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update
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@ -366,7 +366,6 @@ impl<'g, R: io::Read> GrepBuffered<'g, R> {
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let nread = try!(self.rdr.read(&mut self.b.buf[self.b.tmp.len()..]));
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// Now update our various positions.
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self.pos += self.start;
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println!("start: {:?}, pos: {:?}", self.start, self.pos);
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self.start = 0;
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// The end is the total number of bytes read plus whatever we had for
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// leftovers.
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@ -460,18 +459,31 @@ fn s(bytes: &[u8]) -> String {
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mod tests {
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#![allow(unused_imports)]
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use memchr::{memchr, memrchr};
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use regex::bytes::Regex;
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use super::{Buffer, GrepBuilder, s};
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static SHERLOCK: &'static [u8] = include_bytes!("./data/sherlock.txt");
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#[test]
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fn buffered() {
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// Find the expected number of matches and the position of the last
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// match.
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let re = Regex::new("Sherlock Holmes").unwrap();
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let ms: Vec<_> = re.find_iter(SHERLOCK).collect();
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let expected_count = ms.len();
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let (start, end) = *ms.last().unwrap();
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let start = memrchr(b'\n', &SHERLOCK[..start]).unwrap() + 1;
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let end = memchr(b'\n', &SHERLOCK[end..]).unwrap() + end;
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// Now compare it with what Grep finds.
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let g = GrepBuilder::new("Sherlock Holmes").create().unwrap();
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let mut bg = g.buffered_reader(Buffer::new(), SHERLOCK);
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let ms: Vec<_> = bg.iter().map(|r| r.unwrap()).collect();
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let m = ms.last().unwrap();
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assert_eq!(91, ms.len());
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assert_eq!(575707, m.start());
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assert_eq!(575784, m.end());
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assert_eq!(expected_count, ms.len());
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assert_eq!(start, m.start());
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assert_eq!(end, m.end());
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}
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}
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16
src/main.rs
16
src/main.rs
@ -50,13 +50,18 @@ fn run(args: &Args) -> Result<u64> {
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if args.arg_file.is_empty() {
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unimplemented!()
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} else {
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let searcher =
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try!(GrepBuilder::new(&args.arg_pattern).create());
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run_mmap(args, &searcher)
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let searcher = try!(GrepBuilder::new(&args.arg_pattern).create());
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if args.flag_count {
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run_mmap_count_only(args, &searcher)
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} else {
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run_mmap(args, &searcher)
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}
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}
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}
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fn run_mmap(args: &Args, searcher: &Grep) -> Result<u64> {
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unimplemented!()
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/*
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for m in searcher.iter(text) {
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if !args.flag_count {
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try!(wtr.write(&text[m.start()..m.end()]));
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@ -65,17 +70,18 @@ fn run_mmap(args: &Args, searcher: &Grep) -> Result<u64> {
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count += 1;
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}
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Ok(count)
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*/
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}
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#[inline(never)]
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fn run_mmap_count_only(args: &Args, searcher: &LineSearcher) -> Result<u64> {
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fn run_mmap_count_only(args: &Args, searcher: &Grep) -> Result<u64> {
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use memmap::{Mmap, Protection};
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assert!(args.arg_file.len() == 1);
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let mut wtr = io::BufWriter::new(io::stdout());
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let mmap = try!(Mmap::open_path(&args.arg_file[0], Protection::Read));
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let text = unsafe { mmap.as_slice() };
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let count = searcher.search(text).last().map_or(0, |m| m.count + 1);
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let count = searcher.iter(text).count() as u64;
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try!(writeln!(wtr, "{}", count));
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Ok(count)
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}
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