Struct fuchsia_merkle::MerkleTreeWriter

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pub struct MerkleTreeWriter<W> { /* private fields */ }
Expand description

A MerkleTreeWriter wraps a MerkleTreeBuilder and another type that implements std::io::Write.

MerkleTreeWriters can be used to compute a MerkleTree while streaming data from one location to another. To simply compute a MerkleTree without chaining writes to a separate Writer, see MerkleTreeBuilder.

§Examples

let data = vec![0xff; 8192];
let mut written = Vec::new();
{
    let mut writer = MerkleTreeWriter::new(&mut written);
    writer.write_all(&data)?;
    assert_eq!(
        writer.finish().root(),
        "68d131bc271f9c192d4f6dcd8fe61bef90004856da19d0f2f514a7f4098b0737"
            .parse()
            .unwrap()
    );
}
assert_eq!(written, data);

Implementations§

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impl<W: Write> MerkleTreeWriter<W>

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pub fn new(inner: W) -> Self

Creates a new MerkleTreeWriter

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pub fn finish(self) -> MerkleTree

Finalizes all levels of the merkle tree, converting this MerkleTreeWriter instance into a MerkleTree.

Trait Implementations§

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impl<W: Write> Write for MerkleTreeWriter<W>

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fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written. Read more
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fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
1.36.0 · source§

fn write_vectored(&mut self, bufs: &[IoSlice<'_>]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers. Read more
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fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
1.0.0 · source§

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer. Read more
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fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

fn write_fmt(&mut self, fmt: Arguments<'_>) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

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impl<W> Freeze for MerkleTreeWriter<W>
where W: Freeze,

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impl<W> RefUnwindSafe for MerkleTreeWriter<W>
where W: RefUnwindSafe,

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impl<W> Send for MerkleTreeWriter<W>
where W: Send,

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impl<W> Sync for MerkleTreeWriter<W>
where W: Sync,

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impl<W> Unpin for MerkleTreeWriter<W>
where W: Unpin,

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impl<W> UnwindSafe for MerkleTreeWriter<W>
where W: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.