Struct ethers::core::k256::ecdsa::signature::rand_core::block::BlockRng64 [−][src]
pub struct BlockRng64<R> where
R: BlockRngCore + ?Sized, {
pub core: R,
// some fields omitted
}
Expand description
A wrapper type implementing RngCore
for some type implementing
BlockRngCore
with u64
array buffer; i.e. this can be used to implement
a full RNG from just a generate
function.
This is similar to BlockRng
, but specialized for algorithms that operate
on u64
values.
No whole generated u64
values are thrown away and all values are consumed
in-order. next_u64
simply takes the next available u64
value.
next_u32
is however a bit special: half of a u64
is consumed, leaving
the other half in the buffer. If the next function called is next_u32
then the other half is then consumed, however both next_u64
and
fill_bytes
discard the rest of any half-consumed u64
s when called.
fill_bytes
and try_fill_bytes
consume a whole number of u64
values. If the requested length is not a multiple of 8, some bytes will be
discarded.
Fields
core: R
The core part of the RNG, implementing the generate
function.
Implementations
Create a new BlockRng
from an existing RNG implementing
BlockRngCore
. Results will be generated on first use.
Get the index into the result buffer.
If this is equal to or larger than the size of the result buffer then
the buffer is “empty” and generate()
must be called to produce new
results.
Reset the number of available results. This will force a new set of results to be generated on next use.
Generate a new set of results immediately, setting the index to the given value.
Trait Implementations
impl<R> Clone for BlockRng64<R> where
R: Clone + BlockRngCore + ?Sized,
<R as BlockRngCore>::Results: Clone,
impl<R> Clone for BlockRng64<R> where
R: Clone + BlockRngCore + ?Sized,
<R as BlockRngCore>::Results: Clone,
impl<R> RngCore for BlockRng64<R> where
R: BlockRngCore<Item = u64>,
<R as BlockRngCore>::Results: AsRef<[u64]>,
<R as BlockRngCore>::Results: AsMut<[u64]>,
impl<R> RngCore for BlockRng64<R> where
R: BlockRngCore<Item = u64>,
<R as BlockRngCore>::Results: AsRef<[u64]>,
<R as BlockRngCore>::Results: AsMut<[u64]>,
type Seed = <R as SeedableRng>::Seed
type Seed = <R as SeedableRng>::Seed
Seed type, which is restricted to types mutably-dereferencable as u8
arrays (we recommend [u8; N]
for some N
). Read more
Create a new PRNG using the given seed. Read more
Create a new PRNG using a u64
seed. Read more
Create a new PRNG seeded from another Rng
. Read more
Auto Trait Implementations
impl<R: ?Sized> RefUnwindSafe for BlockRng64<R> where
R: RefUnwindSafe,
<R as BlockRngCore>::Results: RefUnwindSafe,
impl<R: ?Sized> Send for BlockRng64<R> where
R: Send,
<R as BlockRngCore>::Results: Send,
impl<R: ?Sized> Sync for BlockRng64<R> where
R: Sync,
<R as BlockRngCore>::Results: Sync,
impl<R: ?Sized> Unpin for BlockRng64<R> where
R: Unpin,
<R as BlockRngCore>::Results: Unpin,
impl<R: ?Sized> UnwindSafe for BlockRng64<R> where
R: UnwindSafe,
<R as BlockRngCore>::Results: UnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
Generate a random value in the given range. Read more
Sample a new value, using the given distribution. Read more
fn sample_iter<T, D>(self, distr: D) -> DistIter<D, Self, T>ⓘ where
D: Distribution<T>,
fn sample_iter<T, D>(self, distr: D) -> DistIter<D, Self, T>ⓘ where
D: Distribution<T>,
Create an iterator that generates values using the given distribution. Read more
Return a bool with a probability p
of being true. Read more
Return a bool with a probability of numerator/denominator
of being
true. I.e. gen_ratio(2, 3)
has chance of 2 in 3, or about 67%, of
returning true. If numerator == denominator
, then the returned value
is guaranteed to be true
. If numerator == 0
, then the returned
value is guaranteed to be false
. Read more
pub fn vzip(self) -> V
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more