Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

9 files changed, 725 insertions, 0 deletions

diff --git a/vendor/itoa/.cargo-checksum.json b/vendor/itoa/.cargo-checksum.json
new file mode 100644
index 000000000..3422ca4a1
--- /dev/null
+++ b/vendor/itoa/.cargo-checksum.json
@@ -0,0 +1 @@
+{"files":{"Cargo.toml":"3c81fd59c059ee454f7812e8a9e90078880a4c101964ac4ce63537cec7d36c1e","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"8e9d4e6ac0c740793958bf57c3dbd62827340cf77a282633c388aff70a7c1a22","benches/bench.rs":"636f3093bd461210ad3063289d455f90669c4a1be3273bcd30898de39f02c641","src/lib.rs":"f3b4bd0934f41b8f8a8828a22a9f5ad2af1ac1e7b632743ec2de46fbb4cb0b59","src/udiv128.rs":"16394f767854452756372d74f8025f7329fd8b61a676d81edf489681a6332ee9","tests/test.rs":"f7404fc5f7cd1bdaf74a3b64a70d5b30586241ddc1ce2c82bd1b564999fcce0e"},"package":"112c678d4050afce233f4f2852bb2eb519230b3cf12f33585275537d7e41578d"}
\ No newline at end of file
diff --git a/vendor/itoa/Cargo.toml b/vendor/itoa/Cargo.toml
new file mode 100644
index 000000000..51506e7a1
--- /dev/null
+++ b/vendor/itoa/Cargo.toml
@@ -0,0 +1,30 @@
+# 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 = "1.0.2"
+authors = ["David Tolnay <dtolnay@gmail.com>"]
+exclude = [
+    "performance.png",
+    "chart/**",
+]
+description = "Fast integer primitive to string conversion"
+documentation = "https://docs.rs/itoa"
+readme = "README.md"
+categories = ["value-formatting"]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/dtolnay/itoa"
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
diff --git a/vendor/itoa/LICENSE-APACHE b/vendor/itoa/LICENSE-APACHE
new file mode 100644
index 000000000..16fe87b06
--- /dev/null
+++ b/vendor/itoa/LICENSE-APACHE
@@ -0,0 +1,201 @@
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diff --git a/vendor/itoa/LICENSE-MIT b/vendor/itoa/LICENSE-MIT
new file mode 100644
index 000000000..31aa79387
--- /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,
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+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 000000000..6e241e1c3
--- /dev/null
+++ b/vendor/itoa/README.md
@@ -0,0 +1,59 @@
+itoa
+====
+
+[<img alt="github" src="https://img.shields.io/badge/github-dtolnay/itoa-8da0cb?style=for-the-badge&labelColor=555555&logo=github" height="20">](https://github.com/dtolnay/itoa)
+[<img alt="crates.io" src="https://img.shields.io/crates/v/itoa.svg?style=for-the-badge&color=fc8d62&logo=rust" height="20">](https://crates.io/crates/itoa)
+[<img alt="docs.rs" src="https://img.shields.io/badge/docs.rs-itoa-66c2a5?style=for-the-badge&labelColor=555555&logoColor=white&logo=data:image/svg+xml;base64,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" height="20">](https://docs.rs/itoa)
+[<img alt="build status" src="https://img.shields.io/github/workflow/status/dtolnay/itoa/CI/master?style=for-the-badge" height="20">](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"
+```
+
+<br>
+
+## Example
+
+```rust
+fn main() {
+    let mut buffer = itoa::Buffer::new();
+    let printed = buffer.format(128u64);
+    assert_eq!(printed, "128");
+}
+```
+
+<br>
+
+## Performance (lower is better)
+
+![performance](https://raw.githubusercontent.com/dtolnay/itoa/master/performance.png)
+
+<br>
+
+#### License
+
+<sup>
+Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
+2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
+</sup>
+
+<br>
+
+<sub>
+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.
