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use crate::matrix::DenseBinaryMatrix;
use crate::octet::Octet;
use crate::sparse_vec::SparseBinaryVec;
#[derive(Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Hash)]
pub struct ClonedOctetIter {
sparse: bool,
end_col: usize,
dense_elements: Option<Vec<u64>>,
dense_index: usize,
dense_word_index: usize,
dense_bit_index: usize,
sparse_elements: Option<Vec<(usize, Octet)>>,
sparse_index: usize,
}
impl Iterator for ClonedOctetIter {
type Item = (usize, Octet);
fn next(&mut self) -> Option<Self::Item> {
if self.sparse {
let elements = self.sparse_elements.as_ref().unwrap();
if self.sparse_index == elements.len() {
return None;
} else {
let old_index = self.sparse_index;
self.sparse_index += 1;
return Some(elements[old_index].clone());
}
} else if self.dense_index == self.end_col {
return None;
} else {
let old_index = self.dense_index;
let value = if self.dense_elements.as_ref().unwrap()[self.dense_word_index]
& DenseBinaryMatrix::select_mask(self.dense_bit_index)
== 0
{
Octet::zero()
} else {
Octet::one()
};
self.dense_index += 1;
self.dense_bit_index += 1;
if self.dense_bit_index == 64 {
self.dense_bit_index = 0;
self.dense_word_index += 1;
}
return Some((old_index, value));
}
}
}
#[derive(Clone, Debug, PartialEq, PartialOrd, Eq, Ord, Hash)]
pub struct OctetIter<'a> {
sparse: bool,
start_col: usize,
end_col: usize,
dense_elements: Option<&'a [u64]>,
dense_index: usize,
dense_word_index: usize,
dense_bit_index: usize,
sparse_elements: Option<&'a SparseBinaryVec>,
sparse_index: usize,
sparse_physical_col_to_logical: Option<&'a [u16]>,
}
impl<'a> OctetIter<'a> {
pub fn new_sparse(
start_col: usize,
end_col: usize,
sparse_elements: &'a SparseBinaryVec,
sparse_physical_col_to_logical: &'a [u16],
) -> OctetIter<'a> {
OctetIter {
sparse: true,
start_col,
end_col,
dense_elements: None,
dense_index: 0,
dense_word_index: 0,
dense_bit_index: 0,
sparse_elements: Some(sparse_elements),
sparse_index: 0,
sparse_physical_col_to_logical: Some(sparse_physical_col_to_logical),
}
}
#[allow(clippy::ptr_arg)]
pub fn new_dense_binary(
start_col: usize,
end_col: usize,
start_bit: usize,
dense_elements: &'a [u64],
) -> OctetIter<'a> {
OctetIter {
sparse: false,
start_col: 0,
end_col,
dense_elements: Some(dense_elements),
dense_index: start_col,
dense_word_index: 0,
dense_bit_index: start_bit,
sparse_elements: None,
sparse_index: 0,
sparse_physical_col_to_logical: None,
}
}
pub fn clone(&self) -> ClonedOctetIter {
let sparse_elements = self.sparse_elements.map(|x| {
x.keys_values()
.map(|(physical_col, value)| {
(
self.sparse_physical_col_to_logical.unwrap()[physical_col] as usize,
value,
)
})
.filter(|(logical_col, _)| {
*logical_col >= self.start_col && *logical_col < self.end_col
})
.collect()
});
ClonedOctetIter {
sparse: self.sparse,
end_col: self.end_col,
dense_elements: self.dense_elements.map(|x| x.to_vec()),
dense_index: self.dense_index,
dense_word_index: self.dense_word_index,
dense_bit_index: self.dense_bit_index,
sparse_elements,
sparse_index: self.sparse_index,
}
}
}
impl<'a> Iterator for OctetIter<'a> {
type Item = (usize, Octet);
fn next(&mut self) -> Option<Self::Item> {
if self.sparse {
let elements = self.sparse_elements.unwrap();
if self.sparse_index >= elements.len() {
return None;
} else {
while self.sparse_index < elements.len() {
let entry = elements.get_by_raw_index(self.sparse_index);
self.sparse_index += 1;
let logical_col = self.sparse_physical_col_to_logical.unwrap()[entry.0];
if logical_col >= self.start_col as u16 && logical_col < self.end_col as u16 {
return Some((logical_col as usize, entry.1));
}
}
return None;
}
} else if self.dense_index == self.end_col {
return None;
} else {
let old_index = self.dense_index;
self.dense_index += 1;
let value = if self.dense_elements.unwrap()[self.dense_word_index]
& DenseBinaryMatrix::select_mask(self.dense_bit_index)
== 0
{
Octet::zero()
} else {
Octet::one()
};
self.dense_bit_index += 1;
if self.dense_bit_index == 64 {
self.dense_bit_index = 0;
self.dense_word_index += 1;
}
return Some((old_index, value));
}
}
}