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Diffstat (limited to 'rand/rand_jitter/src/error.rs')
-rw-r--r-- | rand/rand_jitter/src/error.rs | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/rand/rand_jitter/src/error.rs b/rand/rand_jitter/src/error.rs deleted file mode 100644 index b54fffa..0000000 --- a/rand/rand_jitter/src/error.rs +++ /dev/null @@ -1,77 +0,0 @@ -// 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()) - } - } -} - |