package Parse::Binary::Nested;
+use 5.010;
use strict;
use warnings;
use Carp;
-our $VERSION = '1.01';
+our $VERSION = '1.02';
sub new {
my ($class, $format) = @_;
: $count."X[$count]$count/($value)";
}
else {
- $value =~ s/=\d*//g; # hardcoded values
- $value =~ s/^C(a)(\d+)/$1 . ($2 + 1)/e; # length prefix
+ $value =~ s/=(?:\d+|.)//g; # hardcoded values
+ $value =~ s{^C/(a)(\d+)}{$1 . ($2 + 1)}e; # maximum length
}
$value;
} reverse 0 .. ($#$format - 1) >> 1;
}
sub convert {
- my ($self, $format, $data) = @_;
+ my ($self, $format, $data, $pos) = @_;
# map flat results into a named and nested hash
my %res;
+ $pos ||= \(my $_pos);
while (my ($field, $template) = splice @$format, 0, 2) {
if (ref $template eq 'ARRAY') {
my ($count, @subformat) = @$template;
+ $$pos++ if $count eq 'C';
my $max = $count =~ s/^(\d+)// ? $1 : 0;
$count = !$count ? $max
: $count eq '*' ? $res{levelcount}->{total} : shift @$data;
- $res{$field}->[$_] = $self->convert([@subformat], $data) for 0 .. ($max || $count)-1;
+ $res{$field}->[$_] = $self->convert([@subformat], $data, $pos)
+ for 0 .. ($max || $count)-1;
splice @{ $res{$field} }, $count if $max > $count;
$res{$field} = $res{$field}->[0] if $max == 1;
next;
}
- elsif ($template =~ /^Ca/) {
- $data->[0] = unpack 'C/a', $data->[0];
- }
- elsif ($template =~ /^(?:[xX]\d*)*$/) {
- next; # no values
- }
- elsif ($template =~ /=(\d+)?/) {
- $res{$field} = $1;
- next;
+ else {
+ for (split m{(?![0-9*/])(?<![/=])}, $template) {
+ my ($type, $count) = m{^(\D+)(\d+)?$} or die 'unsupported';
+ my $mult = $count // 1;
+ given ($type) {
+ when (['c', 'C']) {
+ $$pos += $mult;
+ }
+ when ('x') {
+ $$pos += $mult;
+ next;
+ }
+ when (['b', 'B']) {
+ $$pos++;
+ }
+ when (['s', 'S', 'n', 'v']) {
+ $$pos += $mult * 2;
+ }
+ when (['a', 'A', 'Z', 'a*']) {
+ $$pos += length $data->[0];
+ }
+ when ('Z*') {
+ $$pos += $count // 1 + length $data->[0];
+ }
+ when (['C/a', 'C/A']) {
+ $$pos += 1 + ($count // length $data->[0]);
+ $data->[0] = unpack 'C/a', $data->[0] if defined $count;
+ }
+ when ('=') {
+ unshift @$data, $count;
+ }
+ when ('=.') {
+ unshift @$data, $$pos;
+ }
+ when ('X') {
+ $$pos -= $mult;
+ next;
+ }
+ default {
+ carp "Unrecognised template element '$type'";
+ }
+ }
+ if (defined $res{$field}) {
+ $res{$field} = [ $res{$field} ] unless ref $res{$field} eq 'ARRAY';
+ push @{ $res{$field} }, shift @$data;
+ }
+ else {
+ $res{$field} = shift @$data;
+ }
+ }
}
- $res{$field} = shift @$data;
}
return \%res;
}
my @FORMAT = (
magic => 'a15',
version => 'C',
- name => 'Ca32',
- description => 'Ca64x256',
+ name => 'C/a32',
+ description => 'C/a64x256',
levelcount => [1,
single => 'C',
multi => 'C',
],
finish => [1,
type => 's',
- message => 'Ca255',
- code => 'Ca255',
+ message => 'C/a255',
+ code => 'C/a255',
reserved=> 'x256',
],
hiname => 'a3',
levels => ['*', # levelcount->total actually
- id => 'Ca22',
- name => 'Ca22',
+ id => 'C/a22',
+ name => 'C/a22',
size => 'C',
peas => 'C',
delay => 'C',
$fileversion += 100 if $fileversion < 90; # 93..95 came before 50..53
given ($fileversion) {
when (153) { } # current @FORMAT
- $FORMAT[7] = 'Ca64'; # no reserved space after description
+ $FORMAT[7] = 'C/a64'; # no reserved space after description
splice @{ $FORMAT[15] }, -2; # finish reserve
$FORMAT[-1]->[-1]->[0] = '32C'; # less objects
ref $_ and pop @$_ for @{ $FORMAT[11] }; # 9 moderefs
unshift @varform, name => 'Z*' unless $variant eq 'single' or $version <= 91;
$varform[-1]->[0] = 1 if $variant eq 'race' and $version > 91;
$varform[-1]->[0] = 2 if $variant eq 'ctf';
+ push @varform, size => '=.';
my $parselevel = Parse::Binary::Nested->new(\@varform);
while ($offset < length $data->{leveldata}) {
+ 2 * ($level->{flags} ? ref $level->{flags} eq 'ARRAY' ? scalar @{$level->{flags}} : 1 : 0)
+ ($level->{sprite} ? scalar @{$level->{sprite}} : 0)
+ ($level->{balls} ? 3 * scalar @{$level->{balls}} : 0);
- $level->{size} = $size;
+ $level->{sizecalc} = $size;
$level->{offset} = $offset + $offsetbase;
# add objects until terminator
if ($version <= 91) {
ref $_ eq 'ARRAY' and push @{ $level->{objects} }, @$_
for map { delete $level->{"objects$_"} } 2, 3;
- $size += 1 + 4 * scalar @{ $level->{objects} };
}
else {
while (my $object = ord substr($data->{leveldata}, $offset+$size, 1)) {
# add parsed level and advance
push @{ $data->{levels} }, $level;
- $offset += ++$size;
+ $offset += $level->{size};
last if ++$data->{levelcount}->{$variant} >= $amount;
}