[]Struct sp_core::U256

#[repr(C)]pub struct U256(pub [u64; 4]);

Little-endian large integer type 256-bit unsigned integer.

Methods

impl U256[src]

pub fn full_mul(self, other: U256) -> U512[src]

Multiplies two 256-bit integers to produce full 512-bit integer No overflow possible

impl U256

pub fn low_u128(&self) -> u128

Low 2 words (u128)

pub fn as_u128(&self) -> u128

Conversion to u128 with overflow checking

Panics

Panics if the number is larger than 2^128.

impl U256

pub const MAX: U256

Maximum value.

pub fn from_dec_str(value: &str) -> Result<U256, FromDecStrErr>

Convert from a decimal string.

pub fn low_u32(&self) -> u32

Conversion to u32

pub fn low_u64(&self) -> u64

Low word (u64)

pub fn as_u32(&self) -> u32

Conversion to u32 with overflow checking

Panics

Panics if the number is larger than 2^32.

pub fn as_u64(&self) -> u64

Conversion to u64 with overflow checking

Panics

Panics if the number is larger than u64::max_value().

pub fn as_usize(&self) -> usize

Conversion to usize with overflow checking

Panics

Panics if the number is larger than usize::max_value().

pub fn is_zero(&self) -> bool

Whether this is zero.

pub fn bits(&self) -> usize

Return the least number of bits needed to represent the number

pub fn bit(&self, index: usize) -> bool

Return if specific bit is set.

Panics

Panics if index exceeds the bit width of the number.

pub fn leading_zeros(&self) -> u32

Returns the number of leading zeros in the binary representation of self.

pub fn trailing_zeros(&self) -> u32

Returns the number of leading zeros in the binary representation of self.

pub fn byte(&self, index: usize) -> u8

Return specific byte.

Panics

Panics if index exceeds the byte width of the number.

pub fn to_big_endian(&self, bytes: &mut [u8])

Write to the slice in big-endian format.

pub fn to_little_endian(&self, bytes: &mut [u8])

Write to the slice in little-endian format.

pub fn exp10(n: usize) -> U256

Create 10**n as this type.

Panics

Panics if the result overflows the type.

pub fn zero() -> U256

Zero (additive identity) of this type.

pub fn one() -> U256

One (multiplicative identity) of this type.

pub fn max_value() -> U256

The maximum value which can be inhabited by this type.

pub fn div_mod(self, other: U256) -> (U256, U256)

Returns a pair (self / other, self % other).

Panics

Panics if other is zero.

pub fn pow(self, expon: U256) -> U256

Fast exponentiation by squaring https://en.wikipedia.org/wiki/Exponentiation_by_squaring

Panics

Panics if the result overflows the type.

pub fn overflowing_pow(self, expon: U256) -> (U256, bool)

Fast exponentiation by squaring. Returns result and overflow flag.

pub fn overflowing_add(self, other: U256) -> (U256, bool)

Add with overflow.

pub fn saturating_add(self, other: U256) -> U256

Addition which saturates at the maximum value (Self::max_value()).

pub fn checked_add(self, other: U256) -> Option<U256>

Checked addition. Returns None if overflow occurred.

pub fn overflowing_sub(self, other: U256) -> (U256, bool)

Subtraction which underflows and returns a flag if it does.

pub fn saturating_sub(self, other: U256) -> U256

Subtraction which saturates at zero.

pub fn checked_sub(self, other: U256) -> Option<U256>

Checked subtraction. Returns None if overflow occurred.

pub fn overflowing_mul(self, other: U256) -> (U256, bool)

Multiply with overflow, returning a flag if it does.

pub fn saturating_mul(self, other: U256) -> U256

Multiplication which saturates at the maximum value..

pub fn checked_mul(self, other: U256) -> Option<U256>

Checked multiplication. Returns None if overflow occurred.

pub fn checked_div(self, other: U256) -> Option<U256>

Checked division. Returns None if other == 0.

pub fn checked_rem(self, other: U256) -> Option<U256>

Checked modulus. Returns None if other == 0.

pub fn overflowing_neg(self) -> (U256, bool)

Negation with overflow.

pub fn checked_neg(self) -> Option<U256>

Checked negation. Returns None unless self == 0.

pub fn from_big_endian(slice: &[u8]) -> U256

Converts from big endian representation bytes in memory.

pub fn from_little_endian(slice: &[u8]) -> U256

Converts from little endian representation bytes in memory.

