Struct FieldValue 

pub struct FieldValue { /* private fields */ }

A wrapper around the value of a Field inside a HID Report’s byte array. This value may be signed, depending on the Field.

let bytes: Vec<u8> = read_from_device();
let val = field.extract(bytes.as_slice()).unwrap();
if val.is_signed() {
  let unsigned: u32 = val.into();
} else {
  let signed: i32 = val.into();
}

The value is always of size u32 or i32, regardless of the number of bits in the HID Report. Cast to u16, u8, etc. as needed.

Implementations

impl FieldValue

pub fn is_signed(&self) -> bool

Returns true if the contained value is signed, false otherwise.

Trait Implementations

impl Clone for FieldValue

fn clone(&self) -> FieldValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldValue

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

Formats the value using the given formatter.

impl From<&FieldValue> for i16

fn from(v: &FieldValue) -> i16

Converts to this type from the input type.

impl From<&FieldValue> for i32

fn from(v: &FieldValue) -> i32

Converts to this type from the input type.

impl From<&FieldValue> for i8

fn from(v: &FieldValue) -> i8

Converts to this type from the input type.

impl From<&FieldValue> for u16

fn from(v: &FieldValue) -> u16

Converts to this type from the input type.

impl From<&FieldValue> for u32

fn from(v: &FieldValue) -> u32

Converts to this type from the input type.

impl From<&FieldValue> for u8

fn from(v: &FieldValue) -> u8

Converts to this type from the input type.

impl From<FieldValue> for i16

fn from(f: FieldValue) -> i16

Converts to this type from the input type.

impl From<FieldValue> for i32

fn from(f: FieldValue) -> i32

Converts to this type from the input type.

impl From<FieldValue> for i8

fn from(f: FieldValue) -> i8

Converts to this type from the input type.

impl From<FieldValue> for u16

fn from(f: FieldValue) -> u16

Converts to this type from the input type.

impl From<FieldValue> for u32

fn from(f: FieldValue) -> u32

Converts to this type from the input type.

impl From<FieldValue> for u8

fn from(f: FieldValue) -> u8

Converts to this type from the input type.

impl Copy for FieldValue