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-rw-r--r--NorthstarDLL/include/spdlog/fmt/bundled/chrono.h2232
1 files changed, 1116 insertions, 1116 deletions
diff --git a/NorthstarDLL/include/spdlog/fmt/bundled/chrono.h b/NorthstarDLL/include/spdlog/fmt/bundled/chrono.h
index e634bda3..bdfe2aa0 100644
--- a/NorthstarDLL/include/spdlog/fmt/bundled/chrono.h
+++ b/NorthstarDLL/include/spdlog/fmt/bundled/chrono.h
@@ -1,1116 +1,1116 @@
-// Formatting library for C++ - chrono support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_CHRONO_H_
-#define FMT_CHRONO_H_
-
-#include <chrono>
-#include <ctime>
-#include <locale>
-#include <sstream>
-
-#include "format.h"
-#include "locale.h"
-
-FMT_BEGIN_NAMESPACE
-
-// Enable safe chrono durations, unless explicitly disabled.
-#ifndef FMT_SAFE_DURATION_CAST
-# define FMT_SAFE_DURATION_CAST 1
-#endif
-#if FMT_SAFE_DURATION_CAST
-
-// For conversion between std::chrono::durations without undefined
-// behaviour or erroneous results.
-// This is a stripped down version of duration_cast, for inclusion in fmt.
-// See https://github.com/pauldreik/safe_duration_cast
-//
-// Copyright Paul Dreik 2019
-namespace safe_duration_cast {
-
-template <typename To, typename From,
- FMT_ENABLE_IF(!std::is_same<From, To>::value &&
- std::numeric_limits<From>::is_signed ==
- std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
- ec = 0;
- using F = std::numeric_limits<From>;
- using T = std::numeric_limits<To>;
- static_assert(F::is_integer, "From must be integral");
- static_assert(T::is_integer, "To must be integral");
-
- // A and B are both signed, or both unsigned.
- if (F::digits <= T::digits) {
- // From fits in To without any problem.
- } else {
- // From does not always fit in To, resort to a dynamic check.
- if (from < (T::min)() || from > (T::max)()) {
- // outside range.
- ec = 1;
- return {};
- }
- }
- return static_cast<To>(from);
-}
-
-/**
- * converts From to To, without loss. If the dynamic value of from
- * can't be converted to To without loss, ec is set.
- */
-template <typename To, typename From,
- FMT_ENABLE_IF(!std::is_same<From, To>::value &&
- std::numeric_limits<From>::is_signed !=
- std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
- ec = 0;
- using F = std::numeric_limits<From>;
- using T = std::numeric_limits<To>;
- static_assert(F::is_integer, "From must be integral");
- static_assert(T::is_integer, "To must be integral");
-
- if (detail::const_check(F::is_signed && !T::is_signed)) {
- // From may be negative, not allowed!
- if (fmt::detail::is_negative(from)) {
- ec = 1;
- return {};
- }
- // From is positive. Can it always fit in To?
- if (F::digits > T::digits &&
- from > static_cast<From>(detail::max_value<To>())) {
- ec = 1;
- return {};
- }
- }
-
- if (!F::is_signed && T::is_signed && F::digits >= T::digits &&
- from > static_cast<From>(detail::max_value<To>())) {
- ec = 1;
- return {};
- }
- return static_cast<To>(from); // Lossless conversion.
-}
-
-template <typename To, typename From,
- FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
- ec = 0;
- return from;
-} // function
-
-/**
- * converts From to To if possible, otherwise ec is set.
- *
- * input | output
- * ---------------------------------|---------------
- * NaN | NaN
- * Inf | Inf
- * normal, fits in output | converted (possibly lossy)
- * normal, does not fit in output | ec is set
- * subnormal | best effort
- * -Inf | -Inf
- */
-template <typename To, typename From,
- FMT_ENABLE_IF(!std::is_same<From, To>::value)>
-FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
- ec = 0;
- using T = std::numeric_limits<To>;
- static_assert(std::is_floating_point<From>::value, "From must be floating");
- static_assert(std::is_floating_point<To>::value, "To must be floating");
-
- // catch the only happy case
- if (std::isfinite(from)) {
- if (from >= T::lowest() && from <= (T::max)()) {
- return static_cast<To>(from);
- }
- // not within range.
- ec = 1;
- return {};
- }
-
- // nan and inf will be preserved
- return static_cast<To>(from);
-} // function
-
-template <typename To, typename From,
- FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
- ec = 0;
- static_assert(std::is_floating_point<From>::value, "From must be floating");
- return from;
-}
-
-/**
- * safe duration cast between integral durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
- FMT_ENABLE_IF(std::is_integral<FromRep>::value),
- FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
-To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
- int& ec) {
- using From = std::chrono::duration<FromRep, FromPeriod>;
- ec = 0;
- // the basic idea is that we need to convert from count() in the from type
- // to count() in the To type, by multiplying it with this:
- struct Factor
- : std::ratio_divide<typename From::period, typename To::period> {};
-
- static_assert(Factor::num > 0, "num must be positive");
- static_assert(Factor::den > 0, "den must be positive");
-
- // the conversion is like this: multiply from.count() with Factor::num
- // /Factor::den and convert it to To::rep, all this without
- // overflow/underflow. let's start by finding a suitable type that can hold
- // both To, From and Factor::num
- using IntermediateRep =
- typename std::common_type<typename From::rep, typename To::rep,
- decltype(Factor::num)>::type;
-
- // safe conversion to IntermediateRep
- IntermediateRep count =
- lossless_integral_conversion<IntermediateRep>(from.count(), ec);
- if (ec) return {};
- // multiply with Factor::num without overflow or underflow
- if (detail::const_check(Factor::num != 1)) {
- const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
- if (count > max1) {
- ec = 1;
- return {};
- }
- const auto min1 =
- (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
- if (count < min1) {
- ec = 1;
- return {};
- }
- count *= Factor::num;
- }
-
- if (detail::const_check(Factor::den != 1)) count /= Factor::den;
- auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
- return ec ? To() : To(tocount);
-}
-
-/**
- * safe duration_cast between floating point durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
- FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
- FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
-To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
- int& ec) {
- using From = std::chrono::duration<FromRep, FromPeriod>;
- ec = 0;
- if (std::isnan(from.count())) {
- // nan in, gives nan out. easy.
- return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
- }
- // maybe we should also check if from is denormal, and decide what to do about
- // it.
-
- // +-inf should be preserved.
- if (std::isinf(from.count())) {
- return To{from.count()};
- }
-
- // the basic idea is that we need to convert from count() in the from type
- // to count() in the To type, by multiplying it with this:
- struct Factor
- : std::ratio_divide<typename From::period, typename To::period> {};
-
- static_assert(Factor::num > 0, "num must be positive");
- static_assert(Factor::den > 0, "den must be positive");
-
- // the conversion is like this: multiply from.count() with Factor::num
- // /Factor::den and convert it to To::rep, all this without
- // overflow/underflow. let's start by finding a suitable type that can hold
- // both To, From and Factor::num
- using IntermediateRep =
- typename std::common_type<typename From::rep, typename To::rep,
- decltype(Factor::num)>::type;
-
- // force conversion of From::rep -> IntermediateRep to be safe,
- // even if it will never happen be narrowing in this context.
- IntermediateRep count =
- safe_float_conversion<IntermediateRep>(from.count(), ec);
- if (ec) {
- return {};
- }
-
- // multiply with Factor::num without overflow or underflow
- if (Factor::num != 1) {
- constexpr auto max1 = detail::max_value<IntermediateRep>() /
- static_cast<IntermediateRep>(Factor::num);
- if (count > max1) {
- ec = 1;
- return {};
- }
- constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
- static_cast<IntermediateRep>(Factor::num);
- if (count < min1) {
- ec = 1;
- return {};
- }
- count *= static_cast<IntermediateRep>(Factor::num);
- }
-
- // this can't go wrong, right? den>0 is checked earlier.
- if (Factor::den != 1) {
- using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
- count /= static_cast<common_t>(Factor::den);
- }
-
- // convert to the to type, safely
- using ToRep = typename To::rep;
-
- const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
- if (ec) {
- return {};
- }
- return To{tocount};
-}
-} // namespace safe_duration_cast
-#endif
-
-// Prevents expansion of a preceding token as a function-style macro.
