%---------------------------------------------------------------------------%
% vim: ts=4 sw=4 et ft=mercury
%---------------------------------------------------------------------------%
%
:- module unicode_test.

:- interface.

:- import_module io.

:- pred main(io::di, io::uo) is det.

:- implementation.

:- import_module char.
:- import_module list.
:- import_module string.

main(!IO) :-
    list.foldl(write_string_as_binary, utf8_strings, !IO),
    io.nl(!IO),
    Str = string.join_list("(☿)\n", utf8_strings),
    io.write_string(Str, !IO),
    io.nl(!IO).

:- func utf8_strings = list(string).

utf8_strings = [
    "\u0003",
    "\U00000003",
    "\u0394",  % delta
    "\u03A0",  % pi
    "\uFFFD",
    "\U0010fffd",
    "\U000ABCde",
    "r\u00E9sum\u00E9", % "resume" with accents
    "abc123",
    "\u005cu0041",
    "\x5c\u0041",
    "\x5c\\u0041",
    "\\u0041",
    "u0041"
].

:- pred write_string_as_binary(string::in, io::di, io::uo) is det.

write_string_as_binary(Str, !IO) :-
    Chars = string.to_char_list(Str),
    Ints = list.map(to_int, Chars),
    Bins = list.map(( func(X) = int_to_base_string(X, 2) ), Ints),
    PaddedBins = list.map(( func(S) = pad_left(S, '0', 8) ), Bins),
    Bin = string.join_list(" ", PaddedBins),
    io.write_string(Bin, !IO),
    io.nl(!IO).