#!/usr/bin/perl -w

package SCX::LogReader;

use strict;

sub new {
	my ($class, $args) = @_;

	open my $fh, '<', $args->{filename}
		or die "Can't open $args->{filename}: $!";
	
	my $self = {
		begin_time => $args->{begin_time} || 0,
		end_time   => $args->{end_time}   || (1<<32),
		fh         => $fh,
	};

	bless $self, $class;

	return $self;
}

sub get_data {
	my ($self) = @_;

	my $fh = $self->{fh};

	my ($line, $l_time, @data);
	do {
		$line = <$fh>;
		if (!defined $line) {
			print STDERR "End of the log file reached.\n";
			return ();
		}

		chomp $line;
		$line =~ s/\A\s+//xms;

		($l_time, @data) = split(/\s+/, $line);
	} while ($l_time < $self->{begin_time});

	if ($l_time > $self->{end_time}) {
		print STDERR "Requested end time reached.\n";
		return ();
	}

	return ($l_time, map { hex $_ } @data);
}

1;