From 1b6a04ca5504955c571d1c97504fb45ea0befee4 Mon Sep 17 00:00:00 2001 From: Valentin Popov Date: Mon, 8 Jan 2024 01:21:28 +0400 Subject: Initial vendor packages Signed-off-by: Valentin Popov --- vendor/itoa/.cargo-checksum.json | 1 + vendor/itoa/Cargo.toml | 43 ++++++ vendor/itoa/LICENSE-APACHE | 176 +++++++++++++++++++++++ vendor/itoa/LICENSE-MIT | 23 +++ vendor/itoa/README.md | 59 ++++++++ vendor/itoa/benches/bench.rs | 55 ++++++++ vendor/itoa/src/lib.rs | 295 +++++++++++++++++++++++++++++++++++++++ vendor/itoa/src/udiv128.rs | 48 +++++++ vendor/itoa/tests/test.rs | 30 ++++ 9 files changed, 730 insertions(+) create mode 100644 vendor/itoa/.cargo-checksum.json create mode 100644 vendor/itoa/Cargo.toml create mode 100644 vendor/itoa/LICENSE-APACHE create mode 100644 vendor/itoa/LICENSE-MIT create mode 100644 vendor/itoa/README.md create mode 100644 vendor/itoa/benches/bench.rs create mode 100644 vendor/itoa/src/lib.rs create mode 100644 vendor/itoa/src/udiv128.rs create mode 100644 vendor/itoa/tests/test.rs (limited to 'vendor/itoa') diff --git a/vendor/itoa/.cargo-checksum.json b/vendor/itoa/.cargo-checksum.json new file mode 100644 index 0000000..efd76a8 --- /dev/null +++ b/vendor/itoa/.cargo-checksum.json @@ -0,0 +1 @@ +{"files":{"Cargo.toml":"fc26fe5442702edfa4cd1a9b0330aa51043d9f7b6a653decddabdf930543a424","LICENSE-APACHE":"62c7a1e35f56406896d7aa7ca52d0cc0d272ac022b5d2796e7d6905db8a3636a","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"48573443063fa4e0786c3b46f42b6efd1f171c6b73408a64afc1b34de89f31fe","benches/bench.rs":"636f3093bd461210ad3063289d455f90669c4a1be3273bcd30898de39f02c641","src/lib.rs":"c4c7f2e0bb9cb5090837629bfa8752e5b6cd537c98947e6ddd9467c81460ea51","src/udiv128.rs":"d28c1872c37ee2185931babcb20a221b8706a5aa8abc4963419763888023ff17","tests/test.rs":"aa1e910573a1d847d39773b4a2e4c597a8d3810070332673df0f6864cab24807"},"package":"b1a46d1a171d865aa5f83f92695765caa047a9b4cbae2cbf37dbd613a793fd4c"} \ No newline at end of file diff --git a/vendor/itoa/Cargo.toml b/vendor/itoa/Cargo.toml new file mode 100644 index 0000000..889aa5d --- /dev/null +++ b/vendor/itoa/Cargo.toml @@ -0,0 +1,43 @@ +# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO +# +# When uploading crates to the registry Cargo will automatically +# "normalize" Cargo.toml files for maximal compatibility +# with all versions of Cargo and also rewrite `path` dependencies +# to registry (e.g., crates.io) dependencies. +# +# If you are reading this file be aware that the original Cargo.toml +# will likely look very different (and much more reasonable). +# See Cargo.toml.orig for the original contents. + +[package] +edition = "2018" +rust-version = "1.36" +name = "itoa" +version = "1.0.10" +authors = ["David Tolnay "] +exclude = [ + "performance.png", + "chart/**", +] +description = "Fast integer primitive to string conversion" +documentation = "https://docs.rs/itoa" +readme = "README.md" +keywords = ["integer"] +categories = [ + "value-formatting", + "no-std", + "no-std::no-alloc", +] +license = "MIT OR Apache-2.0" +repository = "https://github.com/dtolnay/itoa" + +[package.metadata.docs.rs] +rustdoc-args = ["--generate-link-to-definition"] +targets = ["x86_64-unknown-linux-gnu"] + +[lib] +doc-scrape-examples = false + +[dependencies.no-panic] +version = "0.1" +optional = true diff --git a/vendor/itoa/LICENSE-APACHE b/vendor/itoa/LICENSE-APACHE new file mode 100644 index 0000000..1b5ec8b --- /dev/null +++ b/vendor/itoa/LICENSE-APACHE @@ -0,0 +1,176 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + +TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + +1. Definitions. + + "License" shall mean the terms and conditions for use, reproduction, + and distribution as defined by Sections 