Struct BooleanBuffer 

pub struct BooleanBuffer {
    buffer: Buffer,
    offset: usize,
    len: usize,
}

A slice-able Buffer containing bit-packed booleans

BooleanBuffers can be creating using BooleanBufferBuilder

See Also

• NullBuffer for representing null values in Arrow arrays

Fields

buffer: Buffer

offset: usize

len: usize

Implementations

impl BooleanBuffer

pub fn new(buffer: Buffer, offset: usize, len: usize) -> BooleanBuffer

Create a new BooleanBuffer from a Buffer, an offset and length in bits

Panics

This method will panic if buffer is not large enough

pub fn new_set(length: usize) -> BooleanBuffer

Create a new BooleanBuffer of length where all values are true

pub fn new_unset(length: usize) -> BooleanBuffer

Create a new BooleanBuffer of length where all values are false

pub fn collect_bool<F>(len: usize, f: F) -> BooleanBuffer

where F: FnMut(usize) -> bool,

Invokes f with indexes 0..len collecting the boolean results into a new BooleanBuffer

pub fn count_set_bits(&self) -> usize

Returns the number of set bits in this buffer

pub fn bit_chunks(&self) -> BitChunks<'_>

Returns a BitChunks instance which can be used to iterate over this buffer’s bits in u64 chunks

pub fn offset(&self) -> usize

Returns the offset of this BooleanBuffer in bits

pub fn len(&self) -> usize

Returns the length of this BooleanBuffer in bits

pub fn is_empty(&self) -> bool

Returns true if this BooleanBuffer is empty

pub fn shrink_to_fit(&mut self)

Free up unused memory.

pub fn value(&self, idx: usize) -> bool

Returns the boolean value at index i.

Panics

Panics if i >= self.len()

pub unsafe fn value_unchecked(&self, i: usize) -> bool

Returns the boolean value at index i.

Safety

This doesn’t check bounds, the caller must ensure that index < self.len()

pub fn values(&self) -> &[u8]

Returns the packed values of this BooleanBuffer not including any offset

pub fn slice(&self, offset: usize, len: usize) -> BooleanBuffer

Slices this BooleanBuffer by the provided offset and length

pub fn sliced(&self) -> Buffer

Returns a Buffer containing the sliced contents of this BooleanBuffer

Equivalent to self.buffer.bit_slice(self.offset, self.len)

pub fn ptr_eq(&self, other: &BooleanBuffer) -> bool

Returns true if this BooleanBuffer is equal to other, using pointer comparisons to determine buffer equality. This is cheaper than PartialEq::eq but may return false when the arrays are logically equal

pub fn inner(&self) -> &Buffer

Returns the inner Buffer

pub fn into_inner(self) -> Buffer

Returns the inner Buffer, consuming self

pub fn iter(&self) -> BitIterator<'_>

Returns an iterator over the bits in this BooleanBuffer

pub fn set_indices(&self) -> BitIndexIterator<'_>

Returns an iterator over the set bit positions in this BooleanBuffer

pub fn set_indices_u32(&self) -> BitIndexU32Iterator<'_>

Returns a u32 iterator over set bit positions without any usize->u32 conversion

pub fn set_slices(&self) -> BitSliceIterator<'_>

Returns a BitSliceIterator yielding contiguous ranges of set bits

Trait Implementations

impl BitAnd<&BooleanBuffer> for &BooleanBuffer

type Output = BooleanBuffer

The resulting type after applying the & operator.

fn bitand( self, rhs: &BooleanBuffer, ) -> <&BooleanBuffer as BitAnd<&BooleanBuffer>>::Output

Performs the & operation.

impl BitOr<&BooleanBuffer> for &BooleanBuffer

type Output = BooleanBuffer

The resulting type after applying the | operator.

fn bitor( self, rhs: &BooleanBuffer, ) -> <&BooleanBuffer as BitOr<&BooleanBuffer>>::Output

Performs the | operation.

impl BitXor<&BooleanBuffer> for &BooleanBuffer

type Output = BooleanBuffer

The resulting type after applying the ^ operator.

fn bitxor( self, rhs: &BooleanBuffer, ) -> <&BooleanBuffer as BitXor<&BooleanBuffer>>::Output

Performs the ^ operation.

impl Clone for BooleanBuffer

fn clone(&self) -> BooleanBuffer

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for BooleanBuffer

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl From<&[bool]> for BooleanBuffer

fn from(value: &[bool]) -> BooleanBuffer

Converts to this type from the input type.

impl<'a> From<&'a BooleanBuffer> for SlicesIterator<'a>

fn from(filter: &'a BooleanBuffer) -> SlicesIterator<'a>

Converts to this type from the input type.

impl From<BooleanBuffer> for BooleanArray

fn from(values: BooleanBuffer) -> BooleanArray

Converts to this type from the input type.

impl From<BooleanBuffer> for NullBuffer

fn from(value: BooleanBuffer) -> NullBuffer

Converts to this type from the input type.

impl From<BooleanBufferBuilder> for BooleanBuffer

fn from(builder: BooleanBufferBuilder) -> BooleanBuffer

Converts to this type from the input type.

impl From<Vec<bool>> for BooleanBuffer

fn from(value: Vec<bool>) -> BooleanBuffer

Converts to this type from the input type.

impl FromIterator<bool> for BooleanBuffer

fn from_iter<T>(iter: T) -> BooleanBuffer

where T: IntoIterator<Item = bool>,

Creates a value from an iterator.

impl<'a> IntoIterator for &'a BooleanBuffer

type Item = bool

The type of the elements being iterated over.

type IntoIter = BitIterator<'a>

Which kind of iterator are we turning this into?

fn into_iter(self) -> <&'a BooleanBuffer as IntoIterator>::IntoIter

Creates an iterator from a value.

impl Not for &BooleanBuffer

type Output = BooleanBuffer

The resulting type after applying the ! operator.

fn not(self) -> <&BooleanBuffer as Not>::Output

Performs the unary ! operation.

impl PartialEq for BooleanBuffer

fn eq(&self, other: &BooleanBuffer) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for BooleanBuffer