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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /third_party/rust/byteorder/src/lib.rs
parentInitial commit. (diff)
downloadfirefox-upstream.tar.xz
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Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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+/*!
+This crate provides convenience methods for encoding and decoding numbers in
+either [big-endian or little-endian order].
+
+The organization of the crate is pretty simple. A trait, [`ByteOrder`], specifies
+byte conversion methods for each type of number in Rust (sans numbers that have
+a platform dependent size like `usize` and `isize`). Two types, [`BigEndian`]
+and [`LittleEndian`] implement these methods. Finally, [`ReadBytesExt`] and
+[`WriteBytesExt`] provide convenience methods available to all types that
+implement [`Read`] and [`Write`].
+
+An alias, [`NetworkEndian`], for [`BigEndian`] is provided to help improve
+code clarity.
+
+An additional alias, [`NativeEndian`], is provided for the endianness of the
+local platform. This is convenient when serializing data for use and
+conversions are not desired.
+
+# Examples
+
+Read unsigned 16 bit big-endian integers from a [`Read`] type:
+
+```rust
+use std::io::Cursor;
+use byteorder::{BigEndian, ReadBytesExt};
+
+let mut rdr = Cursor::new(vec![2, 5, 3, 0]);
+// Note that we use type parameters to indicate which kind of byte order
+// we want!
+assert_eq!(517, rdr.read_u16::<BigEndian>().unwrap());
+assert_eq!(768, rdr.read_u16::<BigEndian>().unwrap());
+```
+
+Write unsigned 16 bit little-endian integers to a [`Write`] type:
+
+```rust
+use byteorder::{LittleEndian, WriteBytesExt};
+
+let mut wtr = vec![];
+wtr.write_u16::<LittleEndian>(517).unwrap();
+wtr.write_u16::<LittleEndian>(768).unwrap();
+assert_eq!(wtr, vec![5, 2, 0, 3]);
+```
+
+# Optional Features
+
+This crate optionally provides support for 128 bit values (`i128` and `u128`)
+when built with the `i128` feature enabled.
+
+This crate can also be used without the standard library.
+
+# Alternatives
+
+Note that as of Rust 1.32, the standard numeric types provide built-in methods
+like `to_le_bytes` and `from_le_bytes`, which support some of the same use
+cases.
+
+[big-endian or little-endian order]: https://en.wikipedia.org/wiki/Endianness
+[`ByteOrder`]: trait.ByteOrder.html
+[`BigEndian`]: enum.BigEndian.html
+[`LittleEndian`]: enum.LittleEndian.html
+[`ReadBytesExt`]: trait.ReadBytesExt.html
+[`WriteBytesExt`]: trait.WriteBytesExt.html
+[`NetworkEndian`]: type.NetworkEndian.html
+[`NativeEndian`]: type.NativeEndian.html
+[`Read`]: https://doc.rust-lang.org/std/io/trait.Read.html
+[`Write`]: https://doc.rust-lang.org/std/io/trait.Write.html
+*/
+
+#![deny(missing_docs)]
+#![cfg_attr(not(feature = "std"), no_std)]
+
+use core::{
+ convert::TryInto, fmt::Debug, hash::Hash, ptr::copy_nonoverlapping, slice,
+};
+
+#[cfg(feature = "std")]
+pub use crate::io::{ReadBytesExt, WriteBytesExt};
+
+#[cfg(feature = "std")]
+mod io;
+
+#[inline]
+fn extend_sign(val: u64, nbytes: usize) -> i64 {
+ let shift = (8 - nbytes) * 8;
+ (val << shift) as i64 >> shift
+}
+
+#[inline]
+fn extend_sign128(val: u128, nbytes: usize) -> i128 {
+ let shift = (16 - nbytes) * 8;
+ (val << shift) as i128 >> shift
+}
+
+#[inline]
+fn unextend_sign(val: i64, nbytes: usize) -> u64 {
+ let shift = (8 - nbytes) * 8;
+ (val << shift) as u64 >> shift
+}
+
+#[inline]
+fn unextend_sign128(val: i128, nbytes: usize) -> u128 {
+ let shift = (16 - nbytes) * 8;
+ (val << shift) as u128 >> shift
+}
+
+#[inline]
+fn pack_size(n: u64) -> usize {
+ if n < 1 << 8 {
+ 1
+ } else if n < 1 << 16 {
+ 2
+ } else if n < 1 << 24 {
+ 3
+ } else if n < 1 << 32 {
+ 4
+ } else if n < 1 << 40 {
+ 5
+ } else if n < 1 << 48 {
+ 6
+ } else if n < 1 << 56 {
+ 7
+ } else {
+ 8
+ }
+}
+
+#[inline]
+fn pack_size128(n: u128) -> usize {
+ if n < 1 << 8 {
+ 1
+ } else if n < 1 << 16 {
+ 2
+ } else if n < 1 << 24 {
+ 3
+ } else if n < 1 << 32 {
+ 4
+ } else if n < 1 << 40 {
+ 5
+ } else if n < 1 << 48 {
+ 6
+ } else if n < 1 << 56 {
+ 7
+ } else if n < 1 << 64 {
+ 8
+ } else if n < 1 << 72 {
+ 9
+ } else if n < 1 << 80 {
+ 10
+ } else if n < 1 << 88 {
+ 11
+ } else if n < 1 << 96 {
+ 12
+ } else if n < 1 << 104 {
+ 13
+ } else if n < 1 << 112 {
+ 14
+ } else if n < 1 << 120 {
+ 15
+ } else {
+ 16
+ }
+}
+
+mod private {
+ /// Sealed stops crates other than byteorder from implementing any traits
+ /// that use it.
+ pub trait Sealed {}
+ impl Sealed for super::LittleEndian {}
+ impl Sealed for super::BigEndian {}
+}
+
+/// `ByteOrder` describes types that can serialize integers as bytes.
+///
+/// Note that `Self` does not appear anywhere in this trait's definition!
+/// Therefore, in order to use it, you'll need to use syntax like
+/// `T::read_u16(&[0, 1])` where `T` implements `ByteOrder`.
+///
+/// This crate provides two types that implement `ByteOrder`: [`BigEndian`]
+/// and [`LittleEndian`].
+/// This trait is sealed and cannot be implemented for callers to avoid
+/// breaking backwards compatibility when adding new derived traits.
+///
+/// # Examples
+///
+/// Write and read `u32` numbers in little endian order:
+///
+/// ```rust
+/// use byteorder::{ByteOrder, LittleEndian};
+///
+/// let mut buf = [0; 4];
+/// LittleEndian::write_u32(&mut buf, 1_000_000);
+/// assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
+/// ```
+///
+/// Write and read `i16` numbers in big endian order:
+///
+/// ```rust
+/// use byteorder::{ByteOrder, BigEndian};
+///
+/// let mut buf = [0; 2];
+/// BigEndian::write_i16(&mut buf, -5_000);
+/// assert_eq!(-5_000, BigEndian::read_i16(&buf));
+/// ```
+///
+/// [`BigEndian`]: enum.BigEndian.html
+/// [`LittleEndian`]: enum.LittleEndian.html
+pub trait ByteOrder:
+ Clone
+ + Copy
+ + Debug
+ + Default
+ + Eq
+ + Hash
+ + Ord
+ + PartialEq
+ + PartialOrd
+ + private::Sealed
+{
+ /// Reads an unsigned 16 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 2`.
+ fn read_u16(buf: &[u8]) -> u16;
+
+ /// Reads an unsigned 24 bit integer from `buf`, stored in u32.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 3`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 24 bit `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_u24(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u24(&buf));
+ /// ```
+ fn read_u24(buf: &[u8]) -> u32 {
+ Self::read_uint(buf, 3) as u32
+ }
+
+ /// Reads an unsigned 32 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_u32(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
+ /// ```
+ fn read_u32(buf: &[u8]) -> u32;
+
+ /// Reads an unsigned 48 bit integer from `buf`, stored in u64.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 6`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 48 bit `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 6];
+ /// LittleEndian::write_u48(&mut buf, 1_000_000_000_000);
+ /// assert_eq!(1_000_000_000_000, LittleEndian::read_u48(&buf));
+ /// ```
+ fn read_u48(buf: &[u8]) -> u64 {
+ Self::read_uint(buf, 6) as u64
+ }
+
+ /// Reads an unsigned 64 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_u64(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u64(&buf));
+ /// ```
+ fn read_u64(buf: &[u8]) -> u64;
+
+ /// Reads an unsigned 128 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 16`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 16];
+ /// LittleEndian::write_u128(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u128(&buf));
+ /// ```
+ fn read_u128(buf: &[u8]) -> u128;
+
+ /// Reads an unsigned n-bytes integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `nbytes < 1` or `nbytes > 8` or
+ /// `buf.len() < nbytes`
+ ///
+ /// # Examples
+ ///
+ /// Write and read an n-byte number in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_uint(&mut buf, 1_000_000, 3);
+ /// assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3));
+ /// ```
+ fn read_uint(buf: &[u8], nbytes: usize) -> u64;
+
+ /// Reads an unsigned n-bytes integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `nbytes < 1` or `nbytes > 16` or
+ /// `buf.len() < nbytes`
+ ///
+ /// # Examples
+ ///
+ /// Write and read an n-byte number in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_uint128(&mut buf, 1_000_000, 3);
+ /// assert_eq!(1_000_000, LittleEndian::read_uint128(&buf, 3));
+ /// ```
+ fn read_uint128(buf: &[u8], nbytes: usize) -> u128;
+
+ /// Writes an unsigned 16 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 2`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 2];
+ /// LittleEndian::write_u16(&mut buf, 1_000);
+ /// assert_eq!(1_000, LittleEndian::read_u16(&buf));
+ /// ```
+ fn write_u16(buf: &mut [u8], n: u16);
+
+ /// Writes an unsigned 24 bit integer `n` to `buf`, stored in u32.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 3`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 24 bit `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_u24(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u24(&buf));
+ /// ```
+ fn write_u24(buf: &mut [u8], n: u32) {
+ Self::write_uint(buf, n as u64, 3)
+ }
+
+ /// Writes an unsigned 32 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_u32(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
+ /// ```
+ fn write_u32(buf: &mut [u8], n: u32);
+
+ /// Writes an unsigned 48 bit integer `n` to `buf`, stored in u64.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 6`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 48 bit `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 6];
+ /// LittleEndian::write_u48(&mut buf, 1_000_000_000_000);
+ /// assert_eq!(1_000_000_000_000, LittleEndian::read_u48(&buf));
+ /// ```
+ fn write_u48(buf: &mut [u8], n: u64) {
+ Self::write_uint(buf, n as u64, 6)
+ }
+
+ /// Writes an unsigned 64 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_u64(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u64(&buf));
+ /// ```
+ fn write_u64(buf: &mut [u8], n: u64);
+
+ /// Writes an unsigned 128 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 16`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 16];
+ /// LittleEndian::write_u128(&mut buf, 1_000_000);
+ /// assert_eq!(1_000_000, LittleEndian::read_u128(&buf));
+ /// ```
+ fn write_u128(buf: &mut [u8], n: u128);
+
+ /// Writes an unsigned integer `n` to `buf` using only `nbytes`.
