use strict;
use warnings;
use autodie;

use constant USAGE => <<"EOT";
usage:
    perl $0  file_in  file_zero file_one
where:
    file_in     input file name
    file_zero   output file name - address[0] bit == 0
    file_one    output file name - address[0] bit == 1
EOT

die USAGE if @ARGV != 3;

my ($file_in, $file_zero, $file_one) = @ARGV;

my $rx_cmd_rw = qr{ cmd:SDP_CMD_ (?: RDBLKL | WRSIZEDFULL) }xms;

open my $fh_in, '<', $file_in;

open my $fh_0, '>', $file_zero;
open my $fh_1, '>', $file_one;

my $fh_current;

LINE:
while (my $line = <$fh_in>) {

    next LINE unless $line =~ m{ \S }xms;  # ignore blank lines

    my $got_cmd_addr =
    my ($cmd_addr_in_hex) =
    $line =~ m{ $rx_cmd_rw .*? addr:0x ([[:xdigit:]]+) }xms;

    if ($got_cmd_addr) {
        $fh_current = 0x1 & hex $cmd_addr_in_hex ? $fh_1 : $fh_0;
        }

    die "no command read/write address seen" unless $fh_current;

    print $fh_current $line;

    }

close $fh_in;
close $fh_0;
close $fh_1;

exit;

# subroutines ######################################################

# none for now