Struct BlockHeader 

pub struct BlockHeader {
    pub magic: [u8; 4],
    pub compression: u8,
    pub original_size: u32,
    pub compressed_size: u32,
    pub checksum: u32,
}

Block header in payload store (Task 1: Fixed 17-byte layout)

Layout (all integers little-endian):

Offset  Size  Field            
0       4     magic = "TBLK"   
4       1     compression      
5       4     original_size    
9       4     compressed_size  
13      4     checksum (CRC32)
Total: 17 bytes

Fields

magic: [u8; 4]

Magic bytes

compression: u8

Compression type

original_size: u32

Original size

compressed_size: u32

Compressed size

checksum: u32

CRC32 checksum

Implementations

impl BlockHeader

pub const MAGIC: [u8; 4]

pub const SIZE: usize = 17

pub fn to_bytes(&self) -> [u8; 17]

Serialize to fixed 17-byte layout (Task 1: deterministic serialization)

pub fn from_bytes(buf: &[u8]) -> Result<Self>

Deserialize from 17-byte buffer (Task 1: validates magic)

Trait Implementations

impl Clone for BlockHeader

fn clone(&self) -> BlockHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BlockHeader

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

Formats the value using the given formatter.