/usr/share/perl5/Math/Calc/Units/Convert/Multi.pm is in libmath-calc-units-perl 1.07-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 | package Math::Calc::Units::Convert::Multi;
use base 'Exporter';
use vars qw(@EXPORT_OK);
BEGIN {
@EXPORT_OK = qw(to_canonical simple_convert singular
variants major_variants
major_pref range_score pref_score
get_class construct);
};
require Math::Calc::Units::Convert::Time;
require Math::Calc::Units::Convert::Byte;
require Math::Calc::Units::Convert::Date;
require Math::Calc::Units::Convert::Distance;
require Math::Calc::Units::Convert::Combo;
use strict;
use vars qw(@UnitClasses);
@UnitClasses = qw(Math::Calc::Units::Convert::Time
Math::Calc::Units::Convert::Byte
Math::Calc::Units::Convert::Date
Math::Calc::Units::Convert::Distance
Math::Calc::Units::Convert::Combo);
# to_canonical : unit -> value
#
sub to_canonical {
my ($unit) = @_;
my $val = 1;
my %newUnit;
while (my ($unitName, $power) = each %$unit) {
my ($mult, $canon) = name_to_canonical($unitName);
$val *= $mult ** $power;
if (ref $canon) {
# Uh oh, it was a combination of basic types
my $c = to_canonical($canon);
$val *= $c->[0] ** $power;
while (my ($name, $subPower) = each %{ $c->[1] }) {
if (($newUnit{$name} += $subPower * $power) == 0) {
delete $newUnit{$name};
}
}
} else {
if (($newUnit{$canon} += $power) == 0) {
delete $newUnit{$canon};
}
}
}
return [ $val, \%newUnit ];
}
# name_to_canonical : unitName -> value x baseUnit
#
# Memoizing this doubles the speed of the test suite.
#
my %CANON_CACHE;
sub name_to_canonical {
my $unitName = shift;
$CANON_CACHE{$unitName} ||= [ _name_to_canonical($unitName) ];
return @{ $CANON_CACHE{$unitName} };
}
sub _name_to_canonical {
my ($unitName) = @_;
# First, check for compound units
if (my $v = Math::Calc::Units::Convert::Combo->lookup_compound($unitName)) {
return @$v;
}
foreach my $uclass (@UnitClasses) {
if (my ($val, $base) = $uclass->to_canonical($unitName)) {
return ($val, $base);
}
}
return Math::Calc::Units::Convert::Base->to_canonical($unitName);
}
sub get_class {
my ($unitName) = @_;
my (undef, $canon) = name_to_canonical($unitName);
foreach my $uclass (@UnitClasses) {
my $canon_unit = $uclass->canonical_unit();
next if ! defined $canon_unit;
return $uclass if $canon_unit eq $canon;
}
return 'Math::Calc::Units::Convert::Base';
}
sub simple_convert {
my ($u, $v) = @_;
foreach my $uclass (@UnitClasses) {
my $c;
return $c if $c = $uclass->simple_convert($u, $v);
}
return;
}
sub singular {
my ($unitName) = @_;
return get_class($unitName)->singular($unitName);
}
sub variants {
my ($base) = @_;
return get_class($base)->variants($base);
}
sub major_variants {
my ($base) = @_;
return get_class($base)->major_variants($base);
}
sub major_pref {
my ($base) = @_;
return get_class($base)->major_pref($base);
}
sub range_score {
my ($val, $unitName) = @_;
die if ref $unitName;
return get_class($unitName)->range_score($val, $unitName);
}
sub pref_score {
my ($unitName) = @_;
die if ref $unitName;
return get_class($unitName)->pref_score($unitName);
}
sub construct {
my ($constructor, $args) = @_;
foreach my $uclass (@UnitClasses) {
my $c;
return $c if $c = $uclass->construct($constructor, $args);
}
return;
}
1;
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