-// Usage: f FMT_NOMACRO()
-#define FMT_NOMACRO
-
-namespace detail {
-inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
-inline null<> localtime_s(...) { return null<>(); }
-inline null<> gmtime_r(...) { return null<>(); }
-inline null<> gmtime_s(...) { return null<>(); }
-} // namespace detail
-
-// Thread-safe replacement for std::localtime
-inline std::tm localtime(std::time_t time) {
- struct dispatcher {
- std::time_t time_;
- std::tm tm_;
-
- dispatcher(std::time_t t) : time_(t) {}
-
- bool run() {
- using namespace fmt::detail;
- return handle(localtime_r(&time_, &tm_));
- }
-
- bool handle(std::tm* tm) { return tm != nullptr; }
-
- bool handle(detail::null<>) {
- using namespace fmt::detail;
- return fallback(localtime_s(&tm_, &time_));
- }
-
- bool fallback(int res) { return res == 0; }
-
-#if !FMT_MSC_VER
- bool fallback(detail::null<>) {
- using namespace fmt::detail;
- std::tm* tm = std::localtime(&time_);
- if (tm) tm_ = *tm;
- return tm != nullptr;
- }
-#endif
- };
- dispatcher lt(time);
- // Too big time values may be unsupported.
- if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
- return lt.tm_;
-}
-
-inline std::tm localtime(
- std::chrono::time_point<std::chrono::system_clock> time_point) {
- return localtime(std::chrono::system_clock::to_time_t(time_point));
-}
-
-// Thread-safe replacement for std::gmtime
-inline std::tm gmtime(std::time_t time) {
- struct dispatcher {
- std::time_t time_;
- std::tm tm_;
-
- dispatcher(std::time_t t) : time_(t) {}
-
- bool run() {
- using namespace fmt::detail;
- return handle(gmtime_r(&time_, &tm_));
- }
-
- bool handle(std::tm* tm) { return tm != nullptr; }
-
- bool handle(detail::null<>) {
- using namespace fmt::detail;
- return fallback(gmtime_s(&tm_, &time_));
- }
-
- bool fallback(int res) { return res == 0; }
-
-#if !FMT_MSC_VER
- bool fallback(detail::null<>) {
- std::tm* tm = std::gmtime(&time_);
- if (tm) tm_ = *tm;
- return tm != nullptr;
- }
-#endif
- };
- dispatcher gt(time);
- // Too big time values may be unsupported.
- if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
- return gt.tm_;
-}
-
-inline std::tm gmtime(
- std::chrono::time_point<std::chrono::system_clock> time_point) {
- return gmtime(std::chrono::system_clock::to_time_t(time_point));
-}
-
-namespace detail {
-inline size_t strftime(char* str, size_t count, const char* format,
- const std::tm* time) {
- return std::strftime(str, count, format, time);
-}
-
-inline size_t strftime(wchar_t* str, size_t count, const wchar_t* format,
- const std::tm* time) {
- return std::wcsftime(str, count, format, time);
-}
-} // namespace detail
-
-template <typename Char>
-struct formatter<std::chrono::time_point<std::chrono::system_clock>, Char>
- : formatter<std::tm, Char> {
- template <typename FormatContext>
- auto format(std::chrono::time_point<std::chrono::system_clock> val,
- FormatContext& ctx) -> decltype(ctx.out()) {
- std::tm time = localtime(val);
- return formatter<std::tm, Char>::format(time, ctx);
- }
-};
-
-template <typename Char> struct formatter<std::tm, Char> {
- template <typename ParseContext>
- auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
- auto it = ctx.begin();
- if (it != ctx.end() && *it == ':') ++it;
- auto end = it;
- while (end != ctx.end() && *end != '}') ++end;
- tm_format.reserve(detail::to_unsigned(end - it + 1));
- tm_format.append(it, end);
- tm_format.push_back('\0');
- return end;
- }
-
- template <typename FormatContext>
- auto format(const std::tm& tm, FormatContext& ctx) -> decltype(ctx.out()) {
- basic_memory_buffer<Char> buf;
- size_t start = buf.size();
- for (;;) {
- size_t size = buf.capacity() - start;
- size_t count = detail::strftime(&buf[start], size, &tm_format[0], &tm);
- if (count != 0) {
- buf.resize(start + count);
- break;
- }
- if (size >= tm_format.size() * 256) {
- // If the buffer is 256 times larger than the format string, assume
- // that `strftime` gives an empty result. There doesn't seem to be a
- // better way to distinguish the two cases:
- // https://github.com/fmtlib/fmt/issues/367
- break;
- }
- const size_t MIN_GROWTH = 10;
- buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
- }
- return std::copy(buf.begin(), buf.end(), ctx.out());
- }
-
- basic_memory_buffer<Char> tm_format;
-};
-
-namespace detail {
-template <typename Period> FMT_CONSTEXPR const char* get_units() {
- return nullptr;
-}
-template <> FMT_CONSTEXPR const char* get_units<std::atto>() { return "as"; }
-template <> FMT_CONSTEXPR const char* get_units<std::femto>() { return "fs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::pico>() { return "ps"; }
-template <> FMT_CONSTEXPR const char* get_units<std::nano>() { return "ns"; }
-template <> FMT_CONSTEXPR const char* get_units<std::micro>() { return "µs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::milli>() { return "ms"; }
-template <> FMT_CONSTEXPR const char* get_units<std::centi>() { return "cs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::deci>() { return "ds"; }
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<1>>() { return "s"; }
-template <> FMT_CONSTEXPR const char* get_units<std::deca>() { return "das"; }
-template <> FMT_CONSTEXPR const char* get_units<std::hecto>() { return "hs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::kilo>() { return "ks"; }
-template <> FMT_CONSTEXPR const char* get_units<std::mega>() { return "Ms"; }
-template <> FMT_CONSTEXPR const char* get_units<std::giga>() { return "Gs"; }
-template <> FMT_CONSTEXPR const char* get_units<std::tera>() { return "Ts"; }
-template <> FMT_CONSTEXPR const char* get_units<std::peta>() { return "Ps"; }
-template <> FMT_CONSTEXPR const char* get_units<std::exa>() { return "Es"; }
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<60>>() {
- return "m";
-}
-template <> FMT_CONSTEXPR const char* get_units<std::ratio<3600>>() {
- return "h";
-}
-
-enum class numeric_system {
- standard,
- // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
- alternative
-};
-
-// Parses a put_time-like format string and invokes handler actions.
-template <typename Char, typename Handler>
-FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
- const Char* end,
- Handler&& handler) {
- auto ptr = begin;
- while (ptr != end) {
- auto c = *ptr;
- if (c == '}') break;
- if (c != '%') {
- ++ptr;
- continue;
- }
- if (begin != ptr) handler.on_text(begin, ptr);
- ++ptr; // consume '%'
- if (ptr == end) FMT_THROW(format_error("invalid format"));
- c = *ptr++;
- switch (c) {
- case '%':
- handler.on_text(ptr - 1, ptr);
- break;
- case 'n': {
- const Char newline[] = {'\n'};
- handler.on_text(newline, newline + 1);
- break;
- }
- case 't': {
- const Char tab[] = {'\t'};
- handler.on_text(tab, tab + 1);
- break;
- }
- // Day of the week:
- case 'a':
- handler.on_abbr_weekday();
- break;
- case 'A':
- handler.on_full_weekday();
- break;
- case 'w':
- handler.on_dec0_weekday(numeric_system::standard);
- break;
- case 'u':
- handler.on_dec1_weekday(numeric_system::standard);
- break;
- // Month:
- case 'b':
- handler.on_abbr_month();
- break;
- case 'B':
- handler.on_full_month();
- break;
- // Hour, minute, second:
- case 'H':
- handler.on_24_hour(numeric_system::standard);
- break;
- case 'I':
- handler.on_12_hour(numeric_system::standard);
- break;
- case 'M':
- handler.on_minute(numeric_system::standard);
- break;
- case 'S':
- handler.on_second(numeric_system::standard);
- break;
- // Other:
- case 'c':
- handler.on_datetime(numeric_system::standard);
- break;
- case 'x':
- handler.on_loc_date(numeric_system::standard);
- break;
- case 'X':
- handler.on_loc_time(numeric_system::standard);
- break;
- case 'D':
- handler.on_us_date();
- break;
- case 'F':
- handler.on_iso_date();
- break;
- case 'r':
- handler.on_12_hour_time();
- break;
- case 'R':
- handler.on_24_hour_time();
- break;
- case 'T':
- handler.on_iso_time();
- break;
- case 'p':
- handler.on_am_pm();
- break;
- case 'Q':
- handler.on_duration_value();
- break;
- case 'q':
- handler.on_duration_unit();
- break;
- case 'z':
- handler.on_utc_offset();
- break;
- case 'Z':
- handler.on_tz_name();
- break;
- // Alternative representation:
- case 'E': {
- if (ptr == end) FMT_THROW(format_error("invalid format"));
- c = *ptr++;
- switch (c) {
- case 'c':
- handler.on_datetime(numeric_system::alternative);
- break;
- case 'x':
- handler.on_loc_date(numeric_system::alternative);
- break;
- case 'X':
- handler.on_loc_time(numeric_system::alternative);
- break;
- default:
- FMT_THROW(format_error("invalid format"));
- }
- break;
- }
- case 'O':
- if (ptr == end) FMT_THROW(format_error("invalid format"));
- c = *ptr++;
- switch (c) {
- case 'w':
- handler.on_dec0_weekday(numeric_system::alternative);
- break;
- case 'u':
- handler.on_dec1_weekday(numeric_system::alternative);
- break;
- case 'H':
- handler.on_24_hour(numeric_system::alternative);
- break;
- case 'I':
- handler.on_12_hour(numeric_system::alternative);
- break;
- case 'M':
- handler.on_minute(numeric_system::alternative);
- break;
- case 'S':
- handler.on_second(numeric_system::alternative);
- break;
- default:
- FMT_THROW(format_error("invalid format"));
- }
- break;
- default:
- FMT_THROW(format_error("invalid format"));
