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77 lines
2.2 KiB
C++
77 lines
2.2 KiB
C++
#include <cmath>
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#include <ctime>
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#include <xlnt/utils/timedelta.hpp>
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namespace xlnt {
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timedelta::timedelta() : timedelta(0, 0, 0, 0, 0)
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{
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}
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timedelta::timedelta(int days_, int hours_, int minutes_, int seconds_, int microseconds_)
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: days(days_),
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hours(hours_),
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minutes(minutes_),
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seconds(seconds_),
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microseconds(microseconds_)
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{
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}
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long double timedelta::to_number() const
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{
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std::uint64_t total_microseconds = static_cast<std::uint64_t>(microseconds);
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total_microseconds += static_cast<std::uint64_t>(seconds * 1e6);
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total_microseconds += static_cast<std::uint64_t>(minutes * 1e6 * 60);
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auto microseconds_per_hour = static_cast<std::uint64_t>(1e6) * 60 * 60;
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total_microseconds += static_cast<std::uint64_t>(hours) * microseconds_per_hour;
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auto number = total_microseconds / (24.0L * microseconds_per_hour);
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auto hundred_billion = static_cast<std::uint64_t>(1e9) * 100;
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number = std::floor(number * hundred_billion + 0.5L) / hundred_billion;
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number += days;
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return number;
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}
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timedelta timedelta::from_number(long double raw_time)
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{
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timedelta result;
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long double integer_part;
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long double fractional_part = std::modf(raw_time, &integer_part);
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result.days = static_cast<int>(integer_part);
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fractional_part *= 24;
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result.hours = (int)fractional_part;
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fractional_part = 60 * (fractional_part - result.hours);
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result.minutes = (int)fractional_part;
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fractional_part = 60 * (fractional_part - result.minutes);
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result.seconds = (int)fractional_part;
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fractional_part = 1000000 * (fractional_part - result.seconds);
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result.microseconds = (int)fractional_part;
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if (result.microseconds == 999999 && fractional_part - result.microseconds > 0.5)
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{
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result.microseconds = 0;
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result.seconds += 1;
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if (result.seconds == 60)
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{
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result.seconds = 0;
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result.minutes += 1;
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//TODO: too much nesting
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if (result.minutes == 60)
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{
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result.minutes = 0;
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result.hours += 1;
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}
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}
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}
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return result;
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}
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} // namespace xlnt
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