Struct GrepFilter 

pub struct GrepFilter<R> { /* private fields */ }

A Read adapter that strips grep -C separator lines (--\n) from the input stream.

When piping grep output into the parser (grep -C5 pattern dump | parser), grep inserts -- lines between match groups. These corrupt the binary frame stream. Wrap the input in GrepFilter to transparently remove them.

Only exact --\n and --\r\n lines are stripped. Similar lines like ---\n or -- \n pass through unchanged.

When to skip this filter

GrepFilter adds a small per-byte overhead (~3% CPU on large files) for newline scanning even when no separators are present. If your application opens dump files directly (not piped through grep), pass the reader straight to FrameIterator / MessageIterator / ParsedMessageIterator without wrapping:

use std::fs::File;
use freeswitch_sofia_trace_parser::ParsedMessageIterator;

// Direct file — no GrepFilter overhead
let file = File::open("profile.dump").unwrap();
for msg in ParsedMessageIterator::new(file) {
    // ...
}

Implementations

impl<R: Read> GrepFilter<R>

pub fn new(reader: R) -> Self

Create a new filter wrapping the given reader.

Trait Implementations

impl<R: Read> Read for GrepFilter<R>

fn read(&mut self, out: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut<'_>]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)

Determines if this Reader has an efficient read_vectored implementation.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Reads all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Reads all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Reads the exact number of bytes required to fill buf.

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Pull some bytes from this source into the specified buffer.

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)

Reads the exact number of bytes required to fill cursor.

fn by_ref(&mut self) -> &mut Self

where Self: Sized,

Creates a “by reference” adapter for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R>

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

where Self: Sized,

Creates an adapter which will read at most limit bytes from it.

fn read_array<const N: usize>(&mut self) -> Result<[u8; N], Error>

where Self: Sized,

🔬This is a nightly-only experimental API. (read_array)

Read and return a fixed array of bytes from this source.