Struct FieldMut 

pub struct FieldMut<'a> { /* private fields */ }

Mutable typed view over a field’s bytes.

Implementations

impl<'a> FieldMut<'a>

pub fn new(data: &'a mut [u8]) -> Self

Create a mutable field reference over the given byte slice.

pub fn read_u8(&self) -> Result<u8, ProgramError>

Read a u8 from offset 0.

pub fn read_u64(&self) -> Result<u64, ProgramError>

Read a little-endian u64 from offset 0.

pub fn write_u8(&mut self, v: u8) -> Result<(), ProgramError>

Write a u8 at offset 0.

pub fn write_u16(&mut self, v: u16) -> Result<(), ProgramError>

Write a little-endian u16 at offset 0.

pub fn write_u32(&mut self, v: u32) -> Result<(), ProgramError>

Write a little-endian u32 at offset 0.

pub fn write_u64(&mut self, v: u64) -> Result<(), ProgramError>

Write a little-endian u64 at offset 0.

pub fn write_bool(&mut self, v: bool) -> Result<(), ProgramError>

Write a boolean (normalized to 0x00 or 0x01).

pub fn write_address(&mut self, addr: &[u8; 32]) -> Result<(), ProgramError>

Write a 32-byte address.

pub fn copy_from(&mut self, src: &[u8]) -> Result<(), ProgramError>

Copy raw bytes into this field.

pub fn as_bytes(&self) -> &[u8]

Borrow the underlying bytes immutably.

pub fn as_bytes_mut(&mut self) -> &mut [u8]

Borrow the underlying bytes mutably.