/usr/lib/x86_64-linux-gnu/perl5/5.26/Sort/Key/Types.pm is in libsort-key-perl 1.33-2.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 | package Sort::Key::Types;
our $VERSION = '1.30';
use strict;
use warnings;
use Carp;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT_OK = qw(register_type);
our $DEBUG;
$DEBUG ||= 0;
# this hash is also used from Sort::Key::Multi to find out which
# letters can be used as types:
our %mktypes = ( s => 0,
l => 1,
n => 2,
i => 3,
u => 4 );
sub _mks2n {
if (my ($rev, $key)=$_[0]=~/^([-+]?)(.)$/) {
exists $mktypes{$key}
or croak "invalid multi-key type '$_[0]'";
my $n = $mktypes{$key};
$n+=128 if $rev eq '-';
return $n
}
die "internal error, bad key '$_[0]'";
}
our %mkmap = qw(str s
string s
locale l
loc l
lstr l
int i
integer i
uint u
unsigned_integer u
number n
num n);
$_ = [$_] for (values %mkmap);
our %mksub = map { $_ => undef } keys %mkmap;
sub _get_map {
my ($rev, $name) = $_[0]=~/^([+-]?)(.*)$/;
exists $mkmap{$name}
or croak "unknown key type '$name'\n";
if ($rev eq '-') {
return map { /^-(.*)$/ ? $1 : "-$_" } @{$mkmap{$name}}
}
@{$mkmap{$name}}
}
sub _get_sub {
$_[0]=~/^[+-]?(.*)$/;
exists $mksub{$1}
or croak "unknown key type '$1'\n";
return $mksub{$1}
}
sub _combine_map { map { _get_map $_ } @_ }
use constant _nl => "\n";
sub combine_types { pack('C*', (map { _mks2n $_ } _combine_map(@_))) }
sub combine_sub {
my $sub = shift;
my $for = shift;
$for = defined $for ? " for $for" : "";
my @subs = map { _get_sub $_ } @_;
if ($sub) {
my $code = 'sub { '._nl;
if (ref $sub eq 'CODE') {
unless (grep { defined $_ } @subs) {
return $sub
}
$code.= 'my @keys = &{$sub};'._nl;
}
else {
if ($sub eq '@_') {
return undef unless grep {defined $_} @subs;
}
$code.= 'my @keys = '.$sub.';'._nl;
}
$code.= 'print "in: |@keys|\n";'._nl if $DEBUG;
$code.= '@keys == '.scalar(@_)
. ' or croak "wrong number of keys generated$for '
. '(expected '.scalar(@_).', returned ".scalar(@keys).")";'._nl;
{ # new scope so @map doesn't get captured
my @map = _combine_map @_;
if (@map==@_) {
for my $i (0..$#_) {
if (defined $subs[$i]) {
$code.= '{ local $_ = $keys['.$i.']; ($keys['.$i.']) = &{$subs['.$i.']}() }'._nl;
}
}
$code.='print "out: |@keys|\n";'._nl if $DEBUG;
$code.='return @keys'._nl;
}
else {
$code.='my @keys1;'._nl;
for my $i (0..$#_) {
if (defined $subs[$i]) {
$code.= '{ local $_ = shift @keys; push @keys1, &{$subs['.$i.']}() }'._nl;
}
else {
$code.= 'push @keys1, shift @keys;'._nl;
}
}
$code.='print "out: |@keys1|\n";'._nl if $DEBUG;
$code.='return @keys1'._nl;
}
}
$code.='}'._nl;
print "CODE$for:\n$code----\n" if $DEBUG >= 2;
my $map = eval $code;
$@ and die "internal error: code generation failed ($@)";
return $map;
}
else {
@_==1 or croak "too many keys or keygen subroutine undefined$for";
return @subs;
}
}
sub register_type {
my $name = shift;
my $sub = shift;
$name=~/^\w+(?:::\w+)*$/
or croak "invalid type name '$name'";
@_ or
croak "too few keys";
(exists $mkmap{$name} or exists $mktypes{$name})
and croak "type '$name' already registered or reserved in ".__PACKAGE__;
$mkmap{$name} = [ _combine_map @_ ];
$mksub{$name} = combine_sub $sub, $name, @_;
()
}
1;
__END__
=head1 NAME
Sort::Key::Types - handle Sort::Key data types
=head1 SYNOPSIS
use Sort::Key::Types qw(register_type);
register_type(Color => sub { $_->R, $_->G, $_->B }, qw(int, int, int));
# you better
# use Sort::Key::Register ...
=head1 DESCRIPTION
The L<Sort::Key> family of modules can be extended to support new key
types using this module (or the more friendly L<Sort::Key::Register>).
=head2 FUNCTIONS
The following functions are provided:
=over 4
=item Sort::Key::register_type($name, \&gensubkeys, @subkeystypes)
registers a new datatype named C<$name> defining how to convert it to
a multi-key.
C<&gensubkeys> should convert the object of type C<$name> passed on
C<$_> to a list of values composing the multi-key.
C<@subkeystypes> is the list of types for the generated multi-keys.
For instance:
Sort::Key::Types::register_type
'Person',
sub { $_->surname,
$_->name,
$_->middlename },
qw(str str str);
Sort::Key::Types::register_type
'Color',
sub { $_->R, $_->G, $_->B },
qw(int int int);
Once a datatype has been registered it can be used in the same way
as types supported natively, even for defining new types, i.e.:
Sort::Key::Types::register_type
'Family',
sub { $_->father, $_->mother },
qw(Person Person);
=back
=head1 SEE ALSO
L<Sort::Key>, L<Sort::Key::Merger>, L<Sort::Key::Register>.
=head1 COPYRIGHT AND LICENSE
Copyright (C) 2005-2007, 2014 by Salvador FandiE<ntilde>o,
E<lt>sfandino@yahoo.comE<gt>.
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself, either Perl version 5.8.4 or,
at your option, any later version of Perl 5 you may have available.
=cut
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