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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /vendor/ryu/tests/exhaustive.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/ryu/tests/exhaustive.rs')
-rw-r--r-- | vendor/ryu/tests/exhaustive.rs | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/vendor/ryu/tests/exhaustive.rs b/vendor/ryu/tests/exhaustive.rs new file mode 100644 index 000000000..569bcff92 --- /dev/null +++ b/vendor/ryu/tests/exhaustive.rs @@ -0,0 +1,52 @@ +#![cfg(exhaustive)] + +use std::str; +use std::sync::atomic::{AtomicUsize, Ordering}; +use std::sync::Arc; +use std::thread; + +#[test] +fn test_exhaustive() { + const BATCH_SIZE: u32 = 1_000_000; + let counter = Arc::new(AtomicUsize::new(0)); + let finished = Arc::new(AtomicUsize::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) as u32; + if batch > u32::max_value() / BATCH_SIZE { + return; + } + + let min = batch * BATCH_SIZE; + let max = if batch == u32::max_value() / BATCH_SIZE { + u32::max_value() + } 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, &mut bytes[0]) }; + 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) as usize; + let update = finished.fetch_add(increment, Ordering::Relaxed); + println!("{}", update + increment); + })); + } + + for w in workers { + w.join().unwrap(); + } +} |