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feat: remove const generics from cursors and add segment masks (parad…
…igmxyz#5181) Co-authored-by: Alexey Shekhirin <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,105 @@ | ||
| use super::mask::{ColumnSelectorOne, ColumnSelectorThree, ColumnSelectorTwo}; | ||
| use crate::table::Decompress; | ||
| use derive_more::{Deref, DerefMut}; | ||
| use reth_interfaces::{RethError, RethResult}; | ||
| use reth_nippy_jar::{MmapHandle, NippyJar, NippyJarCursor}; | ||
| use reth_primitives::{snapshot::SegmentHeader, B256}; | ||
|
|
||
| /// Cursor of a snapshot segment. | ||
| #[derive(Debug, Deref, DerefMut)] | ||
| pub struct SnapshotCursor<'a>(NippyJarCursor<'a, SegmentHeader>); | ||
|
|
||
| impl<'a> SnapshotCursor<'a> { | ||
| /// Returns a new [`SnapshotCursor`]. | ||
| pub fn new( | ||
| jar: &'a NippyJar<SegmentHeader>, | ||
| mmap_handle: MmapHandle, | ||
| ) -> Result<Self, RethError> { | ||
| Ok(Self(NippyJarCursor::with_handle(jar, mmap_handle)?)) | ||
| } | ||
|
|
||
| /// Gets a row of values. | ||
| pub fn get( | ||
| &mut self, | ||
| key_or_num: KeyOrNumber<'_>, | ||
| mask: usize, | ||
| ) -> RethResult<Option<Vec<&'_ [u8]>>> { | ||
| let row = match key_or_num { | ||
| KeyOrNumber::Key(k) => self.row_by_key_with_cols(k, mask), | ||
| KeyOrNumber::Number(n) => { | ||
| let offset = self.jar().user_header().start(); | ||
| if offset > n { | ||
| return Ok(None) | ||
| } | ||
| self.row_by_number_with_cols((n - offset) as usize, mask) | ||
| } | ||
| }?; | ||
|
|
||
| Ok(row) | ||
| } | ||
|
|
||
| /// Gets one column value from a row. | ||
| pub fn get_one<M: ColumnSelectorOne>( | ||
| &mut self, | ||
| key_or_num: KeyOrNumber<'_>, | ||
| ) -> RethResult<Option<M::FIRST>> { | ||
| let row = self.get(key_or_num, M::MASK)?; | ||
|
|
||
| match row { | ||
| Some(row) => Ok(Some(M::FIRST::decompress(row[0])?)), | ||
| None => Ok(None), | ||
| } | ||
| } | ||
|
|
||
| /// Gets two column values from a row. | ||
| pub fn get_two<M: ColumnSelectorTwo>( | ||
| &mut self, | ||
| key_or_num: KeyOrNumber<'_>, | ||
| ) -> RethResult<Option<(M::FIRST, M::SECOND)>> { | ||
| let row = self.get(key_or_num, M::MASK)?; | ||
|
|
||
| match row { | ||
| Some(row) => Ok(Some((M::FIRST::decompress(row[0])?, M::SECOND::decompress(row[1])?))), | ||
| None => Ok(None), | ||
| } | ||
| } | ||
|
|
||
| /// Gets three column values from a row. | ||
| #[allow(clippy::type_complexity)] | ||
| pub fn get_three<M: ColumnSelectorThree>( | ||
| &mut self, | ||
| key_or_num: KeyOrNumber<'_>, | ||
| ) -> RethResult<Option<(M::FIRST, M::SECOND, M::THIRD)>> { | ||
| let row = self.get(key_or_num, M::MASK)?; | ||
|
|
||
| match row { | ||
| Some(row) => Ok(Some(( | ||
| M::FIRST::decompress(row[0])?, | ||
| M::SECOND::decompress(row[1])?, | ||
| M::THIRD::decompress(row[2])?, | ||
| ))), | ||
| None => Ok(None), | ||
| } | ||
| } | ||
| } | ||
|
|
||
| /// Either a key _or_ a block/tx number | ||
| #[derive(Debug)] | ||
| pub enum KeyOrNumber<'a> { | ||
| /// A slice used as a key. Usually a block/tx hash | ||
| Key(&'a [u8]), | ||
| /// A block/tx number | ||
| Number(u64), | ||
| } | ||
|
|
||
| impl<'a> From<&'a B256> for KeyOrNumber<'a> { | ||
| fn from(value: &'a B256) -> Self { | ||
| KeyOrNumber::Key(value.as_slice()) | ||
| } | ||
| } | ||
|
|
||
| impl<'a> From<u64> for KeyOrNumber<'a> { | ||
| fn from(value: u64) -> Self { | ||
| KeyOrNumber::Number(value) | ||
| } | ||
| } |
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