diff options
Diffstat (limited to 'rustversion/src/time.rs')
-rw-r--r-- | rustversion/src/time.rs | 44 |
1 files changed, 0 insertions, 44 deletions
diff --git a/rustversion/src/time.rs b/rustversion/src/time.rs deleted file mode 100644 index 1e6dd90..0000000 --- a/rustversion/src/time.rs +++ /dev/null @@ -1,44 +0,0 @@ -use crate::date::Date; -use std::time::{SystemTime, UNIX_EPOCH}; - -// Timestamp of 2016-03-01 00:00:00 in UTC. -const BASE: u64 = 1456790400; -const BASE_YEAR: u16 = 2016; -const BASE_MONTH: u8 = 3; - -// Days between leap days. -const CYCLE: u64 = 365 * 4 + 1; - -const DAYS_BY_MONTH: [u8; 12] = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]; - -pub fn today() -> Date { - let default = Date { - year: 2019, - month: 1, - day: 1, - }; - try_today().unwrap_or(default) -} - -fn try_today() -> Option<Date> { - let now = SystemTime::now(); - let since_epoch = now.duration_since(UNIX_EPOCH).ok()?; - let secs = since_epoch.as_secs(); - - let approx_days = secs.checked_sub(BASE)? / 60 / 60 / 24; - let cycle = approx_days / CYCLE; - let mut rem = approx_days % CYCLE; - - let mut year = BASE_YEAR + cycle as u16 * 4; - let mut month = BASE_MONTH; - loop { - let days_in_month = DAYS_BY_MONTH[month as usize - 1]; - if rem < days_in_month as u64 { - let day = rem as u8 + 1; - return Some(Date { year, month, day }); - } - rem -= days_in_month as u64; - year += (month == 12) as u16; - month = month % 12 + 1; - } -} |