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fix some rng bugs

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Alula 2021-01-16 14:51:12 +01:00
parent 9f70bf6fd0
commit 2563c09b69
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1 changed files with 2 additions and 2 deletions
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4
src/rng.rs
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@ -5,7 +5,7 @@ pub trait RNG {
fn next(&self) -> i32; fn next(&self) -> i32;
fn range(&self, range: Range<i32>) -> i32 { fn range(&self, range: Range<i32>) -> i32 {
range.start.saturating_add((self.next() >> 2) % range.len() as i32) range.start + ((self.next() & 0x7fffffff) % (range.len() as i32))
} }
} }
@ -100,6 +100,6 @@ impl Xoroshiro32PlusPlus {
impl RNG for Xoroshiro32PlusPlus { impl RNG for Xoroshiro32PlusPlus {
fn next(&self) -> i32 { fn next(&self) -> i32 {
(((self.next_u16() as u32) << 16 | self.next_u16() as u32) >> 2) as i32 ((self.next_u16() as u32) << 16 | self.next_u16() as u32) as i32
} }
} }