#unicode #grapheme #codepoint #text #reader

unicode_reader

Adaptors which wrap byte-oriented readers and yield the UTF-8 data as Unicode code points or grapheme clusters

4 releases (2 stable)

1.0.1 Jun 24, 2020
1.0.0 Jun 14, 2019
0.1.1 Feb 7, 2018
0.1.0 Sep 20, 2016

#81 in Text processing

Download history 88/week @ 2021-01-09 120/week @ 2021-01-16 93/week @ 2021-01-23 338/week @ 2021-01-30 222/week @ 2021-02-06 207/week @ 2021-02-13 210/week @ 2021-02-20 393/week @ 2021-02-27 176/week @ 2021-03-06 226/week @ 2021-03-13 303/week @ 2021-03-20 99/week @ 2021-03-27 106/week @ 2021-04-03 232/week @ 2021-04-10 202/week @ 2021-04-17 252/week @ 2021-04-24

728 downloads per month
Used in 12 crates (8 directly)

MIT/Apache

19KB
237 lines

unicode_reader

Build Status

Documentation

Adaptors which wrap byte-oriented readers and yield the UTF-8 data as Unicode code points or grapheme clusters.

Unlike other Unicode parsers which work on strings (for instance, unicode_segmentation, upon which this is built), this crate works on streams and doesn't require reading the entire data into memory. Instead it yields the graphemes or code points as it reads them.

extern crate unicode_reader;
use unicode_reader::Graphemes;

use std::io::Cursor;

fn main() {
    let input = Cursor::new("He\u{302}\u{320}llo");
    let mut graphemes = Graphemes::from(input);
    assert_eq!("H",                 graphemes.next().unwrap().unwrap());
    assert_eq!("e\u{302}\u{320}",   graphemes.next().unwrap().unwrap()); // note 3 characters
    assert_eq!("l",                 graphemes.next().unwrap().unwrap());
    assert_eq!("l",                 graphemes.next().unwrap().unwrap());
    assert_eq!("o",                 graphemes.next().unwrap().unwrap());
    assert!(graphemes.next().is_none());

    let greek_bytes = vec![0xCE, 0xA7, 0xCE, 0xB1, 0xCE, 0xAF, 0xCF, 0x81, 0xCE, 0xB5,
                           0xCF, 0x84, 0xCE, 0xB5];
    let mut codepoints = CodePoints::from(Cursor::new(greek_bytes));
    assert_eq!(vec!['Χ', 'α', 'ί', 'ρ', 'ε', 'τ', 'ε'],
                codepoints.map(|r| r.unwrap())
                          .collect::<Vec<char>>());
}

Dependencies

~550KB