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Gottfried's DecDat updated.

License: MIT License

Java 97.77% Kaitai Struct 2.23%

decdat's Introduction

DecDat

Originally built by Gottfried: original release post

While working on Phoenix I had to decompile compiled scripts from an older demo so it could be passed on to people doing alpha version research. To do this, I changed the source code of DecDat to work on the old .DAT file format.

When I was at it I fixed the string substitution feature and int to instance substitution.

String substitution

The decompiled code now shows the string literals instead of the const string of the string literal.

Before

description = ˙10722;

Now

description = "ENDE";

Instance substitution

Due to the way how Daedalus treats instances (they are basically symbol table indicies) the integers get decompiled back and the instance information is lost.

As a quick fix I introduced instance substitution, every integer higher than 60 is checked whether it is also an instance and then the substitution occurs. This is not a bullet proof solution, so the original integer is placed as a comment right after the substituted instance identifier.

Before

if(npc_knowsinfo(hero, 12408)) {
    return true;
};

After

if(npc_knowsinfo(hero, info_xardasdemon_intro /*12408*/)) {
    return true;
};

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decdat's Issues

Complex condition decompilation problem

This code:

if ((a == b) || (b == c)) && (c == d) {};

get decompiled to this code:

if((a == b) || (b == c) && (c == d)) {

Add decompilation to multiple files

Use the symbol position info to decompile the files into separate files.

After subsequent search the source-code tab doesn't update

How to reproduce.

Search for a symbol - it shows its source-code
Search for another symbol - nothing happens when you select the result

Add jump to string table start

Add a button to jump to the start of the string table.

Fix encoding

Set default encoding to windows-1252

All proposed encodings:

windows-1252 (German, English)
windows-1251 (Russian, Ukrainian)
windows-1250 (Czech, Polish)

Add settings for encoding.

Wrong decompilation of nested `if` in `else` blocks

This original function

func void B_SetNpcVisual (var C_NPC slf, var int gender, var string headMesh, var int faceTex, var int bodyTex, var int armorInstance)
{
	slf.aivar[AIV_Gender] = gender;

	Mdl_SetVisual (slf,"HUMANS.MDS");

	if (gender == MALE)
	{
               Mdl_SetVisualBody (slf,	"hum_body_Naked0", 	bodyTex,	0,			headMesh, 	faceTex,	0, 			armorInstance);
		
		if (slf.attribute[ATR_STRENGTH] < 50)
		{
			Mdl_SetModelScale		(slf, 0.9, 1, 1); 			//BREITE / Höhe / Tiefe
		};

		if (slf.attribute[ATR_STRENGTH] > 100)
		{
			Mdl_SetModelScale		(slf, 1.1, 1, 1);			//BREITE / Höhe / Tiefe
		};
	}
	else //gender == FEMALE
	{
		if (bodyTex >= 0) && (bodyTex <= 3) //MännerBodyTex angegeben
		{
			bodyTex = bodyTex + 4; // Females haben Variation 4-7 (Males 0-3)
		};
		Mdl_SetVisualBody (slf,	"Hum_Body_Babe0", 	bodyTex,	0,			headMesh, 	faceTex,  	0,			armorInstance);
	};
};

gets decomiled to this

func void b_setnpcvisual(var c_npc slf, var int gender, var string headmesh, var int facetex, var int bodytex, var int armorinstance) {
    slf.aivar[17] = gender;
    mdl_setvisual(slf, "HUMANS.MDS");
    if(gender == male) {
        mdl_setvisualbody(slf, "hum_body_Naked0", bodytex, 0, headmesh, facetex, 0, armorinstance);
        if(slf.attribute[4] < 50) {
            mdl_setmodelscale(slf, 0.9, 1.0, 1.0);
        };
        if(slf.attribute[4] > 100) {
            mdl_setmodelscale(slf, 1.1, 1.0, 1.0);
        };
    }
    else if((bodytex >= 0) && (bodytex <= 3)) {
            bodytex = bodytex + 4;
     };
     mdl_setvisualbody(slf, "Hum_Body_Babe0", bodytex, 0, headmesh, facetex, 0, armorinstance);
 
};

Add class filter

Add a button to show all class definitions and buttons to show instances of selected class.

Add decompilation for Va functions

Str_Format("%s = %i", STR_CONSTANT, INT_CONSTANT);
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