Struct Header06 

pub struct Header06 {

    pub flags: u8,
    pub content_hash: [u8; 16],
    pub file_len: u64,
    pub root_len: u32,
    pub card_region_len: u32,
    pub data_offset: u64,
    pub quad_count: u64,
    pub term_count: u64,
    pub graph_count: u64,
    pub perm_mask: u8,
    pub dict_codec: u8,
    pub block_codec: u8,
    pub internal_codec: u8,
    pub pyramid_levels: u16,
    pub id_widths: u8,
    pub presence: u16,
    pub card_off: u32,
    pub card_len: u32,
    pub card_digest: [u8; 16],
    pub build_off: u32,
    pub build_len: u32,
    pub root_digest: [u8; 16],
}

The parsed 128-byte header.

Fields

flags: u8

content_hash: [u8; 16]

file_len: u64

root_len: u32

card_region_len: u32

data_offset: u64

quad_count: u64

term_count: u64

graph_count: u64

perm_mask: u8

dict_codec: u8

block_codec: u8

internal_codec: u8

pyramid_levels: u16

id_widths: u8

Per-position term-id widths, 2 bits each (subjects, objects, predicates, graphs from the low bits): 0 = u32, 1 = u64 (refused by this reader).

presence: u16

card_off: u32

card_len: u32

card_digest: [u8; 16]

build_off: u32

build_len: u32

root_digest: [u8; 16]

Implementations

impl Header06

pub fn to_bytes(&self) -> [u8; 128]

Serialize the fixed 128 bytes.

pub fn from_bytes(b: &[u8]) -> Result<Header06, FileError>

Parse and bounds-check the fixed 128 bytes. Every field is untrusted.

pub fn root_offset(&self) -> u64

Absolute offset of the root block.

pub fn card_region_offset(&self) -> u64

Absolute offset of the card region.

pub fn front_base(&self) -> u64

Absolute offset where the front sections start (after the card region).

pub fn card_range(&self) -> ByteRange

The stored card’s absolute range (len == 0: no card).

pub fn build_range(&self) -> ByteRange

The build record’s absolute range (len == 0: none).

pub fn perms(&self) -> PermSet

The permutations the file carries.

pub fn has(&self, bit: u16) -> bool

Does the file carry this presence bit?

Trait Implementations

impl Clone for Header06

fn clone(&self) -> Header06

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Header06

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

Formats the value using the given formatter.

impl Default for Header06

fn default() -> Header06

Returns the “default value” for a type.

impl Eq for Header06

impl PartialEq for Header06

fn eq(&self, other: &Header06) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Header06