PerlIO::via::EscStatus::ShowNone - suppress all status lines

PerlIO-via-EscStatus documentation Contained in the PerlIO-via-EscStatus distribution.

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NAME

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PerlIO::via::EscStatus::ShowNone - suppress all status lines

SYNOPSIS

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 use PerlIO::via::EscStatus::ShowNone;
 binmode (STDOUT, ':via(EscStatus::ShowNone)') or die;

DESCRIPTION

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EscStatus::ShowNone is a variant of the EscStatus layer which doesn't show any status lines coming through the stream at all, only the ordinary output. This can be used for a batch mode or non-interactive mode in a program.

Of course for batch mode it's also possible simply not to print statuses in the first place. You can decide whether it's easier to check a mode flag at the print, or push a layer to strip what's printed. A layer may be easier for suppressing prints from a library or independent parts of a program.

SEE ALSO

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PerlIO::via::EscStatus, PerlIO::via

HOME PAGE

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http://user42.tuxfamily.org/perlio-via-escstatus/index.html

LICENSE

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Copyright 2008, 2009, 2010, 2011 Kevin Ryde

PerlIO-via-EscStatus 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.

PerlIO-via-EscStatus 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 PerlIO-via-EscStatus. If not, see http://www.gnu.org/licenses/.

PerlIO-via-EscStatus documentation Contained in the PerlIO-via-EscStatus distribution. 
# Copyright 2008, 2009, 2010, 2011 Kevin Ryde

# This file is part of PerlIO-via-EscStatus.
#
# PerlIO-via-EscStatus 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.
#
# PerlIO-via-EscStatus 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 PerlIO-via-EscStatus.  If not, see <http://www.gnu.org/licenses/>.

package PerlIO::via::EscStatus::ShowNone;
use 5.008;
use strict;
use warnings;
use PerlIO::via::EscStatus;
use PerlIO::via::EscStatus::Parser;

our $VERSION = 10;

use constant DEBUG => 0;

sub PUSHED {
  my ($class, $mode, $fh) = @_;
  if (DEBUG) {
    require Data::Dumper;
    print STDERR "pushed ", Data::Dumper::Dumper ([$class,$mode,$fh]);
  }
  return bless { parser => PerlIO::via::EscStatus::Parser->new
               }, $class;
}

*UTF8 = \&PerlIO::via::EscStatus::UTF8;
*FLUSH = \&PerlIO::via::EscStatus::FLUSH;

sub WRITE {
  my ($self, $buf, $fh) = @_;
  my ($status, $output) = $self->{'parser'}->parse($buf);
  print $fh $output or return -1;
  return length($buf);
}

1;
__END__