:- use_module(library(dcgs)).
:- use_module(library(lists)).
:- use_module(library(dif)).

% util
peek(T), [T] --> [T].

% eof is only true at the end of the string, but does not consume anything.
% A sprinkle of state may be needed to avoid matching multiple times.
eof_([], []).
eof --> call(eof_).

% csv rules
rows([])       --> rows_end.
rows([R | Rs]) --> row(R),rows(Rs).

rows_end --> [eof], eof. % --> [eof-the-atom], eof-the-dcgrule

row([F])      --> field(F),row_end.
row([F | Fs]) --> field(F),row(Fs).

row_end        --> [eol], peek(_).
row_end, [eof] --> [eol], eof.

field([])       --> field_end.
field([C | Cs]) --> [C], {maplist(dif(C), [eof,eol | "\n;"])}, field(Cs).

field_end        --> ";".
field_end, [eol] --> "\n".
field_end, [eol] --> eof.

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0032;;2;2;N;SUPERSCRIPT DIGIT TWO;;;;\n00B3;SUPERSCRIPT THREE;No;0;EN;<super> 0033;;3;3;N;SUPERSCRIPT DIGIT THREE;;;;\n00B4;ACUTE ACCENT;Sk;0;ON;<compat> 0020 0301;;;;N;SPACING ACUTE;;;;\n00B5;MICRO SIGN;Ll;0;L;<compat> 03BC;;;;N;;;039C;;039C\n00B6;PILCROW SIGN;Po;0;ON;;;;;N;PARAGRAPH SIGN;;;;\n00B7;MIDDLE DOT;Po;0;ON;;;;;N;;;;;\n00B8;CEDILLA;Sk;0;ON;<compat> 0020 0327;;;;N;SPACING CEDILLA;;;;\n00B9;SUPERSCRIPT ONE;No;0;EN;<super> 0031;;1;1;N;SUPERSCRIPT DIGIT ONE;;;;\n00BA;MASCULINE ORDINAL INDICATOR;Lo;0;L;<super> 006F;;;;N;;;;;\n00BB;RIGHT-POINTING DOUBLE ANGLE QUOTATION MARK;Pf;0;ON;;;;;Y;RIGHT POINTING GUILLEMET;;;;\n00BC;VULGAR FRACTION ONE QUARTER;No;0;ON;<fraction> 0031 2044 0034;;;1/4;N;FRACTION ONE QUARTER;;;;\n00BD;VULGAR FRACTION ONE HALF;No;0;ON;<fraction> 0031 2044 0032;;;1/2;N;FRACTION ONE HALF;;;;\n00BE;VULGAR FRACTION THREE QUARTERS;No;0;ON;<fraction> 0033 2044 0034;;;3/4;N;FRACTION THREE QUARTERS;;;;\n00BF;INVERTED QUESTION MARK;Po;0;ON;;;;;N;;;;;\n00C0;LATIN CAPITAL LETTER A WITH GRAVE;Lu;0;L;0041 0300;;;;N;LATIN CAPITAL LETTER A GRAVE;;;00E0;\n00C1;LATIN CAPITAL LETTER A WITH ACUTE;Lu;0;L;0041 0301;;;;N;LATIN CAPITAL LETTER A ACUTE;;;00E1;\n00C2;LATIN CAPITAL LETTER A WITH CIRCUMFLEX;Lu;0;L;0041 0302;;;;N;LATIN CAPITAL LETTER A CIRCUMFLEX;;;00E2;\n00C3;LATIN CAPITAL LETTER A WITH TILDE;Lu;0;L;0041 0303;;;;N;LATIN CAPITAL LETTER A TILDE;;;00E3;\n00C4;LATIN CAPITAL LETTER A WITH DIAERESIS;Lu;0;L;0041 0308;;;;N;LATIN CAPITAL LETTER A DIAERESIS;;;00E4;\n00C5;LATIN CAPITAL LETTER A WITH RING ABOVE;Lu;0;L;0041 030A;;;;N;LATIN CAPITAL LETTER A RING;;;00E5;\n00C6;LATIN CAPITAL LETTER AE;Lu;0;L;;;;;N;LATIN CAPITAL LETTER A