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chrono: add to_system() variants for Windows

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Signed-off-by: Simon Rozman <simon@rozman.si>
This commit is contained in:
Simon Rozman 2024-10-21 12:49:08 +02:00
parent 16e2384419
commit e442f4f502
1 changed files with 89 additions and 0 deletions
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89
include/stdex/chrono.hpp
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@ -99,6 +99,49 @@ namespace stdex {
}
#endif
#ifdef _WIN32
///
/// Converts time point to SYSTEMTIME
///
static void to_system(_In_ time_point tp, _Out_ SYSTEMTIME& t)
{
uint8_t day, month;
int32_t year;
to_dmy(tp, &day, &month, &year);
t.wDay = day;
t.wMonth = month;
if (year > WORD_MAX) _Unlikely_
throw std::range_error("year too big");
t.wYear = static_cast<WORD>(year);
t.wDayOfWeek = static_cast<int>(day_of_week(tp) + 1) % 7;
t.wHour = 0;
t.wMinute = 0;
t.wSecond = 0;
t.wMilliseconds = 0;
}
///
/// Returns time point from FILETIME
///
static void to_system(_In_ time_point tp, _Out_ FILETIME& t) noexcept
{
uint64_t x = (tp.time_since_epoch().count() - 2305814) * 864000000000; // Adjust epoch and convert 1-day interval to 100 ns
t.dwHighDateTime = static_cast<DWORD>(x >> 32);
t.dwLowDateTime = static_cast<DWORD>(x & 0xffffffff);
}
///
/// Returns time point from DATE
///
static void to_system(_In_ time_point tp, _Out_ DATE& t)
{
SYSTEMTIME st;
to_system(tp, st);
if (!SystemTimeToVariantTime(&st, &t))
throw std::invalid_argument("failed to convert date to VARIANT_DATE");
}
#endif
///
/// Returns time point from calendar day, month and year
///
@ -277,6 +320,52 @@ namespace stdex {
date.tm_isdst = 0;
}
#ifdef _WIN32
///
/// Converts time point to SYSTEMTIME
///
static void to_system(_In_ time_point tp, _Out_ SYSTEMTIME& t)
{
uint8_t day, month, hour, minute, second;
uint16_t millisecond;
int32_t year;
to_dmy(tp,
&day, &month, &year,
&hour, &minute, &second, &millisecond);
t.wDay = day;
t.wMonth = month;
if (year > WORD_MAX) _Unlikely_
throw std::range_error("year too big");
t.wYear = static_cast<WORD>(year);
t.wDayOfWeek = (static_cast<int>(aosn_date::day_of_week(to_date(tp))) + 1) % 7;
t.wHour = hour;
t.wMinute = minute;
t.wSecond = second;
t.wMilliseconds = millisecond;
}
///
/// Returns time point from FILETIME
///
static void to_system(_In_ time_point tp, _Out_ FILETIME& t) noexcept
{
uint64_t x = (tp.time_since_epoch().count() - 199222329600000) * 10000; // Adjust epoch and convert 1 ms interval to 100 ns
t.dwHighDateTime = static_cast<DWORD>(x >> 32);
t.dwLowDateTime = static_cast<DWORD>(x & 0xffffffff);
}
///
/// Returns time point from DATE
///
static void to_system(_In_ time_point tp, _Out_ DATE& t)
{
SYSTEMTIME st;
to_system(tp, st);
if (!SystemTimeToVariantTime(&st, &t))
throw std::invalid_argument("failed to convert date to VARIANT_DATE");
}
#endif
///
/// Returns aosn_date::time_point from time point
///