Trait Implementations

impl<'a, T> Add<T> for &'a U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the + operator.

impl<T> Add<T> for U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the + operator.

impl AddAssign<U256> for U256

impl AsRef<[u64]> for U256

Get a reference to the underlying little-endian words.

impl BitAnd<U256> for U256

type Output = U256

The resulting type after applying the & operator.

impl BitOr<U256> for U256

type Output = U256

The resulting type after applying the | operator.

impl BitXor<U256> for U256

type Output = U256

The resulting type after applying the ^ operator.

impl Clone for U256

impl Copy for U256

impl Debug for U256

impl Decodable for U256

impl Decode for U256

impl Default for U256

impl<'de> Deserialize<'de> for U256

impl Display for U256

impl<'a, T> Div<T> for &'a U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the / operator.

impl<T> Div<T> for U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the / operator.

impl<T> DivAssign<T> for U256 where
    T: Into<U256>, 

impl Encodable for U256

impl Encode for U256

impl EncodeLike<U256> for U256

impl Eq for U256

impl<'a> From<&'a [u8; 32]> for U256

impl<'a> From<&'a [u8]> for U256

impl<'a> From<&'a U256> for U512[src]

impl<'a> From<&'a U256> for U256

impl From<&'static str> for U256

impl From<[u8; 32]> for U256

impl From<U128> for U256[src]

impl From<U256> for U512[src]

impl From<i128> for U256

impl From<i16> for U256

impl From<i32> for U256

impl From<i64> for U256

impl From<i8> for U256

impl From<isize> for U256

impl From<u128> for U256

impl From<u16> for U256

impl From<u32> for U256

impl From<u64> for U256

impl From<u8> for U256

impl From<usize> for U256

impl FromStr for U256

type Err = FromHexError

The associated error which can be returned from parsing.

impl Hash for U256

impl LowerHex for U256

impl MallocSizeOf for U256[src]

impl<'a> Mul<&'a U256> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a U256> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i16> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i16> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i32> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i32> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i64> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i64> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i8> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a i8> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a isize> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a isize> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u16> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u16> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u32> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u32> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u64> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u64> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u8> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a u8> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a usize> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<&'a usize> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<U256> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<U256> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<i16> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<i16> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<i32> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<i32> for U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<i64> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<i64> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<i8> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<i8> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<isize> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<isize> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<u16> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<u16> for U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<u32> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<u32> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<u64> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<u64> for U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<u8> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<u8> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl Mul<usize> for U256

type Output = U256

The resulting type after applying the * operator.

impl<'a> Mul<usize> for &'a U256

type Output = U256

The resulting type after applying the * operator.

impl MulAssign<U256> for U256

impl MulAssign<i16> for U256

impl MulAssign<i32> for U256

impl MulAssign<i64> for U256

impl MulAssign<i8> for U256

impl MulAssign<isize> for U256

impl MulAssign<u16> for U256

impl MulAssign<u32> for U256

impl MulAssign<u64> for U256

impl MulAssign<u8> for U256

impl MulAssign<usize> for U256

impl Not for U256

type Output = U256

The resulting type after applying the ! operator.

impl Ord for U256

impl PartialEq<U256> for U256

impl PartialOrd<U256> for U256

impl<'a, T> Rem<T> for &'a U256 where
    T: Into<U256> + Copy

type Output = U256

The resulting type after applying the % operator.

impl<T> Rem<T> for U256 where
    T: Into<U256> + Copy

type Output = U256

The resulting type after applying the % operator.

impl<T> RemAssign<T> for U256 where
    T: Into<U256> + Copy

impl Serialize for U256

impl<'a, T> Shl<T> for &'a U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the << operator.

impl<T> Shl<T> for U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the << operator.

impl<T> ShlAssign<T> for U256 where
    T: Into<U256>, 

impl<T> Shr<T> for U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the >> operator.

impl<'a, T> Shr<T> for &'a U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the >> operator.

impl<T> ShrAssign<T> for U256 where
    T: Into<U256>, 

impl StructuralEq for U256

impl StructuralPartialEq for U256

impl<T> Sub<T> for U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the - operator.

impl<'a, T> Sub<T> for &'a U256 where
    T: Into<U256>, 

type Output = U256

The resulting type after applying the - operator.

impl SubAssign<U256> for U256

impl<'a> TryFrom<&'a U512> for U256[src]

type Error = Error

The type returned in the event of a conversion error.

impl TryFrom<U512> for U256[src]

type Error = Error

The type returned in the event of a conversion error.

