Enum Mapper

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pub enum Mapper<'l> {
    Heap {
        write_cursor: (u64, usize),
        mapper: Vec<Section<'l>>,
    },
    Disk,
}
Expand description

The mapper that holds all the writes to the layer and their location mapping in the database

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Heap

A read-write version of the mapper on the heap

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§write_cursor: (u64, usize)

The current write cursor to speed up sequential qrites

§mapper: Vec<Section<'l>>

self explainitory

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Disk

A read-only version of the mapper on the disk

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impl<'l> Mapper<'l>

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pub fn new() -> Self

Creates a new heap-based mapper

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pub fn get_writer( &mut self, ) -> Result<(&mut Vec<Section<'l>>, &mut (u64, usize)), Error>

Grabs the internal heap representation; if on disk, throw the ReadOnly error

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pub fn iter<'a, Stream: Read + Write + Seek>( &'a self, stream: &'a mut Stream, size: u64, cursor: u64, ) -> Result<MapperIter<'a, Stream>, Error>

Generates an iterator over the interal mapper, from the stream, size and layer read cursor position

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impl<'l> Debug for Mapper<'l>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'l> Default for Mapper<'l>

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fn default() -> Self

Returns the “default value” for a type. Read more

Auto Trait Implementations§

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impl<'l> Freeze for Mapper<'l>

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impl<'l> RefUnwindSafe for Mapper<'l>

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impl<'l> Send for Mapper<'l>

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impl<'l> Sync for Mapper<'l>

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impl<'l> Unpin for Mapper<'l>

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impl<'l> UnwindSafe for Mapper<'l>

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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.