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Rust SystemTime conversion to unixtime in nanoseconds
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| trait SystemTimeToUnixTime { | |
| fn unixtime(&self) -> i64; | |
| fn unixtime_ns(&self) -> i64; | |
| } | |
| impl SystemTimeToUnixTime for std::time::SystemTime { | |
| fn unixtime(&self) -> i64 { | |
| match self.duration_since(std::time::SystemTime::UNIX_EPOCH) { | |
| Ok(n) => n.as_secs().try_into().unwrap_or(i64::MAX), | |
| Err(t) => t.duration().as_secs().try_into().map(|t: i64| -t).unwrap_or(i64::MIN), | |
| } | |
| } | |
| fn unixtime_ns(&self) -> i64 { | |
| match self.duration_since(std::time::SystemTime::UNIX_EPOCH) { | |
| Ok(n) => n.as_nanos().try_into().unwrap_or(i64::MAX), | |
| Err(t) => t.duration().as_nanos().try_into().map(|t: i64| -t).unwrap_or(i64::MIN), | |
| } | |
| } | |
| } | |
| fn main() { | |
| use std::time::{SystemTime, Duration}; | |
| // let now = SystemTime::now(); | |
| let now = SystemTime::UNIX_EPOCH - Duration::from_millis(10543); | |
| println!("seconds since epoch: {}", now.unixtime_ns() as f64 / 1_000_000_000f64); | |
| } |
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