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macro_rules! element_to_binary_digit {
($binary_value:ident, $elements:expr, $offset:expr) => {
let elements = $elements;
let offset = $offset;
if elements.len() > offset {
$binary_value *= 2;
if elements[offset] == b'.' {
$binary_value += 0;
} else if elements[offset] == b'-' {
$binary_value += 1;
} else {
panic!("Unexpected element");
}
}
};
}
macro_rules! to_script {
($(#[$outer:meta])* $array_name:ident, $function_name:ident, $($elements:expr => $character:expr),+ $(,)? ) => {
const $array_name: [char; 256] = {
let mut x = ['\0'; 256];
$(
let elements = $elements.as_bytes();
let mut binary_value = 1;
if elements.len() > 8 { panic!("Too many elements"); }
element_to_binary_digit!(binary_value, elements, 7);
element_to_binary_digit!(binary_value, elements, 6);
element_to_binary_digit!(binary_value, elements, 5);
element_to_binary_digit!(binary_value, elements, 4);
element_to_binary_digit!(binary_value, elements, 3);
element_to_binary_digit!(binary_value, elements, 2);
element_to_binary_digit!(binary_value, elements, 1);
element_to_binary_digit!(binary_value, elements, 0);
if x[binary_value as usize] != '\0' {
panic!("Conflict between binary values");
}
x[binary_value as usize] = $character;
)+
x[0] = ' ';
x
};
$(#[$outer])*
///
/// This function should not be called directly, but passed as an argument to either
/// [decode_stream][crate::decode_stream] or [decode_string][crate::decode_string].
///
/// The `elements` parameter represents up to 7 Morse code elements. There is one bit per
/// element (0 for dot, 1 for dash), and a leading bit do detect the number of elements.
pub fn $function_name(elements: u8) -> char {
$array_name[elements as usize]
}
};
}
to_script! {
/// Mapping from Morse code to Latin text
TO_STANDARD,
to_standard,
// NOTE: Mappings are sorted like a complete binary tree in array representation. In other
// words, they are sorted by length, then in lexicographic order. For lengths up to 5, all
// possible combinations of Morse symbols are listed.
//
// This is the same order as in
// The ARRL handbook for the Radio Amateur (1985), 19-20 https://archive.org/details/arrlhandbookforr0000unse_w7j4/page/n433/mode/2up
// One element
"." => 'E',
"-" => 'T',
// Two elements
".." => 'I',
".-" => 'A',
"-." => 'N',
"--" => 'M',
// Three elements
"..." => 'S',
"..-" => 'U',
".-." => 'R',
".--" => 'W',
"-.." => 'D',
"-.-" => 'K',
"--." => 'G',
"---" => 'O',
// Four elements
"...." => 'H',
"...-" => 'V',
"..-." => 'F',
"..--" => 'Ü',
".-.." => 'L',
".-.-" => 'Ä',
".--." => 'P',
".---" => 'J',
"-..." => 'B',
"-..-" => 'X',
"-.-." => 'C',
"-.--" => 'Y',
"--.." => 'Z',
"--.-" => 'Q',
"---." => 'Ö',
// "----" => 'CH', // no single Unicode codepoint for this digraph
// Five elements
"....." => '5',
"....-" => '4',
// "...-." => '<SN>', // prosign
"...--" => '3',
"..-.." => 'É', // or 'È' or 'Ę'
// "..-.-" => '<INT>', // prosign
"..--." => '!', // ??
"..---" => '2',
// ".-..." => '<AS>',
// ".-..-" => '<AU>',
".-.-." => '+', // or '<AR>'
// .-.--
// .--..
".--.-" => 'Á', // or 'À' or 'Ä' or 'Å'
// .---.
".----" => '1',
"-...." => '6',
"-...-" => '=', // or '<BT>'
"-..-." => '/', // or '<DN>'
// -..--
"-.-.." => 'Ç',
// "-.-.-" => '<KA>', // prosign
"-.--." => '(', // or '<KN>'
// -.---
"--..." => '7',
"--..-" => 'Ź', // or 'Ż', probably, but not listed in ARRL handbook
// --.-. // NOTE: missing from the ARRL handbook
"--.--" => 'Ñ', // NOTE: typo in the ARRL handbook incorrectly shows it encoded as --..--
"---.." => '8',
// ---.-
"----." => '9',
"-----" => '0',
// Six elements (only mapped)
// "....--" => '<HM>', // prosign
// "...-.-" => '<SK>', // prosign
// "..-..-" => '<IX>', // prosign
"..--.." => '?', // or '<IMI>'
"..--.-" => '_', // or '<IQ>'
".-..-." => '"', // or '<AF>'
".-.-.-" => '.', // or '<AAA>'
".--.-." => '@', // becaome official after 1985 ARRL handbook was published
".----." => '\'', // or '<WG>'
"-....-" => '-', // or '<DU>'
"-.-.-." => ';', // or '<KR>'
"-.--.-" => ')', // or '<KK>'
"--..--" => ',', // or '<MIM>'
"---..." => ':', // or '<OS>'
// Seven elements (only mapped)
"...-..-" => '$', // or '<SX>'
".-----." => '`',
}
to_script! {
/// Mapping from Morse code to Greek text
TO_GREEK,
to_greek,
// Greek Morse code
// Wikipedia: The Greek Morse code alphabet is very similar to the
// Latin alphabet. It uses one extra letter for Greek
// letter Χ and no longer uses the codes for Latin
// letters "J ", "U" and "V".
