Struct crypto_bigint::Reciprocal

pub struct Reciprocal { /* private fields */ }

A pre-calculated reciprocal for division by a single limb.

Implementations

impl Reciprocal

pub const fn ct_new(divisor: Limb) -> (Self, CtChoice)

Pre-calculates a reciprocal for a known divisor, to be used in the single-limb division later. Returns the reciprocal, and the truthy value if divisor != 0 and the falsy value otherwise.

Note: if the returned flag is falsy, the returned reciprocal object is still self-consistent and can be passed to functions here without causing them to panic, but the results are naturally not to be used.

pub const fn default() -> Self

Returns a default instance of this object. It is a self-consistent Reciprocal that will not cause panics in functions that take it.

NOTE: intended for using it as a placeholder during compile-time array generation, don’t rely on the contents.

pub fn new(divisor: Limb) -> CtOption<Self>

A non-const-fn version of new_const(), wrapping the result in a CtOption.

Trait Implementations

impl Clone for Reciprocal

fn clone(&self) -> Reciprocal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl ConditionallySelectable for Reciprocal

fn conditional_select(a: &Self, b: &Self, choice: Choice) -> Self

Select a or b according to choice.

fn conditional_assign(&mut self, other: &Self, choice: Choice)

Conditionally assign other to self, according to choice.

fn conditional_swap(a: &mut Self, b: &mut Self, choice: Choice)

Conditionally swap self and other if choice == 1; otherwise, reassign both unto themselves.

impl Debug for Reciprocal

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

Formats the value using the given formatter.

impl Default for Reciprocal

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Reciprocal

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

This method tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for Reciprocal

impl Eq for Reciprocal

impl StructuralEq for Reciprocal

impl StructuralPartialEq for Reciprocal