Merge pull request #4 from rust-random/make_seed

Add Seeder::make_seed

CHANGELOG.md

@@ -4,6 +4,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.2.1] - 2020-05-22
+Add `Seeder::make_seed`.
+
 ## [0.2.0] - 2019-11-04
 Documentation reviewed and improved.
 

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rand_seeder"
-version = "0.2.0" # NB: When modifying, also modify html_root_url in lib.rs
+version = "0.2.1" # NB: When modifying, also modify html_root_url in lib.rs
 authors = ["The Rand Project Developers"]
 license = "MIT OR Apache-2.0"
 readme = "README.md"

src/lib.rs

@@ -34,7 +34,7 @@
 
 #![doc(html_logo_url = "https://www.rust-lang.org/logos/rust-logo-128x128-blk.png",
        html_favicon_url = "https://www.rust-lang.org/favicon.ico",
-       html_root_url = "https://docs.rs/rand_seeder/0.2.0")]
+       html_root_url = "https://docs.rs/rand_seeder/0.2.1")]
 
 #![deny(missing_docs)]
 #![deny(missing_debug_implementations)]
@@ -89,10 +89,20 @@ impl Seeder {
     ///
     /// Alternatively, one can obtain a [`SipRng`] via
     /// `SipHasher::from(h).into_rng()`.
+    #[inline]
     pub fn make_rng<R: SeedableRng>(&mut self) -> R {
-        let mut seed = R::Seed::default();
+        R::from_seed(self.make_seed())
+    }
+
+    /// Make a seed
+    ///
+    /// This mutates the state internally, thus can be called multiple times to
+    /// generate multiple independent seeds.
+    #[inline]
+    pub fn make_seed<S: AsMut<[u8]> + Default>(&mut self) -> S {
+        let mut seed = S::default();
         self.rng.fill_bytes(seed.as_mut());
-        R::from_seed(seed)
+        seed
     }
 }