Struct Field 

pub struct Field<T> {
    pub value: T,
    pub offset: usize,
    pub size: usize,
}

A parsed value together with its absolute offset and on-disk width in the file buffer.

Fields

value: T

Decoded value (may be promoted, e.g. u32 stored as u64).

offset: usize

Absolute byte offset from the start of the file buffer.

size: usize

Width of this field in the on-disk representation, in bytes.

Implementations

impl<T> Field<T>

pub fn new(value: T, offset: usize, size: usize) -> Self

Constructs a field descriptor without reading from a buffer.

impl Field<u64>

pub fn update( &mut self, buffer: &mut [u8], new_value: u64, ) -> Result<(), FileParseError>

Updates the buffer at the specified offset with the new value for u64.

pub fn update_with( &mut self, buffer: &mut [u8], new_value: u64, order: ByteOrder, ) -> Result<(), FileParseError>

Updates the buffer using the specified byte order.

impl Field<u32>

pub fn update( &mut self, buffer: &mut [u8], new_value: u32, ) -> Result<(), FileParseError>

Updates the buffer at the specified offset with the new value for u32.

pub fn update_with( &mut self, buffer: &mut [u8], new_value: u32, order: ByteOrder, ) -> Result<(), FileParseError>

Updates the buffer using the specified byte order.

impl Field<u8>

pub fn update( &mut self, buffer: &mut [u8], new_value: u8, ) -> Result<(), FileParseError>

Writes a single byte at Field::offset.

impl<const N: usize> Field<FixedBytes<N>>

pub fn update( &mut self, buffer: &mut [u8], new_value: &[u8], ) -> Result<(), FileParseError>

Replaces the raw bytes, zero-padding to Field::size.

pub fn update_str( &mut self, buffer: &mut [u8], new_value: &str, ) -> Result<(), FileParseError>

Convenience wrapper around update for UTF-8 strings.

impl Field<u16>

pub fn update( &mut self, buffer: &mut [u8], new_value: u16, ) -> Result<(), FileParseError>

Updates the buffer at the specified offset with the new value for u16.

pub fn update_with( &mut self, buffer: &mut [u8], new_value: u16, order: ByteOrder, ) -> Result<(), FileParseError>

Updates the buffer using the specified byte order.

impl Field<String>

pub fn update( &mut self, buffer: &mut [u8], new_value: &str, ) -> Result<(), FileParseError>

Updates the buffer at the specified offset with the new UTF-8 encoded string.

impl Field<ImageBase>

pub fn update( &mut self, buffer: &mut [u8], new_value: ImageBase, ) -> Result<(), FileParseError>

Updates the image base in the PE optional header (always little-endian).

impl Field<SizedU64>

pub fn update( &mut self, buffer: &mut [u8], new_value: SizedU64, ) -> Result<(), FileParseError>

Updates a stack/heap size field (4 bytes for PE32, 8 for PE32+).

Trait Implementations

impl<T: Clone> Clone for Field<T>

fn clone(&self) -> Field<T>

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug> Debug for Field<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.