Struct bitcoin_primitives::ArithU256

pub struct ArithU256 { /* private fields */ }

| 256-bit unsigned big integer. |

Implementations

impl ArithU256

pub fn set_compact( &mut self, n_compact: u32, pf_negative: *mut bool, pf_overflow: *mut bool ) -> &mut ArithU256

| This implementation directly uses | shifts instead of going through an intermediate | MPI representation. | | The “compact” format is a representation | of a whole number N using an unsigned | 32bit number similar to a floating point | format. | | The most significant 8 bits are the unsigned | exponent of base 256. | | This exponent can be thought of as “number | of bytes of N”. | | The lower 23 bits are the mantissa. | | Bit number 24 (0x800000) represents | the sign of N. | | N = (-1^sign) * mantissa * 256^(exponent-3) | | Satoshi’s original implementation | used BN_bn2mpi() and BN_mpi2bn(). | | MPI uses the most significant bit of | the first byte as sign. | | Thus 0x1234560000 is compact (0x05123456) | | And 0xc0de000000 is compact (0x0600c0de) | | Bitcoin only uses this “compact” format | for encoding difficulty targets, which | are unsigned 256bit quantities. Thus, | all the complexities of the sign bit | and using base 256 are probably an implementation | accident. |

pub fn get_compact(&self, negative: Option<bool>) -> u32

Trait Implementations

impl Clone for ArithU256

fn clone(&self) -> ArithU256

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ArithU256

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

Formats the value using the given formatter.

impl Default for ArithU256

fn default() -> ArithU256

Returns the “default value” for a type.

impl DivAssign<&ArithU256> for ArithU256

fn div_assign(&mut self, b: &ArithU256)

Performs the /= operation.

impl DivAssign<i64> for ArithU256

fn div_assign(&mut self, b64: i64)

Performs the /= operation.

impl DivAssign<u32> for ArithU256

fn div_assign(&mut self, b32: u32)

Performs the /= operation.

impl From<&BaseUInt<256>> for ArithU256

fn from(b: &BaseUInt<256>) -> Self

Converts to this type from the input type.

impl From<&str> for ArithU256

fn from(str_: &str) -> Self

Converts to this type from the input type.

impl From<u64> for ArithU256

fn from(b: u64) -> Self

Converts to this type from the input type.

impl MulAssign<&ArithU256> for ArithU256

fn mul_assign(&mut self, b: &ArithU256)

Performs the *= operation.

impl MulAssign<i64> for ArithU256

fn mul_assign(&mut self, b64: i64)

Performs the *= operation.

impl MulAssign<u32> for ArithU256

fn mul_assign(&mut self, b32: u32)

Performs the *= operation.

impl Ord for ArithU256

fn cmp(&self, other: &ArithU256) -> Ordering

This method returns an Ordering between self and other.

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

Compares and returns the maximum of two values.

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

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Selfwhere Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval.

impl PartialEq<ArithU256> for ArithU256

fn eq(&self, other: &ArithU256) -> 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 PartialOrd<ArithU256> for ArithU256

fn partial_cmp(&self, other: &ArithU256) -> 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 Eq for ArithU256

impl Send for ArithU256

impl StructuralEq for ArithU256

impl StructuralPartialEq for ArithU256

impl Sync for ArithU256