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-rw-r--r--rand/rand_jitter/src/error.rs77
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diff --git a/rand/rand_jitter/src/error.rs b/rand/rand_jitter/src/error.rs
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--- a/rand/rand_jitter/src/error.rs
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-// Copyright 2018 Developers of the Rand project.
-// Copyright 2013-2015 The Rust Project Developers.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
-use rand_core::Error;
-use core::fmt;
-
-/// Base code for all `JitterRng` errors
-const ERROR_BASE: u32 = 0xAE53_0400;
-
-/// An error that can occur when [`JitterRng::test_timer`] fails.
-///
-/// All variants have a value of 0xAE530400 = 2924676096 plus a small
-/// increment (1 through 5).
-///
-/// [`JitterRng::test_timer`]: crate::JitterRng::test_timer
-#[derive(Debug, Clone, PartialEq, Eq)]
-#[repr(u32)]
-pub enum TimerError {
- /// No timer available.
- NoTimer = ERROR_BASE + 1,
- /// Timer too coarse to use as an entropy source.
- CoarseTimer = ERROR_BASE + 2,
- /// Timer is not monotonically increasing.
- NotMonotonic = ERROR_BASE + 3,
- /// Variations of deltas of time too small.
- TinyVariantions = ERROR_BASE + 4,
- /// Too many stuck results (indicating no added entropy).
- TooManyStuck = ERROR_BASE + 5,
- #[doc(hidden)]
- __Nonexhaustive,
-}
-
-impl TimerError {
- fn description(&self) -> &'static str {
- match *self {
- TimerError::NoTimer => "no timer available",
- TimerError::CoarseTimer => "coarse timer",
- TimerError::NotMonotonic => "timer not monotonic",
- TimerError::TinyVariantions => "time delta variations too small",
- TimerError::TooManyStuck => "too many stuck results",
- TimerError::__Nonexhaustive => unreachable!(),
- }
- }
-}
-
-impl fmt::Display for TimerError {
- fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
- write!(f, "{}", self.description())
- }
-}
-
-#[cfg(feature = "std")]
-impl ::std::error::Error for TimerError {
- fn description(&self) -> &str {
- self.description()
- }
-}
-
-impl From<TimerError> for Error {
- fn from(err: TimerError) -> Error {
- // Timer check is already quite permissive of failures so we don't
- // expect false-positive failures, i.e. any error is irrecoverable.
- #[cfg(feature = "std")] {
- Error::new(err)
- }
- #[cfg(not(feature = "std"))] {
- Error::from(core::num::NonZeroU32::new(err as u32).unwrap())
- }
- }
-}
-