1 through 9 of this document. + + "Licensor" shall mean the copyright owner or entity authorized by + the copyright owner that is granting the License. + + "Legal Entity" shall mean the union of the acting entity and all + other entities that control, are controlled by, or are under common + control with that entity. For the purposes of this definition, + "control" means (i) the power, direct or indirect, to cause the + direction or management of such entity, whether by contract or + otherwise, or (ii) ownership of fifty percent (50%) or more of the + outstanding shares, or (iii) beneficial ownership of such entity. + + "You" (or "Your") shall mean an individual or Legal Entity + exercising permissions granted by this License. + + "Source" form shall mean the preferred form for making modifications, + including but not limited to software source code, documentation + source, and configuration files. + + "Object" form shall mean any form resulting from mechanical + transformation or translation of a Source form, including but + not limited to compiled object code, generated documentation, + and conversions to other media types. + + "Work" shall mean the work of authorship, whether in Source or + Object form, made available under the License, as indicated by a + copyright notice that is included in or attached to the work + (an example is provided in the Appendix below). + + "Derivative Works" shall mean any work, whether in Source or Object + form, that is based on (or derived from) the Work and for which the + editorial revisions, annotations, elaborations, or other modifications + represent, as a whole, an original work of authorship. For the purposes + of this License, Derivative Works shall not include works that remain + separable from, or merely link (or bind by name) to the interfaces of, + the Work and Derivative Works thereof. + + "Contribution" shall mean any work of authorship, including + the original version of the Work and any modifications or additions + to that Work or Derivative Works thereof, that is intentionally + submitted to Licensor for inclusion in the Work by the copyright owner + or by an individual or Legal Entity authorized to submit on behalf of + the copyright owner. For the purposes of this definition, "submitted" + means any form of electronic, verbal, or written communication sent + to the Licensor or its representatives, including but not limited to + communication on electronic mailing lists, source code control systems, + and issue tracking systems that are managed by, or on behalf of, the + Licensor for the purpose of discussing and improving the Work, but + excluding communication that is conspicuously marked or otherwise + designated in writing by the copyright owner as "Not a Contribution." + + "Contributor" shall mean Licensor and any individual or Legal Entity + on behalf of whom a Contribution has been received by Licensor and + subsequently incorporated within the Work. + +2. Grant of Copyright License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + copyright license to reproduce, prepare Derivative Works of, + publicly display, publicly perform, sublicense, and distribute the + Work and such Derivative Works in Source or Object form. + +3. Grant of Patent License. Subject to the terms and conditions of + this License, each Contributor hereby grants to You a perpetual, + worldwide, non-exclusive, no-charge, royalty-free, irrevocable + (except as stated in this section) patent license to make, have made, + use, offer to sell, sell, import, and otherwise transfer the Work, + where such license applies only to those patent claims licensable + by such Contributor that are necessarily infringed by their + Contribution(s) alone