(); } | |
836 | FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); } | |
837 | FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); } | |
838 | FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); } | |
839 | FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); } | |
840 | FMT_CONSTEXPR void on_full_weekday() { unsupported(); } | |
841 | FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); } | |
842 | FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); } | |
843 | FMT_CONSTEXPR void on_abbr_month() { unsupported(); } | |
844 | FMT_CONSTEXPR void on_full_month() { unsupported(); } | |
845 | FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); } | |
846 | FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); } | |
847 | FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); } | |
848 | FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); } | |
849 | FMT_CONSTEXPR void on_day_of_year() { unsupported(); } | |
850 | FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); } | |
851 | FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); } | |
852 | FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); } | |
853 | FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); } | |
854 | FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); } | |
855 | FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); } | |
856 | FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); } | |
857 | FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); } | |
858 | FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); } | |
859 | FMT_CONSTEXPR void on_us_date() { unsupported(); } | |
860 | FMT_CONSTEXPR void on_iso_date() { unsupported(); } | |
861 | FMT_CONSTEXPR void on_12_hour_time() { unsupported(); } | |
862 | FMT_CONSTEXPR void on_24_hour_time() { unsupported(); } | |
863 | FMT_CONSTEXPR void on_iso_time() { unsupported(); } | |
864 | FMT_CONSTEXPR void on_am_pm() { unsupported(); } | |
865 | FMT_CONSTEXPR void on_duration_value() { unsupported(); } | |
866 | FMT_CONSTEXPR void on_duration_unit() { unsupported(); } | |
867 | FMT_CONSTEXPR void on_utc_offset() { unsupported(); } | |
868 | FMT_CONSTEXPR void on_tz_name() { unsupported(); } | |
869 | }; | |
870 | ||
871 | struct tm_format_checker : null_chrono_spec_handler<tm_format_checker> { | |
872 | FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); } | |
873 | ||
874 | template <typename Char> | |
875 | FMT_CONSTEXPR void on_text(const Char*, const Char*) {} | |
876 | FMT_CONSTEXPR void on_year(numeric_system) {} | |
877 | FMT_CONSTEXPR void on_short_year(numeric_system) {} | |
878 | FMT_CONSTEXPR void on_offset_year() {} | |
879 | FMT_CONSTEXPR void on_century(numeric_system) {} | |
880 | FMT_CONSTEXPR void on_iso_week_based_year() {} | |
881 | FMT_CONSTEXPR void on_iso_week_based_short_year() {} | |
882 | FMT_CONSTEXPR void on_abbr_weekday() {} | |
883 | FMT_CONSTEXPR void on_full_weekday() {} | |
884 | FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {} | |
885 | FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {} | |
886 | FMT_CONSTEXPR void on_abbr_month() {} | |
887 | FMT_CONSTEXPR void on_full_month() {} | |
888 | FMT_CONSTEXPR void on_dec_month(numeric_system) {} | |
889 | FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {} | |
890 | FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {} | |
891 | FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {} | |
892 | FMT_CONSTEXPR void on_day_of_year() {} | |
893 | FMT_CONSTEXPR void on_day_of_month(numeric_system) {} | |
894 | FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {} | |
895 | FMT_CONSTEXPR void on_24_hour(numeric_system) {} | |
896 | FMT_CONSTEXPR void on_12_hour(numeric_system) {} | |
897 | FMT_CONSTEXPR void on_minute(numeric_system) {} | |
898 | FMT_CONSTEXPR void on_second(numeric_system) {} | |
899 | FMT_CONSTEXPR void on_datetime(numeric_system) {} | |
900 | FMT_CONSTEXPR void on_loc_date(numeric_system) {} | |
901 | FMT_CONSTEXPR void on_loc_time(numeric_system) {} | |
902 | FMT_CONSTEXPR void on_us_date() {} | |
903 | FMT_CONSTEXPR void on_iso_date() {} | |
904 | FMT_CONSTEXPR void on_12_hour_time() {} | |
905 | FMT_CONSTEXPR void on_24_hour_time() {} | |
906 | FMT_CONSTEXPR void on_iso_time() {} | |
907 | FMT_CONSTEXPR void on_am_pm() {} | |
908 | FMT_CONSTEXPR void on_utc_offset() {} | |
909 | FMT_CONSTEXPR void on_tz_name() {} | |
910 | }; | |
911 | ||
912 | inline const char* tm_wday_full_name(int wday) { | |
913 | static constexpr const char* full_name_list[] = { | |
914 | "Sunday", "Monday", "Tuesday", "Wednesday", | |
915 | "Thursday", "Friday", "Saturday"}; | |
916 | return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?"; | |
917 | } | |
918 | inline const char* tm_wday_short_name(int wday) { | |
919 | static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed", | |
920 | "Thu", "Fri", "Sat"}; | |
921 | return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???"; | |
922 | } | |
923 | ||
924 | inline const char* tm_mon_full_name(int mon) { | |
925 | static constexpr const char* full_name_list[] = { | |
926 | "January", "February", "March", "April", "May", "June", | |
927 | "July", "August", "September", "October", "November", "December"}; | |
928 | return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?"; | |
929 | } | |
930 | inline const char* tm_mon_short_name(int mon) { | |
931 | static constexpr const char* short_name_list[] = { | |
932 | "Jan", "Feb", "Mar", "Apr", "May", "Jun", | |
933 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", | |
934 | }; | |
935 | return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???"; | |
936 | } | |
937 | ||
938 | template <typename T, typename = void> | |
939 | struct has_member_data_tm_gmtoff : std::false_type {}; | |
940 | template <typename T> | |
941 | struct has_member_data_tm_gmtoff<T, void_t<decltype(T::tm_gmtoff)>> | |
942 | : std::true_type {}; | |
943 | ||
944 | template <typename T, typename = void> | |
945 | struct has_member_data_tm_zone : std::false_type {}; | |
946 | template <typename T> | |
947 | struct has_member_data_tm_zone<T, void_t<decltype(T::tm_zone)>> | |
948 | : std::true_type {}; | |
949 | ||
950 | #if FMT_USE_TZSET | |