- }
- begin = ptr;
- }
- if (begin != ptr) handler.on_text(begin, ptr);
- return ptr;
-}
-
-struct chrono_format_checker {
- FMT_NORETURN void report_no_date() { FMT_THROW(format_error("no date")); }
-
- template <typename Char> void on_text(const Char*, const Char*) {}
- FMT_NORETURN void on_abbr_weekday() { report_no_date(); }
- FMT_NORETURN void on_full_weekday() { report_no_date(); }
- FMT_NORETURN void on_dec0_weekday(numeric_system) { report_no_date(); }
- FMT_NORETURN void on_dec1_weekday(numeric_system) { report_no_date(); }
- FMT_NORETURN void on_abbr_month() { report_no_date(); }
- FMT_NORETURN void on_full_month() { report_no_date(); }
- void on_24_hour(numeric_system) {}
- void on_12_hour(numeric_system) {}
- void on_minute(numeric_system) {}
- void on_second(numeric_system) {}
- FMT_NORETURN void on_datetime(numeric_system) { report_no_date(); }
- FMT_NORETURN void on_loc_date(numeric_system) { report_no_date(); }
- FMT_NORETURN void on_loc_time(numeric_system) { report_no_date(); }
- FMT_NORETURN void on_us_date() { report_no_date(); }
- FMT_NORETURN void on_iso_date() { report_no_date(); }
- void on_12_hour_time() {}
- void on_24_hour_time() {}
- void on_iso_time() {}
- void on_am_pm() {}
- void on_duration_value() {}
- void on_duration_unit() {}
- FMT_NORETURN void on_utc_offset() { report_no_date(); }
- FMT_NORETURN void on_tz_name() { report_no_date(); }
-};
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline bool isnan(T) {
- return false;
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline bool isnan(T value) {
- return std::isnan(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline bool isfinite(T) {
- return true;
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline bool isfinite(T value) {
- return std::isfinite(value);
-}
-
-// Converts value to int and checks that it's in the range [0, upper).
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline int to_nonnegative_int(T value, int upper) {
- FMT_ASSERT(value >= 0 && value <= upper, "invalid value");
- (void)upper;
- return static_cast<int>(value);
-}
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-inline int to_nonnegative_int(T value, int upper) {
- FMT_ASSERT(
- std::isnan(value) || (value >= 0 && value <= static_cast<T>(upper)),
- "invalid value");
- (void)upper;
- return static_cast<int>(value);
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline T mod(T x, int y) {
- return x % static_cast<T>(y);
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline T mod(T x, int y) {
- return std::fmod(x, static_cast<T>(y));
-}
-
-// If T is an integral type, maps T to its unsigned counterpart, otherwise
-// leaves it unchanged (unlike std::make_unsigned).
-template <typename T, bool INTEGRAL = std::is_integral<T>::value>
-struct make_unsigned_or_unchanged {
- using type = T;
-};
-
-template <typename T> struct make_unsigned_or_unchanged<T, true> {
- using type = typename std::make_unsigned<T>::type;
-};
-
-#if FMT_SAFE_DURATION_CAST
-// throwing version of safe_duration_cast
-template <typename To, typename FromRep, typename FromPeriod>
-To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
- int ec;
- To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
- if (ec) FMT_THROW(format_error("cannot format duration"));
- return to;
-}
-#endif
-
-template <typename Rep, typename Period,
- FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-inline std::chrono::duration<Rep, std::milli> get_milliseconds(
- std::chrono::duration<Rep, Period> d) {
- // this may overflow and/or the result may not fit in the
- // target type.
-#if FMT_SAFE_DURATION_CAST
- using CommonSecondsType =
- typename std::common_type<decltype(d), std::chrono::seconds>::type;
- const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
- const auto d_as_whole_seconds =
- fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
- // this conversion should be nonproblematic
- const auto diff = d_as_common - d_as_whole_seconds;
- const auto ms =
- fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
- return ms;
-#else
- auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
- return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
-#endif
-}
-
-template <typename Rep, typename Period,
- FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
-inline std::chrono::duration<Rep, std::milli> get_milliseconds(
- std::chrono::duration<Rep, Period> d) {
- using common_type = typename std::common_type<Rep, std::intmax_t>::type;
- auto ms = mod(d.count() * static_cast<common_type>(Period::num) /
- static_cast<common_type>(Period::den) * 1000,
- 1000);
- return std::chrono::duration<Rep, std::milli>(static_cast<Rep>(ms));
-}
-
-template <typename Char, typename Rep, typename OutputIt>
-OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
- const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0};
- if (precision >= 0) return format_to(out, pr_f, val, precision);
- const Char fp_f[] = {'{', ':', 'g', '}', 0};
- const Char format[] = {'{', '}', 0};
- return format_to(out, std::is_floating_point<Rep>::value ? fp_f : format,
- val);
-}
-template <typename Char, typename OutputIt>
-OutputIt copy_unit(string_view unit, OutputIt out, Char) {
- return std::copy(unit.begin(), unit.end(), out);
-}
-
-template <typename OutputIt>
-OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
- // This works when wchar_t is UTF-32 because units only contain characters
- // that have the same representation in UTF-16 and UTF-32.
- utf8_to_utf16 u(unit);
- return std::copy(u.c_str(), u.c_str() + u.size(), out);
-}
-
-template <typename Char, typename Period, typename OutputIt>
-OutputIt format_duration_unit(OutputIt out) {
- if (const char* unit = get_units<Period>())
- return copy_unit(string_view(unit), out, Char());
- const Char num_f[] = {'[', '{', '}', ']', 's', 0};
- if (const_check(Period::den == 1)) return format_to(out, num_f, Period::num);
- const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
- return format_to(out, num_def_f, Period::num, Period::den);
-}
-
-template <typename FormatContext, typename OutputIt, typename Rep,
- typename Period>
-struct chrono_formatter {
- FormatContext& context;
- OutputIt out;
- int precision;
- // rep is unsigned to avoid overflow.
- using rep =
- conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
- unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
- rep val;
- using seconds = std::chrono::duration<rep>;
- seconds s;
- using milliseconds = std::chrono::duration<rep, std::milli>;
- bool negative;
-
- using char_type = typename FormatContext::char_type;
-
- explicit chrono_formatter(FormatContext& ctx, OutputIt o,
- std::chrono::duration<Rep, Period> d)
- : context(ctx),
- out(o),
- val(static_cast<rep>(d.count())),
- negative(false) {
- if (d.count() < 0) {
- val = 0 - val;
- negative = true;
- }
-
- // this may overflow and/or the result may not fit in the
- // target type.
-#if FMT_SAFE_DURATION_CAST
- // might need checked conversion (rep!=Rep)
- auto tmpval = std::chrono::duration<rep, Period>(val);
- s = fmt_safe_duration_cast<seconds>(tmpval);
-#else
- s = std::chrono::duration_cast<seconds>(
- std::chrono::duration<rep, Period>(val));
-#endif
- }
-
- // returns true if nan or inf, writes to out.
- bool handle_nan_inf() {
- if (isfinite(val)) {
- return false;
- }
- if (isnan(val)) {
- write_nan();
- return true;
- }
- // must be +-inf
- if (val > 0) {
- write_pinf();
- } else {
- write_ninf();
- }
- return true;
- }
-
- Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
-
- Rep hour12() const {
- Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
- return hour <= 0 ? 12 : hour;
- }
-
- Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); }
- Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); }
-
- std::tm time() const {
- auto time = std::tm();
- time.tm_hour = to_nonnegative_int(hour(), 24);
- time.tm_min = to_nonnegative_int(minute(), 60);
- time.tm_sec = to_nonnegative_int(second(), 60);
- return time;
- }
-
- void write_sign() {
- if (negative) {
- *out++ = '-';
- negative = false;
- }
- }
-
- void write(Rep value, int width) {
- write_sign();
- if (isnan(value)) return write_nan();
- uint32_or_64_or_128_t<int> n =
- to_unsigned(to_nonnegative_int(value, max_value<int>()));
- int num_digits = detail::count_digits(n);
- if (width > num_digits) out = std::fill_n(out, width - num_digits, '0');
- out = format_decimal<char_type>(out, n, num_digits).end;
- }
-
- void write_nan() { std::copy_n("nan", 3, out); }
- void write_pinf() { std::copy_n("inf", 3, out); }
- void write_ninf() { std::copy_n("-inf", 4, out); }
-
- void format_localized(const tm& time, char format, char modifier = 0) {
- if (isnan(val)) return write_nan();
- auto locale = context.locale().template get<std::locale>();
- auto& facet = std::use_facet<std::time_put<char_type>>(locale);
- std::basic_ostringstream<char_type> os;
- os.imbue(locale);
- facet.put(os, os, ' ', &time, format, modifier);
- auto str = os.str();
- std::copy(str.begin(), str.end(), out);
- }
-
- void on_text(const char_type* begin, const char_type* end) {
- std::copy(begin, end, out);
- }
-
- // These are not implemented because durations don't have date information.
- void on_abbr_weekday() {}
- void on_full_weekday() {}
- void on_dec0_weekday(numeric_system) {}
- void on_dec1_weekday(numeric_system) {}
- void on_abbr_month() {}
- void on_full_month() {}
- void on_datetime(numeric_system) {}
- void on_loc_date(numeric_system) {}
- void on_loc_time(numeric_system) {}
- void on_us_date() {}
- void on_iso_date() {}
- void on_utc_offset() {}
- void on_tz_name() {}
-
- void on_24_hour(numeric_system ns) {
- if (handle_nan_inf()) return;
-
- if (ns == numeric_system::standard) return write(hour(), 2);
- auto time = tm();
- time.tm_hour = to_nonnegative_int(hour(), 24);
- format_localized(time, 'H', 'O');
- }
-
- void on_12_hour(numeric_system ns) {
- if (handle_nan_inf()) return;
-
- if (ns == numeric_system::standard) return write(hour12(), 2);
- auto time = tm();
- time.tm_hour = to_nonnegative_int(hour12(), 12);
- format_localized(time, 'I', 'O');
- }
-
- void on_minute(numeric_system ns) {
- if (handle_nan_inf()) return;
-
- if (ns == numeric_system::standard) return write(minute(), 2);
- auto time = tm();
- time.tm_min = to_nonnegative_int(minute(), 60);
- format_localized(time, 'M', 'O');
- }
-
- void on_second(numeric_system ns) {
- if (handle_nan_inf()) return;
-
- if (ns == numeric_system::standard) {
- write(second(), 2);
-#if FMT_SAFE_DURATION_CAST
- // convert rep->Rep
- using duration_rep = std::chrono::duration<rep, Period>;
- using duration_Rep = std::chrono::duration<Rep, Period>;
- auto tmpval = fmt_safe_duration_cast<duration_Rep>(duration_rep{val});
-#else
- auto tmpval = std::chrono::duration<Rep, Period>(val);
-#endif
- auto ms = get_milliseconds(tmpval);
- if (ms != std::chrono::milliseconds(0)) {
- *out++ = '.';
- write(ms.count(), 3);
- }
- return;
- }
- auto time = tm();
- time.tm_sec = to_nonnegative_int(second(), 60);
- format_localized(time, 'S', 'O');
- }
-
- void on_12_hour_time() {
- if (handle_nan_inf()) return;
- format_localized(time(), 'r');
- }
-
- void on_24_hour_time() {
- if (handle_nan_inf()) {
- *out++ = ':';
- handle_nan_inf();
- return;
- }
-
- write(hour(), 2);
- *out++ = ':';
- write(minute(), 2);
- }
-
- void on_iso_time() {
- on_24_hour_time();
- *out++ = ':';
- if (handle_nan_inf()) return;
- write(second(), 2);
- }
-
- void on_am_pm() {
- if (handle_nan_inf()) return;
- format_localized(time(), 'p');
- }
-
- void on_duration_value() {
- if (handle_nan_inf()) return;
- write_sign();
- out = format_duration_value<char_type>(out, val, precision);
- }
-
- void on_duration_unit() {
- out = format_duration_unit<char_type, Period>(out);
- }
-};
-} // namespace detail
-
-template <typename Rep, typename Period, typename Char>
-struct formatter<std::chrono::duration<Rep, Period>, Char> {
- private:
- basic_format_specs<Char> specs;
- int precision;
- using arg_ref_type = detail::arg_ref<Char>;
- arg_ref_type width_ref;
- arg_ref_type precision_ref;
- mutable basic_string_view<Char> format_str;
- using duration = std::chrono::duration<Rep, Period>;
-
- struct spec_handler {
- formatter& f;
- basic_format_parse_context<Char>& context;
- basic_string_view<Char> format_str;
-
- template <typename Id> FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
- context.check_arg_id(arg_id);
- return arg_ref_type(arg_id);
- }
-
- FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<Char> arg_id) {
- context.check_arg_id(arg_id);
- return arg_ref_type(arg_id);
- }
-
- FMT_CONSTEXPR arg_ref_type make_arg_ref(detail::auto_id) {
- return arg_ref_type(context.next_arg_id());
- }
-
- void on_error(const char* msg) { FMT_THROW(format_error(msg)); }
- void on_fill(basic_string_view<Char> fill) { f.specs.fill = fill; }
- void on_align(align_t align) { f.specs.align = align; }
- void on_width(int width) { f.specs.width = width; }
- void on_precision(int _precision) { f.precision = _precision; }
- void end_precision() {}
-
- template <typename Id> void on_dynamic_width(Id arg_id) {
- f.width_ref = make_arg_ref(arg_id);
- }
-
- template <typename Id> void on_dynamic_precision(Id arg_id) {
- f.precision_ref = make_arg_ref(arg_id);
- }
- };
-
- using iterator = typename basic_format_parse_context<Char>::iterator;
- struct parse_range {
- iterator begin;
- iterator end;
- };
-
- FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) {
- auto begin = ctx.begin(), end = ctx.end();
- if (begin == end || *begin == '}') return {begin, begin};
- spec_handler handler{*this, ctx, format_str};
- begin = detail::parse_align(begin, end, handler);
- if (begin == end) return {begin, begin};
- begin = detail::parse_width(begin, end, handler);
- if (begin == end) return {begin, begin};
- if (*begin == '.') {
- if (std::is_floating_point<Rep>::value)
- begin = detail::parse_precision(begin, end, handler);
- else
- handler.on_error("precision not allowed for this argument type");
- }
- end = parse_chrono_format(begin, end, detail::chrono_format_checker());
- return {begin, end};
- }
-
- public:
- formatter() : precision(-1) {}
-
- FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
- -> decltype(ctx.begin()) {
- auto range = do_parse(ctx);
- format_str = basic_string_view<Char>(
- &*range.begin, detail::to_unsigned(range.end - range.begin));
- return range.end;
- }
-
- template <typename FormatContext>
- auto format(const duration& d, FormatContext& ctx) -> decltype(ctx.out()) {
- auto begin = format_str.begin(), end = format_str.end();
- // As a possible future optimization, we could avoid extra copying if width
- // is not specified.
- basic_memory_buffer<Char> buf;
- auto out = std::back_inserter(buf);
- detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref,
- ctx);
- detail::handle_dynamic_spec<detail::precision_checker>(precision,
- precision_ref, ctx);
- if (begin == end || *begin == '}') {
- out = detail::format_duration_value<Char>(out, d.count(), precision);
- detail::format_duration_unit<Char, Period>(out);
- } else {
- detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
- ctx, out, d);
- f.precision = precision;
- parse_chrono_format(begin, end, f);
- }
- return detail::write(
- ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
- }
-};
-
-FMT_END_NAMESPACE
-
-#endif // FMT_CHRONO_H_
+// Formatting library for C++ - chrono support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CHRONO_H_
+#define FMT_CHRONO_H_
+
+#include <chrono>
+#include <ctime>
+#include <locale>
+#include <sstream>
+
+#include "format.h"
+#include "locale.h"
+
+FMT_BEGIN_NAMESPACE
+
+// Enable safe chrono durations, unless explicitly disabled.
+#ifndef FMT_SAFE_DURATION_CAST
+# define FMT_SAFE_DURATION_CAST 1
+#endif
+#if FMT_SAFE_DURATION_CAST
+
+// For conversion between std::chrono::durations without undefined
+// behaviour or erroneous results.
+// This is a stripped down version of duration_cast, for inclusion in fmt.
+// See https://github.com/pauldreik/safe_duration_cast
+//
+// Copyright Paul Dreik 2019
+namespace safe_duration_cast {
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+ std::numeric_limits<From>::is_signed ==
+ std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ using F = std::numeric_limits<From>;
+ using T = std::numeric_limits<To>;
+ static_assert(F::is_integer, "From must be integral");
+ static_assert(T::is_integer, "To must be integral");
+
+ // A and B are both signed, or both unsigned.
