87 lines
1.9 KiB
Plaintext
87 lines
1.9 KiB
Plaintext
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:- object(morse).
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:- info([
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version is 1.0,
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author is 'Paulo Moura',
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date is 2007/06/14,
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comment is 'Morse code decoder.']).
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:- public(morse//1).
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:- mode(morse(-list(atom)), zero_or_one).
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:- info(morse//1, [
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comment is 'Recognizes a message in Morse code, returning the corresponding list of words.',
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argnames is ['Words']]).
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morse([Word| Words]) --> word(Characters), {atom_chars(Word, Characters)}, " ", morse(Words).
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morse([Word]) --> word(Characters), {atom_chars(Word, Characters)}.
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word([Character| Characters]) --> character(LM), {code(Character, LM)}, " ", word(Characters).
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word([Character]) --> character(Symbols), {code(Character, Symbols)}.
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character([Symbol| Symbols]) --> symbol([Symbol]), character(Symbols).
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character([Symbol]) --> symbol([Symbol]).
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symbol(".") --> ".".
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symbol("-") --> "-".
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code(a, ".-").
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code(b, "-...").
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code(c, "-.-.").
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code(d, "-..").
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code(e, ".").
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code(f, "..-.").
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code(g, "--.").
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code(h, "....").
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code(i, "..").
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code(j, ".---").
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code(k, "-.-").
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code(l, ".-..").
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code(m, "--").
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code(n, "-.").
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code(o, "---").
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code(p, ".--.").
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code(q, "--.-").
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code(r, ".-.").
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code(s, "...").
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code(t, "-").
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code(u, "..-").
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code(v, "...-").
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code(w, ".--").
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code(x, "-..-").
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code(y, "-.--").
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code(z, "--..").
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code('1', ".----").
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code('2', "..---").
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code('3', "...--").
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code('4', "....-").
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code('5', ".....").
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code('6', "-....").
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code('7', "--...").
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code('8', "---..").
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code('9', "----.").
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code('0', "-----").
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code('.', ".-.-.-").
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code(',', "--..--").
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code('?', "..--..").
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code('''', ".----.").
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code('!', "-.-.--").
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%code('!', "— — — ·").
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code('/', "-..-.").
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code('(', "-.--.").
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code(')', "-.--.-").
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code('&', ".-...").
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code(':', "---...").
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code(';', "-.-.-.").
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code('=', "-...-").
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code('+', ".-.-.").
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code('-', "-....-").
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code('_', "..--.-").
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code('"', ".-..-.").
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code('$', "...-..-").
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code('@', ".--.-").
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:- end_object.
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