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+//! Types for compile-time and run-time endianness.
+
+use crate::pod::Pod;
+use core::fmt::{self, Debug};
+use core::marker::PhantomData;
+
+/// A trait for using an endianness specification.
+///
+/// Provides methods for converting between the specified endianness and
+/// the native endianness of the target machine.
+///
+/// This trait does not require that the endianness is known at compile time.
+pub trait Endian: Debug + Default + Clone + Copy + PartialEq + Eq + 'static {
+ /// Construct a specification for the endianness of some values.
+ ///
+ /// Returns `None` if the type does not support specifying the given endianness.
+ fn from_big_endian(big_endian: bool) -> Option<Self>;
+
+ /// Construct a specification for the endianness of some values.
+ ///
+ /// Returns `None` if the type does not support specifying the given endianness.
+ fn from_little_endian(little_endian: bool) -> Option<Self> {
+ Self::from_big_endian(!little_endian)
+ }
+
+ /// Return true for big endian byte order.
+ fn is_big_endian(self) -> bool;
+
+ /// Return true for little endian byte order.
+ #[inline]
+ fn is_little_endian(self) -> bool {
+ !self.is_big_endian()
+ }
+
+ /// Converts an unsigned 16 bit integer to native endian.
+ #[inline]
+ fn read_u16(self, n: u16) -> u16 {
+ if self.is_big_endian() {
+ u16::from_be(n)
+ } else {
+ u16::from_le(n)
+ }
+ }
+
+ /// Converts an unsigned 32 bit integer to native endian.
+ #[inline]
+ fn read_u32(self, n: u32) -> u32 {
+ if self.is_big_endian() {
+ u32::from_be(n)
+ } else {
+ u32::from_le(n)
+ }
+ }
+
+ /// Converts an unsigned 64 bit integer to native endian.
+ #[inline]
+ fn read_u64(self, n: u64) -> u64 {
+ if self.is_big_endian() {
+ u64::from_be(n)
+ } else {
+ u64::from_le(n)
+ }
+ }
+
+ /// Converts a signed 16 bit integer to native endian.
+ #[inline]
+ fn read_i16(self, n: i16) -> i16 {
+ if self.is_big_endian() {
+ i16::from_be(n)
+ } else {
+ i16::from_le(n)
+ }
+ }
+
+ /// Converts a signed 32 bit integer to native endian.
+ #[inline]
+ fn read_i32(self, n: i32) -> i32 {
+ if self.is_big_endian() {
+ i32::from_be(n)
+ } else {
+ i32::from_le(n)
+ }
+ }
+
+ /// Converts a signed 64 bit integer to native endian.
+ #[inline]
+ fn read_i64(self, n: i64) -> i64 {
+ if self.is_big_endian() {
+ i64::from_be(n)
+ } else {
+ i64::from_le(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 16 bit integer to native endian.
+ #[inline]
+ fn read_u16_bytes(self, n: [u8; 2]) -> u16 {
+ if self.is_big_endian() {
+ u16::from_be_bytes(n)
+ } else {
+ u16::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 32 bit integer to native endian.
+ #[inline]
+ fn read_u32_bytes(self, n: [u8; 4]) -> u32 {
+ if self.is_big_endian() {
+ u32::from_be_bytes(n)
+ } else {
+ u32::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 64 bit integer to native endian.
+ #[inline]
+ fn read_u64_bytes(self, n: [u8; 8]) -> u64 {
+ if self.is_big_endian() {
+ u64::from_be_bytes(n)
+ } else {
+ u64::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 16 bit integer to native endian.
+ #[inline]
+ fn read_i16_bytes(self, n: [u8; 2]) -> i16 {
+ if self.is_big_endian() {
+ i16::from_be_bytes(n)
+ } else {
+ i16::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 32 bit integer to native endian.
+ #[inline]
+ fn read_i32_bytes(self, n: [u8; 4]) -> i32 {
+ if self.is_big_endian() {
+ i32::from_be_bytes(n)
+ } else {
+ i32::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 64 bit integer to native endian.
+ #[inline]
+ fn read_i64_bytes(self, n: [u8; 8]) -> i64 {
+ if self.is_big_endian() {
+ i64::from_be_bytes(n)
+ } else {
+ i64::from_le_bytes(n)
+ }
+ }
+
+ /// Converts an unsigned 16 bit integer from native endian.
+ #[inline]
+ fn write_u16(self, n: u16) -> u16 {
+ if self.is_big_endian() {
+ u16::to_be(n)
+ } else {
+ u16::to_le(n)
+ }
+ }
+
+ /// Converts an unsigned 32 bit integer from native endian.
