Struct bignum::u256

pub struct u256 { /* fields omitted */ }

Stack-allocated arbitrary-precision (up to certain limit) integer.

This is backed by a fixed-size array of given type ("digit"). While the array is not very large (normally some hundred bytes), copying it recklessly may result in the performance hit. Thus this is intentionally not Copy.

All operations available to bignums panic in the case of overflows. The caller is responsible to use large enough bignum types.

Methods

impl u256

pub fn from_small(v: u32) -> u256

Makes a bignum from one digit.

pub fn from_u64(v: u64) -> u256

Makes a bignum from u64 value.

pub fn digits(&self) -> &[u32]

Returns the internal digits as a slice [a, b, c, ...] such that the numeric value is a + b * 2^W + c * 2^(2W) + ... where W is the number of bits in the digit type.

pub fn get_bit(&self, i: usize) -> u8

Returns the i-th bit where bit 0 is the least significant one. In other words, the bit with weight 2^i.

pub fn is_zero(&self) -> bool

Returns true if the bignum is zero.

pub fn bit_length(&self) -> usize

Returns the number of bits necessary to represent this value. Note that zero is considered to need 0 bits.

impl u256

pub const MIN: u256

MIN: u256 = <u256>::min_value()

The smallest value that can be represented by this integer type.

pub const MAX: u256

MAX: u256 = <u256>::max_value()

The largest value that can be represented by this integer type.

pub const fn min_value() -> u256

pub const fn max_value() -> u256

pub fn from_str_radix(src: &str, radix: u32) -> Result<Self, ParseIntError>

pub fn count_ones(self) -> u32

pub fn count_zeros(self) -> u32

pub fn leading_zeros(self) -> u32

pub fn trailing_zeros(self) -> u32

pub fn rotate_left(self, n: u32) -> Self

pub fn rotate_right(self, n: u32) -> Self

pub fn swap_bytes(self) -> Self

pub fn reverse_bits(self) -> Self

pub fn from_be(x: Self) -> Self

pub fn from_le(x: Self) -> Self

pub fn to_be(self) -> Self

pub fn to_le(self) -> Self

Trait Implementations

impl Add<u32> for u256

type Output = u256

The resulting type after applying the + operator.

fn add(self, other: u32) -> u256

Performs the + operation.

impl AddAssign<u32> for u256

fn add_assign(&mut self, other: u32)

Performs the += operation.

impl Add<u256> for u256

type Output = u256

The resulting type after applying the + operator.

fn add(self, other: u256) -> u256

Performs the + operation.

impl AddAssign<u256> for u256

fn add_assign(&mut self, other: u256)

Performs the += operation.

impl Sub<u256> for u256

type Output = u256

The resulting type after applying the - operator.

fn sub(self, other: u256) -> u256

Performs the - operation.

impl SubAssign<u256> for u256

fn sub_assign(&mut self, other: u256)

Performs the -= operation.

impl Mul<u32> for u256

type Output = u256

The resulting type after applying the * operator.

fn mul(self, rhs: u32) -> u256

Performs the * operation.

impl Mul<u256> for u256

type Output = u256

The resulting type after applying the * operator.

fn mul(self, rhs: u256) -> u256

Performs the * operation.

impl MulAssign<u32> for u256

fn mul_assign(&mut self, other: u32)

Performs the *= operation.

impl MulAssign<u256> for u256

fn mul_assign(&mut self, rhs: u256)

Performs the *= operation.

impl Rem<u32> for u256

type Output = u32

The resulting type after applying the % operator.

fn rem(self, other: u32) -> u32

Performs the % operation.

impl RemAssign<u32> for u256

fn rem_assign(&mut self, other: u32)

Performs the %= operation.

impl Rem<u256> for u256

type Output = u256

The resulting type after applying the % operator.

fn rem(self, other: u256) -> u256

Performs the % operation.

impl RemAssign<u256> for u256

fn rem_assign(&mut self, other: u256)

Performs the %= operation.

impl Div<u32> for u256

type Output = u256

The resulting type after applying the / operator.

fn div(self, other: u32) -> u256

Performs the / operation.

impl DivAssign<u32> for u256

fn div_assign(&mut self, other: u32)

Performs the /= operation.

impl Div<u256> for u256

type Output = u256

The resulting type after applying the / operator.

fn div(self, other: u256) -> u256

Performs the / operation.

impl DivAssign<u256> for u256

fn div_assign(&mut self, other: u256)

Performs the /= operation.

impl Not for u256

type Output = u256

The resulting type after applying the ! operator.

fn not(self) -> u256

Performs the unary ! operation.

impl PartialEq for u256

fn eq(&self, other: &u256) -> 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 !=.

impl Eq for u256

impl PartialOrd for u256

fn partial_cmp(&self, other: &u256) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Ord for u256

fn cmp(&self, other: &u256) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

impl Display for u256

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

Formats the value using the given formatter.

impl Debug for u256

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

Formats the value using the given formatter.

impl LowerHex for u256

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

Formats the value using the given formatter.

impl UpperHex for u256

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

Formats the value using the given formatter.

impl Binary for u256

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

Formats the value using the given formatter.

impl Copy for u256

impl Clone for u256

fn clone(&self) -> u256

Returns a copy of the value.

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

Performs copy-assignment from source.

impl From<i8> for u256

fn from(small: i8) -> u256

Performs the conversion.

impl From<u8> for u256

fn from(small: u8) -> u256

Performs the conversion.

impl From<i16> for u256

fn from(small: i16) -> u256

Performs the conversion.

impl From<u16> for u256

fn from(small: u16) -> u256

Performs the conversion.

impl From<i32> for u256

fn from(small: i32) -> u256

Performs the conversion.

impl From<u32> for u256

fn from(small: u32) -> u256

Performs the conversion.

impl From<i64> for u256

fn from(small: i64) -> u256

Performs the conversion.

impl From<u64> for u256

fn from(small: u64) -> u256

Performs the conversion.

impl From<isize> for u256

fn from(small: isize) -> u256

Performs the conversion.

impl From<usize> for u256

fn from(small: usize) -> u256

Performs the conversion.