# -*- perl -*-
#
#   $Id: server,v 1.2 1999/04/09 19:56:24 joe Exp $
#
#   This example implements a very simple server, let's call it
#   multiplier. When a client connects, it waits for decimal numbers
#   as input. These numbers are written back, multiplied by 2.
#

require 5.004;
use strict;

use lib qw(blib/arch blib/lib);


$| = 1;

require Net::Daemon::Test;
require IO::Socket;

package Multiplier;

use vars qw($VERSION @ISA);

$VERSION = '0.01';
@ISA = qw(Net::Daemon::Test);


sub Version ($) {
    return "Multiplier - A simple network calculator; 1998, Jochen Wiedmann";
}

sub GetLine {
    my $sock = shift;
    $sock->getline();
}

sub Print {
    my $sock = shift;
    $sock->print(@_) && $sock->flush();
}

sub Run ($) {
    my $self = shift;
    my($line, $sock);
    $sock = $self->{'socket'};
    eval {
	while (1) {
	    if (!defined($line = GetLine($sock))) {
		if ($sock->error()) {
		    die "Client connection error " . $sock->error() . " ($!)";
		}
		last;
	    }
	    my $num;
	    {
		my $lock = lock($Net::Daemon::RegExpLock)
		    if ($self->{'mode'} eq 'threads');
		if ($line =~ /(\d+)/) {
		    $num = $1;
		}
	    }
	    if (defined($num)) {
		if (!Print($sock, $num*2, "\n")) {
		    die "Client connection error " . $sock->error() .
			" ($!) while writing.";
		}
	    } else {
		die "Server cannot parse input: $line";
	    }
	}
    };
    if ($@) {
	print STDERR "$@\n";
	$self->Error($@);
    }
    $sock->close();
}


package main;

my $server = Multiplier->new({ 'pidfile' => 'none'
			       }, \@ARGV);

$server->Bind();