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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/fastrand/src/global_rng.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/fastrand/src/global_rng.rs')
-rw-r--r--vendor/fastrand/src/global_rng.rs218
1 files changed, 0 insertions, 218 deletions
diff --git a/vendor/fastrand/src/global_rng.rs b/vendor/fastrand/src/global_rng.rs
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index f994902..0000000
--- a/vendor/fastrand/src/global_rng.rs
+++ /dev/null
@@ -1,218 +0,0 @@
-//! A global, thread-local random number generator.
-
-use crate::Rng;
-
-use std::cell::Cell;
-use std::ops::RangeBounds;
-
-// Chosen by fair roll of the dice.
-const DEFAULT_RNG_SEED: u64 = 0xef6f79ed30ba75a;
-
-impl Default for Rng {
- /// Initialize the `Rng` from the system's random number generator.
- ///
- /// This is equivalent to [`Rng::new()`].
- #[inline]
- fn default() -> Rng {
- Rng::new()
- }
-}
-
-impl Rng {
- /// Creates a new random number generator.
- #[inline]
- pub fn new() -> Rng {
- try_with_rng(Rng::fork).unwrap_or_else(|_| Rng::with_seed(0x4d595df4d0f33173))
- }
-}
-
-thread_local! {
- static RNG: Cell<Rng> = Cell::new(Rng(random_seed().unwrap_or(DEFAULT_RNG_SEED)));
-}
-
-/// Run an operation with the current thread-local generator.
-#[inline]
-fn with_rng<R>(f: impl FnOnce(&mut Rng) -> R) -> R {
- RNG.with(|rng| {
- let current = rng.replace(Rng(0));
-
- let mut restore = RestoreOnDrop { rng, current };
-
- f(&mut restore.current)
- })
-}
-
-/// Try to run an operation with the current thread-local generator.
-#[inline]
-fn try_with_rng<R>(f: impl FnOnce(&mut Rng) -> R) -> Result<R, std::thread::AccessError> {
- RNG.try_with(|rng| {
- let current = rng.replace(Rng(0));
-
- let mut restore = RestoreOnDrop { rng, current };
-
- f(&mut restore.current)
- })
-}
-
-/// Make sure the original RNG is restored even on panic.
-struct RestoreOnDrop<'a> {
- rng: &'a Cell<Rng>,
- current: Rng,
-}
-
-impl Drop for RestoreOnDrop<'_> {
- fn drop(&mut self) {
- self.rng.set(Rng(self.current.0));
- }
-}
-
-/// Initializes the thread-local generator with the given seed.
-#[inline]
-pub fn seed(seed: u64) {
- with_rng(|r| r.seed(seed));
-}
-
-/// Gives back **current** seed that is being held by the thread-local generator.
-#[inline]
-pub fn get_seed() -> u64 {
- with_rng(|r| r.get_seed())
-}
-
-/// Generates a random `bool`.
-#[inline]
-pub fn bool() -> bool {
- with_rng(|r| r.bool())
-}
-
-/// Generates a random `char` in ranges a-z and A-Z.
-#[inline]
-pub fn alphabetic() -> char {
- with_rng(|r| r.alphabetic())
-}
-
-/// Generates a random `char` in ranges a-z, A-Z and 0-9.
-#[inline]
-pub fn alphanumeric() -> char {
- with_rng(|r| r.alphanumeric())
-}
-
-/// Generates a random `char` in range a-z.
-#[inline]
-pub fn lowercase() -> char {
- with_rng(|r| r.lowercase())
-}
-
-/// Generates a random `char` in range A-Z.
-#[inline]
-pub fn uppercase() -> char {
- with_rng(|r| r.uppercase())
-}
-
-/// Choose an item from an iterator at random.
-///
-/// This function may have an unexpected result if the `len()` property of the
-/// iterator does not match the actual number of items in the iterator. If
-/// the iterator is empty, this returns `None`.
-#[inline]
-pub fn choice<I>(iter: I) -> Option<I::Item>
-where
- I: IntoIterator,
- I::IntoIter: ExactSizeIterator,
-{
- with_rng(|r| r.choice(iter))
-}
-
-/// Generates a random digit in the given `base`.
-///
-/// Digits are represented by `char`s in ranges 0-9 and a-z.
-///
-/// Panics if the base is zero or greater than 36.
-#[inline]
-pub fn digit(base: u32) -> char {
- with_rng(|r| r.digit(base))
-}
-
-/// Shuffles a slice randomly.
-#[inline]
-pub fn shuffle<T>(slice: &mut [T]) {
- with_rng(|r| r.shuffle(slice))
-}
-
-macro_rules! integer {
- ($t:tt, $doc:tt) => {
- #[doc = $doc]
- ///
- /// Panics if the range is empty.
- #[inline]
- pub fn $t(range: impl RangeBounds<$t>) -> $t {
- with_rng(|r| r.$t(range))
- }
- };
-}
-
-integer!(u8, "Generates a random `u8` in the given range.");
-integer!(i8, "Generates a random `i8` in the given range.");
-integer!(u16, "Generates a random `u16` in the given range.");
-integer!(i16, "Generates a random `i16` in the given range.");
-integer!(u32, "Generates a random `u32` in the given range.");
-integer!(i32, "Generates a random `i32` in the given range.");
-integer!(u64, "Generates a random `u64` in the given range.");
-integer!(i64, "Generates a random `i64` in the given range.");
-integer!(u128, "Generates a random `u128` in the given range.");
-integer!(i128, "Generates a random `i128` in the given range.");
-integer!(usize, "Generates a random `usize` in the given range.");
-integer!(isize, "Generates a random `isize` in the given range.");
-integer!(char, "Generates a random `char` in the given range.");
-
-/// Generates a random `f32` in range `0..1`.
-pub fn f32() -> f32 {
- with_rng(|r| r.f32())
-}
-
-/// Generates a random `f64` in range `0..1`.
-pub fn f64() -> f64 {
- with_rng(|r| r.f64())
-}
-
-/// Collects `amount` values at random from the iterator into a vector.
-pub fn choose_multiple<T: Iterator>(source: T, amount: usize) -> Vec<T::Item> {
- with_rng(|rng| rng.choose_multiple(source, amount))
-}
-
-#[cfg(not(all(
- any(target_arch = "wasm32", target_arch = "wasm64"),
- target_os = "unknown"
-)))]
-fn random_seed() -> Option<u64> {
- use std::collections::hash_map::DefaultHasher;
- use std::hash::{Hash, Hasher};
- use std::thread;
- use std::time::Instant;
-
- let mut hasher = DefaultHasher::new();
- Instant::now().hash(&mut hasher);
- thread::current().id().hash(&mut hasher);
- let hash = hasher.finish();
- Some((hash << 1) | 1)
-}
-
-#[cfg(all(
- any(target_arch = "wasm32", target_arch = "wasm64"),
- target_os = "unknown",
- feature = "js"
-))]
-fn random_seed() -> Option<u64> {
- // TODO(notgull): Failures should be logged somewhere.
- let mut seed = [0u8; 8];
- getrandom::getrandom(&mut seed).ok()?;
- Some(u64::from_ne_bytes(seed))
-}
-
-#[cfg(all(
- any(target_arch = "wasm32", target_arch = "wasm64"),
- target_os = "unknown",
- not(feature = "js")
-))]
-fn random_seed() -> Option<u64> {
- None
-}