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chore: Remove the DocIndexes type

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This commit is contained in:
Clément Renault 2019-04-26 15:31:00 +02:00
parent db031a5b95
commit 27ffcaabe9
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2 changed files with 0 additions and 242 deletions
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231
meilidb-core/src/data/doc_indexes.rs
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@ -1,231 +0,0 @@
use std::io::{self, Write};
use std::slice::from_raw_parts;
use std::mem::size_of;
use std::ops::Index;
use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
use sdset::Set;
use crate::shared_data_cursor::{SharedDataCursor, FromSharedDataCursor};
use crate::write_to_bytes::WriteToBytes;
use crate::data::SharedData;
use crate::DocIndex;
use super::into_u8_slice;
#[derive(Debug)]
#[repr(C)]
struct Range {
start: u64,
end: u64,
}
#[derive(Clone, Default)]
pub struct DocIndexes {
ranges: SharedData,
indexes: SharedData,
}
impl DocIndexes {
pub fn get(&self, index: usize) -> Option<&Set<DocIndex>> {
self.ranges().get(index).map(|Range { start, end }| {
let start = *start as usize;
let end = *end as usize;
let slice = &self.indexes()[start..end];
Set::new_unchecked(slice)
})
}
fn ranges(&self) -> &[Range] {
let slice = &self.ranges;
let ptr = slice.as_ptr() as *const Range;
let len = slice.len() / size_of::<Range>();
unsafe { from_raw_parts(ptr, len) }
}
fn indexes(&self) -> &[DocIndex] {
let slice = &self.indexes;
let ptr = slice.as_ptr() as *const DocIndex;
let len = slice.len() / size_of::<DocIndex>();
unsafe { from_raw_parts(ptr, len) }
}
}
impl Index<usize> for DocIndexes {
type Output = [DocIndex];
fn index(&self, index: usize) -> &Self::Output {
match self.get(index) {
Some(indexes) => indexes,
None => panic!("index {} out of range for a maximum of {} ranges", index, self.ranges().len()),
}
}
}
impl FromSharedDataCursor for DocIndexes {
type Error = io::Error;
fn from_shared_data_cursor(cursor: &mut SharedDataCursor) -> Result<DocIndexes, Self::Error> {
let len = cursor.read_u64::<LittleEndian>()? as usize;
let ranges = cursor.extract(len);
let len = cursor.read_u64::<LittleEndian>()? as usize;
let indexes = cursor.extract(len);
Ok(DocIndexes { ranges, indexes })
}
}
impl WriteToBytes for DocIndexes {
fn write_to_bytes(&self, bytes: &mut Vec<u8>) {
let ranges_len = self.ranges.len() as u64;
let _ = bytes.write_u64::<LittleEndian>(ranges_len);
bytes.extend_from_slice(&self.ranges);
let indexes_len = self.indexes.len() as u64;
let _ = bytes.write_u64::<LittleEndian>(indexes_len);
bytes.extend_from_slice(&self.indexes);
}
}
pub struct DocIndexesBuilder<W> {
ranges: Vec<Range>,
indexes: Vec<DocIndex>,
wtr: W,
}
impl DocIndexesBuilder<Vec<u8>> {
pub fn memory() -> Self {
DocIndexesBuilder {
ranges: Vec::new(),
indexes: Vec::new(),
wtr: Vec::new(),
}
}
}
impl<W: Write> DocIndexesBuilder<W> {
pub fn new(wtr: W) -> Self {
DocIndexesBuilder {
ranges: Vec::new(),
indexes: Vec::new(),
wtr: wtr,
}
}
pub fn insert(&mut self, indexes: &Set<DocIndex>) {
let len = indexes.len() as u64;
let start = self.ranges.last().map(|r| r.end).unwrap_or(0);
let range = Range { start, end: start + len };
self.ranges.push(range);
self.indexes.extend_from_slice(indexes);
}
pub fn finish(self) -> io::Result<()> {
self.into_inner().map(drop)
}
pub fn into_inner(mut self) -> io::Result<W> {
let ranges = unsafe { into_u8_slice(&self.ranges) };
let len = ranges.len() as u64;
self.wtr.write_u64::<LittleEndian>(len)?;
self.wtr.write_all(ranges)?;
let indexes = unsafe { into_u8_slice(&self.indexes) };
let len = indexes.len() as u64;
self.wtr.write_u64::<LittleEndian>(len)?;
self.wtr.write_all(indexes)?;
Ok(self.wtr)
}
}
#[cfg(test)]
mod tests {
use std::error::Error;
use crate::DocumentId;
use super::*;
#[test]
fn builder_serialize_deserialize() -> Result<(), Box<Error>> {
let a = DocIndex {
document_id: DocumentId(0),
attribute: 3,
word_index: 11,
char_index: 30,
char_length: 4,
};
let b = DocIndex {
document_id: DocumentId(1),
attribute: 4,
word_index: 21,
char_index: 35,
char_length: 6,
};
let c = DocIndex {
document_id: DocumentId(2),
attribute: 8,
word_index: 2,
char_index: 89,
char_length: 6,
};
let mut builder = DocIndexesBuilder::memory();
builder.insert(Set::new(&[a])?);
builder.insert(Set::new(&[a, b, c])?);
builder.insert(Set::new(&[a, c])?);
let bytes = builder.into_inner()?;
let docs = DocIndexes::from_bytes(bytes)?;
assert_eq!(docs.get(0), Some(Set::new(&[a])?));
assert_eq!(docs.get(1), Some(Set::new(&[a, b, c])?));
assert_eq!(docs.get(2), Some(Set::new(&[a, c])?));
assert_eq!(docs.get(3), None);
Ok(())
}
#[test]
fn serialize_deserialize() -> Result<(), Box<Error>> {
let a = DocIndex {
document_id: DocumentId(0),
attribute: 3,
word_index: 11,
char_index: 30,
char_length: 4,
};
let b = DocIndex {
document_id: DocumentId(1),
attribute: 4,
word_index: 21,
char_index: 35,
char_length: 6,
};
let c = DocIndex {
document_id: DocumentId(2),
attribute: 8,
word_index: 2,
char_index: 89,
char_length: 6,
};
let mut builder = DocIndexesBuilder::memory();
builder.insert(Set::new(&[a])?);
builder.insert(Set::new(&[a, b, c])?);
builder.insert(Set::new(&[a, c])?);
let builder_bytes = builder.into_inner()?;
let docs = DocIndexes::from_bytes(builder_bytes.clone())?;
let mut bytes = Vec::new();
docs.write_to_bytes(&mut bytes);
assert_eq!(builder_bytes, bytes);
Ok(())
}
}

11
meilidb-core/src/data/mod.rs
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@ -1,14 +1,3 @@
mod doc_indexes;
mod shared_data; mod shared_data;
use std::slice::from_raw_parts;
use std::mem::size_of;
pub use self::doc_indexes::{DocIndexes, DocIndexesBuilder};
pub use self::shared_data::SharedData; pub use self::shared_data::SharedData;
unsafe fn into_u8_slice<T: Sized>(slice: &[T]) -> &[u8] {
let ptr = slice.as_ptr() as *const u8;
let len = slice.len() * size_of::<T>();
from_raw_parts(ptr, len)
}