or by combination of their Contribution(s) + with the Work to which such Contribution(s) was submitted. If You + institute patent litigation against any entity (including a + cross-claim or counterclaim in a lawsuit) alleging that the Work + or a Contribution incorporated within the Work constitutes direct + or contributory patent infringement, then any patent licenses + granted to You under this License for that Work shall terminate + as of the date such litigation is filed. + +4. Redistribution. You may reproduce and distribute copies of the + Work or Derivative Works thereof in any medium, with or without + modifications, and in Source or Object form, provided that You + meet the following conditions: + + (a) You must give any other recipients of the Work or + Derivative Works a copy of this License; and + + (b) You must cause any modified files to carry prominent notices + stating that You changed the files; and + + (c) You must retain, in the Source form of any Derivative Works + that You distribute, all copyright, patent, trademark, and + attribution notices from the Source form of the Work, + excluding those notices that do not pertain to any part of + the Derivative Works; and + + (d) If the Work includes a "NOTICE" text file as part of its + distribution, then any Derivative Works that You distribute must + include a readable copy of the attribution notices contained + within such NOTICE file, excluding those notices that do not + pertain to any part of the Derivative Works, in at least one + of the following places: within a NOTICE text file distributed + as part of the Derivative Works; within the Source form or + documentation, if provided along with the Derivative Works; or, + within a display generated by the Derivative Works, if and + wherever such third-party notices normally appear. The contents + of the NOTICE file are for informational purposes only and + do not modify the License. You may add Your own attribution + notices within Derivative Works that You distribute, alongside + or as an addendum to the NOTICE text from the Work, provided + that such additional attribution notices cannot be construed + as modifying the License. + + You may add Your own copyright statement to Your modifications and + may provide additional or different license terms and conditions + for use, reproduction, or distribution of Your modifications, or + for any such Derivative Works as a whole, provided Your use, + reproduction, and distribution of the Work otherwise complies with + the conditions stated in this License. + +5. Submission of Contributions. Unless You explicitly state otherwise, + any Contribution intentionally submitted for inclusion in the Work + by You to the Licensor shall be under the terms and conditions of + this License, without any additional terms or conditions. + Notwithstanding the above, nothing herein shall supersede or modify + the terms of any separate license agreement you may have executed + with Licensor regarding such Contributions. + +6. Trademarks. This License does not grant permission to use the trade + names, trademarks, service marks, or product names of the Licensor, + except as required for reasonable and customary use in describing the + origin of the Work and reproducing the content of the NOTICE file. + +7. Disclaimer of Warranty. Unless required by applicable law or + agreed to in writing, Licensor provides the Work (and each + Contributor provides its Contributions) on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied, including, without limitation, any warranties or conditions + of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A + PARTICULAR PURPOSE. You are solely responsible for determining the + appropriateness of using or redistributing the Work and assume any + risks associated with Your exercise of permissions under this License. + +8. Limitation of Liability. In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + +9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + +END OF TERMS AND CONDITIONS diff --git a/vendor/itoa/LICENSE-MIT b/vendor/itoa/LICENSE-MIT new file mode 100644 index 0000000..31aa793 --- /dev/null +++ b/vendor/itoa/LICENSE-MIT @@ -0,0 +1,23 @@ +Permission is hereby granted, free of charge, to any +person obtaining a copy of this software and associated +documentation files (the "Software"), to deal in the +Software without restriction, including without +limitation the rights to use, copy, modify, merge, +publish, distribute, sublicense, and/or sell copies of +the Software, and to permit persons to whom the Software +is furnished to do so, subject to the following +conditions: + +The above copyright notice and this permission notice +shall be included in all copies or substantial portions +of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF +ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED +TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A +PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT +SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR +IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER +DEALINGS IN THE SOFTWARE. diff --git a/vendor/itoa/README.md b/vendor/itoa/README.md new file mode 100644 index 0000000..5728fb7 --- /dev/null +++ b/vendor/itoa/README.md @@ -0,0 +1,59 @@ +itoa +==== + +[github](https://github.com/dtolnay/itoa) +[crates.io](https://crates.io/crates/itoa) +[docs.rs](https://docs.rs/itoa) +[build status](https://github.com/dtolnay/itoa/actions?query=branch%3Amaster) + +This crate provides a fast conversion of integer primitives to decimal strings. +The implementation comes straight from [libcore] but avoids the performance +penalty of going through [`core::fmt::Formatter`]. + +See also [`ryu`] for printing floating point primitives. + +*Version requirement: rustc 1.36+* + +[libcore]: https://github.com/rust-lang/rust/blob/b8214dc6c6fc20d0a660fb5700dca9ebf51ebe89/src/libcore/fmt/num.rs#L201-L254 +[`core::fmt::Formatter`]: https://doc.rust-lang.org/std/fmt/struct.Formatter.html +[`ryu`]: https://github.com/dtolnay/ryu + +```toml +[dependencies] +itoa = "1.0" +``` + +
+ +## Example + +```rust +fn main() { + let mut buffer = itoa::Buffer::new(); + let printed = buffer.format(128u64); + assert_eq!(printed, "128"); +} +``` + +
+ +## Performance (lower is better) + +![performance](https://raw.githubusercontent.com/dtolnay/itoa/master/performance.png) + +
+ +#### License + + +Licensed under either of Apache License, Version +2.0 or MIT license at your option. + + +
+ + +Unless you explicitly state otherwise, any contribution intentionally submitted +for inclusion in this crate by you, as defined in the Apache-2.0 license, shall +be dual licensed as above, without any additional terms or conditions. + diff --git a/vendor/itoa/benches/bench.rs b/vendor/itoa/benches/bench.rs new file mode 100644 index 0000000..acd2a0c --- /dev/null +++ b/vendor/itoa/benches/bench.rs @@ -0,0 +1,55 @@ +#![feature(test)] +#![allow(non_snake_case)] +#![allow(clippy::cast_lossless)] + +extern crate test; + +macro_rules! benches { + ($($name:ident($value:expr))*) => { + mod bench_itoa_format { + use test::{Bencher, black_box}; + + $( + #[bench] + fn $name(b: &mut Bencher) { + let mut buffer = itoa::Buffer::new(); + + b.iter(|| { + let printed = buffer.format(black_box($value)); + black_box(printed); + }); + } + )* + } + + mod bench_std_fmt { + use std::io::Write; + use test::{Bencher, black_box}; + + $( + #[bench] + fn $name(b: &mut Bencher) { + let mut buf = Vec::with_capacity(40); + + b.iter(|| { + buf.clear(); + write!