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# This code is part of Perl distribution Mail-Message version 4.01.
# The POD got stripped from this file by OODoc version 3.05.
# For contributors see file ChangeLog.
# This software is copyright (c) 2001-2025 by Mark Overmeer.
# This is free software; you can redistribute it and/or modify it under
# the same terms as the Perl 5 programming language system itself.
# SPDX-License-Identifier: Artistic-1.0-Perl OR GPL-1.0-or-later
package Mail::Box::Parser::Lines;{
our $VERSION = '4.01';
}
use parent 'Mail::Box::Parser';
use strict;
use warnings;
use Log::Report 'mail-message', import => [ qw/__x panic warning/ ];
use Mail::Message::Field ();
#--------------------
sub init(@)
{ my ($self, $args) = @_;
$self->SUPER::init($args);
$self->{MBPL_lines} = $args->{lines} or panic "No lines";
$self->{MBPL_source} = $args->{source} or panic "No source";
$self;
}
#--------------------
sub lines() { $_[0]->{MBPL_lines} }
sub source() { $_[0]->{MBPL_source} }
#--------------------
my $is_empty_line = qr/^\015?\012?$/;
sub readHeader()
{ my $self = shift;
my $lines = $self->lines;
my @ret;
LINE:
while(@$lines)
{ my $line = shift @$lines;
last if $line =~ $is_empty_line;
my ($name, $body) = split /\s*\:\s*/, $line, 2;
unless(defined $body)
{ warning __x"unexpected end of header in {source}:\n {line}", source => $self->source, line => $line;
if(@ret && $self->fixHeaderErrors)
{ $ret[-1][1] .= ' '.$line; # glue err line to previous field
next LINE;
}
unshift @$lines, $line;
last LINE;
}
# Collect folded lines
$body .= shift @$lines
while @$lines && $lines->[0] =~ m!^[ \t]!;
push @ret, [ $name, $body ];
}
(undef, undef, @ret);
}
sub _is_good_end()
{ my $self = shift;
# No seps, then when have to trust it.
my $sep = $self->activeSeparator // return 1;
# Find first non-empty line on specified location.
my $lines = $self->lines;
my $skip = 0;
while($skip < @$lines && $lines->[$skip] =~ $is_empty_line) { $skip++ }
$skip < @$lines or return 1;
my $line = $lines->[$skip];
substr($line, 0, length $sep) eq $sep
&& ($sep ne 'From ' || $line =~ m/ (?:19[6-9]|20[0-3])[0-9]\b/ );
}
sub readSeparator()
{ my $self = shift;
my $sep = $self->activeSeparator // return ();
my $lines = $self->lines;
my $skip = 0;
while($skip < @$lines && $lines->[$skip] =~ $is_empty_line) { $skip++ }
$skip < @$lines
or return ();
my $line = $lines->[$skip];
substr($line, 0, length $sep) eq $sep
or return ();
splice @$lines, 0, $skip+1;
(undef, $line);
}
sub _read_stripped_lines(;$$)
{ my ($self, $exp_chars, $exp_lines) = @_;
my $seps = $self->separators;
my $lines = $self->lines;
my $take = [];
if(@$seps)
{
LINE:
while(1)
{ my $line = shift @$lines or last LINE;
foreach my $sep (@$seps)
{ substr($line, 0, length $sep) eq $sep or next;
# Some apps fail to escape take starting with From
next if $sep eq 'From ' && $line !~ m/ 19[789][0-9]| 20[0-9][0-9]/;
unshift @$lines, $line; # keep separator
last LINE;
}
push @$take, $line;
}
if(@$take && $take->[-1] =~ s/\015?\012\z//)
{ # Keep an empty line to signal the existence of a preamble, but
# remove a second.
pop @$take if @$seps==1 && @$take > 1 && length($take->[-1])==0;
}
}
else # File without separators.
{ $take = $lines;
}
if($self->stripGt)
{ s/^\>(\>*From\s)/$1/ for @$take;
}
unless($self->trusted)
{ s/\015// for @$take;
}
$take;
}
sub bodyAsString(;$$)
{ my ($self, $exp_chars, $exp_lines) = @_;
my $take = $self->_read_stripped_lines($exp_chars, $exp_lines);
return (undef, undef, join('', @$take));
}
sub bodyAsList(;$$)
{ my ($self, $exp_chars, $exp_lines) = @_;
my $take = $self->_read_stripped_lines($exp_chars, $exp_lines);
(undef, undef, $take);
}
sub bodyAsFile($;$$)
{ my ($self, $out, $exp_chars, $exp_lines) = @_;
my $take = $self->_read_stripped_lines($exp_chars, $exp_lines);
$out->print($_) for @$take;
(undef, undef, scalar @$take);
}
1;
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