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//! Unaligned write operations for pointer types.
/// Trait providing convenient unaligned write operations for mutable pointer types.
pub trait UnalignedWrite {
// Unsigned integer types
/// Writes a [`u8`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 1 byte
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
unsafe fn write_u8_at(self, byte_offset: usize, value: u8);
/// Writes a [`u16`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 2 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_u16_at(self, byte_offset: usize, value: u16);
/// Writes a [`u32`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 4 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_u32_at(self, byte_offset: usize, value: u32);
/// Writes a [`u64`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 8 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_u64_at(self, byte_offset: usize, value: u64);
/// Writes a [`u128`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 16 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_u128_at(self, byte_offset: usize, value: u128);
/// Writes a [`usize`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing [`size_of::<usize>()`] bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_usize_at(self, byte_offset: usize, value: usize);
// Signed integer types
/// Writes an [`i8`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 1 byte
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
unsafe fn write_i8_at(self, byte_offset: usize, value: i8);
/// Writes an [`i16`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 2 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_i16_at(self, byte_offset: usize, value: i16);
/// Writes an [`i32`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 4 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_i32_at(self, byte_offset: usize, value: i32);
/// Writes an [`i64`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 8 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_i64_at(self, byte_offset: usize, value: i64);
/// Writes an [`i128`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 16 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_i128_at(self, byte_offset: usize, value: i128);
/// Writes an [`isize`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing [`size_of::<isize>()`] bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_isize_at(self, byte_offset: usize, value: isize);
// Floating point types
/// Writes an [`f32`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 4 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_f32_at(self, byte_offset: usize, value: f32);
/// Writes an [`f64`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 8 bytes
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
/// - No alignment requirements - this performs unaligned writes
unsafe fn write_f64_at(self, byte_offset: usize, value: f64);
// Boolean type
/// Writes a [`bool`] value to the pointer at the given byte offset.
///
/// # Safety
/// - The pointer plus byte offset must be valid for writing 1 byte
/// - The caller must ensure the pointer remains valid for the duration of the write
/// - The memory location must be mutable
unsafe fn write_bool_at(self, byte_offset: usize, value: bool);
}
impl<T> UnalignedWrite for *mut T {
#[inline(always)]
unsafe fn write_u8_at(self, byte_offset: usize, value: u8) {
(self as *mut u8).add(byte_offset).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_u16_at(self, byte_offset: usize, value: u16) {
((self as *mut u8).add(byte_offset) as *mut u16).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_u32_at(self, byte_offset: usize, value: u32) {
((self as *mut u8).add(byte_offset) as *mut u32).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_u64_at(self, byte_offset: usize, value: u64) {
((self as *mut u8).add(byte_offset) as *mut u64).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_u128_at(self, byte_offset: usize, value: u128) {
((self as *mut u8).add(byte_offset) as *mut u128).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_usize_at(self, byte_offset: usize, value: usize) {
((self as *mut u8).add(byte_offset) as *mut usize).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_i8_at(self, byte_offset: usize, value: i8) {
((self as *mut u8).add(byte_offset) as *mut i8).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_i16_at(self, byte_offset: usize, value: i16) {
((self as *mut u8).add(byte_offset) as *mut i16).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_i32_at(self, byte_offset: usize, value: i32) {
((self as *mut u8).add(byte_offset) as *mut i32).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_i64_at(self, byte_offset: usize, value: i64) {
((self as *mut u8).add(byte_offset) as *mut i64).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_i128_at(self, byte_offset: usize, value: i128) {
((self as *mut u8).add(byte_offset) as *mut i128).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_isize_at(self, byte_offset: usize, value: isize) {
((self as *mut u8).add(byte_offset) as *mut isize).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_f32_at(self, byte_offset: usize, value: f32) {
((self as *mut u8).add(byte_offset) as *mut f32).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_f64_at(self, byte_offset: usize, value: f64) {
((self as *mut u8).add(byte_offset) as *mut f64).write_unaligned(value);
}
#[inline(always)]
unsafe fn write_bool_at(self, byte_offset: usize, value: bool) {
((self as *mut u8).add(byte_offset) as *mut bool).write_unaligned(value);
}
}