Struct ObjPhys 

#[non_exhaustive]
pub struct ObjPhys {
    pub cksum: u64,
    pub oid: u64,
    pub xid: u64,
    pub obj_type_raw: u32,
    pub subtype: u32,
}

A parsed object header.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

cksum: u64

Stored Fletcher-64 checksum (o_cksum).

oid: u64

Object identifier (o_oid) — for a physical object, its block address.

xid: u64

Transaction identifier (o_xid).

obj_type_raw: u32

Raw o_type (type + storage/flag bits).

subtype: u32

o_subtype.

Implementations

impl ObjPhys

pub fn parse(block: &[u8]) -> Option<Self>

Parse a header from the start of block. Bounds-checked; returns None if the slice is too short (never panics).

Layout (Apple obj_phys_t, little-endian on disk): o_cksum[8] @0, o_oid u64 @8, o_xid u64 @16, o_type u32 @24, o_subtype u32 @28.

pub fn obj_type(&self) -> u16

The object type after masking off storage/flag bits (o_type & OBJECT_TYPE_MASK).

Trait Implementations

impl Clone for ObjPhys

fn clone(&self) -> ObjPhys

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ObjPhys

impl Debug for ObjPhys

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

Formats the value using the given formatter.