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bloom filter cleanup

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debris 2015-11-28 20:00:14 +01:00
parent faf174c245
commit addd1e5ffd
1 changed files with 26 additions and 29 deletions
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55
src/chainfilter.rs
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@ -105,40 +105,37 @@ impl<'a, D> ChainFilter<'a, D> where D: FilterDataSource
/// TODO: optimize it, maybe non-recursive version?
/// TODO: clean up?
fn blocks(&self, bloom: &H2048, from_block: usize, to_block: usize, level: u8, offset: usize) -> Vec<usize> {
let mut result = vec![];
let index = self.bloom_index(offset, level);
match self.data_source.bloom_at_index(&index) {
None => (),
let contains = match self.data_source.bloom_at_index(&index) {
None => false,
Some(level_bloom) => match level {
0 => {
// to_block exclusive
if offset < to_block {
result.push(offset);
}
},
_ => match level_bloom.contains(bloom) {
false => (),
true => {
let level_size = self.level_size(level - 1);
let from_index = self.bloom_index(from_block, level - 1);
let to_index = self.bloom_index(to_block, level - 1);
let res: Vec<usize> = self.lower_level_bloom_indexes(&index).into_iter()
// chose only blooms in range
.filter(|li| li.index >= from_index.index && li.index <= to_index.index)
// map them to offsets
.map(|li| li.index * level_size)
// get all blocks that may contain our bloom
.map(|off| self.blocks(bloom, from_block, to_block, level - 1, off))
// flatten nested structure
.flat_map(|v| v)
.collect();
return res
}
}
// if we are on the lowest level
// take the value, exclude to_block
0 if offset < to_block => return vec![offset],
0 => false,
_ => level_bloom.contains(bloom)
}
};
if contains {
let level_size = self.level_size(level - 1);
let from_index = self.bloom_index(from_block, level - 1);
let to_index = self.bloom_index(to_block, level - 1);
let res: Vec<usize> = self.lower_level_bloom_indexes(&index).into_iter()
// chose only blooms in range
.filter(|li| li.index >= from_index.index && li.index <= to_index.index)
// map them to offsets
.map(|li| li.index * level_size)
// get all blocks that may contain our bloom
.map(|off| self.blocks(bloom, from_block, to_block, level - 1, off))
// flatten nested structure
.flat_map(|v| v)
.collect();
return res
}
result
return vec![];
}
}