Merge tag 'debian/1.52.1+dfsg1-1_exp2' into proxmox/buster

[rustc.git] / vendor / rand / src / rngs / adapter / read.rs

diff --git a/vendor/rand/src/rngs/adapter/read.rs b/vendor/rand/src/rngs/adapter/read.rs
deleted file mode 100644 (file)
index 9a4b55d..0000000
--- a/vendor/rand/src/rngs/adapter/read.rs
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2018 Developers of the Rand project.
-// Copyright 2013 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.
-
-//! A wrapper around any Read to treat it as an RNG.
-
-use std::fmt;
-use std::io::Read;
-
-use rand_core::{impls, Error, RngCore};
-
-
-/// An RNG that reads random bytes straight from any type supporting
-/// [`std::io::Read`], for example files.
-///
-/// This will work best with an infinite reader, but that is not required.
-///
-/// This can be used with `/dev/urandom` on Unix but it is recommended to use
-/// [`OsRng`] instead.
-///
-/// # Panics
-///
-/// `ReadRng` uses [`std::io::Read::read_exact`], which retries on interrupts.
-/// All other errors from the underlying reader, including when it does not
-/// have enough data, will only be reported through [`try_fill_bytes`].
-/// The other [`RngCore`] methods will panic in case of an error.
-///
-/// # Example
-///
-/// ```
-/// use rand::Rng;
-/// use rand::rngs::adapter::ReadRng;
-///
-/// let data = vec![1, 2, 3, 4, 5, 6, 7, 8];
-/// let mut rng = ReadRng::new(&data[..]);
-/// println!("{:x}", rng.gen::<u32>());
-/// ```
-///
-/// [`OsRng`]: crate::rngs::OsRng
-/// [`try_fill_bytes`]: RngCore::try_fill_bytes
-#[derive(Debug)]
-pub struct ReadRng<R> {
-    reader: R,
-}
-
-impl<R: Read> ReadRng<R> {
-    /// Create a new `ReadRng` from a `Read`.
-    pub fn new(r: R) -> ReadRng<R> {
-        ReadRng { reader: r }
-    }
-}
-
-impl<R: Read> RngCore for ReadRng<R> {
-    fn next_u32(&mut self) -> u32 {
-        impls::next_u32_via_fill(self)
-    }
-
-    fn next_u64(&mut self) -> u64 {
-        impls::next_u64_via_fill(self)
-    }
-
-    fn fill_bytes(&mut self, dest: &mut [u8]) {
-        self.try_fill_bytes(dest).unwrap_or_else(|err| {
-            panic!(
-                "reading random bytes from Read implementation failed; error: {}",
-                err
-            )
-        });
-    }
-
-    fn try_fill_bytes(&mut self, dest: &mut [u8]) -> Result<(), Error> {
-        if dest.is_empty() {
-            return Ok(());
-        }
-        // Use `std::io::read_exact`, which retries on `ErrorKind::Interrupted`.
-        self.reader
-            .read_exact(dest)
-            .map_err(|e| Error::new(ReadError(e)))
-    }
-}
-
-/// `ReadRng` error type
-#[derive(Debug)]
-pub struct ReadError(std::io::Error);
-
-impl fmt::Display for ReadError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        write!(f, "ReadError: {}", self.0)
-    }
-}
-
-impl std::error::Error for ReadError {
-    fn source(&self) -> Option<&(dyn std::error::Error + 'static)> {
-        Some(&self.0)
-    }
-}
-
-
-#[cfg(test)]
-mod test {
-    use super::ReadRng;
-    use crate::RngCore;
-
-    #[test]
-    fn test_reader_rng_u64() {
-        // transmute from the target to avoid endianness concerns.
-        #[rustfmt::skip]
-        let v = vec![0u8, 0, 0, 0, 0, 0, 0, 1,
-                     0  , 0, 0, 0, 0, 0, 0, 2,
-                     0,   0, 0, 0, 0, 0, 0, 3];
-        let mut rng = ReadRng::new(&v[..]);
-
-        assert_eq!(rng.next_u64(), 1_u64.to_be());
-        assert_eq!(rng.next_u64(), 2_u64.to_be());
-        assert_eq!(rng.next_u64(), 3_u64.to_be());
-    }
-
-    #[test]
-    fn test_reader_rng_u32() {
-        let v = vec![0u8, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3];
-        let mut rng = ReadRng::new(&v[..]);
-
-        assert_eq!(rng.next_u32(), 1_u32.to_be());
-        assert_eq!(rng.next_u32(), 2_u32.to_be());
-        assert_eq!(rng.next_u32(), 3_u32.to_be());
-    }
-
-    #[test]
-    fn test_reader_rng_fill_bytes() {
-        let v = [1u8, 2, 3, 4, 5, 6, 7, 8];
-        let mut w = [0u8; 8];
-
-        let mut rng = ReadRng::new(&v[..]);
-        rng.fill_bytes(&mut w);
-
-        assert!(v == w);
-    }
-
-    #[test]
-    fn test_reader_rng_insufficient_bytes() {
-        let v = [1u8, 2, 3, 4, 5, 6, 7, 8];
-        let mut w = [0u8; 9];
-
-        let mut rng = ReadRng::new(&v[..]);
-
-        let result = rng.try_fill_bytes(&mut w);
-        assert!(result.is_err());
-        println!("Error: {}", result.unwrap_err());
-    }
-}