Struct FileHeader 

pub struct FileHeader {
    pub header_size: u8,
    pub protocol_version: u8,
    pub profile_version: u16,
    pub data_size: u32,
    pub header_crc: Option<u16>,
}

Parsed FIT file header.

Fields

header_size: u8

Either 12 or 14.

protocol_version: u8

Protocol version byte (high nibble = major, low = minor).

profile_version: u16

Profile version (e.g. 21200 = v21.200).

data_size: u32

Number of bytes in the records area (between header and trailing file CRC).

header_crc: Option<u16>

Header CRC, only present when header_size == 14. A stored value of Some(0) means “skip verification” (legacy firmware).

Implementations

impl FileHeader

pub const SIGNATURE: [u8; 4]

The four-byte ASCII signature at offset 8..12.

pub const MIN_SIZE: u8 = 12

Smallest valid header size.

pub const MAX_SIZE: u8 = 14

Largest valid header size.

pub fn parse(bytes: &[u8]) -> Result<Self, FitError>

Parse a header from the start of bytes.

The slice must hold at least header_size bytes (12 or 14). The signature .FIT is verified. The header CRC is not verified here; see crate::check_integrity for full validation.

pub fn total_file_size(&self) -> usize

Total expected file size: header + data + 2-byte trailing file CRC.

pub fn file_crc_offset(&self) -> usize

Byte offset where the trailing file CRC begins.

Trait Implementations

impl Clone for FileHeader

fn clone(&self) -> FileHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileHeader

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

Formats the value using the given formatter.

impl PartialEq for FileHeader

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

impl Eq for FileHeader

impl StructuralPartialEq for FileHeader