Struct RdwHeader 

pub struct RdwHeader { /* private fields */ }

Parsed RDW header (length + reserved).

A 4-byte Record Descriptor Word containing a 2-byte big-endian payload length and 2 reserved bytes.

Examples

use copybook_rdw::RdwHeader;

let header = RdwHeader::from_bytes([0x00, 0x50, 0x00, 0x00]);
assert_eq!(header.length(), 80);
assert_eq!(header.reserved(), 0);

Implementations

impl RdwHeader

pub const fn from_bytes(bytes: [u8; 4]) -> Self

Construct from raw 4-byte header bytes.

pub fn from_payload_len(payload_len: usize, reserved: u16) -> Result<Self>

Construct from payload length and reserved bytes.

Errors

Returns CBKF102_RECORD_LENGTH_INVALID when payload_len > u16::MAX.

pub const fn bytes(self) -> [u8; 4]

Return raw bytes.

pub const fn length(self) -> u16

Extract payload length.

pub const fn reserved(self) -> u16

Extract reserved bytes.

pub const fn looks_ascii_corrupt(self) -> bool

ASCII-corruption heuristic for the length bytes.

Returns true when both length bytes look like ASCII digits.

Trait Implementations

impl Clone for RdwHeader

fn clone(&self) -> RdwHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RdwHeader

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

Formats the value using the given formatter.

impl PartialEq for RdwHeader

fn eq(&self, other: &RdwHeader) -> 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 Copy for RdwHeader

impl Eq for RdwHeader

impl StructuralPartialEq for RdwHeader