E;;;00E6;\n00C7;LATIN CAPITAL LETTER C WITH CEDILLA;Lu;0;L;0043 0327;;;;N;LATIN CAPITAL LETTER C CEDILLA;;;00E7;\n00C8;LATIN CAPITAL LETTER E WITH GRAVE;Lu;0;L;0045 0300;;;;N;LATIN CAPITAL LETTER E GRAVE;;;00E8;\n00C9;LATIN CAPITAL LETTER E WITH ACUTE;Lu;0;L;0045 0301;;;;N;LATIN CAPITAL LETTER E ACUTE;;;00E9;\n00CA;LATIN CAPITAL LETTER E WITH CIRCUMFLEX;Lu;0;L;0045 0302;;;;N;LATIN CAPITAL LETTER E CIRCUMFLEX;;;00EA;\n00CB;LATIN CAPITAL LETTER E WITH DIAERESIS;Lu;0;L;0045 0308;;;;N;LATIN CAPITAL LETTER E DIAERESIS;;;00EB;\n00CC;LATIN CAPITAL LETTER I WITH GRAVE;Lu;0;L;0049 0300;;;;N;LATIN CAPITAL LETTER I GRAVE;;;00EC;\n00CD;LATIN CAPITAL LETTER I WITH ACUTE;Lu;0;L;0049 0301;;;;N;LATIN CAPITAL LETTER I ACUTE;;;00ED;\n00CE;LATIN CAPITAL LETTER I WITH CIRCUMFLEX;Lu;0;L;0049 0302;;;;N;LATIN CAPITAL LETTER I CIRCUMFLEX;;;00EE;\n00CF;LATIN CAPITAL LETTER I WITH DIAERESIS;Lu;0;L;0049 0308;;;;N;LATIN CAPITAL LETTER I DIAERESIS;;;00EF;\n00D0;LATIN CAPITAL LETTER ETH;Lu;0;L;;;;;N;;;;00F0;\n00D1;LATIN CAPITAL LETTER N WITH TILDE;Lu;0;L;004E 0303;;;;N;LATIN CAPITAL LETTER N TILDE;;;00F1;\n00D2;LATIN CAPITAL LETTER O WITH GRAVE;Lu;0;L;004F 0300;;;;N;LATIN CAPITAL LETTER O GRAVE;;;00F2;\n00D3;LATIN CAPITAL LETTER O WITH ACUTE;Lu;0;L;004F 0301;;;;N;LATIN CAPITAL LETTER O ACUTE;;;00F3;\n00D4;LATIN CAPITAL LETTER O WITH CIRCUMFLEX;Lu;0;L;004F 0302;;;;N;LATIN CAPITAL LETTER O CIRCUMFLEX;;;00F4;\n00D5;LATIN CAPITAL LETTER O WITH TILDE;Lu;0;L;004F 0303;;;;N;LATIN CAPITAL LETTER O TILDE;;;00F5;\n00D6;LATIN CAPITAL LETTER O WITH DIAERESIS;Lu;0;L;004F 0308;;;;N;LATIN CAPITAL LETTER O DIAERESIS;;;00F6;\n00D7;MULTIPLICATION SIGN;Sm;0;ON;;;;;N;;;;;\n00D8;LATIN CAPITAL LETTER O WITH STROKE;Lu;0;L;;;;;N;LATIN CAPITAL LETTER O SLASH;;;00F8;\n00D9;LATIN CAPITAL LETTER U WITH GRAVE;Lu;0;L;0055 0300;;;;N;LATIN CAPITAL LETTER U GRAVE;;;00F9;\n00DA;LATIN CAPITAL LETTER U WITH ACUTE;Lu;0;L;0055 0301;;;;N;LATIN CAPITAL LETTER U ACUTE;;;00FA;\n00DB;LATIN CAPITAL LETTER U WITH CIRCUMFLEX;Lu;0;L;0055 0302;;;;N;LATIN CAPITAL LETTER U CIRCUMFLEX;;;00FB;\n00DC;LATIN CAPITAL LETTER U WITH DIAERESIS;Lu;0;L;0055 0308;;;;N;LATIN CAPITAL LETTER U DIAERESIS;;;00FC;\n00DD;LATIN CAPITAL LETTER Y WITH ACUTE;Lu;0;L;0059 0301;;;;N;LATIN CAPITAL LETTER Y ACUTE;;;00FD;\n00DE;LATIN CAPITAL LETTER THORN;Lu;0;L;;;;;N;;;;00FE;\n00DF;LATIN SMALL LETTER SHARP S;Ll;0;L;;;;;N;;;;;\n00E0;LATIN SMALL LETTER A WITH GRAVE;Ll;0;L;0061 0300;;;;N;LATIN SMALL LETTER A GRAVE;;00C0;;00C0\n00E1;LATIN SMALL LETTER