(&mut buf, "{}", black_box($value)).unwrap(); + black_box(&buf); + }); + } + )* + } + } +} + +benches! { + bench_u64_0(0u64) + bench_u64_half(u32::max_value() as u64) + bench_u64_max(u64::max_value()) + + bench_i16_0(0i16) + bench_i16_min(i16::min_value()) + + bench_u128_0(0u128) + bench_u128_max(u128::max_value()) +} diff --git a/vendor/itoa/src/lib.rs b/vendor/itoa/src/lib.rs new file mode 100644 index 0000000..e2fad15a --- /dev/null +++ b/vendor/itoa/src/lib.rs @@ -0,0 +1,295 @@ +//! [![github]](https://github.com/dtolnay/itoa) [![crates-io]](https://crates.io/crates/itoa) [![docs-rs]](https://docs.rs/itoa) +//! +//! [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&logo=docs.rs +//! +//!
+//! +//! This crate provides a fast conversion of integer primitives to decimal +//! strings. The implementation comes straight from [libcore] but avoids the +//! performance penalty of going through [`core::fmt::Formatter`]. +//! +//! See also [`ryu`] for printing floating point primitives. +//! +//! [libcore]: https://github.com/rust-lang/rust/blob/b8214dc6c6fc20d0a660fb5700dca9ebf51ebe89/src/libcore/fmt/num.rs#L201-L254 +//! [`core::fmt::Formatter`]: https://doc.rust-lang.org/std/fmt/struct.Formatter.html +//! [`ryu`]: https://github.com/dtolnay/ryu +//! +//! # Example +//! +//! ``` +//! fn main() { +//! let mut buffer = itoa::Buffer::new(); +//! let printed = buffer.format(128u64); +//! assert_eq!(printed, "128"); +//! } +//! ``` +//! +//! # Performance (lower is better) +//! +//! ![performance](https://raw.githubusercontent.com/dtolnay/itoa/master/performance.png) + +#![doc(html_root_url = "https://docs.rs/itoa/1.0.10")] +#![no_std] +#![allow( + clippy::cast_lossless, + clippy::cast_possible_truncation, + clippy::expl_impl_clone_on_copy, + clippy::must_use_candidate, + clippy::needless_doctest_main, + clippy::unreadable_literal +)] + +mod udiv128; + +use core::mem::{self, MaybeUninit}; +use core::{ptr, slice, str}; +#[cfg(feature = "no-panic")] +use no_panic::no_panic; + +/// A correctly sized stack allocation for the formatted integer to be written +/// into. +/// +/// # Example +/// +/// ``` +/// let mut buffer = itoa::Buffer::new(); +/// let printed = buffer.format(1234); +/// assert_eq!(printed, "1234"); +/// ``` +pub struct Buffer { + bytes: [MaybeUninit; I128_MAX_LEN], +} + +impl Default for Buffer { + #[inline] + fn default() -> Buffer { + Buffer::new() + } +} + +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 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() -> Buffer { + let bytes = [MaybeUninit::::uninit(); I128_MAX_LEN]; + Buffer { bytes } + } + + /// Print an integer into this buffer and return a reference to its string + /// representation within the buffer. + #[cfg_attr(feature = "no-panic", no_panic)] + pub fn format(&mut self, i: I) -> &str { + i.write(unsafe { + &mut *(&mut self.bytes as *mut [MaybeUninit; I128_MAX_LEN] + as *mut ::Buffer) + }) + } +} + +/// An integer that can be written into an [`itoa::Buffer`][Buffer]. +/// +/// This trait is sealed and cannot be implemented for types outside of itoa. +pub trait Integer: private::Sealed {} + +// Seal to prevent downstream implementations of the Integer trait. +mod private { + pub trait Sealed: Copy { + type Buffer: 'static; + fn write(self, buf: &mut Self::Buffer) -> &str; + } +} + +const DEC_DIGITS_LUT: &[u8] = b"\ + 0001020304050607080910111213141516171819\ + 2021222324252627282930313233343536373839\ + 4041424344454647484950515253545556575859\ + 6061626364656667686970717273747576777879\ + 8081828384858687888990919293949596979899"; + +// Adaptation of the original implementation