951 | inline void tzset_once() { | |
952 | static bool init = []() -> bool { | |
953 | _tzset(); | |
954 | return true; | |
955 | }(); | |
956 | ignore_unused(init); | |
957 | } | |
958 | #endif | |
959 | ||
960 | template <typename OutputIt, typename Char> class tm_writer { | |
961 | private: | |
962 | static constexpr int days_per_week = 7; | |
963 | ||
964 | const std::locale& loc_; | |
965 | const bool is_classic_; | |
966 | OutputIt out_; | |
967 | const std::tm& tm_; | |
968 | ||
969 | auto tm_sec() const noexcept -> int { | |
970 | FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, ""); | |
971 | return tm_.tm_sec; | |
972 | } | |
973 | auto tm_min() const noexcept -> int { | |
974 | FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, ""); | |
975 | return tm_.tm_min; | |
976 | } | |
977 | auto tm_hour() const noexcept -> int { | |
978 | FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, ""); | |
979 | return tm_.tm_hour; | |
980 | } | |
981 | auto tm_mday() const noexcept -> int { | |
982 | FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, ""); | |
983 | return tm_.tm_mday; | |
984 | } | |
985 | auto tm_mon() const noexcept -> int { | |
986 | FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, ""); | |
987 | return tm_.tm_mon; | |
988 | } | |
989 | auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; } | |
990 | auto tm_wday() const noexcept -> int { | |
991 | FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, ""); | |
992 | return tm_.tm_wday; | |
993 | } | |
994 | auto tm_yday() const noexcept -> int { | |
995 | FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, ""); | |
996 | return tm_.tm_yday; | |
997 | } | |
998 | ||
999 | auto tm_hour12() const noexcept -> int { | |
1000 | const auto h = tm_hour(); | |
1001 | const auto z = h < 12 ? h : h - 12; | |
1002 | return z == 0 ? 12 : z; | |
1003 | } | |
1004 | ||
1005 | // POSIX and the C Standard are unclear or inconsistent about what %C and %y | |
1006 | // do if the year is negative or exceeds 9999. Use the convention that %C | |
1007 | // concatenated with %y yields the same output as %Y, and that %Y contains at | |
1008 | // least 4 characters, with more only if necessary. | |
1009 | auto split_year_lower(long long year) const noexcept -> int { | |
1010 | auto l = year % 100; | |
1011 | if (l < 0) l = -l; // l in [0, 99] | |
1012 | return static_cast<int>(l); | |
1013 | } | |
1014 | ||
1015 | // Algorithm: | |
1016 | // https://en.wikipedia.org/wiki/ISO_week_date#Calculating_the_week_number_from_a_month_and_day_of_the_month_or_ordinal_date | |
1017 | auto iso_year_weeks(long long curr_year) const noexcept -> int { | |
1018 | const auto prev_year = curr_year - 1; | |
1019 | const auto curr_p = | |
1020 | (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) % | |
1021 | days_per_week; | |
1022 | const auto prev_p = | |
1023 | (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) % | |
1024 | days_per_week; | |
1025 | return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0); | |
1026 | } | |
1027 | auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int { | |
1028 | return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) / | |
1029 | days_per_week; | |
1030 | } | |
1031 | auto tm_iso_week_year() const noexcept -> long long { | |
1032 | const auto year = tm_year(); | |
1033 | const auto w = iso_week_num(tm_yday(), tm_wday()); | |
1034 | if (w < 1) return year - 1; | |
1035 | if (w > iso_year_weeks(year)) return year + 1; | |
1036 | return year; | |
1037 | } | |
1038 | auto tm_iso_week_of_year() const noexcept -> int { | |
1039 | const auto year = tm_year(); | |
1040 | const auto w = iso_week_num(tm_yday(), tm_wday()); | |
1041 | if (w < 1) return iso_year_weeks(year - 1); | |
1042 | if (w > iso_year_weeks(year)) return 1; | |
1043 | return w; | |
1044 | } | |
1045 | ||
1046 | void write1(int value) { | |
1047 | *out_++ = static_cast<char>('0' + to_unsigned(value) % 10); | |
1048 | } | |
1049 | void write2(int value) { | |
1050 | const char* d = digits2(to_unsigned(value) % 100); | |
1051 | *out_++ = *d++; | |
1052 | *out_++ = *d; | |
1053 | } | |
1054 | ||
1055 | void write_year_extended(long long year) { | |
1056 | // At least 4 characters. | |
1057 | int width = 4; | |
1058 | if (year < 0) { | |
1059 | *out_++ = '-'; | |
1060 | year = 0 - year; | |
1061 | --width; | |
1062 | } | |
1063 | uint32_or_64_or_128_t<long long> n = to_unsigned(year); | |
1064 | const int num_digits = count_digits(n); | |
1065 | if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0'); | |
1066 | out_ = format_decimal<Char>(out_, n, num_digits).end; | |
1067 | } | |
1068 | void write_year(long long year) { | |
1069 | if (year >= 0 && year < 10000) { | |
1070 | write2(static_cast<int>(year / 100)); | |
1071 | write2(static_cast<int>(year % 100)); | |
1072 | } else { | |
1073 | write_year_extended(year); | |
1074 | } | |
1075 | } | |
1076 | ||
1077 | void write_utc_offset(long offset) { | |
1078 | if (offset < 0) { | |
1079 | *out_++ = '-'; | |
1080 | offset = -offset; | |
1081 | } else { | |
1082 | *out_++ = '+'; | |
1083 | } | |
1084 | offset /= 60; | |
1085 | write2(static_cast<int>(offset / 60)); | |
1086 | write2(static_cast<int>(offset % 60)); | |
1087 | } | |
1088 | template <typename T, FMT_ENABLE_IF(has_member_data_tm_gmtoff<T>::value)> | |
1089 | void format_utc_offset_impl(const T& tm) { | |
1090 | write_utc_offset(tm.tm_gmtoff); | |
1091 | } | |
1092 | template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)> | |
1093 | void format_utc_offset_impl(const T& tm) { | |
1094 | #if defined(_WIN32) && defined(_UCRT) | |
1095 | # if FMT_USE_TZSET | |
1096 | tzset_once(); | |
1097 | # endif | |
1098 | long offset = 0; | |
1099 | _get_timezone(&offset); | |
1100 | if (tm.tm_isdst) { | |
1101 | long dstbias = 0; | |
1102 | _get_dstbias(&dstbias); | |
1103 | offset += dstbias; | |
1104 | } | |
1105 | write_utc_offset(-offset); | |
1106 | #else | |
1107 | ignore_unused(tm); | |
1108 | format_localized('z'); | |
1109 | #endif | |
1110 | } | |
1111 | ||
1112 | template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)> | |
1113 | void format_tz_name_impl(const T& tm) { | |
1114 | if (is_classic_) | |
1115 | out_ = write_tm_str<Char>(out_, tm.tm_zone, loc_); | |