A WITH ACUTE;Ll;0;L;0061 0301;;;;N;LATIN SMALL LETTER A ACUTE;;00C1;;00C1\n00E2;LATIN SMALL LETTER A WITH CIRCUMFLEX;Ll;0;L;0061 0302;;;;N;LATIN SMALL LETTER A CIRCUMFLEX;;00C2;;00C2\n00E3;LATIN SMALL LETTER A WITH TILDE;Ll;0;L;0061 0303;;;;N;LATIN SMALL LETTER A TILDE;;00C3;;00C3\n00E4;LATIN SMALL LETTER A WITH DIAERESIS;Ll;0;L;0061 0308;;;;N;LATIN SMALL LETTER A DIAERESIS;;00C4;;00C4\n00E5;LATIN SMALL LETTER A WITH RING ABOVE;Ll;0;L;0061 030A;;;;N;LATIN SMALL LETTER A RING;;00C5;;00C5\n00E6;LATIN SMALL LETTER AE;Ll;0;L;;;;;N;LATIN SMALL LETTER A E;;00C6;;00C6\n00E7;LATIN SMALL LETTER C WITH CEDILLA;Ll;0;L;0063 0327;;;;N;LATIN SMALL LETTER C CEDILLA;;00C7;;00C7\n00E8;LATIN SMALL LETTER E WITH GRAVE;Ll;0;L;0065 0300;;;;N;LATIN SMALL LETTER E GRAVE;;00C8;;00C8\n00E9;LATIN SMALL LETTER E WITH ACUTE;Ll;0;L;0065 0301;;;;N;LATIN SMALL LETTER E ACUTE;;00C9;;00C9\n00EA;LATIN SMALL LETTER E WITH CIRCUMFLEX;Ll;0;L;0065 0302;;;;N;LATIN SMALL LETTER E CIRCUMFLEX;;00CA;;00CA\n00EB;LATIN SMALL LETTER E WITH DIAERESIS;Ll;0;L;0065 0308;;;;N;LATIN SMALL LETTER E DIAERESIS;;00CB;;00CB\n00EC;LATIN SMALL LETTER I WITH GRAVE;Ll;0;L;0069 0300;;;;N;LATIN SMALL LETTER I GRAVE;;00CC;;00CC\n00ED;LATIN SMALL LETTER I WITH ACUTE;Ll;0;L;0069 0301;;;;N;LATIN SMALL LETTER I ACUTE;;00CD;;00CD\n00EE;LATIN SMALL LETTER I WITH CIRCUMFLEX;Ll;0;L;0069 0302;;;;N;LATIN SMALL LETTER I CIRCUMFLEX;;00CE;;00CE\n00EF;LATIN SMALL LETTER I WITH DIAERESIS;Ll;0;L;0069 0308;;;;N;LATIN SMALL LETTER I DIAERESIS;;00CF;;00CF\n00F0;LATIN SMALL LETTER ETH;Ll;0;L;;;;;N;;;00D0;;00D0\n00F1;LATIN SMALL LETTER N WITH TILDE;Ll;0;L;006E 0303;;;;N;LATIN SMALL LETTER N TILDE;;00D1;;00D1\n00F2;LATIN SMALL LETTER O WITH GRAVE;Ll;0;L;006F 0300;;;;N;LATIN SMALL LETTER O GRAVE;;00D2;;00D2\n00F3;LATIN SMALL LETTER O WITH ACUTE;Ll;0;L;006F 0301;;;;N;LATIN SMALL LETTER O ACUTE;;00D3;;00D3\n00F4;LATIN SMALL LETTER O WITH CIRCUMFLEX;Ll;0;L;006F 0302;;;;N;LATIN SMALL LETTER O CIRCUMFLEX;;00D4;;00D4\n00F5;LATIN SMALL LETTER O WITH TILDE;Ll;0;L;006F 0303;;;;N;LATIN SMALL LETTER O TILDE;;00D5;;00D5\n00F6;LATIN SMALL LETTER O WITH DIAERESIS;Ll;0;L;006F 0308;;;;N;LATIN SMALL LETTER O DIAERESIS;;00D6;;00D6").

codename(Codepoint, Codename) :-
    data(Data),
    phrase(rows(Rows), Data),
    member(Row, Rows),
    Row = [Codepoint, Codename | _].

% work around weird parsing behavior with extraneous choicepoints
get_codename(Codepoint, Codename) :- findall(Name, codename(Codepoint,Name), Names), Names = [Codename | _].