+ if (F::digits <= T::digits) {
+ // From fits in To without any problem.
+ } else {
+ // From does not always fit in To, resort to a dynamic check.
+ if (from < (T::min)() || from > (T::max)()) {
+ // outside range.
+ ec = 1;
+ return {};
+ }
+ }
+ return static_cast<To>(from);
+}
+
+/**
+ * converts From to To, without loss. If the dynamic value of from
+ * can't be converted to To without loss, ec is set.
+ */
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value &&
+ std::numeric_limits<From>::is_signed !=
+ std::numeric_limits<To>::is_signed)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ using F = std::numeric_limits<From>;
+ using T = std::numeric_limits<To>;
+ static_assert(F::is_integer, "From must be integral");
+ static_assert(T::is_integer, "To must be integral");
+
+ if (detail::const_check(F::is_signed && !T::is_signed)) {
+ // From may be negative, not allowed!
+ if (fmt::detail::is_negative(from)) {
+ ec = 1;
+ return {};
+ }
+ // From is positive. Can it always fit in To?
+ if (F::digits > T::digits &&
+ from > static_cast<From>(detail::max_value<To>())) {
+ ec = 1;
+ return {};
+ }
+ }
+
+ if (!F::is_signed && T::is_signed && F::digits >= T::digits &&
+ from > static_cast<From>(detail::max_value<To>())) {
+ ec = 1;
+ return {};
+ }
+ return static_cast<To>(from); // Lossless conversion.
+}
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To lossless_integral_conversion(const From from, int& ec) {
+ ec = 0;
+ return from;
+} // function
+
+/**
+ * converts From to To if possible, otherwise ec is set.
+ *
+ * input | output
+ * ---------------------------------|---------------
+ * NaN | NaN
+ * Inf | Inf
+ * normal, fits in output | converted (possibly lossy)
+ * normal, does not fit in output | ec is set
+ * subnormal | best effort
+ * -Inf | -Inf
+ */
+template <typename To, typename From,
+ FMT_ENABLE_IF(!std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+ ec = 0;
+ using T = std::numeric_limits<To>;
+ static_assert(std::is_floating_point<From>::value, "From must be floating");
+ static_assert(std::is_floating_point<To>::value, "To must be floating");
+
+ // catch the only happy case
+ if (std::isfinite(from)) {
+ if (from >= T::lowest() && from <= (T::max)()) {
+ return static_cast<To>(from);
+ }
+ // not within range.
+ ec = 1;
+ return {};
+ }
+
+ // nan and inf will be preserved
+ return static_cast<To>(from);
+} // function
+
+template <typename To, typename From,
+ FMT_ENABLE_IF(std::is_same<From, To>::value)>
+FMT_CONSTEXPR To safe_float_conversion(const From from, int& ec) {
+ ec = 0;
+ static_assert(std::is_floating_point<From>::value, "From must be floating");
+ return from;
+}
+
+/**
+ * safe duration cast between integral durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+ FMT_ENABLE_IF(std::is_integral<FromRep>::value),
+ FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+ int& ec) {
+ using From = std::chrono::duration<FromRep, FromPeriod>;
+ ec = 0;
+ // the basic idea is that we need to convert from count() in the from type
+ // to count() in the To type, by multiplying it with this:
+ struct Factor
+ : std::ratio_divide<typename From::period, typename To::period> {};
+
+ static_assert(Factor::num > 0, "num must be positive");
+ static_assert(Factor::den > 0, "den must be positive");
+
+ // the conversion is like this: multiply from.count() with Factor::num
+ // /Factor::den and convert it to To::rep, all this without
+ // overflow/underflow. let's start by finding a suitable type that can hold
+ // both To, From and Factor::num
+ using IntermediateRep =
+ typename std::common_type<typename From::rep, typename To::rep,
+ decltype(Factor::num)>::type;
+
+ // safe conversion to IntermediateRep
+ IntermediateRep count =
+ lossless_integral_conversion<IntermediateRep>(from.count(), ec);
+ if (ec) return {};
+ // multiply with Factor::num without overflow or underflow
+ if (detail::const_check(Factor::num != 1)) {
+ const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
+ if (count > max1) {
+ ec = 1;
+ return {};
+ }
+ const auto min1 =
+ (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
+ if (count < min1) {
+ ec = 1;
+ return {};
+ }
+ count *= Factor::num;
+ }
+
+ if (detail::const_check(Factor::den != 1)) count /= Factor::den;
+ auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
+ return ec ? To() : To(tocount);
+}
+
+/**
+ * safe duration_cast between floating point durations
+ */
+template <typename To, typename FromRep, typename FromPeriod,
+ FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
+ FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
+To safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
+ int& ec) {
+ using From = std::chrono::duration<FromRep, FromPeriod>;
+ ec = 0;
+ if (std::isnan(from.count())) {
+ // nan in, gives nan out. easy.
+ return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
+ }
+ // maybe we should also check if from is denormal, and decide what to do about
+ // it.
+
+ // +-inf should be preserved.
+ if (std::isinf(from.count())) {
+ return To{from.count()};
+ }
+
+ // the basic idea is that we need to convert from count() in the from type
+ // to count() in the To type, by multiplying it with this:
+ struct Factor
+ : std::ratio_divide<typename From::period, typename To::period> {};
+
+ static_assert(Factor::num > 0, "num must be positive");
+ static_assert(Factor::den > 0, "den must be positive");
+
+ // the conversion is like this: multiply from.count() with Factor::num
+ // /Factor::den and convert it to To::rep, all this without
+ // overflow/underflow. let's start by finding a suitable type that can hold
+ // both To, From and Factor::num
+ using IntermediateRep =
+ typename std::common_type<typename From::rep, typename To::rep,
+ decltype(Factor::num)>::type;
+
+ // force conversion of From::rep -> IntermediateRep to be safe,
+ // even if it will never happen be narrowing in this context.
+ IntermediateRep count =
+ safe_float_conversion<IntermediateRep>(from.count(), ec);
+ if (ec) {
+ return {};
+ }
+
+ // multiply with Factor::num without overflow or underflow
+ if (Factor::num != 1) {
+ constexpr auto max1 = detail::max_value<IntermediateRep>() /
+ static_cast<IntermediateRep>(Factor::num);
+ if (count > max1) {
+ ec = 1;
+ return {};
+ }
+ constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
+ static_cast<IntermediateRep>(Factor::num);
+ if (count < min1) {
+ ec = 1;
+ return {};
+ }
+ count *= static_cast<IntermediateRep>(Factor::num);
+ }
+
+ // this can't go wrong, right? den>0 is checked earlier.
+ if (Factor::den != 1) {
+ using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
+ count /= static_cast<common_t>(Factor::den);
+ }
+
+ // convert to the to type, safely
+ using ToRep = typename To::rep;
+
+ const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
+ if (ec) {
+ return {};
+ }
+ return To{tocount};
+}
+} // namespace safe_duration_cast
+#endif
+
+// Prevents expansion of a preceding token as a function-style macro.
+// Usage: f FMT_NOMACRO()
+#define FMT_NOMACRO
+
+namespace detail {
+inline null<> localtime_r FMT_NOMACRO(...) { return null<>(); }
+inline null<> localtime_s(...) { return null<>(); }
+inline null<> gmtime_r(...) { return null<>(); }
+inline null<> gmtime_s(...) { return null<>(); }
+} // namespace detail
+
+// Thread-safe replacement for std::localtime
+inline std::tm localtime(std::time_t time) {
+ struct dispatcher {
+ std::time_t time_;
+ std::tm tm_;
+
+ dispatcher(std::time_t t) : time_(t) {}
+
+ bool run() {
+ using namespace fmt::detail;
+ return handle(localtime_r(&time_, &tm_));
+ }
+
+ bool handle(std::tm* tm) { return tm != nullptr; }
+
+ bool handle(detail::null<>) {
+ using namespace fmt::detail;
+ return fallback(localtime_s(&tm_, &time_));
+ }
+
+ bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VER
+ bool fallback(detail::null<>) {
+ using namespace fmt::detail;
+ std::tm* tm = std::localtime(&time_);
+ if (tm) tm_ = *tm;
+ return tm != nullptr;
+ }
+#endif
+ };
+ dispatcher lt(time);
+ // Too big time values may be unsupported.