+ ///
+ /// # Panics
+ ///
+ /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 8`, then
+ /// this method panics.
+ ///
+ /// # Examples
+ ///
+ /// Write and read an n-byte number in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_uint(&mut buf, 1_000_000, 3);
+ /// assert_eq!(1_000_000, LittleEndian::read_uint(&buf, 3));
+ /// ```
+ fn write_uint(buf: &mut [u8], n: u64, nbytes: usize);
+
+ /// Writes an unsigned integer `n` to `buf` using only `nbytes`.
+ ///
+ /// # Panics
+ ///
+ /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 16`, then
+ /// this method panics.
+ ///
+ /// # Examples
+ ///
+ /// Write and read an n-byte number in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_uint128(&mut buf, 1_000_000, 3);
+ /// assert_eq!(1_000_000, LittleEndian::read_uint128(&buf, 3));
+ /// ```
+ fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize);
+
+ /// Reads a signed 16 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 2`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 2];
+ /// LittleEndian::write_i16(&mut buf, -1_000);
+ /// assert_eq!(-1_000, LittleEndian::read_i16(&buf));
+ /// ```
+ #[inline]
+ fn read_i16(buf: &[u8]) -> i16 {
+ Self::read_u16(buf) as i16
+ }
+
+ /// Reads a signed 24 bit integer from `buf`, stored in i32.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 3`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 24 bit `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_i24(&mut buf, -1_000_000);
+ /// assert_eq!(-1_000_000, LittleEndian::read_i24(&buf));
+ /// ```
+ #[inline]
+ fn read_i24(buf: &[u8]) -> i32 {
+ Self::read_int(buf, 3) as i32
+ }
+
+ /// Reads a signed 32 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_i32(&mut buf, -1_000_000);
+ /// assert_eq!(-1_000_000, LittleEndian::read_i32(&buf));
+ /// ```
+ #[inline]
+ fn read_i32(buf: &[u8]) -> i32 {
+ Self::read_u32(buf) as i32
+ }
+
+ /// Reads a signed 48 bit integer from `buf`, stored in i64.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 6`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 48 bit `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 6];
+ /// LittleEndian::write_i48(&mut buf, -1_000_000_000_000);
+ /// assert_eq!(-1_000_000_000_000, LittleEndian::read_i48(&buf));
+ /// ```
+ #[inline]
+ fn read_i48(buf: &[u8]) -> i64 {
+ Self::read_int(buf, 6) as i64
+ }
+
+ /// Reads a signed 64 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_i64(&mut buf, -1_000_000_000);
+ /// assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf));
+ /// ```
+ #[inline]
+ fn read_i64(buf: &[u8]) -> i64 {
+ Self::read_u64(buf) as i64
+ }
+
+ /// Reads a signed 128 bit integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 16`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 16];
+ /// LittleEndian::write_i128(&mut buf, -1_000_000_000);
+ /// assert_eq!(-1_000_000_000, LittleEndian::read_i128(&buf));
+ /// ```
+ #[inline]
+ fn read_i128(buf: &[u8]) -> i128 {
+ Self::read_u128(buf) as i128
+ }
+
+ /// Reads a signed n-bytes integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `nbytes < 1` or `nbytes > 8` or
+ /// `buf.len() < nbytes`
+ ///
+ /// # Examples
+ ///
+ /// Write and read n-length signed numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_int(&mut buf, -1_000, 3);
+ /// assert_eq!(-1_000, LittleEndian::read_int(&buf, 3));
+ /// ```
+ #[inline]
+ fn read_int(buf: &[u8], nbytes: usize) -> i64 {
+ extend_sign(Self::read_uint(buf, nbytes), nbytes)
+ }
+
+ /// Reads a signed n-bytes integer from `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `nbytes < 1` or `nbytes > 16` or
+ /// `buf.len() < nbytes`
+ ///
+ /// # Examples
+ ///
+ /// Write and read n-length signed numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_int128(&mut buf, -1_000, 3);
+ /// assert_eq!(-1_000, LittleEndian::read_int128(&buf, 3));
+ /// ```
+ #[inline]
+ fn read_int128(buf: &[u8], nbytes: usize) -> i128 {
+ extend_sign128(Self::read_uint128(buf, nbytes), nbytes)
+ }
+
+ /// Reads a IEEE754 single-precision (4 bytes) floating point number.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let e = 2.71828;
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_f32(&mut buf, e);
+ /// assert_eq!(e, LittleEndian::read_f32(&buf));
+ /// ```
+ #[inline]
+ fn read_f32(buf: &[u8]) -> f32 {
+ f32::from_bits(Self::read_u32(buf))
+ }
+
+ /// Reads a IEEE754 double-precision (8 bytes) floating point number.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let phi = 1.6180339887;
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_f64(&mut buf, phi);
+ /// assert_eq!(phi, LittleEndian::read_f64(&buf));
+ /// ```
+ #[inline]
+ fn read_f64(buf: &[u8]) -> f64 {
+ f64::from_bits(Self::read_u64(buf))
+ }
+
+ /// Writes a signed 16 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 2`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 2];
+ /// LittleEndian::write_i16(&mut buf, -1_000);
+ /// assert_eq!(-1_000, LittleEndian::read_i16(&buf));
+ /// ```
+ #[inline]
+ fn write_i16(buf: &mut [u8], n: i16) {
+ Self::write_u16(buf, n as u16)
+ }
+
+ /// Writes a signed 24 bit integer `n` to `buf`, stored in i32.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 3`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 24 bit `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_i24(&mut buf, -1_000_000);
+ /// assert_eq!(-1_000_000, LittleEndian::read_i24(&buf));
+ /// ```
+ #[inline]
+ fn write_i24(buf: &mut [u8], n: i32) {
+ Self::write_int(buf, n as i64, 3)
+ }
+
+ /// Writes a signed 32 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_i32(&mut buf, -1_000_000);
+ /// assert_eq!(-1_000_000, LittleEndian::read_i32(&buf));
+ /// ```
+ #[inline]
+ fn write_i32(buf: &mut [u8], n: i32) {
+ Self::write_u32(buf, n as u32)
+ }
+
+ /// Writes a signed 48 bit integer `n` to `buf`, stored in i64.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 6`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read 48 bit `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 6];
+ /// LittleEndian::write_i48(&mut buf, -1_000_000_000_000);
+ /// assert_eq!(-1_000_000_000_000, LittleEndian::read_i48(&buf));
+ /// ```
+ #[inline]
+ fn write_i48(buf: &mut [u8], n: i64) {
+ Self::write_int(buf, n as i64, 6)
+ }
+
+ /// Writes a signed 64 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_i64(&mut buf, -1_000_000_000);
+ /// assert_eq!(-1_000_000_000, LittleEndian::read_i64(&buf));
+ /// ```
+ #[inline]
+ fn write_i64(buf: &mut [u8], n: i64) {
+ Self::write_u64(buf, n as u64)
+ }
+
+ /// Writes a signed 128 bit integer `n` to `buf`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 16`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read n-byte `i128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 16];
+ /// LittleEndian::write_i128(&mut buf, -1_000_000_000);
+ /// assert_eq!(-1_000_000_000, LittleEndian::read_i128(&buf));
+ /// ```
+ #[inline]
+ fn write_i128(buf: &mut [u8], n: i128) {
+ Self::write_u128(buf, n as u128)
+ }
+
+ /// Writes a signed integer `n` to `buf` using only `nbytes`.
+ ///
+ /// # Panics
+ ///
+ /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 8`, then
+ /// this method panics.
+ ///
+ /// # Examples
+ ///
+ /// Write and read an n-byte number in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_int(&mut buf, -1_000, 3);
+ /// assert_eq!(-1_000, LittleEndian::read_int(&buf, 3));
+ /// ```
+ #[inline]
+ fn write_int(buf: &mut [u8], n: i64, nbytes: usize) {
+ Self::write_uint(buf, unextend_sign(n, nbytes), nbytes)
+ }
+
+ /// Writes a signed integer `n` to `buf` using only `nbytes`.
+ ///
+ /// # Panics
+ ///
+ /// If `n` is not representable in `nbytes`, or if `nbytes` is `> 16`, then
+ /// this method panics.
