Unicode-JP (Rust)

Converters of troublesome characters included in Japanese texts.

• Half-width-kana[半角ｶﾅ;HANKAKU KANA] -> normal Katakana
• Wide-alphanumeric[全角英数;ZENKAKU EISU] <-> normal ASCII

If you need canonicalization of texts including Japanese, consider to use unicode_normalization crate at first. NFD, NFKD, NFC and NFKC can be used. This crate, however, works with you if you are in a niche such as a need of delicate control of Japanese characters for a restrictive character terminal.

Japanese have two syllabary systems Hiragana and Katakana, and Half-width-kana is another notation system of them. In the systems, there are two combinable diacritical marks Voiced-sound-mark and Semi-voiced-sound-mark. Unicode has three independent code points for each of the marks. In addition to it, we often use special style Latin alphabets and Arabic numbers called Wide-alphanumeric in Japanese texts. This small utility converts these codes each other.

API Reference

Example

Cargo.toml

[dependencies]
unicode-jp = "0.4.0"

src/main.rs

extern crate kana;
use kana::*;

fn main() {
    let s1 = "ﾏﾂｵ ﾊﾞｼｮｳ ｱﾟ";
    assert_eq!("マツオ バショウ ア ゚", half2kana(s1));
    assert_eq!("マツオ バショウ ア゚", half2full(s1));

    let s2 = "ひ゜ひ゛んは゛";
    assert_eq!("ぴびんば", combine(s2));
    assert_eq!("ひ ゚ひ ゙んは ゙", vsmark2combi(s2));

    let s3 = "＃＆Ｒｕｓｔ－１．６！";
    assert_eq!("#&Rust-1.6!", wide2ascii(s3));
}

Functions of kana crate:

• wide2ascii(&str) -> String
  convert Wide-alphanumeric into normal ASCII [Ａ -> A]

• ascii2wide(&str) -> String
  convert normal ASCII characters into Wide-alphanumeric [A -> Ａ]

• half2full(&str) -> String
  convert Half-width-kana into normal Katakana with diacritical marks separated [ｱﾞﾊﾟ -> ア゙パ]
  This method is simple, but tends to cause troubles when rendering. In such a case, use half2kana() or execute vsmark2{full|half|combi} as post process.

• half2kana(&str) -> String
  convert Half-width-kana into normal Katakana with diacritical marks combined [ｱﾞﾊﾟ -> アﾞパ]

• combine(&str) -> String
  combine base characters and diacritical marks on Hiragana/Katakana [かﾞハ゜ -> がパ]

• hira2kata(&str) -> String
  convert Hiragana into Katakana [あ -> ア]

• kata2hira(&str) -> String
  convert Katakana into Hiragana [ア -> あ]

• vsmark2full(&str) -> String
  convert all separated Voiced-sound-marks into full-width style "\u{309B}"

• vsmark2half(&str) -> String
  convert all separated Voiced-sound-marks into half-width style "\u{FF9E}"

• vsmark2combi(&str) -> String
  convert all separated Voiced-sound-marks into space+combining style "\u{20}\u{3099}"

• nowidespace(&str) -> String
  convert Wide-space into normal space ["　" -> " "]

• space2wide(&str) -> String
  convert normal space into Wide-space [" " -> "　"]

• nowideyen(&str) -> String
  convert Wide-yen into Half-width-yen ["￥" -> "¥"]

• yen2wide(&str) -> String
  convert Half-width-yen into Wide-yen ["¥" -> "￥"]

TODO or NOT TODO

• Voiced-sound-marks -> no space combining style "\u{3099}"
• Half-width-kana <- normal Katakana
• (normal/wide)tilde <-> Wave-dash