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utils.rs
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utils.rs
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use super::super::utils::Pushable;
/// A [`Pushable`] for fixed sized binary data
#[derive(Debug)]
pub struct FixedSizeBinary {
pub values: Vec<u8>,
pub size: usize,
}
impl FixedSizeBinary {
#[inline]
pub fn with_capacity(capacity: usize, size: usize) -> Self {
Self {
values: Vec::with_capacity(capacity * size),
size,
}
}
#[inline]
pub fn push(&mut self, value: &[u8]) {
debug_assert_eq!(value.len(), self.size);
self.values.extend(value);
}
#[inline]
pub fn extend_constant(&mut self, additional: usize) {
self.values
.resize(self.values.len() + additional * self.size, 0);
}
}
impl<'a> Pushable<&'a [u8]> for FixedSizeBinary {
#[inline]
fn reserve(&mut self, additional: usize) {
self.values.reserve(additional * self.size);
}
#[inline]
fn push(&mut self, value: &[u8]) {
debug_assert_eq!(value.len(), self.size);
self.push(value);
}
#[inline]
fn push_null(&mut self) {
self.values.extend(std::iter::repeat(0).take(self.size))
}
#[inline]
fn extend_constant(&mut self, additional: usize, value: &[u8]) {
assert_eq!(value.len(), 0);
self.extend_constant(additional)
}
#[inline]
fn len(&self) -> usize {
self.values.len() / self.size
}
}