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lib/Acme/Aheui.pm  view on Meta::CPAN

    my $source = $args{source} || '';
    my $encoding = $args{output_encoding} || Term::Encoding::get_encoding();

    my $self = {
        _codespace => build_codespace($source),
        _stacks => [],
        _stack_index => 0,
        _x => 0,
        _y => 0,
        _dx => 0,
        _dy => 1,
        _encoding => $encoding,
    };
    bless $self, $class;

    return $self;
}

sub build_codespace {
    my ($source) = @_;

    my @lines = split /\r?\n/, $source;
    my @rows = ();
    for my $line (@lines) {
        my @row = ();
        for my $char (split //, $line) {
            my $disassembled = disassemble_hangul_char($char);
            push @row, $disassembled;
        }
        push @rows, \@row;
    }
    return \@rows;
}

sub disassemble_hangul_char {
    my ($char) = @_;

    if ($char =~ /[가-힣]/) {
        my $code = unpack 'U', $char;
        $code -= 0xAC00;
        my ($cho, $jung, $jong) = (int($code/28/21), ($code/28)%21, $code%28);
        return {cho => $cho, jung => $jung, jong => $jong};
    }
    else {
        return {cho => -1, jung => -1, jong => -1};
    }
}

=head2 execute

    $interpreter->execute();

This method will execute the aheui program and return the exit code.
It may use C<STDIN> and/or C<STDOUT> if the aheui program uses I/O.

=cut

sub execute {
    my ($self) = @_;

    return 0 unless $self->_has_initial_command();
    return $self->_loop_steps();
}

sub _has_initial_command {
    my ($self) = @_;

    for my $row (@{ $self->{_codespace} }) {
        my $first_command = @$row[0];
        if ($first_command && $$first_command{cho} != -1) {
            return 1;
        }
    }
    return 0;
}

sub _loop_steps {
    my ($self) = @_;

    while (1) {
        my $codespace = $self->{_codespace};
        my ($x, $y) = ($self->{_x}, $self->{_y});

        if ($x > $#{$$codespace[$y]}) {
            $self->_move_cursor();
            next;
        }

        my $c = $$codespace[$y][$x];

        if (!$c || $c->{cho} == -1) {
            $self->_move_cursor();
            next;
        }

        my $cho = $c->{cho};
        my $jung = $c->{jung};
        my $jong = $c->{jong};
        my $si = $self->{_stack_index};

        my ($dx, $dy) = $self->_get_deltas_upon_jung($jung);
        $self->{_dx} = $dx;
        $self->{_dy} = $dy;

        my $stack = $self->{_stacks}->[$si];
        my $elem_num = ($stack) ? scalar @{$stack} : 0;
        if ($elem_num < REQUIRED_ELEM_NUMS->[$cho]) {
            $self->{_dx} = -($self->{_dx});
            $self->{_dy} = -($self->{_dy});
        }
        else {
            if ($cho == 2) { # ã„´
                my $m = $self->_pop($si);
                my $n = $self->_pop($si);
                $self->_push($si, int($n/$m));
            }
            elsif ($cho == 3) { # ã„·
                my $m = $self->_pop($si);
                my $n = $self->_pop($si);
                $self->_push($si, $n+$m);
            }
            elsif ($cho == 16) { # ㅌ
                my $m = $self->_pop($si);
                my $n = $self->_pop($si);
                $self->_push($si, $n-$m);
            }
            elsif ($cho == 4) { # ㄸ
                my $m = $self->_pop($si);
                my $n = $self->_pop($si);
                $self->_push($si, $n*$m);

lib/Acme/Aheui.pm  view on Meta::CPAN

        unshift @$stack, $first;
    }
    elsif ($i == 27) { # ã…Ž
        return;
    }
    else {
        my $last = $$stack[-1];
        push @$stack, $last;
    }
}

sub _swap {
    my ($self, $i) = @_;
    my $stack = $self->{_stacks}->[$i];

    if ($i == 21) { # ã…‡
        my $first = $$stack[0];
        my $second = $$stack[1];
        $$stack[0] = $second;
        $$stack[1] = $first;
    }
    elsif ($i == 27) { # ã…Ž
        return;
    }
    else {
        my $last = $$stack[-1];
        my $next = $$stack[-2];
        $$stack[-1] = $next;
        $$stack[-2] = $last;
    }
}

sub _output_number {
    my ($self, $number) = @_;

    print $number;
}

sub _output_code_as_character {
    my ($self, $code) = @_;

    my $unichar = pack 'U', $code;
    print encode($self->{_encoding}, $unichar);
}

sub _get_input_character_as_code {
    my ($self) = @_;

    my $char = ReadKey(0);
    return unpack 'U', $char;
}

sub _get_input_number {
    my ($self) = @_;

    return int(ReadLine(0));
}

=head1 INSTALLATION

To install this module, run the following commands:

    perl Build.PL
    ./Build
    ./Build test
    ./Build install

=head1 AUTHOR

Rakjin Hwang, C<< <rakjin@cpan.org> >>

=head1 LICENSE

This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.

=cut

1;