// https://en.wikipedia.org/wiki/Morse_code_for_non-Latin_alphabets#Greek
".-" => 'Α',
"-..." => 'Β',
"--." => 'Γ',
"-.." => 'Δ',
"." => 'Ε',
"--.." => 'Ζ',
"...." => 'Η',
"-.-." => 'Θ',
".." => 'Ι',
"-.-" => 'Κ',
".-.." => 'Λ',
"--" => 'Μ',
"-." => 'Ν',
"-..-" => 'Ξ',
"---" => 'Ο',
".--." => 'Π',
".-." => 'Ρ',
"..." => 'Σ',
"-" => 'Τ',
"-.--" => 'Υ',
"..-." => 'Φ',
"----" => 'Χ',
"--.-" => 'Ψ',
}
to_script! {
/// Mapping from Morse code to Russian (Cyrillic) text
TO_RUSSIAN,
to_russian,
// Russian Morse code for Cyrillic
// https://en.wikipedia.org/wiki/Russian_Morse_code (1857)
// Полное собрание законов Российской Империи. Собрание Второе
// These are listed in the order of the Wikipedia page (alphabetical
// order of the corresponding latin script character)
".-" => 'А', // a
"-..." => 'Б', // be
".--" => 'В', // ve
"--." => 'Г', // ghe
"-.." => 'Д', // de
"." => 'Е', // ie
"...-" => 'Ж', // zhe
"--.." => 'З', // ze
".." => 'И', // i
".---" => 'Й', // short i
"-.-" => 'К', // ka
".-.." => 'Л', // el
"--" => 'М', // em
"-." => 'Н', // en
"---" => 'О', // o
".--." => 'П', // pe
".-." => 'Р', // er
"..." => 'С', // es
"-" => 'Т',
"..-" => 'У', // u
"..-." => 'Ф', // ef
"...." => 'Х', // ha
"-.-." => 'Ц', // tse
"---." => 'Ч', // che
"----" => 'Ш', // sha
"--.-" => 'Щ', // shcha
"-..-" => 'Ъ', // hard sign
"-.--" => 'Ы', // yeru
"..-.." => 'Ѣ', // yat in Wikipedia article and in Russian law document
"..--" => 'Ю', // yu
".-.-" => 'Я', // ya
}
to_script! {
/// Mapping from Morse code to Japanese (Katakana) text
TO_JAPANESE,
to_japanese,
// Wabun code for Japanese, tnx JE1TRV
// https://en.wikipedia.org/wiki/Wabun_code
// https://www.rfcafe.com/references/qst/japanese-morse-telegraph-code-sep-1942-qst.htm (1942)
// https://web.archive.org/web/20220129114408/https://elaws.e-gov.go.jp/data/325M50080000017_20200622_502M60000008061/pict/S25F30901000017-001.pdf (1945?)
// 1. Kanas without any diacritics (dakuten or handakuten)
".-" => 'イ', // i
".-.-" => 'ロ', // ro
"-..." => 'ハ', // ha
"-.-." => 'ニ', // ni
"-.." => 'ホ', // ho
"." => 'ヘ', // he
"..-.." => 'ト', // to
"..-." => 'チ', // ti
"--." => 'リ', // ri
"...." => 'ヌ', // nu
"-.--." => 'ル', // ru
".---" => 'ヲ', // wo
"-.-" => 'ワ', // wa
".-.." => 'カ', // ka
"--" => 'ヨ', // yo
"-." => 'タ', // ta
"---" => 'レ', // re
"---." => 'ソ', // so
".--." => 'ツ', // tu
"--.-" => 'ネ', // ne
".-." => 'ナ', // na
"..." => 'ラ', // ra
"-" => 'ム', // mu
"..-" => 'ウ', // u
".-..-" => 'ヰ', // yi
"..--" => 'ノ', // no
".-..." => 'オ', // o
"...-" => 'ク', // ku
".--" => 'ヤ', // ya
"-..-" => 'マ', // ma
"-.--" => 'ケ', // ke
"--.." => 'フ', // fu
"----" => 'コ', // ko
"-.---" => 'エ', // e
".-.--" => 'テ', // te
"--.--" => 'ア', // a
"-.-.-" => 'サ', // sa
"-.-.." => 'キ', // ki
"-..--" => 'ユ', // yu
"-...-" => 'メ', // me
"..-.-" => 'ミ', // mi
"--.-." => 'シ', // si
".--.." => 'ヱ', // ye
"--..-" => 'ヒ', // hi
"-..-." => 'モ', // mo
".---." => 'セ', // se
"---.-" => 'ス', // su
".-.-." => 'ン', // n
".." => '゛', // dakuten modifier
"..--." => '゜', // handakuten modifier
".--.-" => 'ー', // mapped to -
"-.--.-" => '（', // mapped to (
".-..-." => '）', // mapped to )
".-.-.-" => '、', // mapped to .
