>perl -wMstrict -le
"my $bits = unpack 'b*', pack 'N*', 0x01020304, 0x11121314;
 print qq{'$bits'};
 ;;
 my @n =
   map { my $l = length;  chop eq '1' ? -$l : $l; }
   $bits =~ m{ 0+ | 1+ }xmsg
   ;
 print qq{@n};
"
'1000000001000000110000000010000010001000010010001100100000101000'
-1 8 -1 6 -2 8 -1 5 -1 3 -1 4 -1 2 -1 3 -2 2 -1 5 -1 1 -1 3