Struct Header

pub struct Header {
    pub header_type: [u8; 2],
    pub length: u32,
    pub reserved: u16,
}

Header for TLV records in e2store files

Fields

header_type: [u8; 2]

Record type identifier

length: u32

Length of data following the header

reserved: u16

Reserved field, must be zero

Implementations

impl Header

pub const fn new(header_type: [u8; 2], length: u32) -> Self

Create a new header with the specified type and length

pub fn read<R: Read>(reader: &mut R) -> Result<Option<Self>, E2sError>

Read header from a reader

pub fn write<W: Write>(&self, writer: &mut W) -> Result<()>

Writes the header to the given writer.

Trait Implementations

impl Clone for Header

fn clone(&self) -> Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header

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

Formats the value using the given formatter.

impl Decode for Header

fn is_ssz_fixed_len() -> bool

Returns true if this object has a fixed-length.

fn ssz_fixed_len() -> usize

The number of bytes this object occupies in the fixed-length portion of the SSZ bytes.

fn from_ssz_bytes(bytes: &[u8]) -> Result<Self, DecodeError>

Attempts to decode Self from bytes, returning a DecodeError on failure.

impl Encode for Header

fn is_ssz_fixed_len() -> bool

Returns true if this object has a fixed-length.

fn ssz_fixed_len() -> usize

The number of bytes this object occupies in the fixed-length portion of the SSZ bytes.

fn ssz_bytes_len(&self) -> usize

Returns the size (in bytes) when self is serialized.

fn ssz_append(&self, buf: &mut Vec<u8>)

Append the encoding self to buf.

fn as_ssz_bytes(&self) -> Vec<u8>

Returns the full-form encoding of this object.

impl PartialEq for Header

fn eq(&self, other: &Header) -> 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 Header

impl StructuralPartialEq for Header

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes