mirror of
https://github.com/shadps4-emu/ext-fmt.git
synced 2024-12-04 00:01:06 +00:00
Support formatting of subseconds (#3115)
* Timestamp formatting shall print also subseconds, fixed a bug for fractional durations
This commit is contained in:
Patrick Roocks
GitHub
parent
cfb34a0607
commit
9254cfa6f0
@ -966,13 +966,131 @@ inline void tzset_once() {
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}
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#endif
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template <typename OutputIt, typename Char> class tm_writer {
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// Converts value to Int and checks that it's in the range [0, upper).
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template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
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inline Int to_nonnegative_int(T value, Int upper) {
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FMT_ASSERT(std::is_unsigned<Int>::value ||
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(value >= 0 && to_unsigned(value) <= to_unsigned(upper)),
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"invalid value");
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(void)upper;
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return static_cast<Int>(value);
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}
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template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
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inline Int to_nonnegative_int(T value, Int upper) {
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if (value < 0 || value > static_cast<T>(upper))
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FMT_THROW(format_error("invalid value"));
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return static_cast<Int>(value);
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}
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template <typename Rep, typename Period,
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FMT_ENABLE_IF(std::numeric_limits<Rep>::is_signed)>
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constexpr std::chrono::duration<Rep, Period> abs(
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std::chrono::duration<Rep, Period> d) {
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// We need to compare the duration using the count() method directly
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// due to a compiler bug in clang-11 regarding the spaceship operator,
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// when -Wzero-as-null-pointer-constant is enabled.
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// In clang-12 the bug has been fixed. See
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// https://bugs.llvm.org/show_bug.cgi?id=46235 and the reproducible example:
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// https://www.godbolt.org/z/Knbb5joYx.
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return d.count() >= d.zero().count() ? d : -d;
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}
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template <typename Rep, typename Period,
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FMT_ENABLE_IF(!std::numeric_limits<Rep>::is_signed)>
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constexpr std::chrono::duration<Rep, Period> abs(
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std::chrono::duration<Rep, Period> d) {
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return d;
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}
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constexpr long long pow10(std::uint32_t n) {
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return n == 0 ? 1 : 10 * pow10(n - 1);
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}
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// Counts the number of fractional digits in the range [0, 18] according to the
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// C++20 spec. If more than 18 fractional digits are required then returns 6 for
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// microseconds precision.
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template <long long Num, long long Den, int N = 0,
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bool Enabled = (N < 19) && (Num <= max_value<long long>() / 10)>
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struct count_fractional_digits {
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static constexpr int value =
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Num % Den == 0 ? N : count_fractional_digits<Num * 10, Den, N + 1>::value;
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};
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// Base case that doesn't instantiate any more templates
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// in order to avoid overflow.
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template <long long Num, long long Den, int N>
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struct count_fractional_digits<Num, Den, N, false> {
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static constexpr int value = (Num % Den == 0) ? N : 6;
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};
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// Format subseconds which are given as an integer type with an appropriate
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// number of digits.
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template <typename Char, typename OutputIt, typename Duration>
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void write_fractional_seconds(OutputIt& out, Duration d) {
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FMT_ASSERT(!std::is_floating_point<typename Duration::rep>::value, "");
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constexpr auto num_fractional_digits =
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count_fractional_digits<Duration::period::num,
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Duration::period::den>::value;
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using subsecond_precision = std::chrono::duration<
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typename std::common_type<typename Duration::rep,
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std::chrono::seconds::rep>::type,
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std::ratio<1, detail::pow10(num_fractional_digits)>>;
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if (std::ratio_less<typename subsecond_precision::period,
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std::chrono::seconds::period>::value) {
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*out++ = '.';
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auto fractional =
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detail::abs(d) - std::chrono::duration_cast<std::chrono::seconds>(d);
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auto subseconds =
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std::chrono::treat_as_floating_point<
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typename subsecond_precision::rep>::value
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? fractional.count()
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: std::chrono::duration_cast<subsecond_precision>(fractional)
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.count();
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uint32_or_64_or_128_t<long long> n =
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to_unsigned(to_nonnegative_int(subseconds, max_value<long long>()));
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int num_digits = detail::count_digits(n);
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if (num_fractional_digits > num_digits)
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out = std::fill_n(out, num_fractional_digits - num_digits, '0');
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out = format_decimal<Char>(out, n, num_digits).end;
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}
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}
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// Format subseconds which are given as a floating point type with an appropiate
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// number of digits. We cannot pass the Duration here, as we explicitly need to
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// pass the Rep value in the chrono_formatter.
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template <typename Duration>
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void write_floating_seconds(memory_buffer& buf, Duration duration) {
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FMT_ASSERT(std::is_floating_point<typename Duration::rep>::value, "");
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auto num_fractional_digits =
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count_fractional_digits<Duration::period::num,
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Duration::period::den>::value;
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// For non-integer values, we ensure at least 6 digits to get microsecond
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// precision.
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auto val = duration.count();
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if (num_fractional_digits < 6 &&
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static_cast<typename Duration::rep>(std::round(val)) != val)
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num_fractional_digits = 6;
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format_to(
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std::back_inserter(buf), runtime("{:.{}f}"),
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std::fmod(val *
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static_cast<typename Duration::rep>(Duration::period::num) /
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static_cast<typename Duration::rep>(Duration::period::den),
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static_cast<typename Duration::rep>(60)),
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num_fractional_digits);
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}
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template <typename OutputIt, typename Char,
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typename Duration = std::chrono::seconds>
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class tm_writer {
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private:
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static constexpr int days_per_week = 7;
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const std::locale& loc_;
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const bool is_classic_;
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OutputIt out_;
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const Duration* subsecs_;
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const std::tm& tm_;
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auto tm_sec() const noexcept -> int {
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@ -1135,10 +1253,12 @@ template <typename OutputIt, typename Char> class tm_writer {
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}
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public:
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tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm)
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tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm,
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const Duration* subsecs = nullptr)
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: loc_(loc),
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is_classic_(loc_ == get_classic_locale()),
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out_(out),
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subsecs_(subsecs),
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tm_(tm) {}
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OutputIt out() const { return out_; }
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@ -1337,9 +1457,26 @@ template <typename OutputIt, typename Char> class tm_writer {
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if (is_classic_ || ns == numeric_system::standard) return write2(tm_min());
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format_localized('M', 'O');
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}
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void on_second(numeric_system ns) {
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if (is_classic_ || ns == numeric_system::standard) return write2(tm_sec());
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format_localized('S', 'O');
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if (is_classic_ || ns == numeric_system::standard) {
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write2(tm_sec());
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if (subsecs_) {
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if (std::is_floating_point<typename Duration::rep>::value) {
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auto buf = memory_buffer();
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write_floating_seconds(buf, *subsecs_);
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if (buf.size() > 1) {
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// Remove the leading "0", write something like ".123".
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out_ = std::copy(buf.begin() + 1, buf.end(), out_);
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}
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} else {
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write_fractional_seconds<Char>(out_, *subsecs_);
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}
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}
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} else {
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// Currently no formatting of subseconds when a locale is set.
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format_localized('S', 'O');
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}
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}
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void on_12_hour_time() {
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@ -1402,22 +1539,6 @@ inline bool isfinite(T) {
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return true;
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}
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// Converts value to Int and checks that it's in the range [0, upper).
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template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
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inline Int to_nonnegative_int(T value, Int upper) {
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FMT_ASSERT(std::is_unsigned<Int>::value ||
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(value >= 0 && to_unsigned(value) <= to_unsigned(upper)),
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"invalid value");
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(void)upper;
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return static_cast<Int>(value);
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}
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template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
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inline Int to_nonnegative_int(T value, Int upper) {
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if (value < 0 || value > static_cast<T>(upper))
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FMT_THROW(format_error("invalid value"));
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return static_cast<Int>(value);
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}
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template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
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inline T mod(T x, int y) {
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return x % static_cast<T>(y);
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@ -1472,47 +1593,6 @@ inline std::chrono::duration<Rep, std::milli> get_milliseconds(
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#endif
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}
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// Counts the number of fractional digits in the range [0, 18] according to the
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// C++20 spec. If more than 18 fractional digits are required then returns 6 for
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// microseconds precision.
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template <long long Num, long long Den, int N = 0,
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bool Enabled = (N < 19) && (Num <= max_value<long long>() / 10)>
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struct count_fractional_digits {
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static constexpr int value =
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Num % Den == 0 ? N : count_fractional_digits<Num * 10, Den, N + 1>::value;
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};
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// Base case that doesn't instantiate any more templates
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// in order to avoid overflow.
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template <long long Num, long long Den, int N>
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struct count_fractional_digits<Num, Den, N, false> {
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static constexpr int value = (Num % Den == 0) ? N : 6;
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};
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constexpr long long pow10(std::uint32_t n) {
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return n == 0 ? 1 : 10 * pow10(n - 1);
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}
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template <class Rep, class Period,
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FMT_ENABLE_IF(std::numeric_limits<Rep>::is_signed)>
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constexpr std::chrono::duration<Rep, Period> abs(
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std::chrono::duration<Rep, Period> d) {
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// We need to compare the duration using the count() method directly
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// due to a compiler bug in clang-11 regarding the spaceship operator,
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// when -Wzero-as-null-pointer-constant is enabled.
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// In clang-12 the bug has been fixed. See
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// https://bugs.llvm.org/show_bug.cgi?id=46235 and the reproducible example:
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// https://www.godbolt.org/z/Knbb5joYx.
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return d.count() >= d.zero().count() ? d : -d;
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}
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template <class Rep, class Period,
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FMT_ENABLE_IF(!std::numeric_limits<Rep>::is_signed)>
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constexpr std::chrono::duration<Rep, Period> abs(
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std::chrono::duration<Rep, Period> d) {
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return d;
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}
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template <typename Char, typename Rep, typename OutputIt,
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FMT_ENABLE_IF(std::is_integral<Rep>::value)>
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OutputIt format_duration_value(OutputIt out, Rep val, int) {
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@ -1673,36 +1753,6 @@ struct chrono_formatter {
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out = format_decimal<char_type>(out, n, num_digits).end;
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}
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template <typename Duration> void write_fractional_seconds(Duration d) {
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FMT_ASSERT(!std::is_floating_point<typename Duration::rep>::value, "");
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constexpr auto num_fractional_digits =
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count_fractional_digits<Duration::period::num,
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Duration::period::den>::value;
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using subsecond_precision = std::chrono::duration<
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typename std::common_type<typename Duration::rep,
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std::chrono::seconds::rep>::type,
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std::ratio<1, detail::pow10(num_fractional_digits)>>;
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if (std::ratio_less<typename subsecond_precision::period,
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std::chrono::seconds::period>::value) {
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*out++ = '.';
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auto fractional =
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detail::abs(d) - std::chrono::duration_cast<std::chrono::seconds>(d);
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auto subseconds =
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std::chrono::treat_as_floating_point<
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typename subsecond_precision::rep>::value
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? fractional.count()
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: std::chrono::duration_cast<subsecond_precision>(fractional)
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.count();
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uint32_or_64_or_128_t<long long> n =
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to_unsigned(to_nonnegative_int(subseconds, max_value<long long>()));
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int num_digits = detail::count_digits(n);
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if (num_fractional_digits > num_digits)
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out = std::fill_n(out, num_fractional_digits - num_digits, '0');
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out = format_decimal<char_type>(out, n, num_digits).end;
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}
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}
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void write_nan() { std::copy_n("nan", 3, out); }
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void write_pinf() { std::copy_n("inf", 3, out); }
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void write_ninf() { std::copy_n("-inf", 4, out); }
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@ -1780,20 +1830,15 @@ struct chrono_formatter {
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if (ns == numeric_system::standard) {
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if (std::is_floating_point<rep>::value) {
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constexpr auto num_fractional_digits =
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count_fractional_digits<Period::num, Period::den>::value;
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auto buf = memory_buffer();
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format_to(std::back_inserter(buf), runtime("{:.{}f}"),
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std::fmod(val * static_cast<rep>(Period::num) /
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static_cast<rep>(Period::den),
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static_cast<rep>(60)),
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num_fractional_digits);
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write_floating_seconds(buf, std::chrono::duration<rep, Period>(val));
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if (negative) *out++ = '-';
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if (buf.size() < 2 || buf[1] == '.') *out++ = '0';
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out = std::copy(buf.begin(), buf.end(), out);
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} else {
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write(second(), 2);
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write_fractional_seconds(std::chrono::duration<rep, Period>(val));
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write_fractional_seconds<char_type>(
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out, std::chrono::duration<Rep, Period>(val));
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}
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return;
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}
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@ -2016,28 +2061,41 @@ struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
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this->do_parse(default_specs.begin(), default_specs.end());
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}
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template <typename FormatContext>
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auto format(std::chrono::time_point<std::chrono::system_clock> val,
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template <typename FormatContext, typename Rep, typename Period>
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auto format(std::chrono::time_point<std::chrono::system_clock,
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std::chrono::duration<Rep, Period>>
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val,
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FormatContext& ctx) const -> decltype(ctx.out()) {
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return formatter<std::tm, Char>::format(localtime(val), ctx);
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if (Period::num != 1 || Period::den != 1 ||
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std::is_floating_point<Rep>::value) {
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const auto epoch = val.time_since_epoch();
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const auto subsecs =
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std::chrono::duration_cast<std::chrono::duration<Rep, Period>>(
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epoch - std::chrono::duration_cast<std::chrono::seconds>(epoch));
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return formatter<std::tm, Char>::format(
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localtime(std::chrono::time_point_cast<std::chrono::seconds>(val)),
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ctx, subsecs);
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}
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return formatter<std::tm, Char>::format(
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localtime(std::chrono::time_point_cast<std::chrono::seconds>(val)),
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ctx);
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}
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};
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#if FMT_USE_UTC_TIME
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template <typename Char, typename Duration>
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struct formatter<std::chrono::time_point<std::chrono::utc_clock, Duration>,
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Char> : formatter<std::tm, Char> {
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FMT_CONSTEXPR formatter() {
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basic_string_view<Char> default_specs =
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detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{};
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this->do_parse(default_specs.begin(), default_specs.end());
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}
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template <typename FormatContext>
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auto format(std::chrono::time_point<std::chrono::utc_clock> val,
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Char>
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: formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
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Char> {
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template <typename FormatContext, typename Duration>
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auto format(std::chrono::time_point<std::chrono::utc_clock, Duration> val,
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FormatContext& ctx) const -> decltype(ctx.out()) {
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return formatter<std::tm, Char>::format(
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localtime(std::chrono::utc_clock::to_sys(val)), ctx);
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return formatter<
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std::chrono::time_point<std::chrono::system_clock, Duration>,
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Char>::format(std::chrono::utc_clock::to_sys(val), ctx);
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}
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};
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#endif
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@ -2089,6 +2147,22 @@ template <typename Char> struct formatter<std::tm, Char> {
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detail::parse_chrono_format(specs.begin(), specs.end(), w);
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return w.out();
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}
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template <typename FormatContext, typename Duration>
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auto format(const std::tm& tm, FormatContext& ctx,
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const Duration& subsecs) const -> decltype(ctx.out()) {
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const auto loc_ref = ctx.locale();
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detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref);
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auto w = detail::tm_writer<decltype(ctx.out()), Char, Duration>(
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loc, ctx.out(), tm, &subsecs);
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if (spec_ == spec::year_month_day)
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w.on_iso_date();
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else if (spec_ == spec::hh_mm_ss)
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w.on_iso_time();
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else
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detail::parse_chrono_format(specs.begin(), specs.end(), w);
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return w.out();
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}
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};
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FMT_MODULE_EXPORT_END
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@ -253,7 +253,8 @@ template <typename TimePoint> auto strftime_full(TimePoint tp) -> std::string {
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}
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TEST(chrono_test, time_point) {
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auto t1 = std::chrono::system_clock::now();
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auto t1 = std::chrono::time_point_cast<std::chrono::seconds>(
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std::chrono::system_clock::now());
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EXPECT_EQ(strftime_full(t1), fmt::format("{:%Y-%m-%d %H:%M:%S}", t1));
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EXPECT_EQ(strftime_full(t1), fmt::format("{}", t1));
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using time_point =
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@ -634,10 +635,18 @@ TEST(chrono_test, cpp20_duration_subsecond_support) {
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// fixed precision, and print zeros even if there is no fractional part.