1116 | else | |
1117 | format_localized('Z'); | |
1118 | } | |
1119 | template <typename T, FMT_ENABLE_IF(!has_member_data_tm_zone<T>::value)> | |
1120 | void format_tz_name_impl(const T&) { | |
1121 | format_localized('Z'); | |
1122 | } | |
1123 | ||
1124 | void format_localized(char format, char modifier = 0) { | |
1125 | out_ = write<Char>(out_, tm_, loc_, format, modifier); | |
1126 | } | |
1127 | ||
1128 | public: | |
1129 | tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm) | |
1130 | : loc_(loc), | |
1131 | is_classic_(loc_ == get_classic_locale()), | |
1132 | out_(out), | |
1133 | tm_(tm) {} | |
1134 | ||
1135 | OutputIt out() const { return out_; } | |
1136 | ||
1137 | FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) { | |
1138 | out_ = copy_str<Char>(begin, end, out_); | |
1139 | } | |
1140 | ||
1141 | void on_abbr_weekday() { | |
1142 | if (is_classic_) | |
1143 | out_ = write(out_, tm_wday_short_name(tm_wday())); | |
1144 | else | |
1145 | format_localized('a'); | |
1146 | } | |
1147 | void on_full_weekday() { | |
1148 | if (is_classic_) | |
1149 | out_ = write(out_, tm_wday_full_name(tm_wday())); | |
1150 | else | |
1151 | format_localized('A'); | |
1152 | } | |
1153 | void on_dec0_weekday(numeric_system ns) { | |
1154 | if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday()); | |
1155 | format_localized('w', 'O'); | |
1156 | } | |
1157 | void on_dec1_weekday(numeric_system ns) { | |
1158 | if (is_classic_ || ns == numeric_system::standard) { | |
1159 | auto wday = tm_wday(); | |
1160 | write1(wday == 0 ? days_per_week : wday); | |
1161 | } else { | |
1162 | format_localized('u', 'O'); | |
1163 | } | |
1164 | } | |
1165 | ||
1166 | void on_abbr_month() { | |
1167 | if (is_classic_) | |
1168 | out_ = write(out_, tm_mon_short_name(tm_mon())); | |
1169 | else | |
1170 | format_localized('b'); | |
1171 | } | |
1172 | void on_full_month() { | |
1173 | if (is_classic_) | |
1174 | out_ = write(out_, tm_mon_full_name(tm_mon())); | |
1175 | else | |
1176 | format_localized('B'); | |
1177 | } | |
1178 | ||
1179 | void on_datetime(numeric_system ns) { | |
1180 | if (is_classic_) { | |
1181 | on_abbr_weekday(); | |
1182 | *out_++ = ' '; | |
1183 | on_abbr_month(); | |
1184 | *out_++ = ' '; | |
1185 | on_day_of_month_space(numeric_system::standard); | |
1186 | *out_++ = ' '; | |
1187 | on_iso_time(); | |
1188 | *out_++ = ' '; | |
1189 | on_year(numeric_system::standard); | |
1190 | } else { | |
1191 | format_localized('c', ns == numeric_system::standard ? '\0' : 'E'); | |
1192 | } | |
1193 | } | |
1194 | void on_loc_date(numeric_system ns) { | |
1195 | if (is_classic_) | |
1196 | on_us_date(); | |
1197 | else | |
1198 | format_localized('x', ns == numeric_system::standard ? '\0' : 'E'); | |
1199 | } | |
1200 | void on_loc_time(numeric_system ns) { | |
1201 | if (is_classic_) | |
1202 | on_iso_time(); | |
1203 | else | |
1204 | format_localized('X', ns == numeric_system::standard ? '\0' : 'E'); | |
1205 | } | |
1206 | void on_us_date() { | |
1207 | char buf[8]; | |
1208 | write_digit2_separated(buf, to_unsigned(tm_mon() + 1), | |
1209 | to_unsigned(tm_mday()), | |
1210 | to_unsigned(split_year_lower(tm_year())), '/'); | |
1211 | out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_); | |
1212 | } | |
1213 | void on_iso_date() { | |
1214 | auto year = tm_year(); | |
1215 | char buf[10]; | |
1216 | size_t offset = 0; | |
1217 | if (year >= 0 && year < 10000) { | |
8b75cd77 | 1218 | copy2(buf, digits2(static_cast<size_t>(year / 100))); |
05aa7e19 JG |
1219 | } else { |
1220 | offset = 4; | |
1221 | write_year_extended(year); | |
1222 | year = 0; | |
1223 | } | |
1224 | write_digit2_separated(buf + 2, static_cast<unsigned>(year % 100), | |
1225 | to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()), | |
1226 | '-'); | |
1227 | out_ = copy_str<Char>(std::begin(buf) + offset, std::end(buf), out_); | |
1228 | } | |
1229 | ||
1230 | void on_utc_offset() { format_utc_offset_impl(tm_); } | |
1231 | void on_tz_name() { format_tz_name_impl(tm_); } | |
1232 | ||
1233 | void on_year(numeric_system ns) { | |
1234 | if (is_classic_ || ns == numeric_system::standard) | |
1235 | return write_year(tm_year()); | |
1236 | format_localized('Y', 'E'); | |
1237 | } | |
1238 | void on_short_year(numeric_system ns) { | |
1239 | if (is_classic_ || ns == numeric_system::standard) | |
1240 | return write2(split_year_lower(tm_year())); | |
1241 | format_localized('y', 'O'); | |
1242 | } | |
1243 | void on_offset_year() { | |
1244 | if (is_classic_) return write2(split_year_lower(tm_year())); | |
1245 | format_localized('y', 'E'); | |
1246 | } | |
1247 | ||
1248 | void on_century(numeric_system ns) { | |
1249 | if (is_classic_ || ns == numeric_system::standard) { | |
1250 | auto year = tm_year(); | |
1251 | auto upper = year / 100; | |
1252 | if (year >= -99 && year < 0) { | |
1253 | // Zero upper on negative year. | |
1254 | *out_++ = '-'; | |
1255 | *out_++ = '0'; | |
1256 | } else if (upper >= 0 && upper < 100) { | |
1257 | write2(static_cast<int>(upper)); | |
1258 | } else { | |
1259 | out_ = write<Char>(out_, upper); | |
1260 | } | |
1261 | } else { | |
1262 | format_localized('C', 'E'); | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | void on_dec_month(numeric_system ns) { | |
1267 | if (is_classic_ || ns == numeric_system::standard) | |
1268 | return write2(tm_mon() + 1); | |
1269 | format_localized('m', 'O'); | |
1270 | } | |
1271 | ||
1272 | void on_dec0_week_of_year(numeric_system ns) { | |
1273 | if (is_classic_ || ns == numeric_system::standard) | |
1274 | return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week); | |
1275 | format_localized('U', 'O'); | |
1276 | } | |
1277 | void on_dec1_week_of_year(numeric_system ns) { | |
1278 | if (is_classic_ || ns == numeric_system::standard) { | |
1279 | auto wday = tm_wday(); | |
1280 | write2((tm_yday() + days_per_week - | |
1281 | (wday == 0 ? (days_per_week - 1) : (wday - 1))) / | |
1282 | days_per_week); | |
1283 | } else { | |
1284 | format_localized('W', 'O'); | |
1285 | } | |
1286 | } | |
1287 | void on_iso_week_of_year(numeric_system ns) { | |
1288 | if (is_classic_ || ns == numeric_system::standard) | |
1289 | return write2(tm_iso_week_of_year()); | |
