--- /dev/null
+package Games::Wormy::TICalcLevels;
+
+use 5.010;
+use strict;
+use warnings;
+
+use List::Util qw(sum min max);
+use Data::Dumper;
+use Parse::Binary::Nested qw(unpackf);
+
+our $VERSION = '1.00';
+
+sub read {
+ my ($self, $input, $override) = @_;
+ my ($psize, $ptype, $size, $type, $vsize, $dsize, $id, $version) = unpack q{
+ x11 x42 # file signature and comment
+ S a2 S a2 # file size, type; data size, type
+ x8 # var name
+ S S # var size; content size
+ CC # wormy header
+ }, $input;
+ $ptype eq "\014\000"
+ or die "Not a calculator string, thus cannot be a Wormy level file\n";
+ $size == $psize - 16
+ or warn "File size ($size) does not correspond with data size ($psize)\n";
+ $type eq "\014\010"
+ or die "Not a calculator string, thus cannot be a Wormy level file\n";
+ $size == $vsize and $vsize == $dsize+2
+ or warn "Mismatch in string data size declarations\n";
+# substr($input, -2) eq $CHECKSUM
+
+ $input = substr $input, 73, -2;
+ $id eq ord 'w'
+ or die "Wormy level identifier not found\n";
+
+ if ($override) {
+ warn "Override version $version to $override\n";
+ $version = $override;
+ }
+ elsif ($version == 95) {
+ # level offset instead of description byte
+ $version-- if (unpack('x2Z*x2xC', $input))[1] == 0xF4;
+ warn "Ambiguous file version 95; guessing subversion $version\n";
+ }
+
+ my @FORMAT = (
+ magic => 'a1',
+ version => 'C',
+ name => 'Z*',
+ description => 'Z*',
+ levelcount => [1,
+ total => 'S',
+ ],
+ moderef => [1,
+ map { (
+ offset => [1, map {$_ => 'S'} @$_], # byte location of start
+ end => [1, map {$_ => 'C'} @$_],
+ ) }
+ [qw/single peaworm tron deathmatch foodmatch multifood timematch race ctf/]
+ ],
+ theanswer => 'x', # 42
+ sprite => ['C',
+ line => 'B8',
+ ],
+ leveldata => 'a*',
+ #levels
+ #finish code
+ #levels-multi
+ #hinames
+ );
+ my @LEVELFORM = (
+ peas => 'C',
+ delay => 'C',
+ growth => 'C',
+ bsize => 'C',
+ sprite => ['C',
+ line => 'B8',
+ ],
+ balls => ['C',
+ y => 'C',
+ x => 'C',
+ dir => 'C',
+ ],
+ worms => [1,
+ d => 'C',
+ y => 'C',
+ x => 'C',
+ ],
+ width => 'C',
+ height => 'C',
+ flags => [0,
+ y => 'C',
+ x => 'C',
+ ],
+ objects => ['?0',
+ type => 'C',
+ x1 => 'C',
+ y1 => 'C',
+ x2 => 'C',
+ y2 => 'C',
+ ],
+ );
+ my $offsetbase = 0xF080;
+
+ my @VARMODES = (
+ [qw'single single'],
+ [qw'multi peaworm tron deathmatch foodmatch multifood timematch'],
+ [qw'race race'],
+ [qw'ctf ctf'],
+ );
+
+ given ($version) {
+ when (97) {
+ # current @FORMAT
+ }
+ $offsetbase = 0xF400;
+ when (96) {}
+ ref $_ and splice(@$_, -8, 2) for @{ $FORMAT[11] }; # no multifood
+ splice @FORMAT, 12, 2; # no reserved byte
+ when (95) {}
+ splice @FORMAT, 6, 2; # no description
+ when (94) {}
+ when (90) {
+ $FORMAT[5] = 'C/a'; # length-preceding name
+ splice @FORMAT, 10, 2; # no default sprite
+ ref $_ and do {
+ $_->[5] = $_->[7]; # no tron; deathmatch instead
+ $_->[7] = $_->[9]; # foodmatch instead
+ $_->[9] = 'linkmatch'; # replaces timematch
+ $_->[11] = $_->[13]; # race
+ $_->[13] = $_->[15]; # ctf
+ $_->[15] = 'domination';
+ } for @{ $FORMAT[9] }; # no multifood
+ splice @LEVELFORM, -2;
+ push @LEVELFORM, "objects$_" => ['C',
+ type => "=$_",
+ map {$_ => 'C'} qw(x1 y1 x2 y2)
+ ] for 2, 3;
+ # peaworm/tron mode do not take multiplayer levels
+ splice @VARMODES, 1, 0, ['peaworm', splice @{ $VARMODES[1] }, 1, 2];
+ }
+ default {
+ die "Unsupported level version $version\n";
+ }
+ }
+
+ my $data = unpackf(\@FORMAT, $input);