Auto Trait Implementations

impl RefUnwindSafe for U256

impl Send for U256

impl Sync for U256

impl Unpin for U256

impl UnwindSafe for U256

Blanket Implementations

impl<T> Any for T where
    T: 'static + ?Sized
[src]

impl<T, U> AsByteSlice<T> for U where
    T: ToByteSlice,
    U: AsRef<[T]> + ?Sized
[src]

impl<T> Borrow<T> for T where
    T: ?Sized
[src]

impl<T> BorrowMut<T> for T where
    T: ?Sized
[src]

impl<T> Clear for T where
    T: InitializableFromZeroed + ?Sized
[src]

impl<S> Codec for S where
    S: Encode + Decode
[src]

impl<T, X> Decode for X where
    T: Decode + Into<X>,
    X: WrapperTypeDecode<Wrapped = T>, 
[src]

impl<T> DecodeAll for T where
    T: Decode
[src]

impl<T> DeserializeOwned for T where
    T: Deserialize<'de>, 
[src]

impl<T, X> Encode for X where
    T: Encode + ?Sized,
    X: WrapperTypeEncode<Target = T>, 
[src]

impl<'_, '_, T> EncodeLike<&'_ &'_ T> for T where
    T: Encode
[src]

impl<'_, T> EncodeLike<&'_ T> for T where
    T: Encode
[src]

impl<'_, T> EncodeLike<&'_ mut T> for T where
    T: Encode
[src]

impl<T> EncodeLike<Arc<T>> for T where
    T: Encode
[src]

impl<T> EncodeLike<Box<T>> for T where
    T: Encode
[src]

impl<'a, T> EncodeLike<Cow<'a, T>> for T where
    T: Encode + ToOwned
[src]

impl<T> EncodeLike<Rc<T>> for T where
    T: Encode
[src]

impl<T> From<T> for T[src]

impl<S> FullCodec for S where
    S: Decode + FullEncode
[src]

impl<S> FullEncode for S where
    S: Encode + EncodeLike<S>, 
[src]

impl<T> InitializableFromZeroed for T where
    T: Default
[src]

impl<T, U> Into<U> for T where
    U: From<T>, 
[src]

impl<T, Outer> IsWrappedBy<Outer> for T where
    Outer: AsRef<T> + AsMut<T> + From<T>,
    T: From<Outer>, 
[src]

fn from_ref(&Outer) -> &T[src]

Get a reference to the inner from the outer.

fn from_mut(&mut Outer) -> &mut T[src]

Get a mutable reference to the inner from the outer.

impl<T> KeyedVec for T where
    T: Codec
[src]

impl<T> MallocSizeOfExt for T where
    T: MallocSizeOf
[src]

impl<T> MaybeDebug for T where
    T: Debug
[src]

impl<T> MaybeRefUnwindSafe for T where
    T: RefUnwindSafe
[src]

impl<T, Rhs> NumAssignOps<Rhs> for T where
    T: AddAssign<Rhs> + SubAssign<Rhs> + MulAssign<Rhs> + DivAssign<Rhs> + RemAssign<Rhs>, 
[src]

impl<T, Rhs, Output> NumOps<Rhs, Output> for T where
    T: Sub<Rhs, Output = Output> + Mul<Rhs, Output = Output> + Div<Rhs, Output = Output> + Add<Rhs, Output = Output> + Rem<Rhs, Output = Output>, 
[src]

impl<T, Base> RefNum<Base> for T where
    T: NumOps<Base, Base> + NumOps<&'r Base, Base>, 
[src]

impl<T> Same<T> for T[src]

type Output = T

Should always be Self

impl<T> ToOwned for T where
    T: Clone
[src]

type Owned = T

The resulting type after obtaining ownership.

impl<T> ToString for T where
    T: Display + ?Sized
[src]

impl<T, U> TryFrom<U> for T where
    U: Into<T>, 
[src]

type Error = Infallible

The type returned in the event of a conversion error.

impl<T, U> TryInto<U> for T where
    U: TryFrom<T>, 
[src]

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

impl<S, T> UncheckedInto<T> for S where
    T: UncheckedFrom<S>, 
[src]

impl<V, T> VZip<V> for T where
    V: MultiLane<T>, 
[src]