1290 | format_localized('V', 'O'); | |
1291 | } | |
1292 | ||
1293 | void on_iso_week_based_year() { write_year(tm_iso_week_year()); } | |
1294 | void on_iso_week_based_short_year() { | |
1295 | write2(split_year_lower(tm_iso_week_year())); | |
1296 | } | |
1297 | ||
1298 | void on_day_of_year() { | |
1299 | auto yday = tm_yday() + 1; | |
1300 | write1(yday / 100); | |
1301 | write2(yday % 100); | |
1302 | } | |
1303 | void on_day_of_month(numeric_system ns) { | |
1304 | if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday()); | |
1305 | format_localized('d', 'O'); | |
1306 | } | |
1307 | void on_day_of_month_space(numeric_system ns) { | |
1308 | if (is_classic_ || ns == numeric_system::standard) { | |
1309 | auto mday = to_unsigned(tm_mday()) % 100; | |
1310 | const char* d2 = digits2(mday); | |
1311 | *out_++ = mday < 10 ? ' ' : d2[0]; | |
1312 | *out_++ = d2[1]; | |
1313 | } else { | |
1314 | format_localized('e', 'O'); | |
1315 | } | |
1316 | } | |
1317 | ||
1318 | void on_24_hour(numeric_system ns) { | |
1319 | if (is_classic_ || ns == numeric_system::standard) return write2(tm_hour()); | |
1320 | format_localized('H', 'O'); | |
1321 | } | |
1322 | void on_12_hour(numeric_system ns) { | |
1323 | if (is_classic_ || ns == numeric_system::standard) | |
1324 | return write2(tm_hour12()); | |
1325 | format_localized('I', 'O'); | |
1326 | } | |
1327 | void on_minute(numeric_system ns) { | |
1328 | if (is_classic_ || ns == numeric_system::standard) return write2(tm_min()); | |
1329 | format_localized('M', 'O'); | |
1330 | } | |
1331 | void on_second(numeric_system ns) { | |
1332 | if (is_classic_ || ns == numeric_system::standard) return write2(tm_sec()); | |
1333 | format_localized('S', 'O'); | |
1334 | } | |
1335 | ||
1336 | void on_12_hour_time() { | |
1337 | if (is_classic_) { | |
1338 | char buf[8]; | |
1339 | write_digit2_separated(buf, to_unsigned(tm_hour12()), | |
1340 | to_unsigned(tm_min()), to_unsigned(tm_sec()), ':'); | |
1341 | out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_); | |
1342 | *out_++ = ' '; | |
1343 | on_am_pm(); | |
1344 | } else { | |
1345 | format_localized('r'); | |
1346 | } | |
1347 | } | |
1348 | void on_24_hour_time() { | |
1349 | write2(tm_hour()); | |
1350 | *out_++ = ':'; | |
1351 | write2(tm_min()); | |
1352 | } | |
1353 | void on_iso_time() { | |
1354 | char buf[8]; | |
1355 | write_digit2_separated(buf, to_unsigned(tm_hour()), to_unsigned(tm_min()), | |
1356 | to_unsigned(tm_sec()), ':'); | |
1357 | out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_); | |
1358 | } | |
1359 | ||
1360 | void on_am_pm() { | |
1361 | if (is_classic_) { | |
1362 | *out_++ = tm_hour() < 12 ? 'A' : 'P'; | |
1363 | *out_++ = 'M'; | |
1364 | } else { | |
1365 | format_localized('p'); | |
1366 | } | |
1367 | } | |
1368 | ||
1369 | // These apply to chrono durations but not tm. | |
1370 | void on_duration_value() {} | |
1371 | void on_duration_unit() {} | |
1372 | }; | |
1373 | ||
1374 | struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> { | |
1375 | FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); } | |
1376 | ||
1377 | template <typename Char> | |
1378 | FMT_CONSTEXPR void on_text(const Char*, const Char*) {} | |
1379 | FMT_CONSTEXPR void on_24_hour(numeric_system) {} | |
1380 | FMT_CONSTEXPR void on_12_hour(numeric_system) {} | |
1381 | FMT_CONSTEXPR void on_minute(numeric_system) {} | |
1382 | FMT_CONSTEXPR void on_second(numeric_system) {} | |
1383 | FMT_CONSTEXPR void on_12_hour_time() {} | |
1384 | FMT_CONSTEXPR void on_24_hour_time() {} | |
1385 | FMT_CONSTEXPR void on_iso_time() {} | |
1386 | FMT_CONSTEXPR void on_am_pm() {} | |
1387 | FMT_CONSTEXPR void on_duration_value() {} | |
1388 | FMT_CONSTEXPR void on_duration_unit() {} | |
1389 | }; | |
1390 | ||
05aa7e19 JG |
1391 | template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)> |
1392 | inline bool isfinite(T) { | |
1393 | return true; | |
1394 | } | |
1395 | ||
1396 | // Converts value to Int and checks that it's in the range [0, upper). | |
1397 | template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)> | |
1398 | inline Int to_nonnegative_int(T value, Int upper) { | |
8b75cd77 JG |
1399 | FMT_ASSERT(std::is_unsigned<Int>::value || |
1400 | (value >= 0 && to_unsigned(value) <= to_unsigned(upper)), | |
05aa7e19 JG |
1401 | "invalid value"); |
1402 | (void)upper; | |
1403 | return static_cast<Int>(value); | |
1404 | } | |
1405 | template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)> | |
1406 | inline Int to_nonnegative_int(T value, Int upper) { | |
1407 | if (value < 0 || value > static_cast<T>(upper)) | |
1408 | FMT_THROW(format_error("invalid value")); | |
1409 | return static_cast<Int>(value); | |
1410 | } | |
1411 | ||
1412 | template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)> | |
1413 | inline T mod(T x, int y) { | |
1414 | return x % static_cast<T>(y); | |
1415 | } | |
1416 | template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)> | |
1417 | inline T mod(T x, int y) { | |
1418 | return std::fmod(x, static_cast<T>(y)); | |
1419 | } | |
1420 | ||
1421 | // If T is an integral type, maps T to its unsigned counterpart, otherwise | |
1422 | // leaves it unchanged (unlike std::make_unsigned). | |
1423 | template <typename T, bool INTEGRAL = std::is_integral<T>::value> | |
1424 | struct make_unsigned_or_unchanged { | |
1425 | using type = T; | |
1426 | }; | |
1427 | ||
1428 | template <typename T> struct make_unsigned_or_unchanged<T, true> { | |
1429 | using type = typename std::make_unsigned<T>::type; | |
1430 | }; | |
1431 | ||
1432 | #if FMT_SAFE_DURATION_CAST | |
1433 | // throwing version of safe_duration_cast | |
1434 | template <typename To, typename FromRep, typename FromPeriod> | |
1435 | To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) { | |
1436 | int ec; | |
1437 | To to = safe_duration_cast::safe_duration_cast<To>(from, ec); | |
1438 | if (ec) FMT_THROW(format_error("cannot format duration")); | |
1439 | return to; | |
1440 | } | |
1441 | #endif | |
1442 | ||
1443 | template <typename Rep, typename Period, | |
1444 | FMT_ENABLE_IF(std::is_integral<Rep>::value)> | |
1445 | inline std::chrono::duration<Rep, std::milli> get_milliseconds( | |
