use strict;
use warnings;
my @labels = ({label=>'compressed',start=>3}, {label=>'deleted',start=
+>6},
{label=>'this',start=>7}, {label=>'that',start=>12},
{label=>'other',start=>18}, {label=>'something else',sta
+rt=>20},
{label=>'and another',start=>30}, {label=>'foo',start=>4
+5},
{label=>'bar',start=>47}, {label=>'up',start=>63},
{label=>'down',start=>64}, {label=>'sideways',start=>65}
+);
print "0b0x00xx0000x00000x0x000000000x00000000000000x0x000000000000000
+xxx\n";
my (@lines);
# for each label
LOOP: foreach my $lab (@labels) {
# look thru the available lines
foreach my $line (@lines) {
my $delta = $lab->{start} - length($line);
# for a line shorter than start
if ($delta >= 0) {
# and tack the label on there
$line .= ' ' x $delta . '|' . $lab->{label};
next LOOP;
}
# or fit into empty space on existing line
my $len = length($lab->{label}) + 1;
if (substr($line, $lab->{start}, $len) eq ' ' x $len) {
substr($line, $lab->{start}, $len,'|' . $lab->{label});
next LOOP;
}
}
# or create a new line if needed
push @lines, ' ' x $lab->{start} . '|' . $lab->{label};
}
print "$_\n" for @lines;
UPDATE: added comments, added fitting new label into blank space, improved flow
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