+ if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
+ return lt.tm_;
+}
+
+inline std::tm localtime(
+ std::chrono::time_point<std::chrono::system_clock> time_point) {
+ return localtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
+// Thread-safe replacement for std::gmtime
+inline std::tm gmtime(std::time_t time) {
+ struct dispatcher {
+ std::time_t time_;
+ std::tm tm_;
+
+ dispatcher(std::time_t t) : time_(t) {}
+
+ bool run() {
+ using namespace fmt::detail;
+ return handle(gmtime_r(&time_, &tm_));
+ }
+
+ bool handle(std::tm* tm) { return tm != nullptr; }
+
+ bool handle(detail::null<>) {
+ using namespace fmt::detail;
+ return fallback(gmtime_s(&tm_, &time_));
+ }
+
+ bool fallback(int res) { return res == 0; }
+
+#if !FMT_MSC_VER
+ bool fallback(detail::null<>) {
+ std::tm* tm = std::gmtime(&time_);
+ if (tm) tm_ = *tm;
+ return tm != nullptr;
+ }
+#endif
+ };
+ dispatcher gt(time);
+ // Too big time values may be unsupported.
+ if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
+ return gt.tm_;
+}
+
+inline std::tm gmtime(
+ std::chrono::time_point<std::chrono::system_clock> time_point) {
+ return gmtime(std::chrono::system_clock::to_time_t(time_point));
+}
+
+namespace detail {
+inline size_t strftime(char* str, size_t count, const char* format,
+ const std::tm* time) {
+ return std::strftime(str, count, format, time);
+}
+
+inline size_t strftime(wchar_t* str, size_t count, const wchar_t* format,
+ const std::tm* time) {
+ return std::wcsftime(str, count, format, time);
+}
+} // namespace detail
+
+template <typename Char>
+struct formatter<std::chrono::time_point<std::chrono::system_clock>, Char>
+ : formatter<std::tm, Char> {
+ template <typename FormatContext>
+ auto format(std::chrono::time_point<std::chrono::system_clock> val,
+ FormatContext& ctx) -> decltype(ctx.out()) {
+ std::tm time = localtime(val);
+ return formatter<std::tm, Char>::format(time, ctx);
+ }
+};
+
+template <typename Char> struct formatter<std::tm, Char> {
+ template <typename ParseContext>
+ auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
+ auto it = ctx.begin();
+ if (it != ctx.end() && *it == ':') ++it;
+ auto end = it;
+ while (end != ctx.end() && *end != '}') ++end;
+ tm_format.reserve(detail::to_unsigned(end - it + 1));
+ tm_format.append(it, end);
+ tm_format.push_back('\0');
+ return end;
+ }
+
+ template <typename FormatContext>
+ auto format(const std::tm& tm, FormatContext& ctx) -> decltype(ctx.out()) {
+ basic_memory_buffer<Char> buf;
+ size_t start = buf.size();
+ for (;;) {
+ size_t size = buf.capacity() - start;
+ size_t count = detail::strftime(&buf[start], size, &tm_format[0], &tm);
+ if (count != 0) {
+ buf.resize(start + count);
+ break;
+ }
+ if (size >= tm_format.size() * 256) {
+ // If the buffer is 256 times larger than the format string, assume
+ // that `strftime` gives an empty result. There doesn't seem to be a
+ // better way to distinguish the two cases:
+ // https://github.com/fmtlib/fmt/issues/367
+ break;
+ }
+ const size_t MIN_GROWTH = 10;
+ buf.reserve(buf.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
+ }
+ return std::copy(buf.begin(), buf.end(), ctx.out());
+ }
+
+ basic_memory_buffer<Char> tm_format;
+};
+
+namespace detail {
+template <typename Period> FMT_CONSTEXPR const char* get_units() {
+ return nullptr;
+}
+template <> FMT_CONSTEXPR const char* get_units<std::atto>() { return "as"; }
+template <> FMT_CONSTEXPR const char* get_units<std::femto>() { return "fs"; }
+template <> FMT_CONSTEXPR const char* get_units<std::pico>() { return "ps"; }
+template <> FMT_CONSTEXPR const char* get_units<std::nano>() { return "ns"; }
+template <> FMT_CONSTEXPR const char* get_units<std::micro>() { return "µs"; }
+template <> FMT_CONSTEXPR const char* get_units<std::milli>() { return "ms"; }
+template <> FMT_CONSTEXPR const char* get_units<std::centi>() { return "cs"; }
+template <> FMT_CONSTEXPR const char* get_units<std::deci>() { return "ds"; }
+template <> FMT_CONSTEXPR const char* get_units<std::ratio<1>>() { return "s"; }
+template <> FMT_CONSTEXPR const char* get_units<std::deca>() { return "das"; }
+template <> FMT_CONSTEXPR const char* get_units<std::hecto>() { return "hs"; }
+template <> FMT_CONSTEXPR const char* get_units<std::kilo>() { return "ks"; }
+template <> FMT_CONSTEXPR const char* get_units<std::mega>() { return "Ms"; }
+template <> FMT_CONSTEXPR const char* get_units<std::giga>() { return "Gs"; }
+template <> FMT_CONSTEXPR const char* get_units<std::tera>() { return "Ts"; }
+template <> FMT_CONSTEXPR const char* get_units<std::peta>() { return "Ps"; }
+template <> FMT_CONSTEXPR const char* get_units<std::exa>() { return "Es"; }
+template <> FMT_CONSTEXPR const char* get_units<std::ratio<60>>() {
+ return "m";
+}
+template <> FMT_CONSTEXPR const char* get_units<std::ratio<3600>>() {
+ return "h";
+}
+
+enum class numeric_system {
+ standard,
+ // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
+ alternative
+};
+
+// Parses a put_time-like format string and invokes handler actions.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char* parse_chrono_format(const Char* begin,
+ const Char* end,
+ Handler&& handler) {
+ auto ptr = begin;
+ while (ptr != end) {
+ auto c = *ptr;
+ if (c == '}') break;
+ if (c != '%') {
+ ++ptr;
+ continue;
+ }
+ if (begin != ptr) handler.on_text(begin, ptr);
+ ++ptr; // consume '%'
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case '%':
+ handler.on_text(ptr - 1, ptr);
+ break;
+ case 'n': {
+ const Char newline[] = {'\n'};
+ handler.on_text(newline, newline + 1);
+ break;
+ }
+ case 't': {
+ const Char tab[] = {'\t'};
+ handler.on_text(tab, tab + 1);
+ break;
+ }
+ // Day of the week:
+ case 'a':
+ handler.on_abbr_weekday();
+ break;
+ case 'A':
+ handler.on_full_weekday();
+ break;
+ case 'w':
+ handler.on_dec0_weekday(numeric_system::standard);
+ break;
+ case 'u':
+ handler.on_dec1_weekday(numeric_system::standard);
+ break;
+ // Month:
+ case 'b':
+ handler.on_abbr_month();
+ break;
+ case 'B':
+ handler.on_full_month();
+ break;
+ // Hour, minute, second:
+ case 'H':
+ handler.on_24_hour(numeric_system::standard);
+ break;
+ case 'I':
+ handler.on_12_hour(numeric_system::standard);
+ break;
+ case 'M':
+ handler.on_minute(numeric_system::standard);
+ break;
+ case 'S':
+ handler.on_second(numeric_system::standard);
+ break;
+ // Other:
+ case 'c':
+ handler.on_datetime(numeric_system::standard);
+ break;
+ case 'x':
+ handler.on_loc_date(numeric_system::standard);
+ break;
+ case 'X':
+ handler.on_loc_time(numeric_system::standard);
+ break;
+ case 'D':
+ handler.on_us_date();
+ break;
+ case 'F':
+ handler.on_iso_date();
+ break;
+ case 'r':
+ handler.on_12_hour_time();
+ break;
+ case 'R':
+ handler.on_24_hour_time();
+ break;
+ case 'T':
+ handler.on_iso_time();
+ break;
+ case 'p':
+ handler.on_am_pm();
+ break;
+ case 'Q':
+ handler.on_duration_value();
+ break;
+ case 'q':
+ handler.on_duration_unit();
+ break;
+ case 'z':
+ handler.on_utc_offset();
+ break;
+ case 'Z':
+ handler.on_tz_name();
+ break;
+ // Alternative representation:
+ case 'E': {
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case 'c':
+ handler.on_datetime(numeric_system::alternative);
+ break;
+ case 'x':
+ handler.on_loc_date(numeric_system::alternative);
+ break;
+ case 'X':
+ handler.on_loc_time(numeric_system::alternative);
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ break;
+ }
+ case 'O':
+ if (ptr == end) FMT_THROW(format_error("invalid format"));
+ c = *ptr++;
+ switch (c) {
+ case 'w':
+ handler.on_dec0_weekday(numeric_system::alternative);
+ break;
+ case 'u':
+ handler.on_dec1_weekday(numeric_system::alternative);
+ break;
+ case 'H':
+ handler.on_24_hour(numeric_system::alternative);
+ break;
+ case 'I':
+ handler.on_12_hour(numeric_system::alternative);
+ break;
+ case 'M':
+ handler.on_minute(numeric_system::alternative);
+ break;
+ case 'S':
+ handler.on_second(numeric_system::alternative);
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ break;
+ default:
+ FMT_THROW(format_error("invalid format"));
+ }
+ begin = ptr;
+ }
+ if (begin != ptr) handler.on_text(begin, ptr);
+ return ptr;
+}
+
+struct chrono_format_checker {
+ FMT_NORETURN void report_no_date() { FMT_THROW(format_error("no date")); }
+
+ template <typename Char> void on_text(const Char*, const Char*) {}
+ FMT_NORETURN void on_abbr_weekday() { report_no_date(); }
+ FMT_NORETURN void on_full_weekday() { report_no_date(); }
+ FMT_NORETURN void on_dec0_weekday(numeric_system) { report_no_date(); }
+ FMT_NORETURN void on_dec1_weekday(numeric_system) { report_no_date(); }
+ FMT_NORETURN void on_abbr_month() { report_no_date(); }
+ FMT_NORETURN void on_full_month() { report_no_date(); }
+ void on_24_hour(numeric_system) {}
+ void on_12_hour(numeric_system) {}
+ void on_minute(numeric_system) {}
+ void on_second(numeric_system) {}
+ FMT_NORETURN void on_datetime(numeric_system) { report_no_date(); }
+ FMT_NORETURN void on_loc_date(numeric_system) { report_no_date(); }
+ FMT_NORETURN void on_loc_time(numeric_system) { report_no_date(); }
+ FMT_NORETURN void on_us_date() { report_no_date(); }
+ FMT_NORETURN void on_iso_date() { report_no_date(); }
+ void on_12_hour_time() {}
+ void on_24_hour_time() {}
+ void on_iso_time() {}
+ void on_am_pm() {}
+ void on_duration_value() {}
+ void on_duration_unit() {}
+ FMT_NORETURN void on_utc_offset() { report_no_date(); }
+ FMT_NORETURN void on_tz_name() { report_no_date(); }
+};
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline bool isnan(T) {
+ return false;
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline bool isnan(T value) {
+ return std::isnan(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline bool isfinite(T) {
+ return true;
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline bool isfinite(T value) {
+ return std::isfinite(value);
+}
+
+// Converts value to int and checks that it's in the range [0, upper).