1446 | std::chrono::duration<Rep, Period> d) { | |
1447 | // this may overflow and/or the result may not fit in the | |
1448 | // target type. | |
1449 | #if FMT_SAFE_DURATION_CAST | |
1450 | using CommonSecondsType = | |
1451 | typename std::common_type<decltype(d), std::chrono::seconds>::type; | |
1452 | const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d); | |
1453 | const auto d_as_whole_seconds = | |
1454 | fmt_safe_duration_cast<std::chrono::seconds>(d_as_common); | |
1455 | // this conversion should be nonproblematic | |
1456 | const auto diff = d_as_common - d_as_whole_seconds; | |
1457 | const auto ms = | |
1458 | fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff); | |
1459 | return ms; | |
1460 | #else | |
1461 | auto s = std::chrono::duration_cast<std::chrono::seconds>(d); | |
1462 | return std::chrono::duration_cast<std::chrono::milliseconds>(d - s); | |
1463 | #endif | |
1464 | } | |
1465 | ||
8b75cd77 | 1466 | // Counts the number of fractional digits in the range [0, 18] according to the |
05aa7e19 JG |
1467 | // C++20 spec. If more than 18 fractional digits are required then returns 6 for |
1468 | // microseconds precision. | |
8b75cd77 JG |
1469 | template <long long Num, long long Den, int N = 0, |
1470 | bool Enabled = (N < 19) && (Num <= max_value<long long>() / 10)> | |
1471 | struct count_fractional_digits { | |
1472 | static constexpr int value = | |
1473 | Num % Den == 0 ? N : count_fractional_digits<Num * 10, Den, N + 1>::value; | |
1474 | }; | |
1475 | ||
1476 | // Base case that doesn't instantiate any more templates | |
1477 | // in order to avoid overflow. | |
1478 | template <long long Num, long long Den, int N> | |
1479 | struct count_fractional_digits<Num, Den, N, false> { | |
1480 | static constexpr int value = (Num % Den == 0) ? N : 6; | |
1481 | }; | |
05aa7e19 JG |
1482 | |
1483 | constexpr long long pow10(std::uint32_t n) { | |
1484 | return n == 0 ? 1 : 10 * pow10(n - 1); | |
1485 | } | |
1486 | ||
1487 | template <class Rep, class Period, | |
1488 | FMT_ENABLE_IF(std::numeric_limits<Rep>::is_signed)> | |
1489 | constexpr std::chrono::duration<Rep, Period> abs( | |
1490 | std::chrono::duration<Rep, Period> d) { | |
1491 | // We need to compare the duration using the count() method directly | |
1492 | // due to a compiler bug in clang-11 regarding the spaceship operator, | |
1493 | // when -Wzero-as-null-pointer-constant is enabled. | |
1494 | // In clang-12 the bug has been fixed. See | |
1495 | // https://bugs.llvm.org/show_bug.cgi?id=46235 and the reproducible example: | |
1496 | // https://www.godbolt.org/z/Knbb5joYx. | |
1497 | return d.count() >= d.zero().count() ? d : -d; | |
1498 | } | |
1499 | ||
1500 | template <class Rep, class Period, | |
1501 | FMT_ENABLE_IF(!std::numeric_limits<Rep>::is_signed)> | |
1502 | constexpr std::chrono::duration<Rep, Period> abs( | |
1503 | std::chrono::duration<Rep, Period> d) { | |
1504 | return d; | |
1505 | } | |
1506 | ||
1507 | template <typename Char, typename Rep, typename OutputIt, | |
1508 | FMT_ENABLE_IF(std::is_integral<Rep>::value)> | |
1509 | OutputIt format_duration_value(OutputIt out, Rep val, int) { | |
1510 | return write<Char>(out, val); | |
1511 | } | |
1512 | ||
1513 | template <typename Char, typename Rep, typename OutputIt, | |
1514 | FMT_ENABLE_IF(std::is_floating_point<Rep>::value)> | |
1515 | OutputIt format_duration_value(OutputIt out, Rep val, int precision) { | |
1516 | auto specs = basic_format_specs<Char>(); | |
1517 | specs.precision = precision; | |
1518 | specs.type = precision >= 0 ? presentation_type::fixed_lower | |
1519 | : presentation_type::general_lower; | |
1520 | return write<Char>(out, val, specs); | |
1521 | } | |
1522 | ||
1523 | template <typename Char, typename OutputIt> | |
1524 | OutputIt copy_unit(string_view unit, OutputIt out, Char) { | |
1525 | return std::copy(unit.begin(), unit.end(), out); | |
1526 | } | |
1527 | ||
1528 | template <typename OutputIt> | |
1529 | OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) { | |
1530 | // This works when wchar_t is UTF-32 because units only contain characters | |
1531 | // that have the same representation in UTF-16 and UTF-32. | |
1532 | utf8_to_utf16 u(unit); | |
1533 | return std::copy(u.c_str(), u.c_str() + u.size(), out); | |
1534 | } | |
1535 | ||
1536 | template <typename Char, typename Period, typename OutputIt> | |
1537 | OutputIt format_duration_unit(OutputIt out) { | |
1538 | if (const char* unit = get_units<Period>()) | |
1539 | return copy_unit(string_view(unit), out, Char()); | |
1540 | *out++ = '['; | |
1541 | out = write<Char>(out, Period::num); | |
1542 | if (const_check(Period::den != 1)) { | |
1543 | *out++ = '/'; | |
1544 | out = write<Char>(out, Period::den); | |
1545 | } | |
1546 | *out++ = ']'; | |
1547 | *out++ = 's'; | |
1548 | return out; | |
1549 | } | |
1550 | ||
1551 | class get_locale { | |
1552 | private: | |
1553 | union { | |
1554 | std::locale locale_; | |
1555 | }; | |
1556 | bool has_locale_ = false; | |
1557 | ||
1558 | public: | |
1559 | get_locale(bool localized, locale_ref loc) : has_locale_(localized) { | |
1560 | if (localized) | |
1561 | ::new (&locale_) std::locale(loc.template get<std::locale>()); | |
1562 | } | |
1563 | ~get_locale() { | |
1564 | if (has_locale_) locale_.~locale(); | |
1565 | } | |
1566 | operator const std::locale&() const { | |
1567 | return has_locale_ ? locale_ : get_classic_locale(); | |
1568 | } | |
1569 | }; | |
1570 | ||
1571 | template <typename FormatContext, typename OutputIt, typename Rep, | |
1572 | typename Period> | |
1573 | struct chrono_formatter { | |
1574 | FormatContext& context; | |
1575 | OutputIt out; | |
1576 | int precision; | |
1577 | bool localized = false; | |
1578 | // rep is unsigned to avoid overflow. | |
1579 | using rep = | |
1580 | conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int), | |
1581 | unsigned, typename make_unsigned_or_unchanged<Rep>::type>; | |
1582 | rep val; | |
1583 | using seconds = std::chrono::duration<rep>; | |
1584 | seconds s; | |
1585 | using milliseconds = std::chrono::duration<rep, std::milli>; | |
1586 | bool negative; | |
1587 | ||
1588 | using char_type = typename FormatContext::char_type; | |
