54 lines
1.7 KiB
Rust
54 lines
1.7 KiB
Rust
#![cfg_attr(not(check_cfg), allow(unexpected_cfgs))]
|
|
|
|
use std::str;
|
|
use std::sync::atomic::{AtomicU32, Ordering};
|
|
use std::sync::Arc;
|
|
use std::thread;
|
|
|
|
#[test]
|
|
#[cfg_attr(not(exhaustive), ignore = "requires cfg(exhaustive)")]
|
|
fn test_exhaustive() {
|
|
const BATCH_SIZE: u32 = 1_000_000;
|
|
let counter = Arc::new(AtomicU32::new(0));
|
|
let finished = Arc::new(AtomicU32::new(0));
|
|
|
|
let mut workers = Vec::new();
|
|
for _ in 0..num_cpus::get() {
|
|
let counter = counter.clone();
|
|
let finished = finished.clone();
|
|
workers.push(thread::spawn(move || loop {
|
|
let batch = counter.fetch_add(1, Ordering::Relaxed);
|
|
if batch > u32::MAX / BATCH_SIZE {
|
|
return;
|
|
}
|
|
|
|
let min = batch * BATCH_SIZE;
|
|
let max = if batch == u32::MAX / BATCH_SIZE {
|
|
u32::MAX
|
|
} else {
|
|
min + BATCH_SIZE - 1
|
|
};
|
|
|
|
let mut bytes = [0u8; 24];
|
|
let mut buffer = ryu::Buffer::new();
|
|
for u in min..=max {
|
|
let f = f32::from_bits(u);
|
|
if !f.is_finite() {
|
|
continue;
|
|
}
|
|
let n = unsafe { ryu::raw::format32(f, bytes.as_mut_ptr()) };
|
|
assert_eq!(Ok(Ok(f)), str::from_utf8(&bytes[..n]).map(str::parse));
|
|
assert_eq!(Ok(f), buffer.format_finite(f).parse());
|
|
}
|
|
|
|
let increment = max - min + 1;
|
|
let update = finished.fetch_add(increment, Ordering::Relaxed);
|
|
println!("{}", u64::from(update) + u64::from(increment));
|
|
}));
|
|
}
|
|
|
|
for w in workers {
|
|
w.join().unwrap();
|
|
}
|
|
}
|