Struct Header 

pub struct Header { /* private fields */ }

Thin wrapper around htsvcf_core::Header for use in V8.

This delegates all VCF header logic to the core Header and adds only V8-specific functionality (GC integration, JS bindings).

Implementations

impl Header

pub unsafe fn new(ptr: *mut bcf_hdr_t) -> Self

Create a Header from a raw bcf_hdr_t pointer.

Safety

The pointer must be valid. The core Header will duplicate and own the memory.

pub fn header_records(&self) -> Vec<HeaderRecord>

Return parsed header records.

pub fn info_type(&self, tag: &[u8]) -> Option<(TagType, TagLength)>

Get INFO tag type/length from the header.

pub fn format_type(&self, tag: &[u8]) -> Option<(TagType, TagLength)>

Get FORMAT tag type/length from the header.

pub fn sample_id(&self, sample: &[u8]) -> Option<usize>

Get sample ID (index) from sample name.

pub fn id_to_name(&self, id: u32) -> Vec<u8>

Get tag name from numeric ID.

pub fn id_to_name_cached(&self, id: u32) -> (String, Vec<u8>)

Get the cached name for a tag ID, returning both the String and bytes.

pub fn sample_count(&self) -> usize

Get the number of samples in the header.

pub fn sample_names(&self) -> &[String]

Get all sample names as strings.

pub fn sample_idx(&self, name: &str) -> Option<usize>

Get the index of a sample by name, or None if not found.

pub fn sample_name_to_idx(&self) -> &HashMap<String, usize>

Get a reference to the sample name-to-index map.

pub fn push_record(&self, record: &[u8]) -> bool

Append a raw header line (e.g. ##INFO=...).

pub fn add_info( &self, id: &str, number: &str, ty: &str, description: &str, ) -> bool

Add an ##INFO header line.

pub fn add_format( &self, id: &str, number: &str, ty: &str, description: &str, ) -> bool

Add a ##FORMAT header line.

pub fn to_string(&self) -> Option<String>

Format header as string.

pub fn inner(&self) -> &Header

Get a reference to the inner core Header.

Trait Implementations

impl Debug for Header

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

Formats the value using the given formatter.

impl GarbageCollected for Header

fn trace(&self, _visitor: &mut Visitor)

No-op trace because Header does not reference other GC objects.

fn get_name(&self) -> &'static CStr

Class name shown in V8 heap snapshots.