+</sub>
diff --git a/vendor/itoa/benches/bench.rs b/vendor/itoa/benches/bench.rs
new file mode 100644
index 000000000..acd2a0c1e
--- /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 000000000..86604aa2a
--- /dev/null
+++ b/vendor/itoa/src/lib.rs
@@ -0,0 +1,284 @@
+//! [![github]](https://github.com/dtolnay/itoa)&ensp;[![crates-io]](https://crates.io/crates/itoa)&ensp;[![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&logoColor=white&logo=data:image/svg+xml;base64,PHN2ZyByb2xlPSJpbWciIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgdmlld0JveD0iMCAwIDUxMiA1MTIiPjxwYXRoIGZpbGw9IiNmNWY1ZjUiIGQ9Ik00ODguNiAyNTAuMkwzOTIgMjE0VjEwNS41YzAtMTUtOS4zLTI4LjQtMjMuNC0zMy43bC0xMDAtMzcuNWMtOC4xLTMuMS0xNy4xLTMuMS0yNS4zIDBsLTEwMCAzNy41Yy0xNC4xIDUuMy0yMy40IDE4LjctMjMuNCAzMy43VjIxNGwtOTYuNiAzNi4yQzkuMyAyNTUuNSAwIDI2OC45IDAgMjgzLjlWMzk0YzAgMTMuNiA3LjcgMjYuMSAxOS45IDMyLjJsMTAwIDUwYzEwLjEgNS4xIDIyLjEgNS4xIDMyLjIgMGwxMDMuOS01MiAxMDMuOSA1MmMxMC4xIDUuMSAyMi4xIDUuMSAzMi4yIDBsMTAwLTUwYzEyLjItNi4xIDE5LjktMTguNiAxOS45LTMyLjJWMjgzLjljMC0xNS05LjMtMjguNC0yMy40LTMzLjd6TTM1OCAyMTQuOGwtODUgMzEuOXYtNjguMmw4NS0zN3Y3My4zek0xNTQgMTA0LjFsMTAyLTM4LjIgMTAyIDM4LjJ2LjZsLTEwMiA0MS40LTEwMi00MS40di0uNnptODQgMjkxLjFsLTg1IDQyLjV2LTc5LjFsODUtMzguOHY3NS40em0wLTExMmwtMTAyIDQxLjQtMTAyLTQxLjR2LS42bDEwMi0zOC4yIDEwMiAzOC4ydi42em0yNDAgMTEybC04NSA0Mi41di03OS4xbDg1LTM4Ljh2NzUuNHptMC0xMTJsLTEwMiA0MS40LTEwMi00MS40di0uNmwxMDItMzguMiAxMDIgMzguMnYuNnoiPjwvcGF0aD48L3N2Zz4K
+//!
+//! <br>
+//!
+//! 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/1.0.2")]
+#![no_std]
+#![allow(
+    clippy::cast_lossless,
+    clippy::cast_possible_truncation,
+    clippy::must_use_candidate,
+    clippy::unreadable_literal
+)]
+
+mod udiv128;
+
+use core::mem::{self, MaybeUninit};
+use core::{ptr, slice, str};
+
+/// 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<u8>; I128_MAX_LEN],
+}
+
+impl Default for Buffer {
+    #[inline]
+    fn default() -> Buffer {
+        Buffer::new()
+    }
+}
+
+impl Clone for Buffer {
+    #[inline]
+    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]
+    pub fn new() -> Buffer {
+        let bytes = [MaybeUninit::<u8>::uninit(); I128_MAX_LEN];
+        Buffer { bytes }
+    }
+
+    /// Print an integer into this buffer and return a reference to its string
+    /// representation within the buffer.
+    pub fn format<I: Integer>(&mut self, i: I) -> &str {
+        i.write(unsafe {
+            &mut *(&mut self.bytes as *mut [MaybeUninit<u8>; I128_MAX_LEN]
+                as *mut <I as private::Sealed>::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<u8>; $max_len];
+
+            #[allow(unused_comparisons)]
+            #[inline]
+            fn write(self, buf: &mut [MaybeUninit<u8>; $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<u8>; $max_len];
+
+            #[allow(unused_comparisons)]
+            #[inline]
+            fn write(self, buf: &mut [MaybeUninit<u8>; $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<u8>; 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<u8>; 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 000000000..df53eb526
--- /dev/null
+++ b/vendor/itoa/src/udiv128.rs
@@ -0,0 +1,43 @@
+/// Multiply unsigned 128 bit integers, return upper 128 bits of the result
+#[inline]
+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]
+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 000000000..1d7e8cb60
--- /dev/null
+++ b/vendor/itoa/tests/test.rs
@@ -0,0 +1,29 @@
+#![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")
+}