+ #[inline]
+ fn write_u32(self, n: u32) -> u32 {
+ if self.is_big_endian() {
+ u32::to_be(n)
+ } else {
+ u32::to_le(n)
+ }
+ }
+
+ /// Converts an unsigned 64 bit integer from native endian.
+ #[inline]
+ fn write_u64(self, n: u64) -> u64 {
+ if self.is_big_endian() {
+ u64::to_be(n)
+ } else {
+ u64::to_le(n)
+ }
+ }
+
+ /// Converts a signed 16 bit integer from native endian.
+ #[inline]
+ fn write_i16(self, n: i16) -> i16 {
+ if self.is_big_endian() {
+ i16::to_be(n)
+ } else {
+ i16::to_le(n)
+ }
+ }
+
+ /// Converts a signed 32 bit integer from native endian.
+ #[inline]
+ fn write_i32(self, n: i32) -> i32 {
+ if self.is_big_endian() {
+ i32::to_be(n)
+ } else {
+ i32::to_le(n)
+ }
+ }
+
+ /// Converts a signed 64 bit integer from native endian.
+ #[inline]
+ fn write_i64(self, n: i64) -> i64 {
+ if self.is_big_endian() {
+ i64::to_be(n)
+ } else {
+ i64::to_le(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 16 bit integer from native endian.
+ #[inline]
+ fn write_u16_bytes(self, n: u16) -> [u8; 2] {
+ if self.is_big_endian() {
+ u16::to_be_bytes(n)
+ } else {
+ u16::to_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 32 bit integer from native endian.
+ #[inline]
+ fn write_u32_bytes(self, n: u32) -> [u8; 4] {
+ if self.is_big_endian() {
+ u32::to_be_bytes(n)
+ } else {
+ u32::to_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned unsigned 64 bit integer from native endian.
+ #[inline]
+ fn write_u64_bytes(self, n: u64) -> [u8; 8] {
+ if self.is_big_endian() {
+ u64::to_be_bytes(n)
+ } else {
+ u64::to_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 16 bit integer from native endian.
+ #[inline]
+ fn write_i16_bytes(self, n: i16) -> [u8; 2] {
+ if self.is_big_endian() {
+ i16::to_be_bytes(n)
+ } else {
+ i16::to_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 32 bit integer from native endian.
+ #[inline]
+ fn write_i32_bytes(self, n: i32) -> [u8; 4] {
+ if self.is_big_endian() {
+ i32::to_be_bytes(n)
+ } else {
+ i32::to_le_bytes(n)
+ }
+ }
+
+ /// Converts an unaligned signed 64 bit integer from native endian.
+ #[inline]
+ fn write_i64_bytes(self, n: i64) -> [u8; 8] {
+ if self.is_big_endian() {
+ i64::to_be_bytes(n)
+ } else {
+ i64::to_le_bytes(n)
+ }
+ }
+}
+
+/// An endianness that is selectable at run-time.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum Endianness {
+ /// Little endian byte order.
+ Little,
+ /// Big endian byte order.
+ Big,
+}
+
+impl Default for Endianness {
+ #[cfg(target_endian = "little")]
+ #[inline]
+ fn default() -> Endianness {
+ Endianness::Little
+ }
+
+ #[cfg(target_endian = "big")]
+ #[inline]
+ fn default() -> Endianness {
+ Endianness::Big
+ }
+}
+
+impl Endian for Endianness {
+ #[inline]
+ fn from_big_endian(big_endian: bool) -> Option<Self> {
+ Some(if big_endian {
+ Endianness::Big
+ } else {
+ Endianness::Little
+ })
+ }
+
+ #[inline]
+ fn is_big_endian(self) -> bool {
+ self != Endianness::Little
+ }
+}
+
+/// Compile-time little endian byte order.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct LittleEndian;
+
+impl Default for LittleEndian {
+ #[inline]
+ fn default() -> LittleEndian {
+ LittleEndian
+ }
+}
+
+impl Endian for LittleEndian {
+ #[inline]
+ fn from_big_endian(big_endian: bool) -> Option<Self> {
+ if big_endian {
+ None
+ } else {
+ Some(LittleEndian)
+ }
+ }
+
+ #[inline]
+ fn is_big_endian(self) -> bool {
+ false
+ }
+}
+
+/// Compile-time big endian byte order.
