Struct View

#[repr(C)]
pub struct View {
    pub length: u32,
    pub prefix: u32,
    pub buffer_idx: u32,
    pub offset: u32,
}

A reference to a set of bytes.

If length <= 12, these bytes are inlined over the prefix, buffer_idx and offset fields. If length > 12, these fields specify a slice of a buffer.

Fields

length: u32

The length of the string/bytes.

prefix: u32

First 4 bytes of string/bytes data.

buffer_idx: u32

The buffer index.

offset: u32

The offset into the buffer.

Implementations

impl View

pub const MAX_INLINE_SIZE: u32 = 12u32

pub fn as_u128(self) -> u128

pub unsafe fn new_inline_unchecked(bytes: &[u8]) -> Self

Create a new inline view without verifying the length

Safety

It needs to hold that bytes.len() <= View::MAX_INLINE_SIZE.

pub fn new_inline(bytes: &[u8]) -> Self

Create a new inline view

Panics

Panics if the bytes.len() > View::MAX_INLINE_SIZE.

pub unsafe fn new_noninline_unchecked( bytes: &[u8], buffer_idx: u32, offset: u32, ) -> Self

Create a new inline view

Safety

It needs to hold that bytes.len() > View::MAX_INLINE_SIZE.

pub fn new_from_bytes(bytes: &[u8], buffer_idx: u32, offset: u32) -> Self

pub unsafe fn get_slice_unchecked<'a>( &'a self, buffers: &'a [Buffer<u8>], ) -> &'a [u8]

Constructs a byteslice from this view.

Safety

Assumes that this view is valid for the given buffers.

pub fn extend_with_inlinable_strided( views: &mut Vec<Self>, src: &[u8], width: u8, )

Extend a Vec<View> with inline views slices of src with width.

This tries to use SIMD to optimize the copying and can be massively faster than doing a views.extend(src.chunks_exact(width).map(View::new_inline)).

Panics

This function panics if src.len() is not divisible by width, width > View::MAX_INLINE_SIZE or width == 0.

Trait Implementations

impl Add for View

type Output = View

The resulting type after applying the + operator.

fn add(self, _rhs: Self) -> Self::Output

Performs the + operation.

impl Clone for View

fn clone(&self) -> View

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for View

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

Formats the value using the given formatter.

impl Default for View

fn default() -> View

Returns the “default value” for a type.

impl Display for View

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

Formats the value using the given formatter.

impl From<Bytes16Alignment4> for View

fn from(value: Bytes16Alignment4) -> Self

Converts to this type from the input type.

impl From<View> for Bytes16Alignment4

fn from(value: View) -> Self

Converts to this type from the input type.

impl From<View> for u128

fn from(value: View) -> Self

Converts to this type from the input type.

impl From<u128> for View

fn from(value: u128) -> Self

Converts to this type from the input type.

impl IsNull for View

const HAS_NULLS: bool = false

type Inner = View

fn is_null(&self) -> bool

fn unwrap_inner(self) -> Self::Inner

impl MinMax for View

fn nan_min_lt(&self, _other: &Self) -> bool

fn nan_max_lt(&self, _other: &Self) -> bool

fn min_propagate_nan(self, other: Self) -> Self

fn max_propagate_nan(self, other: Self) -> Self

fn min_ignore_nan(self, other: Self) -> Self

fn max_ignore_nan(self, other: Self) -> Self

impl NativeType for View

const PRIMITIVE: PrimitiveType = PrimitiveType::UInt128

The corresponding variant of PrimitiveType.

type Bytes = [u8; 16]

Type denoting its representation as bytes. This is [u8; N] where N = size_of::<T>.

type AlignedBytes = Bytes16Alignment4

Type denoting its representation as aligned bytes.

fn to_le_bytes(&self) -> Self::Bytes

To bytes in little endian

fn to_be_bytes(&self) -> Self::Bytes

To bytes in big endian

fn from_le_bytes(bytes: Self::Bytes) -> Self

From bytes in little endian

fn from_be_bytes(bytes: Self::Bytes) -> Self

From bytes in big endian

impl PartialEq for View

fn eq(&self, other: &Self) -> 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 TotalEq for View

fn tot_eq(&self, other: &Self) -> bool

fn tot_ne(&self, other: &Self) -> bool

impl TotalOrd for View

fn tot_cmp(&self, _other: &Self) -> Ordering

fn tot_lt(&self, other: &Self) -> bool

fn tot_gt(&self, other: &Self) -> bool

fn tot_le(&self, other: &Self) -> bool

fn tot_ge(&self, other: &Self) -> bool

impl Zero for View

fn zero() -> Self

Returns the additive identity element of Self, 0.

fn is_zero(&self) -> bool

Returns true if self is equal to the additive identity.

fn set_zero(&mut self)

Sets self to the additive identity element of Self, 0.

impl Zeroable for View

fn zeroed() -> Self

Calls zeroed.

impl AlignedBytesCast<Bytes16Alignment4> for View

impl Copy for View

impl Pod for View