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EXPECT_EQ(fmt::format("{:%S}", std::chrono::microseconds{7000000}),
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"07.000000");
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EXPECT_EQ(fmt::format("{:%S}", std::chrono::duration<long long, std::ratio<1, 3>>(1)),
|
||||
EXPECT_EQ(fmt::format("{:%S}",
|
||||
std::chrono::duration<long long, std::ratio<1, 3>>(1)),
|
||||
"00.333333");
|
||||
EXPECT_EQ(fmt::format("{:%S}", std::chrono::duration<long long, std::ratio<1, 7>>(1)),
|
||||
EXPECT_EQ(fmt::format("{:%S}",
|
||||
std::chrono::duration<long long, std::ratio<1, 7>>(1)),
|
||||
"00.142857");
|
||||
|
||||
// Check that floating point seconds with ratio<1,1> are printed.
|
||||
EXPECT_EQ(fmt::format("{:%S}", std::chrono::duration<double>{1.5}),
|
||||
"01.500000");
|
||||
EXPECT_EQ(fmt::format("{:%M:%S}", std::chrono::duration<double>{-61.25}),
|
||||
"-01:01.250000");
|
||||
}
|
||||
|
||||
#endif // FMT_STATIC_THOUSANDS_SEPARATOR
|
||||
@ -652,3 +661,66 @@ TEST(chrono_test, utc_clock) {
|
||||
fmt::format("{:%Y-%m-%d %H:%M:%S}", t1_utc));
|
||||
}
|
||||
#endif
|
||||
|
||||
TEST(chrono_test, timestamps_sub_seconds) {
|
||||
std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::duration<long long, std::ratio<1, 3>>>
|
||||
t1(std::chrono::duration<long long, std::ratio<1, 3>>(4));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t1), "01.333333");
|
||||
|
||||
std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::duration<double, std::ratio<1, 3>>>
|
||||
t2(std::chrono::duration<double, std::ratio<1, 3>>(4));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t2), "01.333333");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock, std::chrono::seconds>
|
||||
t3(std::chrono::seconds(2));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t3), "02");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::duration<double>>
|
||||
t4(std::chrono::duration<double, std::ratio<1, 1>>(9.5));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t4), "09.500000");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::duration<double>>
|
||||
t5(std::chrono::duration<double, std::ratio<1, 1>>(9));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t5), "09");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::milliseconds>
|
||||
t6(std::chrono::seconds(1) + std::chrono::milliseconds(120));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t6), "01.120");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::microseconds>
|
||||
t7(std::chrono::microseconds(1234567));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t7), "01.234567");
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::nanoseconds>
|
||||
t8(std::chrono::nanoseconds(123456789));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t8), "00.123456789");
|
||||
|
||||
const auto t9 = std::chrono::time_point_cast<std::chrono::nanoseconds>(
|
||||
std::chrono::system_clock::now());
|
||||
const auto t9_sec = std::chrono::time_point_cast<std::chrono::seconds>(t9);
|
||||
auto t9_sub_sec_part = fmt::format("{0:09}", (t9 - t9_sec).count());
|
||||
|
||||
EXPECT_EQ(fmt::format("{}.{}", strftime_full(t9_sec), t9_sub_sec_part),
|
||||
fmt::format("{:%Y-%m-%d %H:%M:%S}", t9));
|
||||
|
||||
const std::chrono::time_point<std::chrono::system_clock,
|
||||
std::chrono::milliseconds>
|
||||
t10(std::chrono::milliseconds(2000));
|
||||
|
||||
EXPECT_EQ(fmt::format("{:%S}", t10), "02.000");
|
||||
}
|
||||
|
||||
@ -285,7 +285,8 @@ std::wstring system_wcsftime(const std::wstring& format, const std::tm* timeptr,
|
||||
}
|
||||
|
||||
TEST(chrono_test_wchar, time_point) {
|
||||
auto t1 = std::chrono::system_clock::now();
|
||||
auto t1 = std::chrono::time_point_cast<std::chrono::seconds>(
|
||||
std::chrono::system_clock::now());
|
||||
|
||||
std::vector<std::wstring> spec_list = {
|
||||
L"%%", L"%n", L"%t", L"%Y", L"%EY", L"%y", L"%Oy", L"%Ey", L"%C",
|
||||
|
||||
Loading…
Reference in New Issue
Block a user