Struct num_bigfloat::BigFloat

pub struct BigFloat { /* private fields */ }

Number representation.

Implementations

impl BigFloat

pub fn new() -> Self

Return new BigFloat with value zero.

pub fn from_bytes(bytes: &[u8], sign: i8, exponent: i8) -> BigFloat

Create a BigFloat value from a sequence of bytes. Each byte must represent a decimal digit. First byte is the most significant. The length of bytes can be any. If the length of bytes is greater than required, then the remaining part is ignored. If sign is negative, then the resulting BigFloat will be negative.

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

Get BigFloat’s mantissa as bytes. Each byte represents a decimal digit. First byte is the most significant. The length of bytes can be any. If the length of bytes is smaller than required, then remaining part of mantissa will be omitted.

The length of mantissa can be determined using get_mantissa_len.

pub fn get_mantissa_len(&self) -> usize

Return the number of decimal positions filled in the mantissa.

pub fn get_sign(&self) -> i8

Return 1 if BigFloat is positive, -1 otherwise.

pub fn get_exponent(&self) -> i8

Return exponent part.

pub fn add(&self, d2: &BigFloat) -> Result<BigFloat, Error>

Add d2 and return result of addition.

Errors

ExponentOverflow - in case of too big or too small numbers.

pub fn sub(&self, d2: &BigFloat) -> Result<BigFloat, Error>

Subtract d2 and return result of subtraction.

Errors

ExponentOverflow - in case of too big or too small numbers.

pub fn mul(&self, d2: &BigFloat) -> Result<BigFloat, Error>

Multiply by d2 and return result of multiplication.

Errors

ExponentOverflow - in case of too big or too small numbers.

pub fn div(&self, d2: &BigFloat) -> Result<BigFloat, Error>

Divide by d2 and return result of division.

Errors

ExponentOverflow - in case of too big or too small numbers. DivisionByZero - in case of d2 equal to zero.

pub fn cmp(&self, d2: &BigFloat) -> i16

Compare to d2. Returns positive if self > d2, negative if self < d2, 0 otherwise.

pub fn to_raw_parts(&self) -> ([i16; 10], i16, i8, i8)

Return raw parts of BigFloat: mantissa, number of decimal positions in mantissa, sing, and exponent.

pub fn from_raw_parts(
    mantissa: [i16; 10],
    mantissa_len: i16,
    sign: i8,
    exponent: i8
) -> Self

Construct BigFloat from raw parts.

Trait Implementations

impl Clone for BigFloat

fn clone(&self) -> BigFloat

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for BigFloat

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

Formats the value using the given formatter.

impl Copy for BigFloat