Struct script::Num

[+] Show declaration

pub struct Num { /* fields omitted */ }

[−] Expand description

Script numeric

Numeric opcodes (OP_1ADD, etc) are restricted to operating on 4-byte integers. The semantics are subtle, though: operands must be in the range [-2^31 +1...2^31 -1], but results may overflow (and are valid as long as they are not used in a subsequent numeric operation). CScriptNum enforces those semantics by storing results as an int64 and allowing out-of-range values to be returned as a vector of bytes but throwing an exception if arithmetic is done or the result is interpreted as an integer.

Methods

impl Num

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pub fn minimally_encode(data: &[u8], max_size: usize) -> Result<Self, Error>

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Reduce the data size to its minimal, and then try to convert it to a num.

pub fn from_slice(     data: &[u8],     require_minimal: bool,     max_size: usize ) -> Result<Self, Error>

Important traits for Bytes

impl Write for Bytes

pub fn to_bytes(&self) -> Bytes

pub fn is_negative(&self) -> bool

pub fn is_zero(&self) -> bool

pub fn abs(&self) -> Num

Trait Implementations

impl Debug for Num

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

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Formats the value using the given formatter.

impl PartialEq for Num

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

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

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

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This method tests for !=.

impl Eq for Num

impl PartialOrd for Num

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

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

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

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

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

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

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

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

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

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

impl Ord for Num

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

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This method returns an Ordering between self and other.

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

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Compares and returns the maximum of two values.

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

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Compares and returns the minimum of two values.

impl Clone for Num

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fn clone(&self) -> Num

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Returns a copy of the value.

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

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Performs copy-assignment from source.

impl Copy for Num

impl From<bool> for Num

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fn from(i: bool) -> Self

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Performs the conversion.

impl From<u8> for Num

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fn from(i: u8) -> Self

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Performs the conversion.

impl From<u32> for Num

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fn from(i: u32) -> Self

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Performs the conversion.

impl From<usize> for Num

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fn from(i: usize) -> Self

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Performs the conversion.

impl From<i32> for Num

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fn from(i: i32) -> Self

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Performs the conversion.

impl From<i64> for Num

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fn from(i: i64) -> Self

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Performs the conversion.

impl From<Num> for i64

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fn from(n: Num) -> Self

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Performs the conversion.

impl From<Num> for u32

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fn from(n: Num) -> Self

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Performs the conversion.

impl From<Num> for usize

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fn from(n: Num) -> Self

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Performs the conversion.

impl BitAnd for Num

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type Output = Self

The resulting type after applying the & operator.

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

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Performs the & operation.

impl Add for Num

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type Output = Self

The resulting type after applying the + operator.

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

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Performs the + operation.

impl Sub for Num

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type Output = Self

The resulting type after applying the - operator.

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

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Performs the - operation.

impl Neg for Num

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type Output = Self

The resulting type after applying the - operator.

fn neg(self) -> Self::Output

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Performs the unary - operation.

impl Div for Num

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type Output = Self

The resulting type after applying the / operator.

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

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Performs the / operation.

impl Rem for Num

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type Output = Self

The resulting type after applying the % operator.

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

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Performs the % operation.