Function datealgo::datetime_to_systemtime

pub fn datetime_to_systemtime(
    (y, m, d, hh, mm, ss, nsec): (i32, u8, u8, u8, u8, u8, u32)
) -> Option<SystemTime>

Convert year, month, day, hours, minutes, seconds and nanoseconds to std::time::SystemTime

Given a (year, month, day, hours, minutes, seconds, nanoseconds) tuple from Unix epoch (January 1st, 1970) returns Option of std::time::SystemTime.

Errors

Returns None if given datetime cannot be represented as SystemTime.

Panics

Year must be between YEAR_MIN and YEAR_MAX. Month must be between 1 and 12. Day must be between 1 and the number of days in the month in question. Hours must be between 0 and 23. Minutes must be between 0 and 59. Seconds must be between 0 and 59. Nanoseconds must be between 0 and 999_999_999. Bounds are checked using debug_assert only, so that the checks are not present in release builds, similar to integer overflow checks.

Examples

use datealgo::datetime_to_systemtime;
use std::time::{Duration, UNIX_EPOCH};

assert_eq!(datetime_to_systemtime((1970, 1, 1, 0, 0, 0, 0)), Some(UNIX_EPOCH));
assert_eq!(datetime_to_systemtime((1970, 1, 1, 0, 0, 1, 0)), UNIX_EPOCH.checked_add(Duration::new(1, 0)));
assert_eq!(datetime_to_systemtime((2023, 5, 20, 9, 24, 38, 0)), UNIX_EPOCH.checked_add(Duration::from_secs(1684574678)));

Algorithm

Combination of existing functions for convenience only.