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct BigEndian;
+
+impl Default for BigEndian {
+ #[inline]
+ fn default() -> BigEndian {
+ BigEndian
+ }
+}
+
+impl Endian for BigEndian {
+ #[inline]
+ fn from_big_endian(big_endian: bool) -> Option<Self> {
+ if big_endian {
+ Some(BigEndian)
+ } else {
+ None
+ }
+ }
+
+ #[inline]
+ fn is_big_endian(self) -> bool {
+ true
+ }
+}
+
+/// The native endianness for the target platform.
+#[cfg(target_endian = "little")]
+pub type NativeEndian = LittleEndian;
+
+#[cfg(target_endian = "little")]
+#[allow(non_upper_case_globals)]
+#[doc(hidden)]
+pub const NativeEndian: LittleEndian = LittleEndian;
+
+/// The native endianness for the target platform.
+#[cfg(target_endian = "big")]
+pub type NativeEndian = BigEndian;
+
+#[cfg(target_endian = "big")]
+#[allow(non_upper_case_globals)]
+#[doc(hidden)]
+pub const NativeEndian: BigEndian = BigEndian;
+
+macro_rules! unsafe_impl_endian_pod {
+ ($($struct_name:ident),+ $(,)?) => {
+ $(
+ unsafe impl<E: Endian> Pod for $struct_name<E> { }
+ )+
+ }
+}
+
+#[cfg(not(feature = "unaligned"))]
+mod aligned {
+ use super::{fmt, Endian, PhantomData, Pod};
+
+ /// A `u16` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct U16<E: Endian>(u16, PhantomData<E>);
+
+ impl<E: Endian> U16<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 2]) -> Self {
+ Self(u16::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u16) -> Self {
+ Self(e.write_u16(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u16 {
+ e.read_u16(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u16) {
+ self.0 = e.write_u16(n);
+ }
+ }
+
+ /// A `u32` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct U32<E: Endian>(u32, PhantomData<E>);
+
+ impl<E: Endian> U32<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 4]) -> Self {
+ Self(u32::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u32) -> Self {
+ Self(e.write_u32(n), PhantomData)
+ }
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u32 {
+ e.read_u32(self.0)
+ }
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u32) {
+ self.0 = e.write_u32(n);
+ }
+ }
+
+ /// A `u64` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct U64<E: Endian>(u64, PhantomData<E>);
+
+ impl<E: Endian> U64<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 8]) -> Self {
+ Self(u64::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u64) -> Self {
+ Self(e.write_u64(n), PhantomData)
+ }
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u64 {
+ e.read_u64(self.0)
+ }
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u64) {
+ self.0 = e.write_u64(n);
+ }
+ }
+
+ /// An `i16` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct I16<E: Endian>(i16, PhantomData<E>);
+
+ impl<E: Endian> I16<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 2]) -> Self {
+ Self(i16::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i16) -> Self {
+ Self(e.write_i16(n), PhantomData)
+ }
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i16 {
+ e.read_i16(self.0)
+ }
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i16) {
+ self.0 = e.write_i16(n);
+ }
+ }
+
+ /// An `i32` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct I32<E: Endian>(i32, PhantomData<E>);
+
+ impl<E: Endian> I32<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 4]) -> Self {
+ Self(i32::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i32) -> Self {
+ Self(e.write_i32(n), PhantomData)
+ }
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i32 {
+ e.read_i32(self.0)
+ }
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i32) {
+ self.0 = e.write_i32(n);
+ }
+ }
+
+ /// An `i64` value with an externally specified endianness of type `E`.
+ #[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+ #[repr(transparent)]
+ pub struct I64<E: Endian>(i64, PhantomData<E>);
+
+ impl<E: Endian> I64<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 8]) -> Self {
+ Self(i64::from_ne_bytes(n), PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i64) -> Self {
+ Self(e.write_i64(n), PhantomData)
+ }
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i64 {
+ e.read_i64(self.0)
+ }
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i64) {
+ self.0 = e.write_i64(n);
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for U16<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "U16({:x})", self.0)
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for U32<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "U32({:x})", self.0)
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for U64<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "U64({:x})", self.0)
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for I16<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "I16({:x})", self.0)
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for I32<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "I32({:x})", self.0)
+ }
+ }
+
+ impl<E: Endian> fmt::Debug for I64<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "I64({:x})", self.0)
+ }
+ }
+
+ unsafe_impl_endian_pod!(U16, U32, U64, I16, I32, I64);
+}
+
+#[cfg(not(feature = "unaligned"))]
+pub use aligned::*;
+
+/// A `u16` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U16<E> = U16Bytes<E>;
+
+/// A `u32` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U32<E> = U32Bytes<E>;
+
+/// A `u64` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type U64<E> = U64Bytes<E>;
+
+/// An `i16` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I16<E> = I16Bytes<E>;
+
+/// An `i32` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I32<E> = I32Bytes<E>;
+
+/// An `i64` value with an externally specified endianness of type `E`.
