##
## Package to read/write on ASCII data connections
##

package Net::FTP::A;
use strict;
use vars qw(@ISA $buf $VERSION);
use Carp;

require Net::FTP::dataconn;

@ISA = qw(Net::FTP::dataconn);
$VERSION = "1.18";


sub read {
my $data = shift;
local *buf = \$_[0];
shift;
my $size = shift || croak 'read($buf,$size,[$offset])';
my $timeout = @_ ? shift: $data->timeout;

if (length(${*$data}) < $size && !${*$data}{'net_ftp_eof'}) {
my $blksize = ${*$data}{'net_ftp_blksize'};
$blksize = $size if $size > $blksize;

my $l = 0;
my $n;

READ:
{
my $readbuf = defined(${*$data}{'net_ftp_cr'}) ? "\015" : '';

$data->can_read($timeout)
or croak "Timeout";

if ($n = sysread($data, $readbuf, $blksize, length $readbuf)) {
${*$data}{'net_ftp_bytesread'} += $n;
${*$data}{'net_ftp_cr'} =
substr($readbuf, -1) eq "\015"
? chop($readbuf)
: undef;
}
else {
return undef
unless defined $n;

${*$data}{'net_ftp_eof'} = 1;
}

$readbuf =~ s/\015\012/\n/sgo;
${*$data} .= $readbuf;

unless (length(${*$data})) {

redo READ
if ($n > 0);

$size = length(${*$data})
if ($n == 0);
}
}
}

$buf = substr(${*$data}, 0, $size);
substr(${*$data}, 0, $size) = '';

length $buf;
}


sub write {
my $data = shift;
local *buf = \$_[0];
shift;
my $size = shift || croak 'write($buf,$size,[$timeout])';
my $timeout = @_ ? shift: $data->timeout;

my $nr = (my $tmp = substr($buf, 0, $size)) =~ tr/\r\n/\015\012/;
$tmp =~ s/([^\015])\012/$1\015\012/sg if $nr;
$tmp =~ s/^\012/\015\012/ unless ${*$data}{'net_ftp_outcr'};
${*$data}{'net_ftp_outcr'} = substr($tmp, -1) eq "\015";

# If the remote server has closed the connection we will be signal'd
# when we write. This can happen if the disk on the remote server fills up

local $SIG{PIPE} = 'IGNORE'
unless ($SIG{PIPE} || '') eq 'IGNORE'
or $^O eq 'MacOS';

my $len = length($tmp);
my $off = 0;
my $wrote = 0;

my $blksize = ${*$data}{'net_ftp_blksize'};

while ($len) {
$data->can_write($timeout)
or croak "Timeout";

$off += $wrote;
$wrote = syswrite($data, substr($tmp, $off), $len > $blksize ? $blksize : $len);
return undef
unless defined($wrote);
$len -= $wrote;
}

$size;
}

1;