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-rw-r--r--rand/rand_xoshiro/src/xoroshiro64star.rs13
1 files changed, 9 insertions, 4 deletions
diff --git a/rand/rand_xoshiro/src/xoroshiro64star.rs b/rand/rand_xoshiro/src/xoroshiro64star.rs
index 86338fd..6bb708a 100644
--- a/rand/rand_xoshiro/src/xoroshiro64star.rs
+++ b/rand/rand_xoshiro/src/xoroshiro64star.rs
@@ -6,7 +6,7 @@
// option. This file may not be copied, modified, or distributed
// except according to those terms.
-use byteorder::{ByteOrder, LittleEndian};
+#[cfg(feature="serde1")] use serde::{Serialize, Deserialize};
use rand_core;
use rand_core::le::read_u32_into;
use rand_core::impls::{fill_bytes_via_next, next_u64_via_u32};
@@ -23,6 +23,7 @@ use rand_core::{RngCore, SeedableRng};
/// David Blackman and Sebastiano Vigna.
#[allow(missing_copy_implementations)]
#[derive(Debug, Clone)]
+#[cfg_attr(feature="serde1", derive(Serialize, Deserialize))]
pub struct Xoroshiro64Star {
s0: u32,
s1: u32,
@@ -71,9 +72,7 @@ impl SeedableRng for Xoroshiro64Star {
/// Seed a `Xoroshiro64Star` from a `u64` using `SplitMix64`.
fn seed_from_u64(seed: u64) -> Xoroshiro64Star {
- let mut s = [0; 8];
- LittleEndian::write_u64(&mut s, seed);
- Xoroshiro64Star::from_seed(s)
+ from_splitmix!(seed)
}
}
@@ -94,4 +93,10 @@ mod tests {
assert_eq!(rng.next_u32(), e);
}
}
+
+ #[test]
+ fn zero_seed() {
+ let mut rng = Xoroshiro64Star::seed_from_u64(0);
+ assert_ne!(rng.next_u64(), 0);
+ }
}