at +// https://github.com/rust-lang/rust/blob/b8214dc6c6fc20d0a660fb5700dca9ebf51ebe89/src/libcore/fmt/num.rs#L188-L266 +macro_rules! impl_Integer { + ($($max_len:expr => $t:ident),* as $conv_fn:ident) => {$( + impl Integer for $t {} + + impl private::Sealed for $t { + type Buffer = [MaybeUninit; $max_len]; + + #[allow(unused_comparisons)] + #[inline] + #[cfg_attr(feature = "no-panic", no_panic)] + fn write(self, buf: &mut [MaybeUninit; $max_len]) -> &str { + let is_nonnegative = self >= 0; + let mut n = if is_nonnegative { + self as $conv_fn + } else { + // convert the negative num to positive by summing 1 to it's 2 complement + (!(self as $conv_fn)).wrapping_add(1) + }; + let mut curr = buf.len() as isize; + let buf_ptr = buf.as_mut_ptr() as *mut u8; + let lut_ptr = DEC_DIGITS_LUT.as_ptr(); + + unsafe { + // need at least 16 bits for the 4-characters-at-a-time to work. + if mem::size_of::<$t>() >= 2 { + // eagerly decode 4 characters at a time + while n >= 10000 { + let rem = (n % 10000) as isize; + n /= 10000; + + let d1 = (rem / 100) << 1; + let d2 = (rem % 100) << 1; + curr -= 4; + ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr.offset(curr), 2); + ptr::copy_nonoverlapping(lut_ptr.offset(d2), buf_ptr.offset(curr + 2), 2); + } + } + + // if we reach here numbers are <= 9999, so at most 4 chars long + let mut n = n as isize; // possibly reduce 64bit math + + // decode 2 more chars, if > 2 chars + if n >= 100 { + let d1 = (n % 100) << 1; + n /= 100; + curr -= 2; + ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr.offset(curr), 2); + } + + // decode last 1 or 2 chars + if n < 10 { + curr -= 1; + *buf_ptr.offset(curr) = (n as u8) + b'0'; + } else { + let d1 = n << 1; + curr -= 2; + ptr::copy_nonoverlapping(lut_ptr.offset(d1), buf_ptr.offset(curr), 2); + } + + if !is_nonnegative { + curr -= 1; + *buf_ptr.offset(curr) = b'-'; + } + } + + let len = buf.len() - curr as usize; + let bytes = unsafe { slice::from_raw_parts(buf_ptr.offset(curr), len) }; + unsafe { str::from_utf8_unchecked(bytes) } + } + } + )*}; +} + +const I8_MAX_LEN: usize = 4; +const U8_MAX_LEN: usize = 3; +const I16_MAX_LEN: usize = 6; +const U16_MAX_LEN: usize = 5; +const I32_MAX_LEN: usize = 11; +const U32_MAX_LEN: usize = 10; +const I64_MAX_LEN: usize = 20; +const U64_MAX_LEN: usize = 20; + +impl_Integer!( + I8_MAX_LEN => i8, + U8_MAX_LEN => u8, + I16_MAX_LEN => i16, + U16_MAX_LEN => u16, + I32_MAX_LEN => i32, + U32_MAX_LEN => u32 + as u32); + +impl_Integer!(I64_MAX_LEN => i64, U64_MAX_LEN => u64 as u64); + +#[cfg(target_pointer_width = "16")] +impl_Integer!(I16_MAX_LEN => isize, U16_MAX_LEN => usize as u16); + +#[cfg(target_pointer_width = "32")] +impl_Integer!(I32_MAX_LEN => isize, U32_MAX_LEN => usize as u32); + +#[cfg(target_pointer_width = "64")] +impl_Integer!(I64_MAX_LEN => isize, U64_MAX_LEN => usize as u64); + +macro_rules! impl_Integer128 { + ($($max_len:expr => $t:ident),*) => {$( + impl Integer for $t {} + + impl private::Sealed for $t { + type Buffer = [MaybeUninit; $max_len]; + + #[allow(unused_comparisons)] + #[inline] + #[cfg_attr(feature = "no-panic", no_panic)] + fn write(self, buf: &mut [MaybeUninit; $max_len]) -> &str { + let is_nonnegative = self >= 0; + let n = if is_nonnegative { + self as u128 + } else { + // convert the negative num to positive by summing 1 to it's 2 complement + (!