On 2020-02-03 13:51, ToddAndMargo via perl6-users wrote:
Hi All,
Is ther a way to get
$ p6 'my uint8 $u = 84; printf "\$u = <%08s>\n", $u;'
$u = <00000084>
to print
$u = <0000_0084>
?
Many thanks,
-T
Hi All,
Just to torment myself, I wrote a sub to do this:
.......................................
sub sbprint( UInt $b ) {
my $bits = $b.UInt.msb + 1;
my $bytes = $bits div 8;
if ($bits % 8 ) > 0 { $bytes += 1 };
# say "bits = $bits bytes = $bytes";
my Str $bitstr = "";
loop ( my $i = 0; $i < $bytes; $i += 1 ) {
my $j = ( $b +> ( $i * 8 ) ) +& 0xFF;
my $k = sprintf "_%08s", $j.base(2);
# say "b = $b.base(2) i = $i j = $j.base(2) k = $k";
$bitstr = $k ~ $bitstr;
# say $bitstr;
}
$bitstr = "0b" ~ $bitstr;
$bitstr ~~ s/ 0b_ /0b/;
return $bitstr;
}
say sbprint 0x04F842;
say 0x04F842.base(2);
.......................................
$ intTest.pl6
0b00000100_11111000_01000010
100 11111000 01000010 # spaces added by me