+ ///
+ /// # Examples
+ ///
+ /// Write and read n-length signed numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut buf = [0; 3];
+ /// LittleEndian::write_int128(&mut buf, -1_000, 3);
+ /// assert_eq!(-1_000, LittleEndian::read_int128(&buf, 3));
+ /// ```
+ #[inline]
+ fn write_int128(buf: &mut [u8], n: i128, nbytes: usize) {
+ Self::write_uint128(buf, unextend_sign128(n, nbytes), nbytes)
+ }
+
+ /// Writes a IEEE754 single-precision (4 bytes) floating point number.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 4`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let e = 2.71828;
+ /// let mut buf = [0; 4];
+ /// LittleEndian::write_f32(&mut buf, e);
+ /// assert_eq!(e, LittleEndian::read_f32(&buf));
+ /// ```
+ #[inline]
+ fn write_f32(buf: &mut [u8], n: f32) {
+ Self::write_u32(buf, n.to_bits())
+ }
+
+ /// Writes a IEEE754 double-precision (8 bytes) floating point number.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() < 8`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let phi = 1.6180339887;
+ /// let mut buf = [0; 8];
+ /// LittleEndian::write_f64(&mut buf, phi);
+ /// assert_eq!(phi, LittleEndian::read_f64(&buf));
+ /// ```
+ #[inline]
+ fn write_f64(buf: &mut [u8], n: f64) {
+ Self::write_u64(buf, n.to_bits())
+ }
+
+ /// Reads unsigned 16 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 2*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 8];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u16_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u16_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn read_u16_into(src: &[u8], dst: &mut [u16]);
+
+ /// Reads unsigned 32 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 4*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn read_u32_into(src: &[u8], dst: &mut [u32]);
+
+ /// Reads unsigned 64 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 8*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn read_u64_into(src: &[u8], dst: &mut [u64]);
+
+ /// Reads unsigned 128 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 16*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 64];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u128_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u128_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn read_u128_into(src: &[u8], dst: &mut [u128]);
+
+ /// Reads signed 16 bit integers from `src` to `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() != 2*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 8];
+ /// let numbers_given = [1, 2, 0x0f, 0xee];
+ /// LittleEndian::write_i16_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i16_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_i16_into(src: &[u8], dst: &mut [i16]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u16, dst.len())
+ };
+ Self::read_u16_into(src, dst)
+ }
+
+ /// Reads signed 32 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 4*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_i32_into(src: &[u8], dst: &mut [i32]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u32, dst.len())
+ };
+ Self::read_u32_into(src, dst);
+ }
+
+ /// Reads signed 64 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 8*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_i64_into(src: &[u8], dst: &mut [i64]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u64, dst.len())
+ };
+ Self::read_u64_into(src, dst);
+ }
+
+ /// Reads signed 128 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 16*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 64];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i128_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i128_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_i128_into(src: &[u8], dst: &mut [i128]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u128, dst.len())
+ };
+ Self::read_u128_into(src, dst);
+ }
+
+ /// Reads IEEE754 single-precision (4 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 4*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19];
+ /// LittleEndian::write_f32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_f32_into(src: &[u8], dst: &mut [f32]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u32, dst.len())
+ };
+ Self::read_u32_into(src, dst);
+ }
+
+ /// **DEPRECATED**.
+ ///
+ /// This method is deprecated. Use `read_f32_into` instead.
+ /// Reads IEEE754 single-precision (4 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 4*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19];
+ /// LittleEndian::write_f32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f32_into_unchecked(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ #[deprecated(since = "1.3.0", note = "please use `read_f32_into` instead")]
+ fn read_f32_into_unchecked(src: &[u8], dst: &mut [f32]) {
+ Self::read_f32_into(src, dst);
+ }
+
+ /// Reads IEEE754 single-precision (4 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 8*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91];
+ /// LittleEndian::write_f64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ fn read_f64_into(src: &[u8], dst: &mut [f64]) {
+ let dst = unsafe {
+ slice::from_raw_parts_mut(dst.as_mut_ptr() as *mut u64, dst.len())
+ };
+ Self::read_u64_into(src, dst);
+ }
+
+ /// **DEPRECATED**.
+ ///
+ /// This method is deprecated. Use `read_f64_into` instead.
+ ///
+ /// Reads IEEE754 single-precision (4 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 8*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91];
+ /// LittleEndian::write_f64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f64_into_unchecked(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ #[inline]
+ #[deprecated(since = "1.3.0", note = "please use `read_f64_into` instead")]
+ fn read_f64_into_unchecked(src: &[u8], dst: &mut [f64]) {
+ Self::read_f64_into(src, dst);
+ }
+
+ /// Writes unsigned 16 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 2*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 8];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u16_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u16_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_u16_into(src: &[u16], dst: &mut [u8]);
+
+ /// Writes unsigned 32 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 4*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_u32_into(src: &[u32], dst: &mut [u8]);
+
+ /// Writes unsigned 64 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 8*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_u64_into(src: &[u64], dst: &mut [u8]);
+
+ /// Writes unsigned 128 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 16*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `u128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 64];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_u128_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_u128_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_u128_into(src: &[u128], dst: &mut [u8]);
+
+ /// Writes signed 8 bit integers from `src` into `dst`.
+ ///
+ /// Note that since each `i8` is a single byte, no byte order conversions
+ /// are used. This method is included because it provides a safe, simple
+ /// way for the caller to write from a `&[i8]` buffer. (Without this
+ /// method, the caller would have to either use `unsafe` code or convert
+ /// each byte to `u8` individually.)
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() != src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i8` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian, ReadBytesExt};
+ ///
+ /// let mut bytes = [0; 4];
+ /// let numbers_given = [1, 2, 0xf, 0xe];
+ /// LittleEndian::write_i8_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// bytes.as_ref().read_i8_into(&mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_i8_into(src: &[i8], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u8, src.len())
+ };
+ dst.copy_from_slice(src);
+ }
+
+ /// Writes signed 16 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `buf.len() != 2*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i16` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 8];
+ /// let numbers_given = [1, 2, 0x0f, 0xee];
+ /// LittleEndian::write_i16_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i16_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_i16_into(src: &[i16], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u16, src.len())
+ };
+ Self::write_u16_into(src, dst);
+ }
+
+ /// Writes signed 32 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 4*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_i32_into(src: &[i32], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u32, src.len())
+ };
+ Self::write_u32_into(src, dst);
+ }
+
+ /// Writes signed 64 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 8*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_i64_into(src: &[i64], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u64, src.len())
+ };
+ Self::write_u64_into(src, dst);
+ }
+
+ /// Writes signed 128 bit integers from `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `dst.len() != 16*src.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `i128` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 64];
+ /// let numbers_given = [1, 2, 0xf00f, 0xffee];
+ /// LittleEndian::write_i128_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0; 4];
+ /// LittleEndian::read_i128_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_i128_into(src: &[i128], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u128, src.len())
+ };
+ Self::write_u128_into(src, dst);
+ }
+
+ /// Writes IEEE754 single-precision (4 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 4*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f32` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 16];
+ /// let numbers_given = [1.0, 2.0, 31.312e31, -11.32e19];
+ /// LittleEndian::write_f32_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f32_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_f32_into(src: &[f32], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u32, src.len())
+ };
+ Self::write_u32_into(src, dst);
+ }
+
+ /// Writes IEEE754 double-precision (8 bytes) floating point numbers from
+ /// `src` into `dst`.
+ ///
+ /// # Panics
+ ///
+ /// Panics when `src.len() != 8*dst.len()`.
+ ///
+ /// # Examples
+ ///
+ /// Write and read `f64` numbers in little endian order:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, LittleEndian};
+ ///
+ /// let mut bytes = [0; 32];
+ /// let numbers_given = [1.0, 2.0, 31.312e211, -11.32e91];
+ /// LittleEndian::write_f64_into(&numbers_given, &mut bytes);
+ ///
+ /// let mut numbers_got = [0.0; 4];
+ /// LittleEndian::read_f64_into(&bytes, &mut numbers_got);
+ /// assert_eq!(numbers_given, numbers_got);
+ /// ```
+ fn write_f64_into(src: &[f64], dst: &mut [u8]) {
+ let src = unsafe {
+ slice::from_raw_parts(src.as_ptr() as *const u64, src.len())
+ };
+ Self::write_u64_into(src, dst);
+ }
+
+ /// Converts the given slice of unsigned 16 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_u16(&mut numbers);
+ /// assert_eq!(numbers, [5u16.to_be(), 65000u16.to_be()]);
+ /// ```
+ fn from_slice_u16(numbers: &mut [u16]);
+
+ /// Converts the given slice of unsigned 32 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_u32(&mut numbers);
+ /// assert_eq!(numbers, [5u32.to_be(), 65000u32.to_be()]);
+ /// ```
+ fn from_slice_u32(numbers: &mut [u32]);
+
+ /// Converts the given slice of unsigned 64 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_u64(&mut numbers);
+ /// assert_eq!(numbers, [5u64.to_be(), 65000u64.to_be()]);
+ /// ```
+ fn from_slice_u64(numbers: &mut [u64]);
+
+ /// Converts the given slice of unsigned 128 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_u128(&mut numbers);
+ /// assert_eq!(numbers, [5u128.to_be(), 65000u128.to_be()]);
+ /// ```
+ fn from_slice_u128(numbers: &mut [u128]);
+
+ /// Converts the given slice of signed 16 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 6500];
+ /// BigEndian::from_slice_i16(&mut numbers);
+ /// assert_eq!(numbers, [5i16.to_be(), 6500i16.to_be()]);
+ /// ```
+ #[inline]
+ fn from_slice_i16(src: &mut [i16]) {
+ let src = unsafe {
+ slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u16, src.len())
+ };
+ Self::from_slice_u16(src);
+ }
+
+ /// Converts the given slice of signed 32 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_i32(&mut numbers);
+ /// assert_eq!(numbers, [5i32.to_be(), 65000i32.to_be()]);
+ /// ```
+ #[inline]
+ fn from_slice_i32(src: &mut [i32]) {
+ let src = unsafe {
+ slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u32, src.len())
+ };
+ Self::from_slice_u32(src);
+ }
+
+ /// Converts the given slice of signed 64 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_i64(&mut numbers);
+ /// assert_eq!(numbers, [5i64.to_be(), 65000i64.to_be()]);
+ /// ```
+ #[inline]
+ fn from_slice_i64(src: &mut [i64]) {
+ let src = unsafe {
+ slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u64, src.len())
+ };
+ Self::from_slice_u64(src);
+ }
+
+ /// Converts the given slice of signed 128 bit integers to a particular
+ /// endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ ///
+ /// # Examples
+ ///
+ /// Convert the host platform's endianness to big-endian:
+ ///
+ /// ```rust
+ /// use byteorder::{ByteOrder, BigEndian};
+ ///
+ /// let mut numbers = [5, 65000];
+ /// BigEndian::from_slice_i128(&mut numbers);
+ /// assert_eq!(numbers, [5i128.to_be(), 65000i128.to_be()]);
+ /// ```
+ #[inline]
+ fn from_slice_i128(src: &mut [i128]) {
+ let src = unsafe {
+ slice::from_raw_parts_mut(src.as_mut_ptr() as *mut u128, src.len())
+ };
+ Self::from_slice_u128(src);
+ }
+
+ /// Converts the given slice of IEEE754 single-precision (4 bytes) floating
+ /// point numbers to a particular endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ fn from_slice_f32(numbers: &mut [f32]);
+
+ /// Converts the given slice of IEEE754 double-precision (8 bytes) floating
+ /// point numbers to a particular endianness.
