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32 lines
1.1 KiB
Rust
32 lines
1.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use std::time::Duration;
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use std::{u32, u64};
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pub const NANOS_PER_SEC: u32 = 1_000_000_000;
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pub fn duration_from_seconds(secs: f64) -> Duration {
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// Get number of seconds and check that it fits in a u64.
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let whole_secs = secs.trunc();
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assert!(whole_secs >= 0.0 && whole_secs <= u64::MAX as f64);
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// Get number of nanoseconds. This should always fit in a u32, but check anyway.
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let nanos = (secs.fract() * (NANOS_PER_SEC as f64)).trunc();
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assert!(nanos >= 0.0 && nanos <= u32::MAX as f64);
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Duration::new(whole_secs as u64, nanos as u32)
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}
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pub fn duration_from_nanoseconds(nanos: u64) -> Duration {
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// Get number of seconds.
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let secs = nanos / NANOS_PER_SEC as u64;
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// Get number of extra nanoseconds. This should always fit in a u32, but check anyway.
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let subsec_nanos = nanos % NANOS_PER_SEC as u64;
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assert!(subsec_nanos <= u32::MAX as u64);
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Duration::new(secs, subsec_nanos as u32)
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}
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