Struct AprV2Header 

#[repr(C)]
pub struct AprV2Header {
    pub magic: [u8; 4],
    pub version: (u8, u8),
    pub flags: AprV2Flags,
    pub tensor_count: u32,
    pub metadata_offset: u64,
    pub metadata_size: u32,
    pub tensor_index_offset: u64,
    pub data_offset: u64,
    pub checksum: u32,
    pub reserved: [u8; 20],
}

APR file header (64 bytes)

Fields

magic: [u8; 4]

Magic number (“APR\0”) - ONE format, no versioning

version: (u8, u8)

Format version (major, minor)

flags: AprV2Flags

Feature flags

tensor_count: u32

Number of tensors

metadata_offset: u64

Offset to JSON metadata section

metadata_size: u32

Size of metadata in bytes

tensor_index_offset: u64

Offset to tensor index

data_offset: u64

Offset to tensor data

checksum: u32

Header checksum (CRC32)

reserved: [u8; 20]

Reserved for future use (zero-padded)

Implementations

impl AprV2Header

pub fn new() -> Self

Create new v2 header with defaults

pub fn is_valid(&self) -> bool

Check if header has valid magic number

pub fn to_bytes(&self) -> [u8; 64]

Serialize header to bytes

pub fn from_bytes(buf: &[u8]) -> Result<Self, V2FormatError>

Deserialize header from bytes

Errors

Returns error if buffer is too small or magic is invalid.

pub fn compute_checksum(&self) -> u32

Compute header checksum (CRC32 of header bytes excluding checksum field)

pub fn update_checksum(&mut self)

Update checksum field

pub fn verify_checksum(&self) -> bool

Verify header checksum

Trait Implementations

impl Clone for AprV2Header

fn clone(&self) -> AprV2Header

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AprV2Header

impl Debug for AprV2Header

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

Formats the value using the given formatter.

impl Default for AprV2Header

fn default() -> Self

Returns the “default value” for a type.