# Copyright 2009, 2010, 2012, 2014 Kevin Ryde
# This file is part of I18N-Langinfo-Wide.
#
# I18N-Langinfo-Wide is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# I18N-Langinfo-Wide is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License along
# with I18N-Langinfo-Wide. If not, see <http://www.gnu.org/licenses/>.
package POSIX::Wide::ERRNO;
use 5.008001; # for utf8::is_utf8()
use strict;
use warnings;
use I18N::Langinfo::Wide;
use Scalar::Util;
# uncomment this to run the ### lines
#use Smart::Comments;
our $VERSION = 8;
sub TIESCALAR {
my ($class) = @_;
my $self;
return bless \$self, $class;
}
# dualvar() in Scalar::Util 1.22 (post perl 5.10.1) will propagate the
# utf8 flag on its own, for prior versions must turn it on explicitly
#
BEGIN {
if (do { my $u = 'x';
utf8::upgrade($u);
my $e = Scalar::Util::dualvar(0,$u);
utf8::is_utf8($e) }) {
### dualvar() is utf8
eval "\n#line ".(__LINE__+1)." \"".__FILE__."\"\n" . <<'HERE' or die;
sub FETCH {
return Scalar::Util::dualvar
($!, I18N::Langinfo::Wide::to_wide("$!"));
}
1;
HERE
} else {
### dualvar() is not utf8, using _utf8_on()
require Encode;
eval "\n#line ".(__LINE__+1)." \"".__FILE__."\"\n" . <<'HERE' or die;
sub FETCH {
my $e = Scalar::Util::dualvar
($!, I18N::Langinfo::Wide::to_wide("$!"));
Encode::_utf8_on($e);
return $e;
}
1;
HERE
}
}
sub STORE {
my ($self, $value) = @_;
$! = $value;
}
1;
__END__
=for stopwords POSIX Ryde Langinfo
=head1 NAME
POSIX::Wide::ERRNO -- an internal part of POSIX::Wide
=head1 DESCRIPTION
This is the tie class used to implement the wide C<$ERRNO> variable in
C<POSIX::Wide>. It's not designed for external use.
=head1 SEE ALSO
L<POSIX>, L<perltie>
=head1 HOME PAGE
L<http://user42.tuxfamily.org/i18n-langinfo-wide/index.html>
=head1 LICENSE
I18N-Langinfo-Wide is Copyright 2009, 2010, 2012, 2014 Kevin Ryde
I18N-Langinfo-Wide is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any later
version.
I18N-Langinfo-Wide is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
more details.
You should have received a copy of the GNU General Public License along with
I18N-Langinfo-Wide. If not, see L<http://www.gnu.org/licenses/>.
=cut