1589 | using tm_writer_type = tm_writer<OutputIt, char_type>; | |
1590 | ||
1591 | chrono_formatter(FormatContext& ctx, OutputIt o, | |
1592 | std::chrono::duration<Rep, Period> d) | |
1593 | : context(ctx), | |
1594 | out(o), | |
1595 | val(static_cast<rep>(d.count())), | |
1596 | negative(false) { | |
1597 | if (d.count() < 0) { | |
1598 | val = 0 - val; | |
1599 | negative = true; | |
1600 | } | |
1601 | ||
1602 | // this may overflow and/or the result may not fit in the | |
1603 | // target type. | |
1604 | #if FMT_SAFE_DURATION_CAST | |
1605 | // might need checked conversion (rep!=Rep) | |
1606 | auto tmpval = std::chrono::duration<rep, Period>(val); | |
1607 | s = fmt_safe_duration_cast<seconds>(tmpval); | |
1608 | #else | |
1609 | s = std::chrono::duration_cast<seconds>( | |
1610 | std::chrono::duration<rep, Period>(val)); | |
1611 | #endif | |
1612 | } | |
1613 | ||
1614 | // returns true if nan or inf, writes to out. | |
1615 | bool handle_nan_inf() { | |
1616 | if (isfinite(val)) { | |
1617 | return false; | |
1618 | } | |
1619 | if (isnan(val)) { | |
1620 | write_nan(); | |
1621 | return true; | |
1622 | } | |
1623 | // must be +-inf | |
1624 | if (val > 0) { | |
1625 | write_pinf(); | |
1626 | } else { | |
1627 | write_ninf(); | |
1628 | } | |
1629 | return true; | |
1630 | } | |
1631 | ||
1632 | Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); } | |
1633 | ||
1634 | Rep hour12() const { | |
1635 | Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12)); | |
1636 | return hour <= 0 ? 12 : hour; | |
1637 | } | |
1638 | ||
1639 | Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); } | |
1640 | Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); } | |
1641 | ||
1642 | std::tm time() const { | |
1643 | auto time = std::tm(); | |
1644 | time.tm_hour = to_nonnegative_int(hour(), 24); | |
1645 | time.tm_min = to_nonnegative_int(minute(), 60); | |
1646 | time.tm_sec = to_nonnegative_int(second(), 60); | |
1647 | return time; | |
1648 | } | |
1649 | ||
1650 | void write_sign() { | |
1651 | if (negative) { | |
1652 | *out++ = '-'; | |
1653 | negative = false; | |
1654 | } | |
1655 | } | |
1656 | ||
1657 | void write(Rep value, int width) { | |
1658 | write_sign(); | |
1659 | if (isnan(value)) return write_nan(); | |
1660 | uint32_or_64_or_128_t<int> n = | |
1661 | to_unsigned(to_nonnegative_int(value, max_value<int>())); | |
1662 | int num_digits = detail::count_digits(n); | |
1663 | if (width > num_digits) out = std::fill_n(out, width - num_digits, '0'); | |
1664 | out = format_decimal<char_type>(out, n, num_digits).end; | |
1665 | } | |
1666 | ||
8b75cd77 JG |
1667 | template <typename Duration> void write_fractional_seconds(Duration d) { |
1668 | FMT_ASSERT(!std::is_floating_point<typename Duration::rep>::value, ""); | |
05aa7e19 | 1669 | constexpr auto num_fractional_digits = |
8b75cd77 JG |
1670 | count_fractional_digits<Duration::period::num, |
1671 | Duration::period::den>::value; | |
05aa7e19 JG |
1672 | |
1673 | using subsecond_precision = std::chrono::duration< | |
1674 | typename std::common_type<typename Duration::rep, | |
1675 | std::chrono::seconds::rep>::type, | |
1676 | std::ratio<1, detail::pow10(num_fractional_digits)>>; | |
1677 | if (std::ratio_less<typename subsecond_precision::period, | |
1678 | std::chrono::seconds::period>::value) { | |
1679 | *out++ = '.'; | |
8b75cd77 JG |
1680 | auto fractional = |
1681 | detail::abs(d) - std::chrono::duration_cast<std::chrono::seconds>(d); | |
1682 | auto subseconds = | |
05aa7e19 JG |
1683 | std::chrono::treat_as_floating_point< |
1684 | typename subsecond_precision::rep>::value | |
1685 | ? fractional.count() | |
1686 | : std::chrono::duration_cast<subsecond_precision>(fractional) | |
1687 | .count(); | |
1688 | uint32_or_64_or_128_t<long long> n = | |
1689 | to_unsigned(to_nonnegative_int(subseconds, max_value<long long>())); | |
1690 | int num_digits = detail::count_digits(n); | |
1691 | if (num_fractional_digits > num_digits) | |
1692 | out = std::fill_n(out, num_fractional_digits - num_digits, '0'); | |
1693 | out = format_decimal<char_type>(out, n, num_digits).end; | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | void write_nan() { std::copy_n("nan", 3, out); } | |
1698 | void write_pinf() { std::copy_n("inf", 3, out); } | |
1699 | void write_ninf() { std::copy_n("-inf", 4, out); } | |
1700 | ||
1701 | template <typename Callback, typename... Args> | |
1702 | void format_tm(const tm& time, Callback cb, Args... args) { | |
1703 | if (isnan(val)) return write_nan(); | |
1704 | get_locale loc(localized, context.locale()); | |
1705 | auto w = tm_writer_type(loc, out, time); | |
1706 | (w.*cb)(args...); | |
1707 | out = w.out(); | |
1708 | } | |
1709 | ||
1710 | void on_text(const char_type* begin, const char_type* end) { | |
1711 | std::copy(begin, end, out); | |
1712 | } | |
1713 | ||
1714 | // These are not implemented because durations don't have date information. | |
1715 | void on_abbr_weekday() {} | |
1716 | void on_full_weekday() {} | |
1717 | void on_dec0_weekday(numeric_system) {} | |
1718 | void on_dec1_weekday(numeric_system) {} | |
1719 | void on_abbr_month() {} | |
1720 | void on_full_month() {} | |
1721 | void on_datetime(numeric_system) {} | |
1722 | void on_loc_date(numeric_system) {} | |
1723 | void on_loc_time(numeric_system) {} | |
1724 | void on_us_date() {} | |
1725 | void on_iso_date() {} | |
1726 | void on_utc_offset() {} | |
1727 | void on_tz_name() {} | |
1728 | void on_year(numeric_system) {} | |
1729 | void on_short_year(numeric_system) {} | |
1730 | void on_offset_year() {} | |
1731 | void on_century(numeric_system) {} | |
1732 | void on_iso_week_based_year() {} | |
1733 | void on_iso_week_based_short_year() {} | |
1734 | void on_dec_month(numeric_system) {} | |
1735 | void on_dec0_week_of_year(numeric_system) {} | |
1736 | void on_dec1_week_of_year(numeric_system) {} | |
1737 | void on_iso_week_of_year(numeric_system) {} | |
1738 | void on_day_of_year() {} | |
1739 | void on_day_of_month(numeric_system) {} | |
1740 | void on_day_of_month_space(numeric_system) {} | |
1741 | ||
1742 | void on_24_hour(numeric_system ns) { | |
1743 | if (handle_nan_inf()) return; | |
1744 | ||
1745 | if (ns == numeric_system::standard) return write(hour(), 2); | |
