Struct ontio_std::types::H256

#[repr(C)]
pub struct H256(pub [u8; 32]);

A byte array of length 32 representing the block hash, etc.

Example

  let block_hash:H256 = runtime::current_blockhash();
  let tx_hash:H256 = runtime::current_txhash();
  let hash:H256 = runtime::sha256("test");

Methods

impl H256

pub fn repeat_byte(byte: u8) -> H256

Returns a new fixed hash where all bits are set to the given byte.

pub fn zero() -> H256

Returns a new zero-initialized fixed hash.

pub fn len_bytes() -> usize

Returns the size of this hash in bytes.

pub fn as_bytes(&self) -> &[u8]

Extracts a byte slice containing the entire fixed hash.

pub fn as_bytes_mut(&mut self) -> &mut [u8]

Extracts a mutable byte slice containing the entire fixed hash.

pub fn as_fixed_bytes(&self) -> &[u8; 32]

Extracts a reference to the byte array containing the entire fixed hash.

pub fn as_fixed_bytes_mut(&mut self) -> &mut [u8; 32]

Extracts a reference to the byte array containing the entire fixed hash.

pub fn to_fixed_bytes(self) -> [u8; 32]

Returns the inner bytes array.

pub fn as_ptr(&self) -> *const u8

Returns a constant raw pointer to the value.

pub fn as_mut_ptr(&mut self) -> *mut u8

Returns a mutable raw pointer to the value.

pub fn assign_from_slice(&mut self, src: &[u8])

Assign the bytes from the byte slice src to self.

Note

The given bytes are interpreted in big endian order.

Panics

If the length of src and the number of bytes in self do not match.

pub fn from_slice(src: &[u8]) -> Self

Create a new fixed-hash from the given slice src.

Note

The given bytes are interpreted in big endian order.

Panics

If the length of src and the number of bytes in Self do not match.

pub fn covers(&self, b: &Self) -> bool

Returns true if all bits set in b are also set in self.

pub fn is_zero(&self) -> bool

Returns true if no bits are set.

impl H256

pub fn to_hex_string(&self) -> String

impl H256

pub const fn new(val: [u8; 32]) -> Self

Trait Implementations

impl AsMut<[u8]> for H256

fn as_mut(&mut self) -> &mut [u8]

Performs the conversion.

impl AsRef<[u8]> for H256

fn as_ref(&self) -> &[u8]

Performs the conversion.

impl AsRef<H256> for H256

fn as_ref(&self) -> &H256

Performs the conversion.

impl<'l, 'r> BitAnd<&'r H256> for &'l H256

type Output = H256

The resulting type after applying the & operator.

fn bitand(self, rhs: &'r H256) -> Self::Output

Performs the & operation.

impl BitAnd<H256> for H256

type Output = H256

The resulting type after applying the & operator.

fn bitand(self, rhs: Self) -> Self::Output

Performs the & operation.

impl<'r> BitAndAssign<&'r H256> for H256

fn bitand_assign(&mut self, rhs: &'r H256)

Performs the &= operation.

impl BitAndAssign<H256> for H256

fn bitand_assign(&mut self, rhs: H256)

Performs the &= operation.

impl<'l, 'r> BitOr<&'r H256> for &'l H256

type Output = H256

The resulting type after applying the | operator.

fn bitor(self, rhs: &'r H256) -> Self::Output

Performs the | operation.

impl BitOr<H256> for H256

type Output = H256

The resulting type after applying the | operator.

fn bitor(self, rhs: Self) -> Self::Output

Performs the | operation.

impl<'r> BitOrAssign<&'r H256> for H256

fn bitor_assign(&mut self, rhs: &'r H256)

Performs the |= operation.

impl BitOrAssign<H256> for H256

fn bitor_assign(&mut self, rhs: H256)

Performs the |= operation.

impl<'l, 'r> BitXor<&'r H256> for &'l H256

type Output = H256

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: &'r H256) -> Self::Output

Performs the ^ operation.

impl BitXor<H256> for H256

type Output = H256

The resulting type after applying the ^ operator.

fn bitxor(self, rhs: Self) -> Self::Output

Performs the ^ operation.

impl<'r> BitXorAssign<&'r H256> for H256

fn bitxor_assign(&mut self, rhs: &'r H256)

Performs the ^= operation.

impl BitXorAssign<H256> for H256

fn bitxor_assign(&mut self, rhs: H256)

Performs the ^= operation.

impl Clone for H256

fn clone(&self) -> H256

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for H256

impl Debug for H256

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

Formats the value using the given formatter.

impl Default for H256

fn default() -> Self

Returns the "default value" for a type.

impl Display for H256

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

Formats the value using the given formatter.

impl Encoder for H256

fn encode(&self, sink: &mut Sink)

impl Eq for H256

impl<'a> From<&'a [u8; 32]> for H256

fn from(bytes: &'a [u8; 32]) -> Self

Constructs a hash type from the given reference to the bytes array of fixed length.

Note

The given bytes are interpreted in big endian order.

impl<'a> From<&'a mut [u8; 32]> for H256

fn from(bytes: &'a mut [u8; 32]) -> Self

Constructs a hash type from the given reference to the mutable bytes array of fixed length.

Note

The given bytes are interpreted in big endian order.

impl From<[u8; 32]> for H256

fn from(bytes: [u8; 32]) -> Self

Constructs a hash type from the given bytes array of fixed length.

Note

The given bytes are interpreted in big endian order.

impl From<H256> for [u8; 32]

fn from(s: H256) -> Self

Performs the conversion.

impl Hash for H256

fn hash<H>(&self, state: &mut H) where
    H: Hasher, 

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given [Hasher].

impl<I> Index<I> for H256 where
    I: SliceIndex<[u8]>, 

type Output = I::Output

The returned type after indexing.

fn index(&self, index: I) -> &I::Output

Performs the indexing (container[index]) operation.

impl<I> IndexMut<I> for H256 where
    I: SliceIndex<[u8], Output = [u8]>, 

fn index_mut(&mut self, index: I) -> &mut I::Output

Performs the mutable indexing (container[index]) operation.

impl LowerHex for H256

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

Formats the value using the given formatter.

impl Ord for H256

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

This method returns an [Ordering] between self and other.

#[must_use] fn max(self, other: Self) -> Self

Compares and returns the maximum of two values.

#[must_use] fn min(self, other: Self) -> Self

Compares and returns the minimum of two values.

#[must_use] fn clamp(self, min: Self, max: Self) -> Self

🔬 This is a nightly-only experimental API. (clamp)

Restrict a value to a certain interval.

impl PartialEq<H256> for H256

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

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

#[must_use] fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl PartialOrd<H256> for H256

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

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

#[must_use] fn lt(&self, other: &Rhs) -> bool

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

#[must_use] fn le(&self, other: &Rhs) -> bool

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

#[must_use] fn gt(&self, other: &Rhs) -> bool

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

#[must_use] 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 UpperHex for H256

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

Formats the value using the given formatter.