Trait BitOps 

pub trait BitOps {
    // Required methods
    fn bits_precision(&self) -> u32;
    fn bytes_precision(&self) -> usize;
    fn bit(&self, index: u32) -> Choice;
    fn set_bit(&mut self, index: u32, bit_value: Choice);
    fn trailing_zeros(&self) -> u32;
    fn trailing_ones(&self) -> u32;
    fn leading_zeros(&self) -> u32;
    fn bit_vartime(&self, index: u32) -> bool;
    fn set_bit_vartime(&mut self, index: u32, bit_value: bool);

    // Provided methods
    fn log2_bits(&self) -> u32 { ... }
    fn bits(&self) -> u32 { ... }
    fn bits_vartime(&self) -> u32 { ... }
    fn leading_zeros_vartime(&self) -> u32 { ... }
    fn trailing_zeros_vartime(&self) -> u32 { ... }
    fn trailing_ones_vartime(&self) -> u32 { ... }
}

Bit counting and bit operations.

Required Methods

fn bits_precision(&self) -> u32

Precision of this integer in bits.

fn bytes_precision(&self) -> usize

Precision of this integer in bytes.

fn bit(&self, index: u32) -> Choice

Get the value of the bit at position index, as a truthy or falsy Choice. Returns the falsy value for indices out of range.

fn set_bit(&mut self, index: u32, bit_value: Choice)

Sets the bit at index to 0 or 1 depending on the value of bit_value.

fn trailing_zeros(&self) -> u32

Calculate the number of trailing zeros in the binary representation of this number.

fn trailing_ones(&self) -> u32

Calculate the number of trailing ones in the binary representation of this number.

fn leading_zeros(&self) -> u32

Calculate the number of leading zeros in the binary representation of this number.

fn bit_vartime(&self, index: u32) -> bool

Returns true if the bit at position index is set, false otherwise.

Remarks

This operation is variable time with respect to index only.

fn set_bit_vartime(&mut self, index: u32, bit_value: bool)

Sets the bit at index to 0 or 1 depending on the value of bit_value, variable time in self.

Provided Methods

fn log2_bits(&self) -> u32

floor(log2(self.bits_precision())).

fn bits(&self) -> u32

Calculate the number of bits required to represent a given number.

fn bits_vartime(&self) -> u32

Calculate the number of bits required to represent a given number in variable-time with respect to self.

fn leading_zeros_vartime(&self) -> u32

Calculate the number of leading zeros in the binary representation of this number.

fn trailing_zeros_vartime(&self) -> u32

Calculate the number of trailing zeros in the binary representation of this number in variable-time with respect to self.

fn trailing_ones_vartime(&self) -> u32

Calculate the number of trailing ones in the binary representation of this number, variable time in self.

Implementors

impl BitOps for BoxedUint

Available on crate feature alloc only.

impl BitOps for Limb

impl BitOps for UintRef

impl<const LIMBS: usize> BitOps for Uint<LIMBS>