+ ///
+ /// If the endianness matches the endianness of the host platform, then
+ /// this is a no-op.
+ fn from_slice_f64(numbers: &mut [f64]);
+}
+
+/// Defines big-endian serialization.
+///
+/// Note that this type has no value constructor. It is used purely at the
+/// type level.
+///
+/// # Examples
+///
+/// Write and read `u32` numbers in big endian order:
+///
+/// ```rust
+/// use byteorder::{ByteOrder, BigEndian};
+///
+/// let mut buf = [0; 4];
+/// BigEndian::write_u32(&mut buf, 1_000_000);
+/// assert_eq!(1_000_000, BigEndian::read_u32(&buf));
+/// ```
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub enum BigEndian {}
+
+impl Default for BigEndian {
+ fn default() -> BigEndian {
+ panic!("BigEndian default")
+ }
+}
+
+/// A type alias for [`BigEndian`].
+///
+/// [`BigEndian`]: enum.BigEndian.html
+pub type BE = BigEndian;
+
+/// Defines little-endian serialization.
+///
+/// Note that this type has no value constructor. It is used purely at the
+/// type level.
+///
+/// # Examples
+///
+/// Write and read `u32` numbers in little endian order:
+///
+/// ```rust
+/// use byteorder::{ByteOrder, LittleEndian};
+///
+/// let mut buf = [0; 4];
+/// LittleEndian::write_u32(&mut buf, 1_000_000);
+/// assert_eq!(1_000_000, LittleEndian::read_u32(&buf));
+/// ```
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub enum LittleEndian {}
+
+impl Default for LittleEndian {
+ fn default() -> LittleEndian {
+ panic!("LittleEndian default")
+ }
+}
+
+/// A type alias for [`LittleEndian`].
+///
+/// [`LittleEndian`]: enum.LittleEndian.html
+pub type LE = LittleEndian;
+
+/// Defines network byte order serialization.
+///
+/// Network byte order is defined by [RFC 1700][1] to be big-endian, and is
+/// referred to in several protocol specifications. This type is an alias of
+/// [`BigEndian`].
+///
+/// [1]: https://tools.ietf.org/html/rfc1700
+///
+/// Note that this type has no value constructor. It is used purely at the
+/// type level.
+///
+/// # Examples
+///
+/// Write and read `i16` numbers in big endian order:
+///
+/// ```rust
+/// use byteorder::{ByteOrder, NetworkEndian, BigEndian};
+///
+/// let mut buf = [0; 2];
+/// BigEndian::write_i16(&mut buf, -5_000);
+/// assert_eq!(-5_000, NetworkEndian::read_i16(&buf));
+/// ```
+///
+/// [`BigEndian`]: enum.BigEndian.html
+pub type NetworkEndian = BigEndian;
+
+/// Defines system native-endian serialization.
+///
+/// Note that this type has no value constructor. It is used purely at the
+/// type level.
+///
+/// On this platform, this is an alias for [`LittleEndian`].
+///
+/// [`LittleEndian`]: enum.LittleEndian.html
+#[cfg(target_endian = "little")]
+pub type NativeEndian = LittleEndian;
+
+/// Defines system native-endian serialization.
+///
+/// Note that this type has no value constructor. It is used purely at the
+/// type level.
+///
+/// On this platform, this is an alias for [`BigEndian`].
+///
+/// [`BigEndian`]: enum.BigEndian.html
+#[cfg(target_endian = "big")]
+pub type NativeEndian = BigEndian;
+
+/// Copies $size bytes from a number $n to a &mut [u8] $dst. $ty represents the
+/// numeric type of $n and $which must be either to_be or to_le, depending on
+/// which endianness one wants to use when writing to $dst.
+///
+/// This macro is only safe to call when $ty is a numeric type and $size ==
+/// size_of::<$ty>() and where $dst is a &mut [u8].
+macro_rules! unsafe_write_num_bytes {
+ ($ty:ty, $size:expr, $n:expr, $dst:expr, $which:ident) => {{
+ assert!($size <= $dst.len());
+ unsafe {
+ // N.B. https://github.com/rust-lang/rust/issues/22776
+ let bytes = *(&$n.$which() as *const _ as *const [u8; $size]);
+ copy_nonoverlapping((&bytes).as_ptr(), $dst.as_mut_ptr(), $size);
+ }
+ }};
+}
+
+/// Copies a &[u8] $src into a &mut [<numeric>] $dst for the endianness given
+/// by $which (must be either to_be or to_le).
+///
+/// This macro is only safe to call when $src and $dst are &[u8] and &mut [u8],
+/// respectively. The macro will panic if $src.len() != $size * $dst.len(),
+/// where $size represents the size of the integers encoded in $src.
+macro_rules! unsafe_read_slice {
+ ($src:expr, $dst:expr, $size:expr, $which:ident) => {{
+ assert_eq!($src.len(), $size * $dst.len());
+
+ unsafe {
+ copy_nonoverlapping(
+ $src.as_ptr(),
+ $dst.as_mut_ptr() as *mut u8,
+ $src.len(),
+ );
+ }
+ for v in $dst.iter_mut() {
+ *v = v.$which();
+ }
+ }};
+}
+
+/// Copies a &[$ty] $src into a &mut [u8] $dst, where $ty must be a numeric
+/// type. This panics if size_of::<$ty>() * $src.len() != $dst.len().
+///
+/// This macro is only safe to call when $src is a slice of numeric types and
+/// $dst is a &mut [u8] and where $ty represents the type of the integers in
+/// $src.
+macro_rules! unsafe_write_slice_native {
+ ($src:expr, $dst:expr, $ty:ty) => {{
+ let size = core::mem::size_of::<$ty>();
+ assert_eq!(size * $src.len(), $dst.len());
+
+ unsafe {
+ copy_nonoverlapping(
+ $src.as_ptr() as *const u8,
+ $dst.as_mut_ptr(),
+ $dst.len(),
+ );
+ }
+ }};
+}
+
+macro_rules! write_slice {
+ ($src:expr, $dst:expr, $ty:ty, $size:expr, $write:expr) => {{
+ assert!($size == ::core::mem::size_of::<$ty>());
+ assert_eq!($size * $src.len(), $dst.len());
+
+ for (&n, chunk) in $src.iter().zip($dst.chunks_mut($size)) {
+ $write(chunk, n);
+ }
+ }};
+}
+
+impl ByteOrder for BigEndian {
+ #[inline]
+ fn read_u16(buf: &[u8]) -> u16 {
+ u16::from_be_bytes(buf[..2].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u32(buf: &[u8]) -> u32 {
+ u32::from_be_bytes(buf[..4].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u64(buf: &[u8]) -> u64 {
+ u64::from_be_bytes(buf[..8].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u128(buf: &[u8]) -> u128 {
+ u128::from_be_bytes(buf[..16].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_uint(buf: &[u8], nbytes: usize) -> u64 {
+ assert!(1 <= nbytes && nbytes <= 8 && nbytes <= buf.len());
+ let mut out = 0u64;
+ let ptr_out = &mut out as *mut u64 as *mut u8;
+ unsafe {
+ copy_nonoverlapping(
+ buf.as_ptr(),
+ ptr_out.offset((8 - nbytes) as isize),
+ nbytes,
+ );
+ }
+ out.to_be()
+ }
+
+ #[inline]
+ fn read_uint128(buf: &[u8], nbytes: usize) -> u128 {
+ assert!(1 <= nbytes && nbytes <= 16 && nbytes <= buf.len());
+ let mut out: u128 = 0;
+ let ptr_out = &mut out as *mut u128 as *mut u8;
+ unsafe {
+ copy_nonoverlapping(
+ buf.as_ptr(),
+ ptr_out.offset((16 - nbytes) as isize),
+ nbytes,
+ );
+ }
+ out.to_be()
+ }
+
+ #[inline]
+ fn write_u16(buf: &mut [u8], n: u16) {
+ unsafe_write_num_bytes!(u16, 2, n, buf, to_be);
+ }
+
+ #[inline]
+ fn write_u32(buf: &mut [u8], n: u32) {
+ unsafe_write_num_bytes!(u32, 4, n, buf, to_be);
+ }
+
+ #[inline]
+ fn write_u64(buf: &mut [u8], n: u64) {
+ unsafe_write_num_bytes!(u64, 8, n, buf, to_be);
+ }
+
+ #[inline]
+ fn write_u128(buf: &mut [u8], n: u128) {
+ unsafe_write_num_bytes!(u128, 16, n, buf, to_be);
+ }
+
+ #[inline]
+ fn write_uint(buf: &mut [u8], n: u64, nbytes: usize) {
+ assert!(pack_size(n) <= nbytes && nbytes <= 8);
+ assert!(nbytes <= buf.len());
+ unsafe {
+ let bytes = *(&n.to_be() as *const u64 as *const [u8; 8]);
+ copy_nonoverlapping(
+ bytes.as_ptr().offset((8 - nbytes) as isize),
+ buf.as_mut_ptr(),
+ nbytes,
+ );
+ }
+ }
+
+ #[inline]
+ fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize) {
+ assert!(pack_size128(n) <= nbytes && nbytes <= 16);
+ assert!(nbytes <= buf.len());
+ unsafe {
+ let bytes = *(&n.to_be() as *const u128 as *const [u8; 16]);
+ copy_nonoverlapping(
+ bytes.as_ptr().offset((16 - nbytes) as isize),
+ buf.as_mut_ptr(),
+ nbytes,
+ );
+ }
+ }
+
+ #[inline]
+ fn read_u16_into(src: &[u8], dst: &mut [u16]) {
+ unsafe_read_slice!(src, dst, 2, to_be);
+ }
+
+ #[inline]
+ fn read_u32_into(src: &[u8], dst: &mut [u32]) {
+ unsafe_read_slice!(src, dst, 4, to_be);
+ }
+
+ #[inline]
+ fn read_u64_into(src: &[u8], dst: &mut [u64]) {
+ unsafe_read_slice!(src, dst, 8, to_be);
+ }
+
+ #[inline]
+ fn read_u128_into(src: &[u8], dst: &mut [u128]) {
+ unsafe_read_slice!(src, dst, 16, to_be);
+ }
+
+ #[inline]
+ fn write_u16_into(src: &[u16], dst: &mut [u8]) {
+ if cfg!(target_endian = "big") {
+ unsafe_write_slice_native!(src, dst, u16);
+ } else {
+ write_slice!(src, dst, u16, 2, Self::write_u16);
+ }
+ }
+
+ #[inline]
+ fn write_u32_into(src: &[u32], dst: &mut [u8]) {
+ if cfg!(target_endian = "big") {
+ unsafe_write_slice_native!(src, dst, u32);
+ } else {
+ write_slice!(src, dst, u32, 4, Self::write_u32);
+ }
+ }
+
+ #[inline]
+ fn write_u64_into(src: &[u64], dst: &mut [u8]) {
+ if cfg!(target_endian = "big") {
+ unsafe_write_slice_native!(src, dst, u64);
+ } else {
+ write_slice!(src, dst, u64, 8, Self::write_u64);
+ }
+ }
+
+ #[inline]
+ fn write_u128_into(src: &[u128], dst: &mut [u8]) {
