#!/usr/bin/perl

use strict;

my %raine_loads =
    ( "ROM_LOAD16_BYTE" => "LOAD_8_16",
      "ROM_LOAD" => "LOAD_NORMAL",
      "ROM_LOAD16_WORD" => "LOAD_NORMAL",
      "ROM_LOAD16_WORD_SWAP" => "LOAD_SWAP_16",
      "ROM_LOAD32_WORD_SWAP" => "LOAD32_SWAP_16",
      "ROM_LOAD32_BYTE" => "LOAD_8_32",
      );

my %raine_regions =
    (
     "REGION_CPU1" => "REGION_ROM1",
     "REGION_CPU2" => "REGION_ROM2",
     "REGION_SOUND1" => "REGION_SMP1",
     "REGION_SOUND2" => "REGION_SMP2",
     );

my $started = undef;
my $warncont = undef;
my (@odd,@even);

open(F,"<$ARGV[0]") || die "Impossible to open $ARGV[0]";
while (<F>) {
  if (/ROM_START ?\( ?(.+?) ?\)/) {
    my $name = $1;
    $name = "_".$name if ($name =~ /^\d/);
    print "static struct ROM_INFO $name\_roms\[\] =\n{\n";
    my $comment = undef;
    my $load_be = undef;
    while (<F>) {
      if (/ROM_REGION\( ?(.+?) ?\)/ || /ROM_REGION16_BE\( ?(.+?) ?\)/) {
	my $nbx = 0;
	my $args = $1;
#	$load_be = 1 if (/ROM_REGION16_BE/);
	@odd = ();
	@even = ();
	if ((my ($size,$region_name,$thing) = split(/\, */,$args))) {
	  $size =~ s/^ *//;
	  $region_name = $raine_regions{$region_name} if ($raine_regions{$region_name});
	  my ($function,$oldname,$oldsize,$oldbase,$oldcrc,$oldfunc) = undef;
	  while (<F>) {
	    if (/^[ \t]*\/\*.+\*\/[ \t]*$/) {
	      print;
	      next;
	    }
#	    s/\/\*.+\*\///; # filter out comments (or try to)
	    if ($comment) {
	      print;
	      if (/\*\//) {
		$comment = undef;
	      }
	      next;
	    }
	    if (!/ROM_REGION/ && /([\w\d_]+) *\( *(.+) *\)/) {
	      $function = $1;
	      my $args = $2;
	      my ($name,$base,$size,$crc,$attrib) = split(/\, */,$args);
	      if ($crc =~ /CRC\((.+?)\)/) {
		$crc = "0x$1";
	      }
	      $size =~ s/^ *//;
	      if ($raine_loads{$function}) {
		$function = ($load_be ? "LOAD_BE" : $raine_loads{$function});
	      } elsif ($function eq "ROM_RELOAD") {
		$size = $base;
		$size =~ s/ +//;
		$base = $name;
		$name = $oldname;
		$crc = $oldcrc;
		$attrib = $oldfunc;
		$function = "LOAD_NORMAL";
	      } elsif ($function eq "ROMX_LOAD") {
		my @arg = split(/ *\| */,$attrib);
		if ($arg[0] eq "ROM_GROUPBYTE") {
		  shift @arg; # just skip this one !
		}
		if ($arg[0] eq "ROM_GROUPWORD" && $arg[1] eq "ROM_SKIP(6) ") {
		  $function = "LOAD_16_64";
		} elsif ($arg[0] eq "ROM_SKIP(7) ") {
		  $function = "LOAD_8_64";
		} else {
		  print STDERR "ROMX_LOAD: unknown attribute ",join(",",@arg),".\n";
		  exit(1);
		}
	      } elsif ($function =~ /ROM_(COPY|FILL)/) {
		chomp;
		print STDERR "Ignored : $function\n";
		print "/* Ignored : $_ */\n";
		$function = $oldfunc;
		next;
	      } elsif (!($function eq "ROM_CONTINUE")) {
		print STDERR "Unknown loading $function from line $_\n";
		exit(1);
	      }
	      if ($function eq "ROM_CONTINUE") {
		if (!$warncont) {
		  print STDERR "ROM_CONTINUE found. Forcing loading at 0, whole size...\n";
		  $warncont = 1;
		}
		if ($oldsize =~ /^0x/) {
		  $oldsize = hex($oldsize);
		} elsif (length($oldsize)) {
		  print STDERR "size :$oldsize: ($oldfunc,$oldbase,$oldname) ???\n";
		  exit(1);
		}
		$base = hex($base) if ($base =~ /^0x/); # base is size...
		$oldsize += $base;
		$oldsize = "0x".sprintf("%x",$oldsize);
		$oldbase = 0;
		$function = "LOAD_NORMAL";
	      } else {
		if ($oldname) {
		  print "  { $oldname, $oldsize, $oldcrc, $region_name, $oldbase, $oldfunc },\n";
		}
		($oldname,$oldsize,$oldbase,$oldcrc,$oldfunc) =
		    ($name,$size,$base,$crc,$function);
	      }
	    } elsif (/ROM_REGION/ || # empty line
		     /ROM_END/) {
	      if ($oldname) {
		print "  { $oldname, $oldsize, $oldcrc, $region_name, $oldbase, $function },\n";
	      }
	      last;
	    } elsif (/^[ \t]*\/\*/ && !/\*\//) {
	      print;
	      $comment = 1;
	      next;
	    } elsif (!/^[ \t]*$/) { # not an empty line, and unknown
	      print STDERR "weird line $_\n";
	      print;
	    }
	  } # while (<>)
	  if (/ROM_END/) {
	    print "  { NULL, 0, 0, 0, 0, 0 }\n";
	    print "};\n\n";
	    last;
	  }
	} else {
	  print STDERR "Failure to parse REGION args $args\n";
	  exit(1);
	}
      } # if (/ROM_REGION
      redo if (/ROM_REGION/); # yet another line...
    } # while (<F>)
  }
}
close(F);

