Trait num::PrimInt
[−]
[src]
pub trait PrimInt: Saturating + CheckedAdd<Output = Self> + CheckedSub<Output = Self> + CheckedMul<Output = Self> + CheckedDiv<Output = Self> + Bounded + NumCast + Num + Copy + Not<Output = Self> + BitAnd<Self, Output = Self> + BitOr<Self, Output = Self> + BitXor<Self, Output = Self> + Shl<usize, Output = Self> + Shr<usize, Output = Self> + Eq + Ord + PartialOrd<Self> {
fn count_ones(self) -> u32;
fn count_zeros(self) -> u32;
fn leading_zeros(self) -> u32;
fn trailing_zeros(self) -> u32;
fn rotate_left(self, n: u32) -> Self;
fn rotate_right(self, n: u32) -> Self;
fn signed_shl(self, n: u32) -> Self;
fn signed_shr(self, n: u32) -> Self;
fn unsigned_shl(self, n: u32) -> Self;
fn unsigned_shr(self, n: u32) -> Self;
fn swap_bytes(self) -> Self;
fn from_be(x: Self) -> Self;
fn from_le(x: Self) -> Self;
fn to_be(self) -> Self;
fn to_le(self) -> Self;
fn pow(self, exp: u32) -> Self;
}
Required Methods
fn count_ones(self) -> u32
Returns the number of ones in the binary representation of self.
Examples
use num_traits::PrimInt; let n = 0b01001100u8; assert_eq!(n.count_ones(), 3);
fn count_zeros(self) -> u32
Returns the number of zeros in the binary representation of self.
Examples
use num_traits::PrimInt; let n = 0b01001100u8; assert_eq!(n.count_zeros(), 5);
fn leading_zeros(self) -> u32
Returns the number of leading zeros in the binary representation
of self.
Examples
use num_traits::PrimInt; let n = 0b0101000u16; assert_eq!(n.leading_zeros(), 10);
fn trailing_zeros(self) -> u32
Returns the number of trailing zeros in the binary representation
of self.
Examples
use num_traits::PrimInt; let n = 0b0101000u16; assert_eq!(n.trailing_zeros(), 3);
fn rotate_left(self, n: u32) -> Self
Shifts the bits to the left by a specified amount amount, n, wrapping
the truncated bits to the end of the resulting integer.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; let m = 0x3456789ABCDEF012u64; assert_eq!(n.rotate_left(12), m);
fn rotate_right(self, n: u32) -> Self
Shifts the bits to the right by a specified amount amount, n, wrapping
the truncated bits to the beginning of the resulting integer.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; let m = 0xDEF0123456789ABCu64; assert_eq!(n.rotate_right(12), m);
fn signed_shl(self, n: u32) -> Self
Shifts the bits to the left by a specified amount amount, n, filling
zeros in the least significant bits.
This is bitwise equivalent to signed Shl.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; let m = 0x3456789ABCDEF000u64; assert_eq!(n.signed_shl(12), m);
fn signed_shr(self, n: u32) -> Self
Shifts the bits to the right by a specified amount amount, n, copying
the "sign bit" in the most significant bits even for unsigned types.
This is bitwise equivalent to signed Shr.
Examples
use num_traits::PrimInt; let n = 0xFEDCBA9876543210u64; let m = 0xFFFFEDCBA9876543u64; assert_eq!(n.signed_shr(12), m);
fn unsigned_shl(self, n: u32) -> Self
Shifts the bits to the left by a specified amount amount, n, filling
zeros in the least significant bits.
This is bitwise equivalent to unsigned Shl.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFi64; let m = 0x3456789ABCDEF000i64; assert_eq!(n.unsigned_shl(12), m);
fn unsigned_shr(self, n: u32) -> Self
Shifts the bits to the right by a specified amount amount, n, filling
zeros in the most significant bits.
This is bitwise equivalent to unsigned Shr.
Examples
use num_traits::PrimInt; let n = 0xFEDCBA9876543210i64; let m = 0x000FEDCBA9876543i64; assert_eq!(n.unsigned_shr(12), m);
fn swap_bytes(self) -> Self
Reverses the byte order of the integer.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; let m = 0xEFCDAB8967452301u64; assert_eq!(n.swap_bytes(), m);
fn from_be(x: Self) -> Self
Convert an integer from big endian to the target's endianness.
On big endian this is a no-op. On little endian the bytes are swapped.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "big") { assert_eq!(u64::from_be(n), n) } else { assert_eq!(u64::from_be(n), n.swap_bytes()) }
fn from_le(x: Self) -> Self
Convert an integer from little endian to the target's endianness.
On little endian this is a no-op. On big endian the bytes are swapped.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "little") { assert_eq!(u64::from_le(n), n) } else { assert_eq!(u64::from_le(n), n.swap_bytes()) }
fn to_be(self) -> Self
Convert self to big endian from the target's endianness.
On big endian this is a no-op. On little endian the bytes are swapped.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "big") { assert_eq!(n.to_be(), n) } else { assert_eq!(n.to_be(), n.swap_bytes()) }
fn to_le(self) -> Self
Convert self to little endian from the target's endianness.
On little endian this is a no-op. On big endian the bytes are swapped.
Examples
use num_traits::PrimInt; let n = 0x0123456789ABCDEFu64; if cfg!(target_endian = "little") { assert_eq!(n.to_le(), n) } else { assert_eq!(n.to_le(), n.swap_bytes()) }
fn pow(self, exp: u32) -> Self
Raises self to the power of exp, using exponentiation by squaring.
Examples
use num_traits::PrimInt; assert_eq!(2i32.pow(4), 16);