+ if cfg!(target_endian = "big") {
+ unsafe_write_slice_native!(src, dst, u128);
+ } else {
+ write_slice!(src, dst, u128, 16, Self::write_u128);
+ }
+ }
+
+ #[inline]
+ fn from_slice_u16(numbers: &mut [u16]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ *n = n.to_be();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u32(numbers: &mut [u32]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ *n = n.to_be();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u64(numbers: &mut [u64]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ *n = n.to_be();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u128(numbers: &mut [u128]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ *n = n.to_be();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_f32(numbers: &mut [f32]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ unsafe {
+ let int = *(n as *const f32 as *const u32);
+ *n = *(&int.to_be() as *const u32 as *const f32);
+ }
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_f64(numbers: &mut [f64]) {
+ if cfg!(target_endian = "little") {
+ for n in numbers {
+ unsafe {
+ let int = *(n as *const f64 as *const u64);
+ *n = *(&int.to_be() as *const u64 as *const f64);
+ }
+ }
+ }
+ }
+}
+
+impl ByteOrder for LittleEndian {
+ #[inline]
+ fn read_u16(buf: &[u8]) -> u16 {
+ u16::from_le_bytes(buf[..2].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u32(buf: &[u8]) -> u32 {
+ u32::from_le_bytes(buf[..4].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u64(buf: &[u8]) -> u64 {
+ u64::from_le_bytes(buf[..8].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_u128(buf: &[u8]) -> u128 {
+ u128::from_le_bytes(buf[..16].try_into().unwrap())
+ }
+
+ #[inline]
+ fn read_uint(buf: &[u8], nbytes: usize) -> u64 {
+ assert!(1 <= nbytes && nbytes <= 8 && nbytes <= buf.len());
+ let mut out = 0u64;
+ let ptr_out = &mut out as *mut u64 as *mut u8;
+ unsafe {
+ copy_nonoverlapping(buf.as_ptr(), ptr_out, nbytes);
+ }
+ out.to_le()
+ }
+
+ #[inline]
+ fn read_uint128(buf: &[u8], nbytes: usize) -> u128 {
+ assert!(1 <= nbytes && nbytes <= 16 && nbytes <= buf.len());
+ let mut out: u128 = 0;
+ let ptr_out = &mut out as *mut u128 as *mut u8;
+ unsafe {
+ copy_nonoverlapping(buf.as_ptr(), ptr_out, nbytes);
+ }
+ out.to_le()
+ }
+
+ #[inline]
+ fn write_u16(buf: &mut [u8], n: u16) {
+ unsafe_write_num_bytes!(u16, 2, n, buf, to_le);
+ }
+
+ #[inline]
+ fn write_u32(buf: &mut [u8], n: u32) {
+ unsafe_write_num_bytes!(u32, 4, n, buf, to_le);
+ }
+
+ #[inline]
+ fn write_u64(buf: &mut [u8], n: u64) {
+ unsafe_write_num_bytes!(u64, 8, n, buf, to_le);
+ }
+
+ #[inline]
+ fn write_u128(buf: &mut [u8], n: u128) {
+ unsafe_write_num_bytes!(u128, 16, n, buf, to_le);
+ }
+
+ #[inline]
+ fn write_uint(buf: &mut [u8], n: u64, nbytes: usize) {
+ assert!(pack_size(n as u64) <= nbytes && nbytes <= 8);
+ assert!(nbytes <= buf.len());
+ unsafe {
+ let bytes = *(&n.to_le() as *const u64 as *const [u8; 8]);
+ copy_nonoverlapping(bytes.as_ptr(), buf.as_mut_ptr(), nbytes);
+ }
+ }
+
+ #[inline]
+ fn write_uint128(buf: &mut [u8], n: u128, nbytes: usize) {
+ assert!(pack_size128(n as u128) <= nbytes && nbytes <= 16);
+ assert!(nbytes <= buf.len());
+ unsafe {
+ let bytes = *(&n.to_le() as *const u128 as *const [u8; 16]);
+ copy_nonoverlapping(bytes.as_ptr(), buf.as_mut_ptr(), nbytes);
+ }
+ }
+
+ #[inline]
+ fn read_u16_into(src: &[u8], dst: &mut [u16]) {
+ unsafe_read_slice!(src, dst, 2, to_le);
+ }
+
+ #[inline]
+ fn read_u32_into(src: &[u8], dst: &mut [u32]) {
+ unsafe_read_slice!(src, dst, 4, to_le);
+ }
+
+ #[inline]
+ fn read_u64_into(src: &[u8], dst: &mut [u64]) {
+ unsafe_read_slice!(src, dst, 8, to_le);
+ }
+
+ #[inline]
+ fn read_u128_into(src: &[u8], dst: &mut [u128]) {
+ unsafe_read_slice!(src, dst, 16, to_le);
+ }
+
+ #[inline]
+ fn write_u16_into(src: &[u16], dst: &mut [u8]) {
+ if cfg!(target_endian = "little") {
+ unsafe_write_slice_native!(src, dst, u16);
+ } else {
+ write_slice!(src, dst, u16, 2, Self::write_u16);
+ }
+ }
+
+ #[inline]
+ fn write_u32_into(src: &[u32], dst: &mut [u8]) {
+ if cfg!(target_endian = "little") {
+ unsafe_write_slice_native!(src, dst, u32);
+ } else {
+ write_slice!(src, dst, u32, 4, Self::write_u32);
+ }
+ }
+
+ #[inline]
+ fn write_u64_into(src: &[u64], dst: &mut [u8]) {
+ if cfg!(target_endian = "little") {
+ unsafe_write_slice_native!(src, dst, u64);
+ } else {
+ write_slice!(src, dst, u64, 8, Self::write_u64);
+ }
+ }
+
+ #[inline]
+ fn write_u128_into(src: &[u128], dst: &mut [u8]) {
+ if cfg!(target_endian = "little") {
+ unsafe_write_slice_native!(src, dst, u128);
+ } else {
+ write_slice!(src, dst, u128, 16, Self::write_u128);
+ }
+ }
+
+ #[inline]
+ fn from_slice_u16(numbers: &mut [u16]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ *n = n.to_le();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u32(numbers: &mut [u32]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ *n = n.to_le();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u64(numbers: &mut [u64]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ *n = n.to_le();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_u128(numbers: &mut [u128]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ *n = n.to_le();
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_f32(numbers: &mut [f32]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ unsafe {
+ let int = *(n as *const f32 as *const u32);
+ *n = *(&int.to_le() as *const u32 as *const f32);
+ }
+ }
+ }
+ }
+
+ #[inline]
+ fn from_slice_f64(numbers: &mut [f64]) {
+ if cfg!(target_endian = "big") {
+ for n in numbers {
+ unsafe {
+ let int = *(n as *const f64 as *const u64);
+ *n = *(&int.to_le() as *const u64 as *const f64);
+ }
+ }
+ }
+ }
+}
+
+#[cfg(test)]
+mod test {
+ use quickcheck::{Arbitrary, Gen, QuickCheck, StdGen, Testable};
+ use rand::{thread_rng, Rng};
+
+ pub const U24_MAX: u32 = 16_777_215;
+ pub const I24_MAX: i32 = 8_388_607;
+ pub const U48_MAX: u64 = 281_474_976_710_655;
+ pub const I48_MAX: i64 = 140_737_488_355_327;
+
+ pub const U64_MAX: u64 = ::core::u64::MAX;
+ pub const I64_MAX: u64 = ::core::i64::MAX as u64;
+
+ macro_rules! calc_max {
+ ($max:expr, $bytes:expr) => {
+ calc_max!($max, $bytes, 8)
+ };
+ ($max:expr, $bytes:expr, $maxbytes:expr) => {
+ ($max - 1) >> (8 * ($maxbytes - $bytes))
+ };
+ }
+
+ #[derive(Clone, Debug)]
+ pub struct Wi128<T>(pub T);
+
+ impl<T: Clone> Wi128<T> {
+ pub fn clone(&self) -> T {
+ self.0.clone()
+ }
+ }
+
+ impl<T: PartialEq> PartialEq<T> for Wi128<T> {
+ fn eq(&self, other: &T) -> bool {
+ self.0.eq(other)
+ }
+ }
+
+ impl Arbitrary for Wi128<u128> {
+ fn arbitrary<G: Gen>(gen: &mut G) -> Wi128<u128> {
+ let max = calc_max!(::core::u128::MAX, gen.size(), 16);
+ let output = (gen.gen::<u64>() as u128)
+ | ((gen.gen::<u64>() as u128) << 64);
+ Wi128(output & (max - 1))
+ }
+ }
+
+ impl Arbitrary for Wi128<i128> {
+ fn arbitrary<G: Gen>(gen: &mut G) -> Wi128<i128> {
+ let max = calc_max!(::core::i128::MAX, gen.size(), 16);
+ let output = (gen.gen::<i64>() as i128)
+ | ((gen.gen::<i64>() as i128) << 64);
+ Wi128(output & (max - 1))
+ }
+ }
+
+ pub fn qc_sized<A: Testable>(f: A, size: u64) {
+ QuickCheck::new()
+ .gen(StdGen::new(thread_rng(), size as usize))
+ .tests(1_00)
+ .max_tests(10_000)
+ .quickcheck(f);
+ }
+
+ macro_rules! qc_byte_order {
+ ($name:ident, $ty_int:ty, $max:expr,
+ $bytes:expr, $read:ident, $write:ident) => {
+ mod $name {
+ #[allow(unused_imports)]
+ use super::{qc_sized, Wi128};
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+
+ #[test]
+ fn big_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut buf = [0; 16];
+ BigEndian::$write(&mut buf, n.clone(), $bytes);
+ n == BigEndian::$read(&buf[..$bytes], $bytes)
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+
+ #[test]
+ fn little_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut buf = [0; 16];
+ LittleEndian::$write(&mut buf, n.clone(), $bytes);
+ n == LittleEndian::$read(&buf[..$bytes], $bytes)
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+
+ #[test]
+ fn native_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut buf = [0; 16];
+ NativeEndian::$write(&mut buf, n.clone(), $bytes);
+ n == NativeEndian::$read(&buf[..$bytes], $bytes)
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+ }
+ };
+ ($name:ident, $ty_int:ty, $max:expr,
+ $read:ident, $write:ident) => {
+ mod $name {
+ #[allow(unused_imports)]
+ use super::{qc_sized, Wi128};
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+ use core::mem::size_of;
+
+ #[test]
+ fn big_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let bytes = size_of::<$ty_int>();
+ let mut buf = [0; 16];
+ BigEndian::$write(&mut buf[16 - bytes..], n.clone());
+ n == BigEndian::$read(&buf[16 - bytes..])
