Struct num::bigint::BigUint
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pub struct BigUint {
// some fields omitted
}A big unsigned integer type.
A BigUint-typed value BigUint { data: vec!(a, b, c) } represents a number
(a + b * big_digit::BASE + c * big_digit::BASE^2).
Methods
impl BigUint
fn new(digits: Vec<BigDigit>) -> BigUint
Creates and initializes a BigUint.
The digits are in little-endian base 232.
fn from_slice(slice: &[BigDigit]) -> BigUint
Creates and initializes a BigUint.
The digits are in little-endian base 232.
fn from_bytes_be(bytes: &[u8]) -> BigUint
Creates and initializes a BigUint.
The bytes are in big-endian byte order.
Examples
extern crate num; fn main() { use num::bigint::BigUint; assert_eq!(BigUint::from_bytes_be(b"A"), BigUint::parse_bytes(b"65", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"AA"), BigUint::parse_bytes(b"16705", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"AB"), BigUint::parse_bytes(b"16706", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"Hello world!"), BigUint::parse_bytes(b"22405534230753963835153736737", 10).unwrap()); }use num::bigint::BigUint; assert_eq!(BigUint::from_bytes_be(b"A"), BigUint::parse_bytes(b"65", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"AA"), BigUint::parse_bytes(b"16705", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"AB"), BigUint::parse_bytes(b"16706", 10).unwrap()); assert_eq!(BigUint::from_bytes_be(b"Hello world!"), BigUint::parse_bytes(b"22405534230753963835153736737", 10).unwrap());
fn from_bytes_le(bytes: &[u8]) -> BigUint
Creates and initializes a BigUint.
The bytes are in little-endian byte order.
fn to_bytes_le(&self) -> Vec<u8>
Returns the byte representation of the BigUint in little-endian byte order.
Examples
extern crate num; fn main() { use num::bigint::BigUint; let i = BigUint::parse_bytes(b"1125", 10).unwrap(); assert_eq!(i.to_bytes_le(), vec![101, 4]); }use num::bigint::BigUint; let i = BigUint::parse_bytes(b"1125", 10).unwrap(); assert_eq!(i.to_bytes_le(), vec![101, 4]);
fn to_bytes_be(&self) -> Vec<u8>
Returns the byte representation of the BigUint in big-endian byte order.
Examples
extern crate num; fn main() { use num::bigint::BigUint; let i = BigUint::parse_bytes(b"1125", 10).unwrap(); assert_eq!(i.to_bytes_be(), vec![4, 101]); }use num::bigint::BigUint; let i = BigUint::parse_bytes(b"1125", 10).unwrap(); assert_eq!(i.to_bytes_be(), vec![4, 101]);
fn to_str_radix(&self, radix: u32) -> String
Returns the integer formatted as a string in the given radix.
radix must be in the range [2, 36].
Examples
extern crate num; fn main() { use num::bigint::BigUint; let i = BigUint::parse_bytes(b"ff", 16).unwrap(); assert_eq!(i.to_str_radix(16), "ff"); }use num::bigint::BigUint; let i = BigUint::parse_bytes(b"ff", 16).unwrap(); assert_eq!(i.to_str_radix(16), "ff");
fn parse_bytes(buf: &[u8], radix: u32) -> Option<BigUint>
Creates and initializes a BigUint.
Examples
extern crate num; fn main() { use num::bigint::{BigUint, ToBigUint}; assert_eq!(BigUint::parse_bytes(b"1234", 10), ToBigUint::to_biguint(&1234)); assert_eq!(BigUint::parse_bytes(b"ABCD", 16), ToBigUint::to_biguint(&0xABCD)); assert_eq!(BigUint::parse_bytes(b"G", 16), None); }use num::bigint::{BigUint, ToBigUint}; assert_eq!(BigUint::parse_bytes(b"1234", 10), ToBigUint::to_biguint(&1234)); assert_eq!(BigUint::parse_bytes(b"ABCD", 16), ToBigUint::to_biguint(&0xABCD)); assert_eq!(BigUint::parse_bytes(b"G", 16), None);
fn bits(&self) -> usize
Determines the fewest bits necessary to express the BigUint.