# if($opt_h)
    # if($opt_O)
            # if($opt_O =~ /^connection$|^conn$|^c$/i)
                # elsif ($opt_O =~ /^operation$|^op$|^o$/i)
                # elsif ($opt_O =~ /^sort$|^so$/i)
                # elsif ($opt_O =~ /^statistics$|^statistic$|^stats$|^stat$|^st$/i)
                # elsif ($opt_O =~ /^e|^echo$/i)
                # else 
        # else 
    # if($opt_S =~ /^(\d+)\/([A-Za-z]+)\/(\d+)\:(\d+):(\d+):(\d+)$/)
        # elsif ($opt_S =~ /^(\d+):(\d+):(\d+)$/)
        # else 
            # if($opt_S)
    # if($opt_E =~ /^(\d+)\/([A-Za-z]+)\/(\d+)\:(\d+):(\d+):(\d+)$/)
        # elsif ($opt_E =~ /^(\d+):(\d+):(\d+)$/)
        # else 
            # if($opt_E)
    # if($opt_S)
            # if($lower_yr)
    # if($opt_E)
            # if($upper_yr)
    # if($output_format =~ /^connection$|^operation$/)
            # unless($ARGV[0])
            # if($ARGV[1])
                # else 
        # elsif ($output_format =~ /^sort$|^echo$|^stat$/)
            # if($ARGV[0])
                # else 
##</code><code>##

    # if($output_format eq 'operation')
            # while(<ACCESS_LOG>)
            # if($opt_v)
                    # foreach(keys(%pending))
    # if($output_format eq 'connection')
            # while(<ACCESS_LOG>)
            # if($opt_v)
                    # foreach(keys(%pending))
    # if($output_format eq 'sort')
            # while(<ACCESS_LOG>)
            # foreach(@conn_nums)
    # if($output_format eq 'stat')
            # while(<ACCESS_LOG>)
            # if($result_count > 0)
                # else 
    # if($output_format eq 'echo')
            # while(<ACCESS_LOG>)
    # if($in_file)