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+
+ #[test]
+ fn little_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let bytes = size_of::<$ty_int>();
+ let mut buf = [0; 16];
+ LittleEndian::$write(&mut buf[..bytes], n.clone());
+ n == LittleEndian::$read(&buf[..bytes])
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+
+ #[test]
+ fn native_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let bytes = size_of::<$ty_int>();
+ let mut buf = [0; 16];
+ NativeEndian::$write(&mut buf[..bytes], n.clone());
+ n == NativeEndian::$read(&buf[..bytes])
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+ }
+ };
+ }
+
+ qc_byte_order!(
+ prop_u16,
+ u16,
+ ::core::u16::MAX as u64,
+ read_u16,
+ write_u16
+ );
+ qc_byte_order!(
+ prop_i16,
+ i16,
+ ::core::i16::MAX as u64,
+ read_i16,
+ write_i16
+ );
+ qc_byte_order!(
+ prop_u24,
+ u32,
+ crate::test::U24_MAX as u64,
+ read_u24,
+ write_u24
+ );
+ qc_byte_order!(
+ prop_i24,
+ i32,
+ crate::test::I24_MAX as u64,
+ read_i24,
+ write_i24
+ );
+ qc_byte_order!(
+ prop_u32,
+ u32,
+ ::core::u32::MAX as u64,
+ read_u32,
+ write_u32
+ );
+ qc_byte_order!(
+ prop_i32,
+ i32,
+ ::core::i32::MAX as u64,
+ read_i32,
+ write_i32
+ );
+ qc_byte_order!(
+ prop_u48,
+ u64,
+ crate::test::U48_MAX as u64,
+ read_u48,
+ write_u48
+ );
+ qc_byte_order!(
+ prop_i48,
+ i64,
+ crate::test::I48_MAX as u64,
+ read_i48,
+ write_i48
+ );
+ qc_byte_order!(
+ prop_u64,
+ u64,
+ ::core::u64::MAX as u64,
+ read_u64,
+ write_u64
+ );
+ qc_byte_order!(
+ prop_i64,
+ i64,
+ ::core::i64::MAX as u64,
+ read_i64,
+ write_i64
+ );
+ qc_byte_order!(
+ prop_f32,
+ f32,
+ ::core::u64::MAX as u64,
+ read_f32,
+ write_f32
+ );
+ qc_byte_order!(
+ prop_f64,
+ f64,
+ ::core::i64::MAX as u64,
+ read_f64,
+ write_f64
+ );
+
+ qc_byte_order!(prop_u128, Wi128<u128>, 16 + 1, read_u128, write_u128);
+ qc_byte_order!(prop_i128, Wi128<i128>, 16 + 1, read_i128, write_i128);
+
+ qc_byte_order!(
+ prop_uint_1,
+ u64,
+ calc_max!(super::U64_MAX, 1),
+ 1,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_2,
+ u64,
+ calc_max!(super::U64_MAX, 2),
+ 2,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_3,
+ u64,
+ calc_max!(super::U64_MAX, 3),
+ 3,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_4,
+ u64,
+ calc_max!(super::U64_MAX, 4),
+ 4,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_5,
+ u64,
+ calc_max!(super::U64_MAX, 5),
+ 5,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_6,
+ u64,
+ calc_max!(super::U64_MAX, 6),
+ 6,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_7,
+ u64,
+ calc_max!(super::U64_MAX, 7),
+ 7,
+ read_uint,
+ write_uint
+ );
+ qc_byte_order!(
+ prop_uint_8,
+ u64,
+ calc_max!(super::U64_MAX, 8),
+ 8,
+ read_uint,
+ write_uint
+ );
+
+ qc_byte_order!(
+ prop_uint128_1,
+ Wi128<u128>,
+ 1,
+ 1,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_2,
+ Wi128<u128>,
+ 2,
+ 2,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_3,
+ Wi128<u128>,
+ 3,
+ 3,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_4,
+ Wi128<u128>,
+ 4,
+ 4,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_5,
+ Wi128<u128>,
+ 5,
+ 5,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_6,
+ Wi128<u128>,
+ 6,
+ 6,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_7,
+ Wi128<u128>,
+ 7,
+ 7,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_8,
+ Wi128<u128>,
+ 8,
+ 8,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_9,
+ Wi128<u128>,
+ 9,
+ 9,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_10,
+ Wi128<u128>,
+ 10,
+ 10,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_11,
+ Wi128<u128>,
+ 11,
+ 11,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_12,
+ Wi128<u128>,
+ 12,
+ 12,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_13,
+ Wi128<u128>,
+ 13,
+ 13,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_14,
+ Wi128<u128>,
+ 14,
+ 14,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_15,
+ Wi128<u128>,
+ 15,
+ 15,
+ read_uint128,
+ write_uint128
+ );
+ qc_byte_order!(
+ prop_uint128_16,
+ Wi128<u128>,
+ 16,
+ 16,
+ read_uint128,
+ write_uint128
+ );
+
+ qc_byte_order!(
+ prop_int_1,
+ i64,
+ calc_max!(super::I64_MAX, 1),
+ 1,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_2,
+ i64,
+ calc_max!(super::I64_MAX, 2),
+ 2,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_3,
+ i64,
+ calc_max!(super::I64_MAX, 3),
+ 3,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_4,
+ i64,
+ calc_max!(super::I64_MAX, 4),
+ 4,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_5,
+ i64,
+ calc_max!(super::I64_MAX, 5),
+ 5,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_6,
+ i64,
+ calc_max!(super::I64_MAX, 6),
+ 6,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_7,
+ i64,
+ calc_max!(super::I64_MAX, 7),
+ 7,
+ read_int,
+ write_int
+ );
+ qc_byte_order!(
+ prop_int_8,
+ i64,
+ calc_max!(super::I64_MAX, 8),
+ 8,
+ read_int,
+ write_int
+ );
+
+ qc_byte_order!(
+ prop_int128_1,
+ Wi128<i128>,
+ 1,
+ 1,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_2,
+ Wi128<i128>,
+ 2,
+ 2,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_3,
+ Wi128<i128>,
+ 3,
+ 3,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_4,
+ Wi128<i128>,
+ 4,
+ 4,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_5,
+ Wi128<i128>,
+ 5,
+ 5,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_6,
+ Wi128<i128>,
+ 6,
+ 6,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_7,
+ Wi128<i128>,
+ 7,
+ 7,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_8,
+ Wi128<i128>,
+ 8,
+ 8,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_9,
+ Wi128<i128>,
+ 9,
+ 9,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_10,
+ Wi128<i128>,
+ 10,
+ 10,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_11,
+ Wi128<i128>,
+ 11,
+ 11,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_12,
+ Wi128<i128>,
+ 12,
+ 12,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_13,
+ Wi128<i128>,
+ 13,
+ 13,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_14,
+ Wi128<i128>,
+ 14,
+ 14,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_15,
+ Wi128<i128>,
+ 15,
+ 15,
+ read_int128,
+ write_int128
+ );
+ qc_byte_order!(
+ prop_int128_16,
+ Wi128<i128>,
+ 16,
+ 16,
+ read_int128,
+ write_int128
+ );
+
+ // Test that all of the byte conversion functions panic when given a
+ // buffer that is too small.
+ //
+ // These tests are critical to ensure safety, otherwise we might end up
+ // with a buffer overflow.