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline int to_nonnegative_int(T value, int upper) {
+ FMT_ASSERT(value >= 0 && value <= upper, "invalid value");
+ (void)upper;
+ return static_cast<int>(value);
+}
+template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
+inline int to_nonnegative_int(T value, int upper) {
+ FMT_ASSERT(
+ std::isnan(value) || (value >= 0 && value <= static_cast<T>(upper)),
+ "invalid value");
+ (void)upper;
+ return static_cast<int>(value);
+}
+
+template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
+inline T mod(T x, int y) {
+ return x % static_cast<T>(y);
+}
+template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
+inline T mod(T x, int y) {
+ return std::fmod(x, static_cast<T>(y));
+}
+
+// If T is an integral type, maps T to its unsigned counterpart, otherwise
+// leaves it unchanged (unlike std::make_unsigned).
+template <typename T, bool INTEGRAL = std::is_integral<T>::value>
+struct make_unsigned_or_unchanged {
+ using type = T;
+};
+
+template <typename T> struct make_unsigned_or_unchanged<T, true> {
+ using type = typename std::make_unsigned<T>::type;
+};
+
+#if FMT_SAFE_DURATION_CAST
+// throwing version of safe_duration_cast
+template <typename To, typename FromRep, typename FromPeriod>
+To fmt_safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) {
+ int ec;
+ To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
+ if (ec) FMT_THROW(format_error("cannot format duration"));
+ return to;
+}
+#endif
+
+template <typename Rep, typename Period,
+ FMT_ENABLE_IF(std::is_integral<Rep>::value)>
+inline std::chrono::duration<Rep, std::milli> get_milliseconds(
+ std::chrono::duration<Rep, Period> d) {
+ // this may overflow and/or the result may not fit in the
+ // target type.
+#if FMT_SAFE_DURATION_CAST
+ using CommonSecondsType =
+ typename std::common_type<decltype(d), std::chrono::seconds>::type;
+ const auto d_as_common = fmt_safe_duration_cast<CommonSecondsType>(d);
+ const auto d_as_whole_seconds =
+ fmt_safe_duration_cast<std::chrono::seconds>(d_as_common);
+ // this conversion should be nonproblematic
+ const auto diff = d_as_common - d_as_whole_seconds;
+ const auto ms =
+ fmt_safe_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
+ return ms;
+#else
+ auto s = std::chrono::duration_cast<std::chrono::seconds>(d);
+ return std::chrono::duration_cast<std::chrono::milliseconds>(d - s);
+#endif
+}
+
+template <typename Rep, typename Period,
+ FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
+inline std::chrono::duration<Rep, std::milli> get_milliseconds(
+ std::chrono::duration<Rep, Period> d) {
+ using common_type = typename std::common_type<Rep, std::intmax_t>::type;
+ auto ms = mod(d.count() * static_cast<common_type>(Period::num) /
+ static_cast<common_type>(Period::den) * 1000,
+ 1000);
+ return std::chrono::duration<Rep, std::milli>(static_cast<Rep>(ms));
+}
+
+template <typename Char, typename Rep, typename OutputIt>
+OutputIt format_duration_value(OutputIt out, Rep val, int precision) {
+ const Char pr_f[] = {'{', ':', '.', '{', '}', 'f', '}', 0};
+ if (precision >= 0) return format_to(out, pr_f, val, precision);
+ const Char fp_f[] = {'{', ':', 'g', '}', 0};
+ const Char format[] = {'{', '}', 0};
+ return format_to(out, std::is_floating_point<Rep>::value ? fp_f : format,
+ val);
+}
+template <typename Char, typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, Char) {
+ return std::copy(unit.begin(), unit.end(), out);
+}
+
+template <typename OutputIt>
+OutputIt copy_unit(string_view unit, OutputIt out, wchar_t) {
+ // This works when wchar_t is UTF-32 because units only contain characters
+ // that have the same representation in UTF-16 and UTF-32.
+ utf8_to_utf16 u(unit);
+ return std::copy(u.c_str(), u.c_str() + u.size(), out);
+}
+
+template <typename Char, typename Period, typename OutputIt>
+OutputIt format_duration_unit(OutputIt out) {
+ if (const char* unit = get_units<Period>())
+ return copy_unit(string_view(unit), out, Char());
+ const Char num_f[] = {'[', '{', '}', ']', 's', 0};
+ if (const_check(Period::den == 1)) return format_to(out, num_f, Period::num);
+ const Char num_def_f[] = {'[', '{', '}', '/', '{', '}', ']', 's', 0};
+ return format_to(out, num_def_f, Period::num, Period::den);
+}
+
+template <typename FormatContext, typename OutputIt, typename Rep,
+ typename Period>
+struct chrono_formatter {
+ FormatContext& context;
+ OutputIt out;
+ int precision;
+ // rep is unsigned to avoid overflow.
+ using rep =
+ conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
+ unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
+ rep val;
+ using seconds = std::chrono::duration<rep>;
+ seconds s;
+ using milliseconds = std::chrono::duration<rep, std::milli>;
+ bool negative;
+
+ using char_type = typename FormatContext::char_type;
+
+ explicit chrono_formatter(FormatContext& ctx, OutputIt o,
+ std::chrono::duration<Rep, Period> d)
+ : context(ctx),
+ out(o),
+ val(static_cast<rep>(d.count())),
+ negative(false) {
+ if (d.count() < 0) {
+ val = 0 - val;
+ negative = true;
+ }
+
+ // this may overflow and/or the result may not fit in the
+ // target type.
+#if FMT_SAFE_DURATION_CAST
+ // might need checked conversion (rep!=Rep)
+ auto tmpval = std::chrono::duration<rep, Period>(val);
+ s = fmt_safe_duration_cast<seconds>(tmpval);
+#else
+ s = std::chrono::duration_cast<seconds>(
+ std::chrono::duration<rep, Period>(val));
+#endif
+ }
+
+ // returns true if nan or inf, writes to out.