".-.-.." => '」', // mapped to .
}
to_script! {
/// Mapping from Morse code to Korean (Hangul) text
TO_KOREAN,
to_korean,
// SKATS for Korean
// The ARRL handbook for the radio amateur, 19-3 (1985)
// https://archive.org/details/arrlhandbookforr0000unse_w7j4/page/n415/mode/2up
".-.." => 'ㄱ', // kiyeok
"..-." => 'ㄴ', // nieun
"-..." => 'ㄷ', // tikeut
"...-" => 'ㄹ', // rieul
"--" => 'ㅁ', // mieum
".--" => 'ㅂ', // pieup
"--." => 'ㅅ', // sios
"-.-" => 'ㅇ', // ieung
".--." => 'ㅈ', // cieuc
"-.-." => 'ㅊ', // chieuch
"-..-" => 'ㅋ', // khieukh
"--.." => 'ㅌ', // thieuth
"---" => 'ㅍ', // phieuph
".---" => 'ㅎ', // hieuh
"." => 'ㅏ', // a
"--.-" => 'ㅐ', // ae
".." => 'ㅑ', // ya
//".. ..-" => 'ㅒ', // yae
"-" => 'ㅓ', // eo
"-.--" => 'ㅔ', // e
"..." => 'ㅕ', // yeo
//"... ..-" => 'ㅖ', // ye
".-" => 'ㅗ', // o
"-." => 'ㅛ', // yo
"...." => 'ㅜ', // u
".-." => 'ㅠ', // yu
"-.." => 'ㅡ', // eu
"..-" => 'ㅣ', // i
}
to_script! {
/// Mapping from Morse code to Hebrew text
TO_HEBREW,
to_hebrew,
// Hebrew
// The ARRL handbook for the radio amateur, 19-3 (1985)
// https://archive.org/details/arrlhandbookforr0000unse_w7j4/page/n415/mode/2up
".-" => 'א', // alef
"-..." => 'ב', // bet
"--." => 'ג', // gimel
"-.." => 'ד', // dalet
"---" => 'ה', // he
"." => 'ו', // vav
"--.." => 'ז', // zayin
"...." => 'ח', // chet
"..-" => 'ט', // tet
".." => 'י', // yod
"-.-" => 'כ', // kaf
".-.." => 'ל', // lamed
"--" => 'מ', // mem
"-." => 'נ', // nun
"-.-." => 'ס', // samekh
".---" => 'ע', // ayin
".--." => 'פ', // pe
".--" => 'צ', // tsadi
"--.-" => 'ק', // qof
".-." => 'ר', // resh
"..." => 'ש', // dotless shin
"-" => 'ת', // dotless tav
}
to_script! {
/// Mapping from Morse code to Arabic text
TO_ARABIC,
to_arabic,
// Arabic
// The ARRL handbook for the radio amateur, 19-3 (1985)
// https://archive.org/details/arrlhandbookforr0000unse_w7j4/page/n415/mode/2up
// Unicode points were copied from “Isolated form”, and names from “Letter name” in
// https://en.wikipedia.org/wiki/Arabic_alphabet#Table_of_basic_letters
// TODO: add contextual forms
".-" => 'ا', // ʾalif
"-..." => 'ب', // bāʾ/bah
"-" => 'ت', // tāʾ/tah
"-.-." => 'ث', // thāʾ/thah
".---" => 'ج', // jīm
"...." => 'ح', // ḥāʾ/ḥah
"---" => 'خ', // khāʾ/khah
"-.." => 'د', // dāl/dāʾ/dah
"--.." => 'ذ', // dhāl/dhāʾ/dhah
".-." => 'ر', // rāʾ/rah
"---." => 'ز', // zāy/zayn/zāʾ/zah
"..." => 'س', // sīn
"----" => 'ش', // shīn
"-..-" => 'ص', // ṣād
"...-" => 'ض', // ḍād/ḍāʾ/ḍah
"..-" => 'ط', // ṭāʾ/ṭah
"-.--" => 'ظ', // ẓāʾ/ẓah
".-.-" => 'ع', // ʿayn
"--." => 'غ', // ghayn
"..-." => 'ف', // fāʾ/fah
"--.-" => 'ق', // qāf
"-.-" => 'ڪ', // kāf/kāʾ/kah
".-.." => 'ل', // lām
"--" => 'م', // mīm
"-." => 'ن', // nūn
"..-.." => 'ه', // hāʾ/hah
".--" => 'و', // wāw
".." => 'ے', // yāʾ/yah
//".-...-" => 'لا', // lām-alif (ligature)
// other characters without a reference
"." => 'ء', // hamzah
}