GSoC: Michael Madsen

Game script (bytecode) decompiler

Kyra complete!

Well, I did manage to get the code generation running in just one day after all! That's means I have the entire weekend to rewrite the documentation, and there's still the final week after that for polishing everything off.

Here's a function as seen in one of the scripts (INHOME.EMC):
00000F88: global_sub0xF88() {
00000F8A:   if ((-1 < var4)) {
00000F94:     if (!(var17)) {
00000F9C:       var17 = 1;
00000FA0:       retval = auto_sub0x33C(30, 0, 28);
00000FAC:       retval = o1_queryGameFlag(2);
00000FB2:       localvar1 = retval;
00000FB6:       retval = o1_queryGameFlag(1);
00000FBC:       localvar2 = retval;
00000FC0:       var3 = 1;
00000FC4:       if ((localvar2 && localvar1)) {
00000FCE:         retval = o2_zanthiaChat("At least I found my cauldron and my spellbook.", 29);
00000FD6:         return;
00000FDA:       }
00000FDA:       if (localvar1) {
00000FE0:         retval = o2_zanthiaChat("At least I found my cauldron.", 30);
00000FE8:         return;
00000FEC:       }
00000FEC:       if (localvar2) {
00000FF2:         retval = o2_zanthiaChat("At least I found my spellbook.", 31);
00000FFA:         return;
00000FFE:       }
00000FFE:       retval = auto_sub0x33C(34, 0, 32);
0000100A:       retval = auto_sub0x33C(35, 0, 33);
00001016:       return;
0000101C:     } else {
0000101C:       var17 = 0;
00001020:       retval = o2_randomSceneChat();
00001020:     }
00001022:     var3 = 1;
00001026:     return;
0000102A:   }
0000102A:   retval = o2_useItemOnMainChar();
0000102C:   return;
0000102C: }
Currently, the decompiler only works with scripts from the talkie version of Kyra2, as one of the functions differ in the number of arguments - but I'll get that fixed before GSoC is over.

Right now, though, I'll focus on the documentation - there's a lot of stuff that needs to be written and rewritten with the changes I've made for Kyra.

Posted in Decompiler, GSoC, KYRA at 2010-08-07 02:59:52
Warning: Use of undefined constant PHP - assumed 'PHP' (this will throw an Error in a future version of PHP) in /customers/f/a/e/birdiesoft.dk/httpd.www/blog/index.php on line 90