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authorValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
committerValentin Popov <valentin@popov.link>2024-07-19 15:37:58 +0300
commita990de90fe41456a23e58bd087d2f107d321f3a1 (patch)
tree15afc392522a9e85dc3332235e311b7d39352ea9 /vendor/ryu/src/buffer/mod.rs
parent3d48cd3f81164bbfc1a755dc1d4a9a02f98c8ddd (diff)
downloadfparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.tar.xz
fparkan-a990de90fe41456a23e58bd087d2f107d321f3a1.zip
Deleted vendor folder
Diffstat (limited to 'vendor/ryu/src/buffer/mod.rs')
-rw-r--r--vendor/ryu/src/buffer/mod.rs171
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diff --git a/vendor/ryu/src/buffer/mod.rs b/vendor/ryu/src/buffer/mod.rs
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@@ -1,171 +0,0 @@
-use crate::raw;
-use core::mem::MaybeUninit;
-use core::{slice, str};
-#[cfg(feature = "no-panic")]
-use no_panic::no_panic;
-
-const NAN: &str = "NaN";
-const INFINITY: &str = "inf";
-const NEG_INFINITY: &str = "-inf";
-
-/// Safe API for formatting floating point numbers to text.
-///
-/// ## Example
-///
-/// ```
-/// let mut buffer = ryu::Buffer::new();
-/// let printed = buffer.format_finite(1.234);
-/// assert_eq!(printed, "1.234");
-/// ```
-pub struct Buffer {
- bytes: [MaybeUninit<u8>; 24],
-}
-
-impl Buffer {
- /// This is a cheap operation; you don't need to worry about reusing buffers
- /// for efficiency.
- #[inline]
- #[cfg_attr(feature = "no-panic", no_panic)]
- pub fn new() -> Self {
- let bytes = [MaybeUninit::<u8>::uninit(); 24];
- Buffer { bytes }
- }
-
- /// Print a floating point number into this buffer and return a reference to
- /// its string representation within the buffer.
- ///
- /// # Special cases
- ///
- /// This function formats NaN as the string "NaN", positive infinity as
- /// "inf", and negative infinity as "-inf" to match std::fmt.
- ///
- /// If your input is known to be finite, you may get better performance by
- /// calling the `format_finite` method instead of `format` to avoid the
- /// checks for special cases.
- #[cfg_attr(feature = "no-panic", inline)]
- #[cfg_attr(feature = "no-panic", no_panic)]
- pub fn format<F: Float>(&mut self, f: F) -> &str {
- if f.is_nonfinite() {
- f.format_nonfinite()
- } else {
- self.format_finite(f)
- }
- }
-
- /// Print a floating point number into this buffer and return a reference to
- /// its string representation within the buffer.
- ///
- /// # Special cases
- ///
- /// This function **does not** check for NaN or infinity. If the input
- /// number is not a finite float, the printed representation will be some
- /// correctly formatted but unspecified numerical value.
- ///
- /// Please check [`is_finite`] yourself before calling this function, or
- /// check [`is_nan`] and [`is_infinite`] and handle those cases yourself.
- ///
- /// [`is_finite`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_finite
- /// [`is_nan`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_nan
- /// [`is_infinite`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_infinite
- #[inline]
- #[cfg_attr(feature = "no-panic", no_panic)]
- pub fn format_finite<F: Float>(&mut self, f: F) -> &str {
- unsafe {
- let n = f.write_to_ryu_buffer(self.bytes.as_mut_ptr() as *mut u8);
- debug_assert!(n <= self.bytes.len());
- let slice = slice::from_raw_parts(self.bytes.as_ptr() as *const u8, n);
- str::from_utf8_unchecked(slice)
- }
- }
-}
-
-impl Copy for Buffer {}
-
-impl Clone for Buffer {
- #[inline]
- #[allow(clippy::non_canonical_clone_impl)] // false positive https://github.com/rust-lang/rust-clippy/issues/11072
- fn clone(&self) -> Self {
- Buffer::new()
- }
-}
-
-impl Default for Buffer {
- #[inline]
- #[cfg_attr(feature = "no-panic", no_panic)]
- fn default() -> Self {
- Buffer::new()
- }
-}
-
-/// A floating point number, f32 or f64, that can be written into a
-/// [`ryu::Buffer`][Buffer].
-///
-/// This trait is sealed and cannot be implemented for types outside of the
-/// `ryu` crate.
-pub trait Float: Sealed {}
-impl Float for f32 {}
-impl Float for f64 {}
-
-pub trait Sealed: Copy {
- fn is_nonfinite(self) -> bool;
- fn format_nonfinite(self) -> &'static str;
- unsafe fn write_to_ryu_buffer(self, result: *mut u8) -> usize;
-}
-
-impl Sealed for f32 {
- #[inline]
- fn is_nonfinite(self) -> bool {
- const EXP_MASK: u32 = 0x7f800000;
- let bits = self.to_bits();
- bits & EXP_MASK == EXP_MASK
- }
-
- #[cold]
- #[cfg_attr(feature = "no-panic", inline)]
- fn format_nonfinite(self) -> &'static str {
- const MANTISSA_MASK: u32 = 0x007fffff;
- const SIGN_MASK: u32 = 0x80000000;
- let bits = self.to_bits();
- if bits & MANTISSA_MASK != 0 {
- NAN
- } else if bits & SIGN_MASK != 0 {
- NEG_INFINITY
- } else {
- INFINITY
- }
- }
-
- #[inline]
- unsafe fn write_to_ryu_buffer(self, result: *mut u8) -> usize {
- raw::format32(self, result)
- }
-}
-
-impl Sealed for f64 {
- #[inline]
- fn is_nonfinite(self) -> bool {
- const EXP_MASK: u64 = 0x7ff0000000000000;
- let bits = self.to_bits();
- bits & EXP_MASK == EXP_MASK
- }
-
- #[cold]
- #[cfg_attr(feature = "no-panic", inline)]
- fn format_nonfinite(self) -> &'static str {
- const MANTISSA_MASK: u64 = 0x000fffffffffffff;
- const SIGN_MASK: u64 = 0x8000000000000000;
- let bits = self.to_bits();
- if bits & MANTISSA_MASK != 0 {
- NAN
- } else if bits & SIGN_MASK != 0 {
- NEG_INFINITY
- } else {
- INFINITY
- }
- }
-
- #[inline]
- unsafe fn write_to_ryu_buffer(self, result: *mut u8) -> usize {
- raw::format64(self, result)
- }
-}