+#[cfg(feature = "unaligned")]
+pub type I64<E> = I64Bytes<E>;
+
+/// An unaligned `u16` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U16Bytes<E: Endian>([u8; 2], PhantomData<E>);
+
+impl<E: Endian> U16Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 2]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u16) -> Self {
+ Self(e.write_u16_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u16 {
+ e.read_u16_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u16) {
+ self.0 = e.write_u16_bytes(n);
+ }
+}
+
+/// An unaligned `u32` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U32Bytes<E: Endian>([u8; 4], PhantomData<E>);
+
+impl<E: Endian> U32Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 4]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u32) -> Self {
+ Self(e.write_u32_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u32 {
+ e.read_u32_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u32) {
+ self.0 = e.write_u32_bytes(n);
+ }
+}
+
+/// An unaligned `u64` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct U64Bytes<E: Endian>([u8; 8], PhantomData<E>);
+
+impl<E: Endian> U64Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 8]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: u64) -> Self {
+ Self(e.write_u64_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> u64 {
+ e.read_u64_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: u64) {
+ self.0 = e.write_u64_bytes(n);
+ }
+}
+
+/// An unaligned `i16` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I16Bytes<E: Endian>([u8; 2], PhantomData<E>);
+
+impl<E: Endian> I16Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 2]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i16) -> Self {
+ Self(e.write_i16_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i16 {
+ e.read_i16_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i16) {
+ self.0 = e.write_i16_bytes(n);
+ }
+}
+
+/// An unaligned `i32` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I32Bytes<E: Endian>([u8; 4], PhantomData<E>);
+
+impl<E: Endian> I32Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 4]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i32) -> Self {
+ Self(e.write_i32_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i32 {
+ e.read_i32_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i32) {
+ self.0 = e.write_i32_bytes(n);
+ }
+}
+
+/// An unaligned `i64` value with an externally specified endianness of type `E`.
+#[derive(Default, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[repr(transparent)]
+pub struct I64Bytes<E: Endian>([u8; 8], PhantomData<E>);
+
+impl<E: Endian> I64Bytes<E> {
+ /// Construct a new value given bytes that already have the required endianness.
+ pub fn from_bytes(n: [u8; 8]) -> Self {
+ Self(n, PhantomData)
+ }
+
+ /// Construct a new value given a native endian value.
+ pub fn new(e: E, n: i64) -> Self {
+ Self(e.write_i64_bytes(n), PhantomData)
+ }
+
+ /// Return the value as a native endian value.
+ pub fn get(self, e: E) -> i64 {
+ e.read_i64_bytes(self.0)
+ }
+
+ /// Set the value given a native endian value.
+ pub fn set(&mut self, e: E, n: i64) {
+ self.0 = e.write_i64_bytes(n);
+ }
+}
+
+impl<E: Endian> fmt::Debug for U16Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "U16({:x}, {:x})", self.0[0], self.0[1],)
+ }
+}
+
+impl<E: Endian> fmt::Debug for U32Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(
+ f,
+ "U32({:x}, {:x}, {:x}, {:x})",
+ self.0[0], self.0[1], self.0[2], self.0[3],
+ )
+ }
+}
+
+impl<E: Endian> fmt::Debug for U64Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(
+ f,
+ "U64({:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x})",
+ self.0[0], self.0[1], self.0[2], self.0[3], self.0[4], self.0[5], self.0[6], self.0[7],
+ )
+ }
+}
+
+impl<E: Endian> fmt::Debug for I16Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(f, "I16({:x}, {:x})", self.0[0], self.0[1],)
+ }
+}
+
+impl<E: Endian> fmt::Debug for I32Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(
+ f,
+ "I32({:x}, {:x}, {:x}, {:x})",
+ self.0[0], self.0[1], self.0[2], self.0[3],
+ )
+ }
+}
+
+impl<E: Endian> fmt::Debug for I64Bytes<E> {
+ fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+ write!(
+ f,
+ "I64({:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x}, {:x})",
+ self.0[0], self.0[1], self.0[2], self.0[3], self.0[4], self.0[5], self.0[6], self.0[7],
+ )
+ }
+}
+
+unsafe_impl_endian_pod!(U16Bytes, U32Bytes, U64Bytes, I16Bytes, I32Bytes, I64Bytes);
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