Struct num::bigint::BigInt [−] [src]

pub struct BigInt {
    // some fields omitted
}

A big signed integer type.

Methods

`impl BigInt`

`fn new(sign: Sign, digits: Vec<BigDigit>) -> BigInt`

Creates and initializes a BigInt.

The digits are in little-endian base 2^32.

`fn from_biguint(sign: Sign, data: BigUint) -> BigInt`

Creates and initializes a BigInt.

The digits are in little-endian base 2^32.

`fn from_slice(sign: Sign, slice: &[BigDigit]) -> BigInt`

Creates and initializes a BigInt.

`fn from_bytes_be(sign: Sign, bytes: &[u8]) -> BigInt`

Creates and initializes a BigInt.

The bytes are in big-endian byte order.

Examples

extern crate num; fn main() { use num::bigint::{BigInt, Sign}; assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"A"), BigInt::parse_bytes(b"65", 10).unwrap()); assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"AA"), BigInt::parse_bytes(b"16705", 10).unwrap()); assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"AB"), BigInt::parse_bytes(b"16706", 10).unwrap()); assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"Hello world!"), BigInt::parse_bytes(b"22405534230753963835153736737", 10).unwrap()); }

use num::bigint::{BigInt, Sign};

assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"A"),
           BigInt::parse_bytes(b"65", 10).unwrap());
assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"AA"),
           BigInt::parse_bytes(b"16705", 10).unwrap());
assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"AB"),
           BigInt::parse_bytes(b"16706", 10).unwrap());
assert_eq!(BigInt::from_bytes_be(Sign::Plus, b"Hello world!"),
           BigInt::parse_bytes(b"22405534230753963835153736737", 10).unwrap());

`fn from_bytes_le(sign: Sign, bytes: &[u8]) -> BigInt`

Creates and initializes a BigInt.

The bytes are in little-endian byte order.

`fn to_bytes_le(&self) -> (Sign, Vec<u8>)`

Returns the sign and the byte representation of the BigInt in little-endian byte order.

Examples

extern crate num; fn main() { use num::bigint::{ToBigInt, Sign}; let i = -1125.to_bigint().unwrap(); assert_eq!(i.to_bytes_le(), (Sign::Minus, vec![101, 4])); }

use num::bigint::{ToBigInt, Sign};

let i = -1125.to_bigint().unwrap();
assert_eq!(i.to_bytes_le(), (Sign::Minus, vec![101, 4]));

`fn to_bytes_be(&self) -> (Sign, Vec<u8>)`

Returns the sign and the byte representation of the BigInt in big-endian byte order.

Examples

extern crate num; fn main() { use num::bigint::{ToBigInt, Sign}; let i = -1125.to_bigint().unwrap(); assert_eq!(i.to_bytes_be(), (Sign::Minus, vec![4, 101])); }

use num::bigint::{ToBigInt, Sign};

let i = -1125.to_bigint().unwrap();
assert_eq!(i.to_bytes_be(), (Sign::Minus, vec![4, 101]));

`fn parse_bytes(buf: &[u8], radix: u32) -> Option<BigInt>`

Creates and initializes a BigInt.

Examples

extern crate num; fn main() { use num::bigint::{BigInt, ToBigInt}; assert_eq!(BigInt::parse_bytes(b"1234", 10), ToBigInt::to_bigint(&1234)); assert_eq!(BigInt::parse_bytes(b"ABCD", 16), ToBigInt::to_bigint(&0xABCD)); assert_eq!(BigInt::parse_bytes(b"G", 16), None); }

use num::bigint::{BigInt, ToBigInt};

assert_eq!(BigInt::parse_bytes(b"1234", 10), ToBigInt::to_bigint(&1234));
assert_eq!(BigInt::parse_bytes(b"ABCD", 16), ToBigInt::to_bigint(&0xABCD));
assert_eq!(BigInt::parse_bytes(b"G", 16), None);