From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- third_party/rust/dtoa/src/lib.rs | 205 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 third_party/rust/dtoa/src/lib.rs (limited to 'third_party/rust/dtoa/src/lib.rs') diff --git a/third_party/rust/dtoa/src/lib.rs b/third_party/rust/dtoa/src/lib.rs new file mode 100644 index 0000000000..aed62f500b --- /dev/null +++ b/third_party/rust/dtoa/src/lib.rs @@ -0,0 +1,205 @@ +//! [![github]](https://github.com/dtolnay/dtoa) [![crates-io]](https://crates.io/crates/dtoa) [![docs-rs]](https://docs.rs/dtoa) +//! +//! [github]: https://img.shields.io/badge/github-8da0cb?style=for-the-badge&labelColor=555555&logo=github +//! [crates-io]: https://img.shields.io/badge/crates.io-fc8d62?style=for-the-badge&labelColor=555555&logo=rust +//! [docs-rs]: https://img.shields.io/badge/docs.rs-66c2a5?style=for-the-badge&labelColor=555555&logoColor=white&logo=data:image/svg+xml;base64,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 +//! +//!
+//! +//! This crate provides fast functions for printing floating-point primitives to +//! an [`io::Write`]. The implementation is a straightforward Rust port of [Milo +//! Yip]'s C++ implementation [dtoa.h]. The original C++ code of each function +//! is included in comments. +//! +//! See also [`itoa`] for printing integer primitives. +//! +//! [`io::Write`]: https://doc.rust-lang.org/std/io/trait.Write.html +//! [Milo Yip]: https://github.com/miloyip +//! [dtoa.h]: https://github.com/miloyip/rapidjson/blob/master/include/rapidjson/internal/dtoa.h +//! [`itoa`]: https://github.com/dtolnay/itoa +//! +//!
+//! +//! ## Performance (lower is better) +//! +//! ![performance](https://raw.githubusercontent.com/dtolnay/dtoa/master/performance.png) +//! +//!
+//! +//! # Examples +//! +//! ```edition2018 +//! use std::io; +//! +//! fn main() -> io::Result<()> { +//! // Write to a vector or other io::Write. +//! let mut buf = Vec::new(); +//! dtoa::write(&mut buf, 2.71828f64)?; +//! println!("{:?}", buf); +//! +//! // Write to a stack buffer. +//! let mut bytes = [b'\0'; 20]; +//! let n = dtoa::write(&mut bytes[..], 2.71828f64)?; +//! println!("{:?}", &bytes[..n]); +//! +//! Ok(()) +//! } +//! ``` + +#![doc(html_root_url = "https://docs.rs/dtoa/0.4.8")] +#![cfg_attr(feature = "cargo-clippy", allow(renamed_and_removed_lints))] +#![cfg_attr( + feature = "cargo-clippy", + allow( + cast_lossless, + cast_possible_truncation, + if_not_else, + missing_errors_doc, + range_plus_one, + shadow_unrelated, + transmute_float_to_int, + unreadable_literal, + unseparated_literal_suffix + ) +)] + +#[macro_use] mod diyfp; +#[macro_use] mod dtoa; + +use std::{io, mem, ops, ptr, slice}; + +/// Write float to an `io::Write`. +#[inline] +pub fn write(wr: W, value: V) -> io::Result { + value.write(wr) +} + +/// An floating point number that can be formatted by `dtoa::write`. +pub trait Floating { + fn write(self, wr: W) -> io::Result; +} + +impl Floating for f32 { + fn write(self, wr: W) -> io::Result { + dtoa! { + floating_type: f32, + significand_type: u32, + exponent_type: i32, + + diy_significand_size: 32, + significand_size: 23, + exponent_bias: 0x7F, + mask_type: u32, + exponent_mask: 0x7F800000, + significand_mask: 0x007FFFFF, + hidden_bit: 0x00800000, + cached_powers_f: CACHED_POWERS_F_32, + cached_powers_e: CACHED_POWERS_E_32, + min_power: (-36), + }; + unsafe { dtoa(wr, self) } + } +} + +impl Floating for f64 { + fn write(self, wr: W) -> io::Result { + dtoa! { + floating_type: f64, + significand_type: u64, + exponent_type: