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84 lines
2.5 KiB
C++
84 lines
2.5 KiB
C++
#include <cmath>
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#include <ctime>
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#include <xlnt/utils/time.hpp>
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namespace xlnt {
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time time::from_number(long double raw_time)
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{
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time result;
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double integer_part;
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double fractional_part = std::modf((double)raw_time, &integer_part);
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fractional_part *= 24;
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result.hour = (int)fractional_part;
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fractional_part = 60 * (fractional_part - result.hour);
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result.minute = (int)fractional_part;
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fractional_part = 60 * (fractional_part - result.minute);
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result.second = (int)fractional_part;
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fractional_part = 1000000 * (fractional_part - result.second);
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result.microsecond = (int)fractional_part;
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if (result.microsecond == 999999 && fractional_part - result.microsecond > 0.5)
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{
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result.microsecond = 0;
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result.second += 1;
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if (result.second == 60)
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{
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result.second = 0;
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result.minute += 1;
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//TODO: too much nesting
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if (result.minute == 60)
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{
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result.minute = 0;
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result.hour += 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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bool time::operator==(const time &comparand) const
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{
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return hour == comparand.hour && minute == comparand.minute && second == comparand.second &&
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microsecond == comparand.microsecond;
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}
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time::time(const std::string &time_string) : hour(0), minute(0), second(0), microsecond(0)
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{
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std::string remaining = time_string;
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auto colon_index = remaining.find(':');
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hour = std::stoi(remaining.substr(0, colon_index));
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remaining = remaining.substr(colon_index + 1);
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colon_index = remaining.find(':');
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minute = std::stoi(remaining.substr(0, colon_index));
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colon_index = remaining.find(':');
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if (colon_index != std::string::npos)
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{
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remaining = remaining.substr(colon_index + 1);
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second = std::stoi(remaining);
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}
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}
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long double time::to_number() const
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{
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std::uint64_t microseconds = static_cast<std::uint64_t>(microsecond);
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microseconds += static_cast<std::uint64_t>(second * 1e6);
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microseconds += static_cast<std::uint64_t>(minute * 1e6 * 60);
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auto microseconds_per_hour = static_cast<std::uint64_t>(1e6) * 60 * 60;
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microseconds += static_cast<std::uint64_t>(hour) * microseconds_per_hour;
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auto number = 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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return number;
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}
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} // namespace xlnt
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