Enum Count

#[repr(u16)]
pub enum Count {
    Bytes(u16),
    Blocks(u16),
    Infinite,
}

Represents the byte/block count field of the Argument.

Variants

Bytes(u16)

Represents the bytes transferred.

Blocks(u16)

Represents the blocks transferred.

Infinite

Represents an infinite number of blocks transferred until an I/O abort is sent.

Implementations

impl Count

pub const MIN: u16 = 1u16

Represents the minimal count value.

pub const MAX: u16 = 511u16

Represents the maximal count value (other than special value assigned to zero).

pub const MAX_BYTES: u16 = 512u16

Represents the maximum byte count indicated by zero in the raw value.

pub const fn new() -> Self

Creates a new Count.

pub const fn from_parts(mode: BlockMode, val: u16) -> Result<Self>

Attempts to convert component parts into a Count.

pub const fn from_parts_unchecked(mode: BlockMode, val: u16) -> Self

Converts the component parts into a Count.

Safety

User must verify that val is in the valid range: 0 - 511.

pub const fn into_parts(self) -> (BlockMode, u16)

Converts the Count into component parts.

Trait Implementations

impl Clone for Count

fn clone(&self) -> Count

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Count

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

Formats the value using the given formatter.

impl Default for Count

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Count

fn eq(&self, other: &Count) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for Count

impl Eq for Count

impl StructuralPartialEq for Count