+ bool handle_nan_inf() {
+ if (isfinite(val)) {
+ return false;
+ }
+ if (isnan(val)) {
+ write_nan();
+ return true;
+ }
+ // must be +-inf
+ if (val > 0) {
+ write_pinf();
+ } else {
+ write_ninf();
+ }
+ return true;
+ }
+
+ Rep hour() const { return static_cast<Rep>(mod((s.count() / 3600), 24)); }
+
+ Rep hour12() const {
+ Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
+ return hour <= 0 ? 12 : hour;
+ }
+
+ Rep minute() const { return static_cast<Rep>(mod((s.count() / 60), 60)); }
+ Rep second() const { return static_cast<Rep>(mod(s.count(), 60)); }
+
+ std::tm time() const {
+ auto time = std::tm();
+ time.tm_hour = to_nonnegative_int(hour(), 24);
+ time.tm_min = to_nonnegative_int(minute(), 60);
+ time.tm_sec = to_nonnegative_int(second(), 60);
+ return time;
+ }
+
+ void write_sign() {
+ if (negative) {
+ *out++ = '-';
+ negative = false;
+ }
+ }
+
+ void write(Rep value, int width) {
+ write_sign();
+ if (isnan(value)) return write_nan();
+ uint32_or_64_or_128_t<int> n =
+ to_unsigned(to_nonnegative_int(value, max_value<int>()));
+ int num_digits = detail::count_digits(n);
+ if (width > num_digits) out = std::fill_n(out, width - num_digits, '0');
+ out = format_decimal<char_type>(out, n, num_digits).end;
+ }
+
+ void write_nan() { std::copy_n("nan", 3, out); }
+ void write_pinf() { std::copy_n("inf", 3, out); }
+ void write_ninf() { std::copy_n("-inf", 4, out); }
+
+ void format_localized(const tm& time, char format, char modifier = 0) {
+ if (isnan(val)) return write_nan();
+ auto locale = context.locale().template get<std::locale>();
+ auto& facet = std::use_facet<std::time_put<char_type>>(locale);
+ std::basic_ostringstream<char_type> os;
+ os.imbue(locale);
+ facet.put(os, os, ' ', &time, format, modifier);
+ auto str = os.str();
+ std::copy(str.begin(), str.end(), out);
+ }
+
+ void on_text(const char_type* begin, const char_type* end) {
+ std::copy(begin, end, out);
+ }
+
+ // These are not implemented because durations don't have date information.
+ void on_abbr_weekday() {}
+ void on_full_weekday() {}
+ void on_dec0_weekday(numeric_system) {}
+ void on_dec1_weekday(numeric_system) {}
+ void on_abbr_month() {}
+ void on_full_month() {}
+ void on_datetime(numeric_system) {}
+ void on_loc_date(numeric_system) {}
+ void on_loc_time(numeric_system) {}
+ void on_us_date() {}
+ void on_iso_date() {}
+ void on_utc_offset() {}
+ void on_tz_name() {}
+
+ void on_24_hour(numeric_system ns) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(hour(), 2);
+ auto time = tm();
+ time.tm_hour = to_nonnegative_int(hour(), 24);
+ format_localized(time, 'H', 'O');
+ }
+
+ void on_12_hour(numeric_system ns) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(hour12(), 2);
+ auto time = tm();
+ time.tm_hour = to_nonnegative_int(hour12(), 12);
+ format_localized(time, 'I', 'O');
+ }
+
+ void on_minute(numeric_system ns) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) return write(minute(), 2);
+ auto time = tm();
+ time.tm_min = to_nonnegative_int(minute(), 60);
+ format_localized(time, 'M', 'O');
+ }
+
+ void on_second(numeric_system ns) {
+ if (handle_nan_inf()) return;
+
+ if (ns == numeric_system::standard) {
+ write(second(), 2);
+#if FMT_SAFE_DURATION_CAST
+ // convert rep->Rep
+ using duration_rep = std::chrono::duration<rep, Period>;
+ using duration_Rep = std::chrono::duration<Rep, Period>;
+ auto tmpval = fmt_safe_duration_cast<duration_Rep>(duration_rep{val});
+#else
+ auto tmpval = std::chrono::duration<Rep, Period>(val);
+#endif
+ auto ms = get_milliseconds(tmpval);
+ if (ms != std::chrono::milliseconds(0)) {
+ *out++ = '.';
+ write(ms.count(), 3);
+ }
+ return;
+ }
+ auto time = tm();
+ time.tm_sec = to_nonnegative_int(second(), 60);
+ format_localized(time, 'S', 'O');
+ }
+
+ void on_12_hour_time() {
+ if (handle_nan_inf()) return;
+ format_localized(time(), 'r');
+ }
+
+ void on_24_hour_time() {
+ if (handle_nan_inf()) {
+ *out++ = ':';
+ handle_nan_inf();
+ return;
+ }
+
+ write(hour(), 2);
+ *out++ = ':';
+ write(minute(), 2);
+ }
+
+ void on_iso_time() {
+ on_24_hour_time();
+ *out++ = ':';
+ if (handle_nan_inf()) return;
+ write(second(), 2);
+ }
+
+ void on_am_pm() {
+ if (handle_nan_inf()) return;
+ format_localized(time(), 'p');
+ }
+
+ void on_duration_value() {
+ if (handle_nan_inf()) return;
+ write_sign();
+ out = format_duration_value<char_type>(out, val, precision);
+ }
+
+ void on_duration_unit() {
+ out = format_duration_unit<char_type, Period>(out);
+ }
+};
+} // namespace detail
+
+template <typename Rep, typename Period, typename Char>
+struct formatter<std::chrono::duration<Rep, Period>, Char> {
+ private:
+ basic_format_specs<Char> specs;
+ int precision;
+ using arg_ref_type = detail::arg_ref<Char>;
+ arg_ref_type width_ref;
+ arg_ref_type precision_ref;
+ mutable basic_string_view<Char> format_str;
+ using duration = std::chrono::duration<Rep, Period>;
+
+ struct spec_handler {
+ formatter& f;
+ basic_format_parse_context<Char>& context;
+ basic_string_view<Char> format_str;
+
+ template <typename Id> FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
+ context.check_arg_id(arg_id);
+ return arg_ref_type(arg_id);
+ }
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(basic_string_view<Char> arg_id) {
+ context.check_arg_id(arg_id);
+ return arg_ref_type(arg_id);
+ }
+
+ FMT_CONSTEXPR arg_ref_type make_arg_ref(detail::auto_id) {
+ return arg_ref_type(context.next_arg_id());
+ }
+
+ void on_error(const char* msg) { FMT_THROW(format_error(msg)); }
+ void on_fill(basic_string_view<Char> fill) { f.specs.fill = fill; }
+ void on_align(align_t align) { f.specs.align = align; }
+ void on_width(int width) { f.specs.width = width; }
+ void on_precision(int _precision) { f.precision = _precision; }
+ void end_precision() {}
+
+ template <typename Id> void on_dynamic_width(Id arg_id) {
+ f.width_ref = make_arg_ref(arg_id);
+ }
+
+ template <typename Id> void on_dynamic_precision(Id arg_id) {
+ f.precision_ref = make_arg_ref(arg_id);
+ }
+ };
+
+ using iterator = typename basic_format_parse_context<Char>::iterator;
+ struct parse_range {
+ iterator begin;
+ iterator end;
+ };
+
+ FMT_CONSTEXPR parse_range do_parse(basic_format_parse_context<Char>& ctx) {
+ auto begin = ctx.begin(), end = ctx.end();
+ if (begin == end || *begin == '}') return {begin, begin};
+ spec_handler handler{*this, ctx, format_str};
+ begin = detail::parse_align(begin, end, handler);
+ if (begin == end) return {begin, begin};
+ begin = detail::parse_width(begin, end, handler);
+ if (begin == end) return {begin, begin};
+ if (*begin == '.') {
+ if (std::is_floating_point<Rep>::value)
+ begin = detail::parse_precision(begin, end, handler);
+ else
+ handler.on_error("precision not allowed for this argument type");
+ }
+ end = parse_chrono_format(begin, end, detail::chrono_format_checker());
+ return {begin, end};
+ }
+
+ public:
+ formatter() : precision(-1) {}
+
+ FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
+ -> decltype(ctx.begin()) {
+ auto range = do_parse(ctx);
+ format_str = basic_string_view<Char>(
+ &*range.begin, detail::to_unsigned(range.end - range.begin));
+ return range.end;
+ }
+
+ template <typename FormatContext>
+ auto format(const duration& d, FormatContext& ctx) -> decltype(ctx.out()) {
+ auto begin = format_str.begin(), end = format_str.end();
+ // As a possible future optimization, we could avoid extra copying if width
+ // is not specified.
+ basic_memory_buffer<Char> buf;
+ auto out = std::back_inserter(buf);
+ detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref,
+ ctx);
+ detail::handle_dynamic_spec<detail::precision_checker>(precision,
+ precision_ref, ctx);
+ if (begin == end || *begin == '}') {
+ out = detail::format_duration_value<Char>(out, d.count(), precision);
+ detail::format_duration_unit<Char, Period>(out);
+ } else {
+ detail::chrono_formatter<FormatContext, decltype(out), Rep, Period> f(
+ ctx, out, d);
+ f.precision = precision;
+ parse_chrono_format(begin, end, f);
+ }
+ return detail::write(
+ ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
+ }
+};
+
+FMT_END_NAMESPACE
+
+#endif // FMT_CHRONO_H_
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