+ my $offset = 0;
+ $offsetbase += 1 + @{ $data->{sprite} } if $data->{sprite};
+ $data->{moderef}->{offset}->{single} == $offsetbase
+ or warn "First singleplayer level is not in front\n";
+
+ my $slots = sum(grep {defined}
+ $data->{moderef}->{end}->{single} > 0, # singleplayer slot if any levels
+ $data->{moderef}->{end}->{peaworm}, # one for each peaworm arena
+ $data->{moderef}->{end}->{tron}, # idem for tron
+ );
+ $data->{hinames} = [ unpack '(x2a3)*', substr($data->{leveldata}, -5 * $slots) ];
+ $data->{format} = '86s';
+
+ $data->{levels} = [];
+ for my $modes (@VARMODES) {
+ my $variant = shift @$modes;
+ my @modeoffsets = grep {defined} #TODO: comment
+ map { $data->{moderef}->{offset}->{$_} } @$modes;
+ @modeoffsets or next;
+ $data->{levelcount}->{$variant} = 0;
+ $offset = min(grep {$_} @modeoffsets) or next;
+ $offset -= $offsetbase;
+ my $amount = $variant eq 'single' ? 100
+ : max(grep {defined} map { $data->{moderef}->{end}->{$_} } @$modes);
+
+ my @varform = @LEVELFORM;
+ $varform[13]->[0] = $variant ~~ ['single', 'peaworm'] ? 1 : 4; # worms
+ unshift @varform, name => 'Z*' unless $variant eq 'single' or $version <= 91;
+ $varform[-3]->[0] = 1 if $variant eq 'race' and $version > 91;
+ $varform[-3]->[0] = 2 if $variant eq 'ctf';
+ push @varform, size => '=.';
+ my $parselevel = Parse::Binary::Nested->new(\@varform);
+
+ while ($offset < length $data->{leveldata}) {
+ last if substr($data->{leveldata}, $offset, 1) eq chr(255);
+
+ # find references to this level offset, and set start number to matching modes
+ while (my ($mode, $location) = each %{ $data->{moderef}->{offset} }) {
+ $location == $offset + $offsetbase or next;
+ $data->{moderef}->{start}->{$mode} = 1 + scalar @{ $data->{levels} };
+ }
+
+ my $level = $parselevel->unpackf(substr $data->{leveldata}, $offset);
+ $level->{offset} = $offset + $offsetbase;
+
+ # add objects until terminator
+ $level->{objects} = [];
+ if ($version <= 91) {
+ ref $_ eq 'ARRAY' and push @{ $level->{objects} }, @$_
+ for map { delete $level->{"objects$_"} } 2, 3;
+ }
+
+ # add parsed level and advance
+ push @{ $data->{levels} }, $level;
+ $offset += $level->{size};
+ last if ++$data->{levelcount}->{$variant} >= $amount;
+ }
+
+ if ($variant eq 'single') {
+ $offset++;
+ $data->{finish}->{code} =
+ my $code = substr $data->{leveldata}, $offset, -5*$slots;
+
+ my %FINISHCODE = (
+ 0 => chr 0xC9, # ret
+ 1 => join('',
+ chr 0x21, # ld hl, MESSAGE
+ pack('v', $offsetbase + $offset + 9),
+ (map {chr}
+ 0xCD, 0x37, 0x4A, # call _puts
+ 0xC3, 0xAA, 0x55, # jp _getkey
+ ),
+ ),
+ 2 => join('',
+ (map {chr}
+ 0x21, 0, 0x1C, # ld hl, $POS
+ 0x22, 0x7C, 0xC3, # ld (_penCol), hl
+ 0x21, # ld hl, MESSAGE
+ ),
+ pack('v', $offsetbase + $offset + 15),
+ (map {chr}
+ 0xCD, 0xA5, 0x4A, # call _vputs
+ 0xC3, 0xAA, 0x55, # jp _getkey
+ ),
+ ),
+ );
+ while (my ($finish, $match) = each %FINISHCODE) {
+ $match eq substr $code, 0, length $match or next;
+ $data->{finish}->{type} = $finish and
+ $data->{finish}->{message} = unpack 'Z*', substr($code, length $match);
+ last;
+ }
+ }
+ }
+
+ return $data;
+}
+
+1;
+
+__END__
+
+=head1 NAME
+
+Games::Wormy::TICalcLevels - Read Wormy levelset from a compiled TI-86 file
+
+=head1 SYNOPSIS
+
+ my $levelset = Games::Wormy::TICalcLevels->read($filecontents);
+ print $levelset->{name};
+
+=head1 AUTHOR
+
+Mischa POSLAWSKY <perl@shiar.org>
+
+=head1 LICENSE
+
+LGPL version 3.
+
git.shiar.nl / wormy.git / blobdiff