+ macro_rules! too_small {
+ ($name:ident, $maximally_small:expr, $zero:expr,
+ $read:ident, $write:ident) => {
+ mod $name {
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+
+ #[test]
+ #[should_panic]
+ fn read_big_endian() {
+ let buf = [0; $maximally_small];
+ BigEndian::$read(&buf);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_little_endian() {
+ let buf = [0; $maximally_small];
+ LittleEndian::$read(&buf);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_native_endian() {
+ let buf = [0; $maximally_small];
+ NativeEndian::$read(&buf);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_big_endian() {
+ let mut buf = [0; $maximally_small];
+ BigEndian::$write(&mut buf, $zero);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_little_endian() {
+ let mut buf = [0; $maximally_small];
+ LittleEndian::$write(&mut buf, $zero);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_native_endian() {
+ let mut buf = [0; $maximally_small];
+ NativeEndian::$write(&mut buf, $zero);
+ }
+ }
+ };
+ ($name:ident, $maximally_small:expr, $read:ident) => {
+ mod $name {
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+
+ #[test]
+ #[should_panic]
+ fn read_big_endian() {
+ let buf = [0; $maximally_small];
+ BigEndian::$read(&buf, $maximally_small + 1);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_little_endian() {
+ let buf = [0; $maximally_small];
+ LittleEndian::$read(&buf, $maximally_small + 1);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_native_endian() {
+ let buf = [0; $maximally_small];
+ NativeEndian::$read(&buf, $maximally_small + 1);
+ }
+ }
+ };
+ }
+
+ too_small!(small_u16, 1, 0, read_u16, write_u16);
+ too_small!(small_i16, 1, 0, read_i16, write_i16);
+ too_small!(small_u32, 3, 0, read_u32, write_u32);
+ too_small!(small_i32, 3, 0, read_i32, write_i32);
+ too_small!(small_u64, 7, 0, read_u64, write_u64);
+ too_small!(small_i64, 7, 0, read_i64, write_i64);
+ too_small!(small_f32, 3, 0.0, read_f32, write_f32);
+ too_small!(small_f64, 7, 0.0, read_f64, write_f64);
+ too_small!(small_u128, 15, 0, read_u128, write_u128);
+ too_small!(small_i128, 15, 0, read_i128, write_i128);
+
+ too_small!(small_uint_1, 1, read_uint);
+ too_small!(small_uint_2, 2, read_uint);
+ too_small!(small_uint_3, 3, read_uint);
+ too_small!(small_uint_4, 4, read_uint);
+ too_small!(small_uint_5, 5, read_uint);
+ too_small!(small_uint_6, 6, read_uint);
+ too_small!(small_uint_7, 7, read_uint);
+
+ too_small!(small_uint128_1, 1, read_uint128);
+ too_small!(small_uint128_2, 2, read_uint128);
+ too_small!(small_uint128_3, 3, read_uint128);
+ too_small!(small_uint128_4, 4, read_uint128);
+ too_small!(small_uint128_5, 5, read_uint128);
+ too_small!(small_uint128_6, 6, read_uint128);
+ too_small!(small_uint128_7, 7, read_uint128);
+ too_small!(small_uint128_8, 8, read_uint128);
+ too_small!(small_uint128_9, 9, read_uint128);
+ too_small!(small_uint128_10, 10, read_uint128);
+ too_small!(small_uint128_11, 11, read_uint128);
+ too_small!(small_uint128_12, 12, read_uint128);
+ too_small!(small_uint128_13, 13, read_uint128);
+ too_small!(small_uint128_14, 14, read_uint128);
+ too_small!(small_uint128_15, 15, read_uint128);
+
+ too_small!(small_int_1, 1, read_int);
+ too_small!(small_int_2, 2, read_int);
+ too_small!(small_int_3, 3, read_int);
+ too_small!(small_int_4, 4, read_int);
+ too_small!(small_int_5, 5, read_int);
+ too_small!(small_int_6, 6, read_int);
+ too_small!(small_int_7, 7, read_int);
+
+ too_small!(small_int128_1, 1, read_int128);
+ too_small!(small_int128_2, 2, read_int128);
+ too_small!(small_int128_3, 3, read_int128);
+ too_small!(small_int128_4, 4, read_int128);
+ too_small!(small_int128_5, 5, read_int128);
+ too_small!(small_int128_6, 6, read_int128);
+ too_small!(small_int128_7, 7, read_int128);
+ too_small!(small_int128_8, 8, read_int128);
+ too_small!(small_int128_9, 9, read_int128);
+ too_small!(small_int128_10, 10, read_int128);
+ too_small!(small_int128_11, 11, read_int128);
+ too_small!(small_int128_12, 12, read_int128);
+ too_small!(small_int128_13, 13, read_int128);
+ too_small!(small_int128_14, 14, read_int128);
+ too_small!(small_int128_15, 15, read_int128);
+
+ // Test that reading/writing slices enforces the correct lengths.
+ macro_rules! slice_lengths {
+ ($name:ident, $read:ident, $write:ident,
+ $num_bytes:expr, $numbers:expr) => {
+ mod $name {
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+
+ #[test]
+ #[should_panic]
+ fn read_big_endian() {
+ let bytes = [0; $num_bytes];
+ let mut numbers = $numbers;
+ BigEndian::$read(&bytes, &mut numbers);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_little_endian() {
+ let bytes = [0; $num_bytes];
+ let mut numbers = $numbers;
+ LittleEndian::$read(&bytes, &mut numbers);
+ }
+
+ #[test]
+ #[should_panic]
+ fn read_native_endian() {
+ let bytes = [0; $num_bytes];
+ let mut numbers = $numbers;
+ NativeEndian::$read(&bytes, &mut numbers);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_big_endian() {
+ let mut bytes = [0; $num_bytes];
+ let numbers = $numbers;
+ BigEndian::$write(&numbers, &mut bytes);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_little_endian() {
+ let mut bytes = [0; $num_bytes];
+ let numbers = $numbers;
+ LittleEndian::$write(&numbers, &mut bytes);
+ }
+
+ #[test]
+ #[should_panic]
+ fn write_native_endian() {
+ let mut bytes = [0; $num_bytes];
+ let numbers = $numbers;
+ NativeEndian::$write(&numbers, &mut bytes);
+ }
+ }
+ };
+ }
+
+ slice_lengths!(
+ slice_len_too_small_u16,
+ read_u16_into,
+ write_u16_into,
+ 3,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_u16,
+ read_u16_into,
+ write_u16_into,
+ 5,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_small_i16,
+ read_i16_into,
+ write_i16_into,
+ 3,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_i16,
+ read_i16_into,
+ write_i16_into,
+ 5,
+ [0, 0]
+ );
+
+ slice_lengths!(
+ slice_len_too_small_u32,
+ read_u32_into,
+ write_u32_into,
+ 7,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_u32,
+ read_u32_into,
+ write_u32_into,
+ 9,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_small_i32,
+ read_i32_into,
+ write_i32_into,
+ 7,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_i32,
+ read_i32_into,
+ write_i32_into,
+ 9,
+ [0, 0]
+ );
+
+ slice_lengths!(
+ slice_len_too_small_u64,
+ read_u64_into,
+ write_u64_into,
+ 15,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_u64,
+ read_u64_into,
+ write_u64_into,
+ 17,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_small_i64,
+ read_i64_into,
+ write_i64_into,
+ 15,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_i64,
+ read_i64_into,
+ write_i64_into,
+ 17,
+ [0, 0]
+ );
+
+ slice_lengths!(
+ slice_len_too_small_u128,
+ read_u128_into,
+ write_u128_into,
+ 31,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_u128,
+ read_u128_into,
+ write_u128_into,
+ 33,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_small_i128,
+ read_i128_into,
+ write_i128_into,
+ 31,
+ [0, 0]
+ );
+ slice_lengths!(
+ slice_len_too_big_i128,
+ read_i128_into,
+ write_i128_into,
+ 33,
+ [0, 0]
+ );
+
+ #[test]
+ fn uint_bigger_buffer() {
+ use crate::{ByteOrder, LittleEndian};
+ let n = LittleEndian::read_uint(&[1, 2, 3, 4, 5, 6, 7, 8], 5);
+ assert_eq!(n, 0x05_0403_0201);
+ }
+
+ #[test]
+ fn regression173_array_impl() {
+ use crate::{BigEndian, ByteOrder, LittleEndian};
+
+ let xs = [0; 100];
+
+ let x = BigEndian::read_u16(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_u32(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_u64(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_u128(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_i16(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_i32(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_i64(&xs);
+ assert_eq!(x, 0);
+ let x = BigEndian::read_i128(&xs);
+ assert_eq!(x, 0);
+
+ let x = LittleEndian::read_u16(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_u32(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_u64(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_u128(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_i16(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_i32(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_i64(&xs);
+ assert_eq!(x, 0);
+ let x = LittleEndian::read_i128(&xs);
+ assert_eq!(x, 0);
+ }
+}
+
+#[cfg(test)]
+#[cfg(feature = "std")]
+mod stdtests {
+ extern crate quickcheck;
+ extern crate rand;
+
+ use self::quickcheck::{QuickCheck, StdGen, Testable};
+ use self::rand::thread_rng;
+
+ fn qc_unsized<A: Testable>(f: A) {
+ QuickCheck::new()
+ .gen(StdGen::new(thread_rng(), 16))
+ .tests(1_00)
+ .max_tests(10_000)
+ .quickcheck(f);
+ }
+
+ macro_rules! calc_max {
+ ($max:expr, $bytes:expr) => {
+ ($max - 1) >> (8 * (8 - $bytes))
+ };
+ }
+
+ macro_rules! qc_bytes_ext {
+ ($name:ident, $ty_int:ty, $max:expr,
+ $bytes:expr, $read:ident, $write:ident) => {
+ mod $name {
+ #[allow(unused_imports)]
+ use crate::test::{qc_sized, Wi128};
+ use crate::{
+ BigEndian, LittleEndian, NativeEndian, ReadBytesExt,
+ WriteBytesExt,
+ };
+ use std::io::Cursor;
+
+ #[test]
+ fn big_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<BigEndian>(n.clone()).unwrap();
+ let offset = wtr.len() - $bytes;
+ let mut rdr = Cursor::new(&mut wtr[offset..]);
+ n == rdr.$read::<BigEndian>($bytes).unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+
+ #[test]
+ fn little_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<LittleEndian>(n.clone()).unwrap();