1746 | auto time = tm(); | |
1747 | time.tm_hour = to_nonnegative_int(hour(), 24); | |
1748 | format_tm(time, &tm_writer_type::on_24_hour, ns); | |
1749 | } | |
1750 | ||
1751 | void on_12_hour(numeric_system ns) { | |
1752 | if (handle_nan_inf()) return; | |
1753 | ||
1754 | if (ns == numeric_system::standard) return write(hour12(), 2); | |
1755 | auto time = tm(); | |
1756 | time.tm_hour = to_nonnegative_int(hour12(), 12); | |
1757 | format_tm(time, &tm_writer_type::on_12_hour, ns); | |
1758 | } | |
1759 | ||
1760 | void on_minute(numeric_system ns) { | |
1761 | if (handle_nan_inf()) return; | |
1762 | ||
1763 | if (ns == numeric_system::standard) return write(minute(), 2); | |
1764 | auto time = tm(); | |
1765 | time.tm_min = to_nonnegative_int(minute(), 60); | |
1766 | format_tm(time, &tm_writer_type::on_minute, ns); | |
1767 | } | |
1768 | ||
1769 | void on_second(numeric_system ns) { | |
1770 | if (handle_nan_inf()) return; | |
1771 | ||
1772 | if (ns == numeric_system::standard) { | |
8b75cd77 JG |
1773 | if (std::is_floating_point<rep>::value) { |
1774 | constexpr auto num_fractional_digits = | |
1775 | count_fractional_digits<Period::num, Period::den>::value; | |
1776 | auto buf = memory_buffer(); | |
1777 | format_to(std::back_inserter(buf), runtime("{:.{}f}"), | |
1778 | std::fmod(val * static_cast<rep>(Period::num) / | |
1779 | static_cast<rep>(Period::den), | |
1780 | static_cast<rep>(60)), | |
1781 | num_fractional_digits); | |
1782 | if (negative) *out++ = '-'; | |
1783 | if (buf.size() < 2 || buf[1] == '.') *out++ = '0'; | |
1784 | out = std::copy(buf.begin(), buf.end(), out); | |
1785 | } else { | |
1786 | write(second(), 2); | |
1787 | write_fractional_seconds(std::chrono::duration<rep, Period>(val)); | |
1788 | } | |
05aa7e19 JG |
1789 | return; |
1790 | } | |
1791 | auto time = tm(); | |
1792 | time.tm_sec = to_nonnegative_int(second(), 60); | |
1793 | format_tm(time, &tm_writer_type::on_second, ns); | |
1794 | } | |
1795 | ||
1796 | void on_12_hour_time() { | |
1797 | if (handle_nan_inf()) return; | |
1798 | format_tm(time(), &tm_writer_type::on_12_hour_time); | |
1799 | } | |
1800 | ||
1801 | void on_24_hour_time() { | |
1802 | if (handle_nan_inf()) { | |
1803 | *out++ = ':'; | |
1804 | handle_nan_inf(); | |
1805 | return; | |
1806 | } | |
1807 | ||
1808 | write(hour(), 2); | |
1809 | *out++ = ':'; | |
1810 | write(minute(), 2); | |
1811 | } | |
1812 | ||
1813 | void on_iso_time() { | |
1814 | on_24_hour_time(); | |
1815 | *out++ = ':'; | |
1816 | if (handle_nan_inf()) return; | |
1817 | on_second(numeric_system::standard); | |
1818 | } | |
1819 | ||
1820 | void on_am_pm() { | |
1821 | if (handle_nan_inf()) return; | |
1822 | format_tm(time(), &tm_writer_type::on_am_pm); | |
1823 | } | |
1824 | ||
1825 | void on_duration_value() { | |
1826 | if (handle_nan_inf()) return; | |
1827 | write_sign(); | |
1828 | out = format_duration_value<char_type>(out, val, precision); | |
1829 | } | |
1830 | ||
1831 | void on_duration_unit() { | |
1832 | out = format_duration_unit<char_type, Period>(out); | |
1833 | } | |
1834 | }; | |
1835 | ||
1836 | FMT_END_DETAIL_NAMESPACE | |
1837 | ||
1838 | #if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907 | |
1839 | using weekday = std::chrono::weekday; | |
1840 | #else | |
1841 | // A fallback version of weekday. | |
1842 | class weekday { | |
1843 | private: | |
1844 | unsigned char value; | |
1845 | ||
1846 | public: | |
1847 | weekday() = default; | |
1848 | explicit constexpr weekday(unsigned wd) noexcept | |
1849 | : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {} | |
1850 | constexpr unsigned c_encoding() const noexcept { return value; } | |
1851 | }; | |
1852 | ||
1853 | class year_month_day {}; | |
1854 | #endif | |
1855 | ||
1856 | // A rudimentary weekday formatter. | |
1857 | template <typename Char> struct formatter<weekday, Char> { | |
1858 | private: | |
1859 | bool localized = false; | |
1860 | ||
1861 | public: | |
1862 | FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx) | |
1863 | -> decltype(ctx.begin()) { | |
1864 | auto begin = ctx.begin(), end = ctx.end(); | |
1865 | if (begin != end && *begin == 'L') { | |
1866 | ++begin; | |
1867 | localized = true; | |
1868 | } | |
1869 | return begin; | |
1870 | } | |
1871 | ||
1872 | template <typename FormatContext> | |
1873 | auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) { | |
1874 | auto time = std::tm(); | |
1875 | time.tm_wday = static_cast<int>(wd.c_encoding()); | |
1876 | detail::get_locale loc(localized, ctx.locale()); | |
1877 | auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), time); | |
1878 | w.on_abbr_weekday(); | |
1879 | return w.out(); | |
1880 | } | |
1881 | }; | |
1882 | ||
1883 | template <typename Rep, typename Period, typename Char> | |
1884 | struct formatter<std::chrono::duration<Rep, Period>, Char> { | |
1885 | private: | |
1886 | basic_format_specs<Char> specs; | |
1887 | int precision = -1; | |
1888 | using arg_ref_type = detail::arg_ref<Char>; | |
1889 | arg_ref_type width_ref; | |
1890 | arg_ref_type precision_ref; | |
1891 | bool localized = false; | |
1892 | basic_string_view<Char> format_str; | |
1893 | using duration = std::chrono::duration<Rep, Period>; | |
1894 | ||
1895 | struct spec_handler { | |
1896 | formatter& f; | |
1897 | basic_format_parse_context<Char>& context; | |
1898 | basic_string_view<Char> format_str; | |
1899 | ||
1900 | template <typename Id> FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) { | |
1901 | context.check_arg_id(arg_id); | |
1902 | return arg_ref_type(arg_id); | |
1903 | } | |
1904 | ||
1905 | FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<Char> arg_id) { | |
1906 | context.check_arg_id(arg_id); | |
1907 | return arg_ref_type(arg_id); | |
1908 | } | |
1909 | ||
1910 | FMT_CONSTEXPR arg_ref_type make_arg_ref(detail::auto_id) { | |
1911 | return arg_ref_type(context.next_arg_id()); | |
1912 | } | |
1913 | ||
1914 | void on_error(const char* msg) { FMT_THROW(format_error(msg)); } | |
1915 | FMT_CONSTEXPR void on_fill(basic_string_view<Char> fill) { | |
1916 | f.specs.fill = fill; | |
1917 | } | |
1918 | FMT_CONSTEXPR void on_align(align_t align) { f.specs.align = align; } | |
