Struct SBig 

pub struct SBig { /* private fields */ }

Signed integer (-1)^neg · mag. Zero is always stored with neg = false.

Implementations

impl SBig

pub fn zero(bits: u32) -> Self

pub fn from_uint(mag: BoxedUint) -> Self

Non-negative value.

pub fn from_i64(v: i64) -> Self

pub fn is_neg(&self) -> Choice

pub fn mag(&self) -> &BoxedUint

pub fn is_zero(&self) -> Choice

pub fn bits_precision(&self) -> u32

pub fn negate(&self) -> Self

pub fn add(&self, rhs: &Self) -> Self

pub fn sub(&self, rhs: &Self) -> Self

pub fn mul(&self, rhs: &Self) -> Self

pub fn rem_euclid(&self, m: &NonZero<BoxedUint>) -> BoxedUint

Euclidean remainder in [0, m).

pub fn in_range(&self, range: SRange) -> bool

Checks |z| ≤ 2^{n−1} (public data).

pub fn random_in<R: Rng + ?Sized>(rng: &mut R, range: SRange) -> Self

Uniform sample from ±2^n: u − 2^{n−1} + 1 with u ← [0, 2^n).

pub fn random_in_size<R: Rng + ?Sized>( rng: &mut R, size: &BoxedUint, ) -> Result<Self>

Uniform sample from an interval of size consecutive integers {−size/2+1, …, size/2} (size even, at least 2), i.e. the paper’s ±size.

pub fn to_bytes(&self, range: SRange) -> Result<Vec<u8>>

Encodes as sign byte 0x00/0x01 followed by ⌈(n−1)/8⌉ big-endian magnitude bytes (spec §10.2).

pub fn from_bytes(bytes: &[u8], range: SRange) -> Result<Self>

Trait Implementations

impl Clone for SBig

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SBig

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

Formats the value using the given formatter.

impl Eq for SBig

impl PartialEq for SBig

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

Equality operator ==.

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

Inequality operator !=.

impl Zeroize for SBig

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.