Struct LineIndex 

pub struct LineIndex { /* private fields */ }

Implementations

impl LineIndex

pub fn new() -> Self

pub fn new_starting_at(start_byte: usize) -> Self

Construct a line index that begins at the given byte offset. Bytes before start_byte are never scanned and never appear in line_range. Used by --tail to skip past the head of the source.

pub fn set_head_cap(&mut self, cap: usize)

Limit the index to the first N logical lines from the start point. line_count clamps to this and extend_to_byte stops scanning past it. Used by --head N.

pub fn set_record_start(&mut self, re: Regex)

Enable records mode using the supplied regex. Must be called before any scanning has begun. Re-calling panics in debug builds.

pub fn records_mode(&self) -> bool

True iff records mode is active (a regex was set).

pub fn line_count(&self) -> usize

pub fn extend_to_line(&mut self, n: usize, src: &dyn Source)

pub fn extend_to_end(&mut self, src: &dyn Source)

pub fn notice_new_bytes(&mut self, src: &dyn Source)

pub fn scanned_through(&self) -> usize

Byte position up to which the index has scanned.

pub fn extend_to_byte_for_query(&mut self, src: &dyn Source, byte: usize)

Extend the index until byte is covered (or EOF). Public wrapper around the private extend_to_byte, for callers that need to query a specific byte position.

pub fn line_at_byte(&self, byte: usize) -> Option<usize>

Find the physical-line index containing the byte at position byte. Returns None if byte is before start_byte or at/after scanned_through.

pub fn line_range(&self, n: usize, src: &dyn Source) -> Range<usize>

Byte range of line n (excluding the trailing newline). Caller must ensure n < line_count() and the index has scanned through the line.

pub fn record_count(&self) -> usize

Number of records exposed by this index. Equals line_count() when records mode is inactive. May be less than line_count() when records mode is active and records span multiple physical lines.

pub fn record_range(&self, n: usize, src: &dyn Source) -> Range<usize>

Byte range of record n including embedded \ns. Excludes the trailing \n after the record’s last physical line (if any).

pub fn record_line_range(&self, n: usize) -> Range<usize>

Range of physical line indices [first..last) covered by record n.

pub fn line_to_record(&self, line_n: usize) -> usize

Record index that contains physical line line_n. O(log records).

pub fn record_bytes<'a>(&self, n: usize, src: &'a dyn Source) -> Cow<'a, [u8]>

Contiguous byte slice covering record n. Embedded \ns present.

Trait Implementations

impl Default for LineIndex

fn default() -> Self

Returns the “default value” for a type.