isize, + + diy_significand_size: 64, + significand_size: 52, + exponent_bias: 0x3FF, + mask_type: u64, + exponent_mask: 0x7FF0000000000000, + significand_mask: 0x000FFFFFFFFFFFFF, + hidden_bit: 0x0010000000000000, + cached_powers_f: CACHED_POWERS_F_64, + cached_powers_e: CACHED_POWERS_E_64, + min_power: (-348), + }; + unsafe { dtoa(wr, self) } + } +} + +//////////////////////////////////////////////////////////////////////////////// + +const MAX_DECIMAL_PLACES: isize = 324; + +static DEC_DIGITS_LUT: [u8; 200] = *b"\ + 0001020304050607080910111213141516171819\ + 2021222324252627282930313233343536373839\ + 4041424344454647484950515253545556575859\ + 6061626364656667686970717273747576777879\ + 8081828384858687888990919293949596979899"; + +// 10^-36, 10^-28, ..., 10^52 +static CACHED_POWERS_F_32: [u32; 12] = [ + 0xaa242499, 0xfd87b5f3, 0xbce50865, 0x8cbccc09, + 0xd1b71759, 0x9c400000, 0xe8d4a510, 0xad78ebc6, + 0x813f3979, 0xc097ce7c, 0x8f7e32ce, 0xd5d238a5, +]; + +static CACHED_POWERS_E_32: [i16; 12] = [ + -151, -125, -98, -71, -45, -18, 8, 35, 62, 88, 115, 141, +]; + +// 10^-348, 10^-340, ..., 10^340 +static CACHED_POWERS_F_64: [u64; 87] = [ + 0xfa8fd5a0081c0288, 0xbaaee17fa23ebf76, + 0x8b16fb203055ac76, 0xcf42894a5dce35ea, + 0x9a6bb0aa55653b2d, 0xe61acf033d1a45df, + 0xab70fe17c79ac6ca, 0xff77b1fcbebcdc4f, + 0xbe5691ef416bd60c, 0x8dd01fad907ffc3c, + 0xd3515c2831559a83, 0x9d71ac8fada6c9b5, + 0xea9c227723ee8bcb, 0xaecc49914078536d, + 0x823c12795db6ce57, 0xc21094364dfb5637, + 0x9096ea6f3848984f, 0xd77485cb25823ac7, + 0xa086cfcd97bf97f4, 0xef340a98172aace5, + 0xb23867fb2a35b28e, 0x84c8d4dfd2c63f3b, + 0xc5dd44271ad3cdba, 0x936b9fcebb25c996, + 0xdbac6c247d62a584, 0xa3ab66580d5fdaf6, + 0xf3e2f893dec3f126, 0xb5b5ada8aaff80b8, + 0x87625f056c7c4a8b, 0xc9bcff6034c13053, + 0x964e858c91ba2655, 0xdff9772470297ebd, + 0xa6dfbd9fb8e5b88f, 0xf8a95fcf88747d94, + 0xb94470938fa89bcf, 0x8a08f0f8bf0f156b, + 0xcdb02555653131b6, 0x993fe2c6d07b7fac, + 0xe45c10c42a2b3b06, 0xaa242499697392d3, + 0xfd87b5f28300ca0e, 0xbce5086492111aeb, + 0x8cbccc096f5088cc, 0xd1b71758e219652c, + 0x9c40000000000000, 0xe8d4a51000000000, + 0xad78ebc5ac620000, 0x813f3978f8940984, + 0xc097ce7bc90715b3, 0x8f7e32ce7bea5c70, + 0xd5d238a4abe98068, 0x9f4f2726179a2245, + 0xed63a231d4c4fb27, 0xb0de65388cc8ada8, + 0x83c7088e1aab65db, 0xc45d1df942711d9a, + 0x924d692ca61be758, 0xda01ee641a708dea, + 0xa26da3999aef774a, 0xf209787bb47d6b85, + 0xb454e4a179dd1877, 0x865b86925b9bc5c2, + 0xc83553c5c8965d3d, 0x952ab45cfa97a0b3, + 0xde469fbd99a05fe3, 0xa59bc234db398c25, + 0xf6c69a72a3989f5c, 0xb7dcbf5354e9bece, + 0x88fcf317f22241e2, 0xcc20ce9bd35c78a5, + 0x98165af37b2153df, 0xe2a0b5dc971f303a, + 0xa8d9d1535ce3b396, 0xfb9b7cd9a4a7443c, + 0xbb764c4ca7a44410, 0x8bab8eefb6409c1a, + 0xd01fef10a657842c, 0x9b10a4e5e9913129, + 0xe7109bfba19c0c9d, 0xac2820d9623bf429, + 0x80444b5e7aa7cf85, 0xbf21e44003acdd2d, + 0x8e679c2f5e44ff8f, 0xd433179d9c8cb841, + 0x9e19db92b4e31ba9, 0xeb96bf6ebadf77d9, + 0xaf87023b9bf0ee6b, +]; +static CACHED_POWERS_E_64: [i16; 87] = [ + -1220, -1193, -1166, -1140, -1113, -1087, -1060, -1034, -1007, -980, + -954, -927, -901, -874, -847, -821, -794, -768, -741, -715, + -688, -661, -635, -608, -582, -555, -529, -502, -475, -449, + -422, -396, -369, -343, -316, -289, -263, -236, -210, -183, + -157, -130, -103, -77, -50, -24, 3, 30, 56, 83, + 109, 136, 162, 189, 216, 242, 269, 295, 322, 348, + 375, 402, 428, 455, 481, 508, 534, 561, 588, 614, + 641, 667, 694, 720, 747, 774, 800, 827, 853, 880, + 907, 933, 960, 986, 1013, 1039, 1066, +]; -- cgit v1.2.3