File Coverage

blib/lib/Lingua/SU/Nums2Words.pm

Criterion	Covered	Total	%
statement	70	70	100.0
branch	28	32	87.5
condition	47	63	74.6
subroutine	13	13	100.0
pod	2	2	100.0
total	160	180	88.8

package Lingua::SU::Nums2Words;

our $DATE = '2015-09-03'; # DATE
our $VERSION = '0.04'; # VERSION

use 5.010001;
use strict;
use warnings;
use utf8;

require Exporter;
our @ISA       = qw(Exporter);
our @EXPORT_OK = qw(nums2words nums2words_simple);

our %SPEC;

use vars qw(
    $Dec_char
    $Neg_word
    $Dec_word
    $Exp_word
    $Zero_word
    %Digit_words
    %Mult_words
);

$Dec_char  = ".";
$Neg_word  = "négatif";
$Dec_word  = "koma";
$Exp_word  = "dikali sa-puluh pangkat";
$Zero_word = "kosong";

%Digit_words = (
    0 => $Zero_word,
    1 => 'hiji',
    2 => 'dua',
    3 => 'tilu',
    4 => 'opat',
    5 => 'lima',
    6 => 'genep',
    7 => 'tujuh',
    8 => 'dalapan',
    9 => 'salapan'
);

%Mult_words = (
    0 => '',
    1 => 'rébu',
    2 => 'juta',
    3 => 'miliar',
    4 => 'triliun'
    #5 => 'biliun', # suspect? from id.wikipedia
);

$SPEC{nums2words} = {
    v => 1.1,
    summary => 'Convert number to Sundanese verbage',
    description => <<'_',

This is akin to converting 123 to "a hundred and twenty three" in English.
Currently can handle real numbers in normal and scientific form in the order of
hundreds of trillions. It also preserves formatting in the number string (e.g,
given "1.00" `nums2words` will pronounce the zeros.

_
    args => {
        num => {
            schema => 'str*',
            summary => 'The number to convert',
            req => 1,
            pos => 0,
        },
    },
    args_as => 'array',
    result_naked => 1,
};
sub nums2words($) { _join_it(_handle_scinotation(@_)) }

$SPEC{nums2words_simple} = {
    v => 1.1,
    summary => 'Like nums2words but only pronounce the digits',
    description => <<'_',

This is akin to converting 123 to "one two three" in English.

_
    args => {
        num => {
            schema => 'str*',
            summary => 'The number to convert',
            req => 1,
            pos => 0,
        },
    },
    args_as => 'array',
    result_naked => 1,
};
sub nums2words_simple($) { _join_it(_handle_dec(@_)) }

sub _handle_scinotation($) {
    my $num = shift;
    my @words;

    $num =~ /^(.+)[Ee](.+)$/ and
    @words = (_handle_neg_dec($1), $Exp_word, _handle_neg_dec($2)) or
    @words = _handle_neg_dec($num);

    @words;
}

sub _handle_neg_dec($) {
    my $num = shift;
    my $is_neg;
    my @words = ();

    $num < 0 and $is_neg++;
    $num =~ s/^[\s\t]*[+-]*(.*)/$1/;

    $num =~ /^(.+)\Q$Dec_char\E(.+)$/o and
    @words = (_handle_int($1), $Dec_word, _handle_dec($2)) or

    $num =~ /^\Q$Dec_char\E(.+)$/o and
    @words = ($Digit_words{0}, $Dec_word, _handle_dec($1)) or

    $num =~ /^(.+)(?:\Q$Dec_char\E)?$/o and
    @words = _handle_int($1);

    $is_neg and
        unshift @words, $Neg_word;

    @words;
}

# handle digits before decimal
sub _handle_int($) {
    my $num = shift;
    my @words = ();
    my $order = 0;
    my $t;

    while($num =~ /^(.*?)([\d\D*]{1,3})$/) {
        $num = $1;
        ($t = $2) =~ s/\D//g;
        unshift @words, $Mult_words{$order} if $t > 0;
        unshift @words, _handle_thousand($t, $order);
        $order++;
    }

    @words = ($Zero_word) if not join('',@words)=~/\S/;
    @words;
}

sub _handle_thousand($$) {
    my $num = shift;
    my $order = shift;
    my @words = ();

    my $n1 = $num % 10;
    my $n2 = ($num % 100 - $n1) / 10;
    my $n3 = ($num - $n2*10 - $n1) / 100;

    $n3 == 0 && $n2 == 0 && $n1 > 0 and (
        $n1 == 1 && $order == 1 and @words = ("sa-") or
        @words = ($Digit_words{$n1}) );

    $n3 == 1 and @words = ("sa-ratus") or
    $n3 >  1 and @words = ($Digit_words{$n3}, "ratus");

    $n2 == 1 and (
        $n1 == 0 and push(@words, "sa-puluh") or
        $n1 == 1 and push(@words, "sa-belas") or
        push(@words, $Digit_words{$n1}, "belas")
    );

    $n2 > 1 and do {
        push @words, $Digit_words{$n2}, "puluh";
        push @words, $Digit_words{$n1} if $n1 > 0;
    };

    $n3 > 0 && $n2 == 0 && $n1 > 0 and
    push @words, $Digit_words{$n1};

    $n3 != 0 || $n2 != 0 || $n1 != 0 and
    @words;
}

# handle digits after decimal
sub _handle_dec($) {
    my $num = shift;
    my @words = ();
    my $i;
    my $t;

    for( $i=0; $i<=length($num)-1; $i++ ) {
        $t = substr($num, $i, 1);
        exists $Digit_words{$t} and
        push @words, $Digit_words{$t};
    }

    @words = ($Zero_word) if not join('',@words)=~/\S/;
    @words;
}

# join array of words, also join (se, ratus) -> seratus, etc.
sub _join_it(@) {
    my $words = '';
    my $w;

    while(defined( $w = shift )) {
        $words .= $w;
        $words .= ' ' unless not length $w or $w eq 'se' or not @_;
    }
    $words =~ s/^\s+//;
    $words =~ s/\s+$//;
    $words;
}

1;
# ABSTRACT: Convert number to Sundanese verbage

__END__