(self as u128)).wrapping_add(1) + }; + let mut curr = buf.len() as isize; + let buf_ptr = buf.as_mut_ptr() as *mut u8; + + unsafe { + // Divide by 10^19 which is the highest power less than 2^64. + let (n, rem) = udiv128::udivmod_1e19(n); + let buf1 = buf_ptr.offset(curr - U64_MAX_LEN as isize) as *mut [MaybeUninit; U64_MAX_LEN]; + curr -= rem.write(&mut *buf1).len() as isize; + + if n != 0 { + // Memset the base10 leading zeros of rem. + let target = buf.len() as isize - 19; + ptr::write_bytes(buf_ptr.offset(target), b'0', (curr - target) as usize); + curr = target; + + // Divide by 10^19 again. + let (n, rem) = udiv128::udivmod_1e19(n); + let buf2 = buf_ptr.offset(curr - U64_MAX_LEN as isize) as *mut [MaybeUninit; U64_MAX_LEN]; + curr -= rem.write(&mut *buf2).len() as isize; + + if n != 0 { + // Memset the leading zeros. + let target = buf.len() as isize - 38; + ptr::write_bytes(buf_ptr.offset(target), b'0', (curr - target) as usize); + curr = target; + + // There is at most one digit left + // because u128::max / 10^19 / 10^19 is 3. + curr -= 1; + *buf_ptr.offset(curr) = (n as u8) + b'0'; + } + } + + if !is_nonnegative { + curr -= 1; + *buf_ptr.offset(curr) = b'-'; + } + + let len = buf.len() - curr as usize; + let bytes = slice::from_raw_parts(buf_ptr.offset(curr), len); + str::from_utf8_unchecked(bytes) + } + } + } + )*}; +} + +const U128_MAX_LEN: usize = 39; +const I128_MAX_LEN: usize = 40; + +impl_Integer128!(I128_MAX_LEN => i128, U128_MAX_LEN => u128); diff --git a/vendor/itoa/src/udiv128.rs b/vendor/itoa/src/udiv128.rs new file mode 100644 index 0000000..0587047 --- /dev/null +++ b/vendor/itoa/src/udiv128.rs @@ -0,0 +1,48 @@ +#[cfg(feature = "no-panic")] +use no_panic::no_panic; + +/// Multiply unsigned 128 bit integers, return upper 128 bits of the result +#[inline] +#[cfg_attr(feature = "no-panic", no_panic)] +fn u128_mulhi(x: u128, y: u128) -> u128 { + let x_lo = x as u64; + let x_hi = (x >> 64) as u64; + let y_lo = y as u64; + let y_hi = (y >> 64) as u64; + + // handle possibility of overflow + let carry = (x_lo as u128 * y_lo as u128) >> 64; + let m = x_lo as u128 * y_hi as u128 + carry; + let high1 = m >> 64; + + let m_lo = m as u64; + let high2 = (x_hi as u128 * y_lo as u128 + m_lo as u128) >> 64; + + x_hi as u128 * y_hi as u128 + high1 + high2 +} + +/// Divide `n` by 1e19 and return quotient and remainder +/// +/// Integer division algorithm is based on the following paper: +/// +/// T. Granlund and P. Montgomery, “Division by Invariant Integers Using Multiplication” +/// in Proc. of the SIGPLAN94 Conference on Programming Language Design and +/// Implementation, 1994, pp. 61–72 +/// +#[inline] +#[cfg_attr(feature = "no-panic", no_panic)] +pub fn udivmod_1e19(n: u128) -> (u128, u64) { + let d = 10_000_000_000_000_000_000_u64; // 10^19 + + let quot = if n < 1 << 83 { + ((n >> 19) as u64 / (d >> 19)) as u128 + } else { + u128_mulhi(n, 156927543384667019095894735580191660403) >> 62 + }; + + let rem = (n - quot * d as u128) as u64; + debug_assert_eq!(quot, n / d as u128); + debug_assert_eq!(rem as u128, n % d as u128); + + (quot, rem) +} diff --git a/vendor/itoa/tests/test.rs b/vendor/itoa/tests/test.rs new file mode 100644 index 0000000..f8275d6 --- /dev/null +++ b/vendor/itoa/tests/test.rs @@ -0,0 +1,30 @@ +#![allow(non_snake_case)] +#![allow(clippy::cast_lossless)] + +macro_rules! test { + ($($name:ident($value:expr, $expected:expr))*) => { + $( + #[test] + fn $name() { + let mut buffer = itoa::Buffer::new(); + let s = buffer.format($value); + assert_eq!(s, $expected); + } + )* + } +} + +test! { + test_u64_0(0u64, "0") + test_u64_half(u32::max_value() as u64, "4294967295") + test_u64_max(u64::max_value(), "18446744073709551615") + test_i64_min(i64::min_value(), "-9223372036854775808") + + test_i16_0(0i16, "0") + test_i16_min(i16::min_value(), "-32768") + + test_u128_0(0u128, "0") + test_u128_max(u128::max_value(), "340282366920938463463374607431768211455") + test_i128_min(i128::min_value(), "-170141183460469231731687303715884105728") + test_i128_max(i128::max_value(), "170141183460469231731687303715884105727") +} -- cgit v1.2.3