1919 | FMT_CONSTEXPR void on_width(int width) { f.specs.width = width; } | |
1920 | FMT_CONSTEXPR void on_precision(int _precision) { | |
1921 | f.precision = _precision; | |
1922 | } | |
1923 | FMT_CONSTEXPR void end_precision() {} | |
1924 | ||
1925 | template <typename Id> FMT_CONSTEXPR void on_dynamic_width(Id arg_id) { | |
1926 | f.width_ref = make_arg_ref(arg_id); | |
1927 | } | |
1928 | ||
1929 | template <typename Id> FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) { | |
1930 | f.precision_ref = make_arg_ref(arg_id); | |
1931 | } | |
1932 | }; | |
1933 | ||
1934 | using iterator = typename basic_format_parse_context<Char>::iterator; | |
1935 | struct parse_range { | |
1936 | iterator begin; | |
1937 | iterator end; | |
1938 | }; | |
1939 | ||
1940 | FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) { | |
1941 | auto begin = ctx.begin(), end = ctx.end(); | |
1942 | if (begin == end || *begin == '}') return {begin, begin}; | |
1943 | spec_handler handler{*this, ctx, format_str}; | |
1944 | begin = detail::parse_align(begin, end, handler); | |
1945 | if (begin == end) return {begin, begin}; | |
1946 | begin = detail::parse_width(begin, end, handler); | |
1947 | if (begin == end) return {begin, begin}; | |
1948 | if (*begin == '.') { | |
1949 | if (std::is_floating_point<Rep>::value) | |
1950 | begin = detail::parse_precision(begin, end, handler); | |
1951 | else | |
1952 | handler.on_error("precision not allowed for this argument type"); | |
1953 | } | |
1954 | if (begin != end && *begin == 'L') { | |
1955 | ++begin; | |
1956 | localized = true; | |
1957 | } | |
1958 | end = detail::parse_chrono_format(begin, end, | |
1959 | detail::chrono_format_checker()); | |
1960 | return {begin, end}; | |
1961 | } | |
1962 | ||
1963 | public: | |
1964 | FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx) | |
1965 | -> decltype(ctx.begin()) { | |
1966 | auto range = do_parse(ctx); | |
1967 | format_str = basic_string_view<Char>( | |
1968 | &*range.begin, detail::to_unsigned(range.end - range.begin)); | |
1969 | return range.end; | |
1970 | } | |
1971 | ||
1972 | template <typename FormatContext> | |
1973 | auto format(const duration& d, FormatContext& ctx) const | |
1974 | -> decltype(ctx.out()) { | |
1975 | auto specs_copy = specs; | |
1976 | auto precision_copy = precision; | |
1977 | auto begin = format_str.begin(), end = format_str.end(); | |
1978 | // As a possible future optimization, we could avoid extra copying if width | |
1979 | // is not specified. | |
1980 | basic_memory_buffer<Char> buf; | |
1981 | auto out = std::back_inserter(buf); | |
1982 | detail::handle_dynamic_spec<detail::width_checker>(specs_copy.width, | |
1983 | width_ref, ctx); | |
1984 | detail::handle_dynamic_spec<detail::precision_checker>(precision_copy, | |
1985 | precision_ref, ctx); | |
1986 | if (begin == end || *begin == '}') { | |
1987 | out = detail::format_duration_value<Char>(out, d.count(), precision_copy); | |
1988 | detail::format_duration_unit<Char, Period>(out); | |
1989 | } else { | |
1990 | detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f( | |
1991 | ctx, out, d); | |
1992 | f.precision = precision_copy; | |
1993 | f.localized = localized; | |
1994 | detail::parse_chrono_format(begin, end, f); | |
1995 | } | |
1996 | return detail::write( | |
1997 | ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs_copy); | |
1998 | } | |
1999 | }; | |
2000 | ||
2001 | template <typename Char, typename Duration> | |
2002 | struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>, | |
2003 | Char> : formatter<std::tm, Char> { | |
2004 | FMT_CONSTEXPR formatter() { | |
8b75cd77 JG |
2005 | basic_string_view<Char> default_specs = |
2006 | detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{}; | |
2007 | this->do_parse(default_specs.begin(), default_specs.end()); | |
05aa7e19 JG |
2008 | } |
2009 | ||
2010 | template <typename FormatContext> | |
2011 | auto format(std::chrono::time_point<std::chrono::system_clock> val, | |
2012 | FormatContext& ctx) const -> decltype(ctx.out()) { | |
2013 | return formatter<std::tm, Char>::format(localtime(val), ctx); | |
2014 | } | |
05aa7e19 JG |
2015 | }; |
2016 | ||
05aa7e19 JG |
2017 | template <typename Char> struct formatter<std::tm, Char> { |
2018 | private: | |
2019 | enum class spec { | |
2020 | unknown, | |
2021 | year_month_day, | |
2022 | hh_mm_ss, | |
2023 | }; | |
2024 | spec spec_ = spec::unknown; | |
2025 | basic_string_view<Char> specs; | |
2026 | ||
2027 | protected: | |
8b75cd77 | 2028 | template <typename It> FMT_CONSTEXPR auto do_parse(It begin, It end) -> It { |
05aa7e19 JG |
2029 | if (begin != end && *begin == ':') ++begin; |
2030 | end = detail::parse_chrono_format(begin, end, detail::tm_format_checker()); | |
8b75cd77 JG |
2031 | // Replace default spec only if the new spec is not empty. |
2032 | if (end != begin) specs = {begin, detail::to_unsigned(end - begin)}; | |
2033 | return end; | |
2034 | } | |
2035 | ||
2036 | public: | |
2037 | FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx) | |
2038 | -> decltype(ctx.begin()) { | |
2039 | auto end = this->do_parse(ctx.begin(), ctx.end()); | |
05aa7e19 JG |
2040 | // basic_string_view<>::compare isn't constexpr before C++17. |
2041 | if (specs.size() == 2 && specs[0] == Char('%')) { | |
2042 | if (specs[1] == Char('F')) | |
2043 | spec_ = spec::year_month_day; | |
2044 | else if (specs[1] == Char('T')) | |
2045 | spec_ = spec::hh_mm_ss; | |
2046 | } | |
2047 | return end; | |
2048 | } | |
2049 | ||
05aa7e19 JG |
2050 | template <typename FormatContext> |
2051 | auto format(const std::tm& tm, FormatContext& ctx) const | |
2052 | -> decltype(ctx.out()) { | |
2053 | const auto loc_ref = ctx.locale(); | |
2054 | detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref); | |
2055 | auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), tm); | |
2056 | if (spec_ == spec::year_month_day) | |
2057 | w.on_iso_date(); | |
2058 | else if (spec_ == spec::hh_mm_ss) | |
2059 | w.on_iso_time(); | |
2060 | else | |
2061 | detail::parse_chrono_format(specs.begin(), specs.end(), w); | |
2062 | return w.out(); | |
2063 | } | |
2064 | }; | |
2065 | ||
2066 | FMT_MODULE_EXPORT_END | |
2067 | FMT_END_NAMESPACE | |
2068 | ||
2069 | #endif // FMT_CHRONO_H_ |