Trait zksync_bellman::PrimeFieldRepr

pub trait PrimeFieldRepr:
    Sized
    + Copy
    + Clone
    + Eq
    + Ord
    + Send
    + Sync
    + Default
    + Debug
    + Display
    + 'static
    + Rand
    + AsRef<[u64]>
    + AsMut<[u64]>
    + From<u64>
    + Hash
    + Serialize
    + DeserializeOwned {
    // Required methods
    fn sub_noborrow(&mut self, other: &Self);
    fn add_nocarry(&mut self, other: &Self);
    fn num_bits(&self) -> u32;
    fn is_zero(&self) -> bool;
    fn is_odd(&self) -> bool;
    fn is_even(&self) -> bool;
    fn div2(&mut self);
    fn shr(&mut self, amt: u32);
    fn mul2(&mut self);
    fn shl(&mut self, amt: u32);

    // Provided methods
    fn write_be<W>(&self, writer: W) -> Result<(), Error>
       where W: Write { ... }
    fn read_be<R>(&mut self, reader: R) -> Result<(), Error>
       where R: Read { ... }
    fn write_le<W>(&self, writer: W) -> Result<(), Error>
       where W: Write { ... }
    fn read_le<R>(&mut self, reader: R) -> Result<(), Error>
       where R: Read { ... }
}

This trait represents a wrapper around a biginteger which can encode any element of a particular prime field. It is a smart wrapper around a sequence of u64 limbs, least-significant digit first.

Required Methods

fn sub_noborrow(&mut self, other: &Self)

Subtract another represetation from this one.

fn add_nocarry(&mut self, other: &Self)

Add another representation to this one.

fn num_bits(&self) -> u32

Compute the number of bits needed to encode this number. Always a multiple of 64.

fn is_zero(&self) -> bool

Returns true iff this number is zero.

fn is_odd(&self) -> bool

Returns true iff this number is odd.

fn is_even(&self) -> bool

Returns true iff this number is even.

fn div2(&mut self)

Performs a rightwise bitshift of this number, effectively dividing it by 2.

fn shr(&mut self, amt: u32)

Performs a rightwise bitshift of this number by some amount.

fn mul2(&mut self)

Performs a leftwise bitshift of this number, effectively multiplying it by 2. Overflow is ignored.

fn shl(&mut self, amt: u32)

Performs a leftwise bitshift of this number by some amount.

Provided Methods

fn write_be<W>(&self, writer: W) -> Result<(), Error>

where W: Write,

Writes this PrimeFieldRepr as a big endian integer.

fn read_be<R>(&mut self, reader: R) -> Result<(), Error>

where R: Read,

Reads a big endian integer into this representation.

fn write_le<W>(&self, writer: W) -> Result<(), Error>

where W: Write,

Writes this PrimeFieldRepr as a little endian integer.

fn read_le<R>(&mut self, reader: R) -> Result<(), Error>

where R: Read,

Reads a little endian integer into this representation.

Object Safety

This trait is not object safe.

Implementors

impl PrimeFieldRepr for zksync_bellman::bls12_381::FqRepr

impl PrimeFieldRepr for zksync_bellman::bls12_381::FrRepr

impl PrimeFieldRepr for zksync_bellman::compact_bn256::FqRepr

impl PrimeFieldRepr for zksync_bellman::compact_bn256::FrRepr

impl PrimeFieldRepr for zksync_bellman::plonk::transparent_engine::FrRepr