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Fixed algorithm to match shootout requirements #27636

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Merged
merged 1 commit into from
Aug 12, 2015
Merged

Fixed algorithm to match shootout requirements #27636

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29 changes: 13 additions & 16 deletions src/test/bench/shootout-fasta-redux.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -87,16 +87,12 @@ static HOMO_SAPIENS: [AminoAcid;4] = [
AminoAcid { c: 't' as u8, p: 0.3015094502008 },
];

// FIXME: Use map().
fn sum_and_scale(a: &'static [AminoAcid]) -> Vec<AminoAcid> {
let mut result = Vec::new();
let mut p = 0f32;
for a_i in a {
let mut a_i = *a_i;
p += a_i.p;
a_i.p = p * LOOKUP_SCALE;
result.push(a_i);
}
let mut result: Vec<AminoAcid> = a.iter().map(|a_i| {
p += a_i.p;
AminoAcid { c: a_i.c, p: p * LOOKUP_SCALE }
}).collect();
let result_len = result.len();
result[result_len - 1].p = LOOKUP_SCALE;
result
Expand Down Expand Up @@ -177,17 +173,17 @@ impl<'a, W: Write> RandomFasta<'a, W> {

fn rng(&mut self, max: f32) -> f32 {
self.seed = (self.seed * IA + IC) % IM;
max * (self.seed as f32) / (IM as f32)
(max * self.seed as f32) / (IM as f32)
}

fn nextc(&mut self) -> u8 {
let r = self.rng(1.0);
for a in &self.lookup[..] {
if a.p >= r {
return a.c;
let r = self.rng(LOOKUP_SCALE);
for i in (r as usize..LOOKUP_SIZE) {
if self.lookup[i].p >= r {
return self.lookup[i].c;
}
}
0
unreachable!();
}

fn make(&mut self, n: usize) -> io::Result<()> {
Expand Down Expand Up @@ -216,8 +212,9 @@ fn main() {
} else {
5
};

let mut out = io::stdout();

let stdout = io::stdout();
let mut out = stdout.lock();

out.write_all(b">ONE Homo sapiens alu\n").unwrap();
{
Expand Down