File Coverage

blib/lib/POSIX/Wide/EXTENDED_OS_ERROR.pm

Criterion	Covered	Total	%
statement	22	26	84.6
branch	2	6	33.3
condition			n/a
subroutine	7	8	87.5
pod			n/a
total	31	40	77.5

# Copyright 2009, 2010, 2012, 2014 Kevin Ryde

# This file is part of POSIX-Wide.
#
# POSIX-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.
#
# POSIX-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 POSIX-Wide.  If not, see .

package POSIX::Wide::EXTENDED_OS_ERROR;
use 5.008001;  # for utf8::is_utf8()
use strict;
use warnings;
use Scalar::Util;

# uncomment this to run the ### lines
#use Smart::Comments;

our $VERSION = 10;

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
#
# $^E fetching in Perl_magic_get():
#
#     $^E on MacOS is GetSysErrText.  Is that mac-roman maybe?
#
#     $^E on VMS is sys$getmsg.  Is that the selected NLS thingie?
#
#     $^E on ms-dos is GetLastError.
#
#     $^E on OS2 is DosGetMessage or OSO001.MSG.
#
BEGIN {
  if (do { my $u = 'x';
           utf8::upgrade($u);
           my $e = Scalar::Util::dualvar(0,$u);
           utf8::is_utf8($e) }) {
    ### dualvar() is utf8
    eval "\n#line ".(__LINE__+1)." \"".__FILE__."\"\n" . <<'HERE' or die;
      sub FETCH {
        return Scalar::Util::dualvar
                 ($^E, POSIX::Wide::_to_wide("$^E"));
      }
      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 $e = Scalar::Util::dualvar
                  ($^E, POSIX::Wide::_to_wide("$^E"));
        Encode::_utf8_on($e);
        return $e;
      }
      1;
HERE
  }
}

sub STORE {
  my ($self, $value) = @_;
  $^E = $value;
}

1;
__END__