Add Loader module

Author: heatray

files/W3D.Loader.txt

@@ -0,0 +1,12 @@
+Place modified xom or tga files here from the following paths:
+- Data
+- Data/Themes
+- Data/Effects
+- Data/Frontend/Levels
+- Data/Frontend/Wormapedia
+- Data/scripts
+- Data/Logos
+- Data/Maps
+- Data/Language/PC
+- Data/Bundles
+and they will be loaded by the game instead of original ones.

premake5.lua

@@ -64,3 +64,8 @@ project "W3D.Unlimiter"
    files { "source/unlimiter.cpp" }
 
    defines { "rsc_FileDescription=\"Unlimiter for Worms 3D\"" }
+
+project "W3D.Loader"
+   files { "source/loader.cpp" }
+
+   defines { "rsc_FileDescription=\"Unlimiter for Worms 3D\"" }

source/loader.cpp

@@ -0,0 +1,47 @@
+#include "stdafx.h"
+
+const char* DataPath = "Data2";
+
+DWORD XString__XString = 0x61A545;
+DWORD XString__RemoveInstance = 0x62A5CB;
+DWORD XString__FreeRep = 0x61A4A5;
+
+void __declspec(naked) InitOptionalPathsCodeCave()
+{
+    __asm {
+        push    DataPath
+        lea     ecx, dword ptr ss : [esp + 0x8]
+        call    XString__XString
+        mov     ecx, dword ptr ds : [esi]
+        lea     edx, dword ptr ss : [esp + 0x4]
+        push    edx
+        push    esi
+        call    dword ptr ds : [ecx + 0xC]
+        lea     ecx, dword ptr ss : [esp + 0x4]
+        call    XString__RemoveInstance
+        mov     ecx, dword ptr ss : [esp + 0x4]
+        add     ecx, 0xFFFFFFFA
+        dec     word ptr ds : [ecx]
+        cmp     word ptr ds : [ecx], 0
+        jne     InitPathsEnd
+        call    XString__FreeRep
+    InitPathsEnd:
+        pop     esi
+        pop     ecx
+        ret
+    }
+}
+
+void Init()
+{
+    injector::MakeJMP(0x44A8B9, InitOptionalPathsCodeCave, true);
+}
+
+BOOL APIENTRY DllMain(HMODULE hModule, DWORD reason, LPVOID lpReserved)
+{
+    if (reason == DLL_PROCESS_ATTACH)
+    {
+        Init();
+    }
+    return TRUE;
+}