+ let mut rdr = Cursor::new(wtr);
+ n == rdr.$read::<LittleEndian>($bytes).unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+
+ #[test]
+ fn native_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<NativeEndian>(n.clone()).unwrap();
+ let offset = if cfg!(target_endian = "big") {
+ wtr.len() - $bytes
+ } else {
+ 0
+ };
+ let mut rdr = Cursor::new(&mut wtr[offset..]);
+ n == rdr.$read::<NativeEndian>($bytes).unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max);
+ }
+ }
+ };
+ ($name:ident, $ty_int:ty, $max:expr, $read:ident, $write:ident) => {
+ mod $name {
+ #[allow(unused_imports)]
+ use crate::test::{qc_sized, Wi128};
+ use crate::{
+ BigEndian, LittleEndian, NativeEndian, ReadBytesExt,
+ WriteBytesExt,
+ };
+ use std::io::Cursor;
+
+ #[test]
+ fn big_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<BigEndian>(n.clone()).unwrap();
+ let mut rdr = Cursor::new(wtr);
+ n == rdr.$read::<BigEndian>().unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+
+ #[test]
+ fn little_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<LittleEndian>(n.clone()).unwrap();
+ let mut rdr = Cursor::new(wtr);
+ n == rdr.$read::<LittleEndian>().unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+
+ #[test]
+ fn native_endian() {
+ fn prop(n: $ty_int) -> bool {
+ let mut wtr = vec![];
+ wtr.$write::<NativeEndian>(n.clone()).unwrap();
+ let mut rdr = Cursor::new(wtr);
+ n == rdr.$read::<NativeEndian>().unwrap()
+ }
+ qc_sized(prop as fn($ty_int) -> bool, $max - 1);
+ }
+ }
+ };
+ }
+
+ qc_bytes_ext!(
+ prop_ext_u16,
+ u16,
+ ::std::u16::MAX as u64,
+ read_u16,
+ write_u16
+ );
+ qc_bytes_ext!(
+ prop_ext_i16,
+ i16,
+ ::std::i16::MAX as u64,
+ read_i16,
+ write_i16
+ );
+ qc_bytes_ext!(
+ prop_ext_u32,
+ u32,
+ ::std::u32::MAX as u64,
+ read_u32,
+ write_u32
+ );
+ qc_bytes_ext!(
+ prop_ext_i32,
+ i32,
+ ::std::i32::MAX as u64,
+ read_i32,
+ write_i32
+ );
+ qc_bytes_ext!(
+ prop_ext_u64,
+ u64,
+ ::std::u64::MAX as u64,
+ read_u64,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_i64,
+ i64,
+ ::std::i64::MAX as u64,
+ read_i64,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_f32,
+ f32,
+ ::std::u64::MAX as u64,
+ read_f32,
+ write_f32
+ );
+ qc_bytes_ext!(
+ prop_ext_f64,
+ f64,
+ ::std::i64::MAX as u64,
+ read_f64,
+ write_f64
+ );
+
+ qc_bytes_ext!(prop_ext_u128, Wi128<u128>, 16 + 1, read_u128, write_u128);
+ qc_bytes_ext!(prop_ext_i128, Wi128<i128>, 16 + 1, read_i128, write_i128);
+
+ qc_bytes_ext!(
+ prop_ext_uint_1,
+ u64,
+ calc_max!(crate::test::U64_MAX, 1),
+ 1,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_2,
+ u64,
+ calc_max!(crate::test::U64_MAX, 2),
+ 2,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_3,
+ u64,
+ calc_max!(crate::test::U64_MAX, 3),
+ 3,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_4,
+ u64,
+ calc_max!(crate::test::U64_MAX, 4),
+ 4,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_5,
+ u64,
+ calc_max!(crate::test::U64_MAX, 5),
+ 5,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_6,
+ u64,
+ calc_max!(crate::test::U64_MAX, 6),
+ 6,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_7,
+ u64,
+ calc_max!(crate::test::U64_MAX, 7),
+ 7,
+ read_uint,
+ write_u64
+ );
+ qc_bytes_ext!(
+ prop_ext_uint_8,
+ u64,
+ calc_max!(crate::test::U64_MAX, 8),
+ 8,
+ read_uint,
+ write_u64
+ );
+
+ qc_bytes_ext!(
+ prop_ext_uint128_1,
+ Wi128<u128>,
+ 1,
+ 1,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_2,
+ Wi128<u128>,
+ 2,
+ 2,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_3,
+ Wi128<u128>,
+ 3,
+ 3,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_4,
+ Wi128<u128>,
+ 4,
+ 4,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_5,
+ Wi128<u128>,
+ 5,
+ 5,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_6,
+ Wi128<u128>,
+ 6,
+ 6,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_7,
+ Wi128<u128>,
+ 7,
+ 7,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_8,
+ Wi128<u128>,
+ 8,
+ 8,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_9,
+ Wi128<u128>,
+ 9,
+ 9,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_10,
+ Wi128<u128>,
+ 10,
+ 10,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_11,
+ Wi128<u128>,
+ 11,
+ 11,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_12,
+ Wi128<u128>,
+ 12,
+ 12,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_13,
+ Wi128<u128>,
+ 13,
+ 13,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_14,
+ Wi128<u128>,
+ 14,
+ 14,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_15,
+ Wi128<u128>,
+ 15,
+ 15,
+ read_uint128,
+ write_u128
+ );
+ qc_bytes_ext!(
+ prop_ext_uint128_16,
+ Wi128<u128>,
+ 16,
+ 16,
+ read_uint128,
+ write_u128
+ );
+
+ qc_bytes_ext!(
+ prop_ext_int_1,
+ i64,
+ calc_max!(crate::test::I64_MAX, 1),
+ 1,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_2,
+ i64,
+ calc_max!(crate::test::I64_MAX, 2),
+ 2,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_3,
+ i64,
+ calc_max!(crate::test::I64_MAX, 3),
+ 3,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_4,
+ i64,
+ calc_max!(crate::test::I64_MAX, 4),
+ 4,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_5,
+ i64,
+ calc_max!(crate::test::I64_MAX, 5),
+ 5,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_6,
+ i64,
+ calc_max!(crate::test::I64_MAX, 6),
+ 6,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_7,
+ i64,
+ calc_max!(crate::test::I64_MAX, 1),
+ 7,
+ read_int,
+ write_i64
+ );
+ qc_bytes_ext!(
+ prop_ext_int_8,
+ i64,
+ calc_max!(crate::test::I64_MAX, 8),
+ 8,
+ read_int,
+ write_i64
+ );
+
+ qc_bytes_ext!(
+ prop_ext_int128_1,
+ Wi128<i128>,
+ 1,
+ 1,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_2,
+ Wi128<i128>,
+ 2,
+ 2,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_3,
+ Wi128<i128>,
+ 3,
+ 3,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_4,
+ Wi128<i128>,
+ 4,
+ 4,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_5,
+ Wi128<i128>,
+ 5,
+ 5,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_6,
+ Wi128<i128>,
+ 6,
+ 6,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_7,
+ Wi128<i128>,
+ 7,
+ 7,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_8,
+ Wi128<i128>,
+ 8,
+ 8,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_9,
+ Wi128<i128>,
+ 9,
+ 9,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_10,
+ Wi128<i128>,
+ 10,
+ 10,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_11,
+ Wi128<i128>,
+ 11,
+ 11,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_12,
+ Wi128<i128>,
+ 12,
+ 12,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_13,
+ Wi128<i128>,
+ 13,
+ 13,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_14,
+ Wi128<i128>,
+ 14,
+ 14,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_15,
+ Wi128<i128>,
+ 15,
+ 15,
+ read_int128,
+ write_i128
+ );
+ qc_bytes_ext!(
+ prop_ext_int128_16,
+ Wi128<i128>,
+ 16,
+ 16,
+ read_int128,
+ write_i128
+ );
+
+ // Test slice serialization/deserialization.
+ macro_rules! qc_slice {
+ ($name:ident, $ty_int:ty, $read:ident, $write:ident, $zero:expr) => {
+ mod $name {
+ use super::qc_unsized;
+ #[allow(unused_imports)]
+ use crate::test::Wi128;
+ use crate::{
+ BigEndian, ByteOrder, LittleEndian, NativeEndian,
+ };
+ use core::mem::size_of;
+
+ #[test]
+ fn big_endian() {
+ #[allow(unused_unsafe)]
+ fn prop(numbers: Vec<$ty_int>) -> bool {
+ let numbers: Vec<_> =
+ numbers.into_iter().map(|x| x.clone()).collect();
+ let num_bytes = size_of::<$ty_int>() * numbers.len();
+ let mut bytes = vec![0; num_bytes];
+
+ BigEndian::$write(&numbers, &mut bytes);
+
+ let mut got = vec![$zero; numbers.len()];
+ unsafe {
+ BigEndian::$read(&bytes, &mut got);
+ }
+
+ numbers == got
+ }
+ qc_unsized(prop as fn(_) -> bool);
+ }
+
+ #[test]
+ fn little_endian() {
+ #[allow(unused_unsafe)]
+ fn prop(numbers: Vec<$ty_int>) -> bool {
+ let numbers: Vec<_> =
+ numbers.into_iter().map(|x| x.clone()).collect();
+ let num_bytes = size_of::<$ty_int>() * numbers.len();
+ let mut bytes = vec![0; num_bytes];
+
+ LittleEndian::$write(&numbers, &mut bytes);
+
+ let mut got = vec![$zero; numbers.len()];
+ unsafe {
+ LittleEndian::$read(&bytes, &mut got);
+ }
+
+ numbers == got
+ }
+ qc_unsized(prop as fn(_) -> bool);
+ }
+
+ #[test]
+ fn native_endian() {
+ #[allow(unused_unsafe)]
+ fn prop(numbers: Vec<$ty_int>) -> bool {
+ let numbers: Vec<_> =
+ numbers.into_iter().map(|x| x.clone()).collect();
+ let num_bytes = size_of::<$ty_int>() * numbers.len();
+ let mut bytes = vec![0; num_bytes];
+
+ NativeEndian::$write(&numbers, &mut bytes);
+
+ let mut got = vec![$zero; numbers.len()];
+ unsafe {
+ NativeEndian::$read(&bytes, &mut got);
+ }
+
+ numbers == got
+ }
+ qc_unsized(prop as fn(_) -> bool);
+ }
+ }
+ };
+ }
+
+ qc_slice!(prop_slice_u16, u16, read_u16_into, write_u16_into, 0);
+ qc_slice!(prop_slice_i16, i16, read_i16_into, write_i16_into, 0);
+ qc_slice!(prop_slice_u32, u32, read_u32_into, write_u32_into, 0);
+ qc_slice!(prop_slice_i32, i32, read_i32_into, write_i32_into, 0);
+ qc_slice!(prop_slice_u64, u64, read_u64_into, write_u64_into, 0);
+ qc_slice!(prop_slice_i64, i64, read_i64_into, write_i64_into, 0);
+ qc_slice!(
+ prop_slice_u128,
+ Wi128<u128>,
+ read_u128_into,
+ write_u128_into,
+ 0
+ );
+ qc_slice!(
+ prop_slice_i128,
+ Wi128<i128>,
+ read_i128_into,
+ write_i128_into,
+ 0
+ );
+
+ qc_slice!(prop_slice_f32, f32, read_f32_into, write_f32_into, 0.0);
+ qc_slice!(prop_slice_f64, f64, read_f64_into, write_f64_into, 0.0);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 14:57:50 +0000