mirror of https://github.com/briansmith/webpki
66 lines
2.3 KiB
Rust
66 lines
2.3 KiB
Rust
// Copyright 2015-2016 Brian Smith.
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//! Conversions into the library's time type.
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/// The time type.
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///
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/// Internally this is merely a UNIX timestamp: a count of non-leap
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/// seconds since the start of 1970. This type exists to assist
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/// unit-of-measure correctness.
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#[derive(Debug, Clone, Copy, PartialEq, PartialOrd)]
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pub struct Time(u64);
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impl Time {
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/// Create a `webpki::Time` from a unix timestamp.
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///
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/// It is usually better to use the less error-prone
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/// `webpki::Time::try_from(time: std::time::SystemTime)` instead when
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/// `std::time::SystemTime` is available (when `#![no_std]` isn't being
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/// used).
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#[allow(clippy::must_use_candidate)]
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pub fn from_seconds_since_unix_epoch(secs: u64) -> Self {
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Self(secs)
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}
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}
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#[cfg(feature = "std")]
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impl core::convert::TryFrom<std::time::SystemTime> for Time {
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type Error = std::time::SystemTimeError;
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/// Create a `webpki::Time` from a `std::time::SystemTime`.
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///
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/// # Example:
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///
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/// Construct a `webpki::Time` from the current system time:
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///
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/// ```
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/// # extern crate ring;
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/// # extern crate webpki;
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/// #
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/// #![cfg(feature = "std")]
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/// use std::{convert::TryFrom, time::{SystemTime, SystemTimeError}};
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///
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/// # fn foo() -> Result<(), SystemTimeError> {
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/// let time = webpki::Time::try_from(SystemTime::now())?;
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/// # Ok(())
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/// # }
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/// ```
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fn try_from(value: std::time::SystemTime) -> Result<Self, Self::Error> {
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value
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.duration_since(std::time::UNIX_EPOCH)
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.map(|d| Self::from_seconds_since_unix_epoch(d.as_secs()))
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}
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}
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