Struct Blob

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pub struct Blob { /* private fields */ }

Expand description

A mapped blob containing extents and decompression metadata.

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impl Blob

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pub fn new( extents: Extents, uncompressed_size: u64, compression_info: Option<CompressionInfo>, ) -> Self

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pub fn extents(&self) -> &Extents

Returns the extents mapping logical offsets to device offsets.

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pub fn uncompressed_size(&self) -> u64

Returns the uncompressed size of the blob in bytes.

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pub fn compression_info(&self) -> Option<&CompressionInfo>

Returns decompression metadata if the blob is compressed.

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pub fn read_range( &self, range: Range<u64>, service: &(impl BlockService + ?Sized), dest_buf: impl DataBuffer, )

Streams and decodes the specified uncompressed range into the provided dest_buf.

For uncompressed blobs, both range.start and range.end must be multiples of BLOCK_SIZE. For compressed blobs, range.start must be a multiple of the compression chunk size, and range.end must either be a multiple of the chunk size or equal to uncompressed_size.

Auto Trait Implementations§

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impl UnwindSafe for Blob

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, D> Encode<Ambiguous1, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. Read more

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impl<T, D> Encode<Ambiguous2, D> for T
where D: ResourceDialect,

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unsafe fn encode( self, _encoder: &mut Encoder<'_, D>, _offset: usize, _depth: Depth, ) -> Result<(), Error>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID. 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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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