Fix ignorefirestate behaviour

Client/multiplayer_sa/CMultiplayerSA.cpp

@@ -1596,6 +1596,7 @@ void CMultiplayerSA::InitHooks()
 
     InitHooks_Postprocess();
     InitHooks_Explosions();
+    InitHooks_Tasks();
 }
 
 // Used to store copied pointers for explosions in the FxSystem

Client/multiplayer_sa/CMultiplayerSA.h

@@ -82,6 +82,7 @@ class CMultiplayerSA : public CMultiplayer
     void                InitHooks_Postprocess();
     void                InitHooks_DeviceSelection();
     void                InitHooks_Explosions();
+    void                InitHooks_Tasks();
     CRemoteDataStorage* CreateRemoteDataStorage();
     void                DestroyRemoteDataStorage(CRemoteDataStorage* pData);
     void                AddRemoteDataStorage(CPlayerPed* pPed, CRemoteDataStorage* pData);

Client/multiplayer_sa/CMultiplayerSA_Tasks.cpp

@@ -0,0 +1,71 @@
+/*****************************************************************************
+ *
+ *  PROJECT:     Multi Theft Auto
+ *  LICENSE:     See LICENSE in the top level directory
+ *  FILE:        multiplayer_sa/CMultiplayerSA_Tasks.cpp
+ *
+ *  Multi Theft Auto is available from https://www.multitheftauto.com/
+ *
+ *****************************************************************************/
+#include "StdInc.h"
+
+//////////////////////////////////////////////////////////////////////////////////////////
+//
+// CTaskSimplePlayerOnFoot::MakeAbortable
+//
+// If ignorefirestate is enabled, we need this hook to avoid tweaking the aiming animation
+// and the chainsaw turning off when entering fire
+//
+//////////////////////////////////////////////////////////////////////////////////////////
+static bool __IsIgnoreFireStateEnabled()
+{
+    return pGameInterface->IsIgnoreFireStateEnabled();
+}
+
+#define HOOKPOS_CTaskSimplePlayerOnFoot__MakeAbortable  0x68584D
+#define HOOKSIZE_CTaskSimplePlayerOnFoot__MakeAbortable 6
+static constexpr std::uintptr_t RETURN_CTaskSimplePlayerOnFoot__MakeAbortable = 0x68585F;
+static constexpr std::uintptr_t SKIP_CTaskSimplePlayerOnFoot__MakeAbortable = 0x685855;
+static void _declspec(naked) HOOK_CTaskSimplePlayerOnFoot__MakeAbortable()
+{
+    _asm
+    {
+        // return false and keep task alive
+        call dword ptr [eax+8]
+        cmp eax, 3Dh
+        jl skip
+
+        // if eventPriority == 66 (EventOnFire) && IsIgnoreFireStateEnabled()
+        cmp eax, 42h
+        jne continue_logic
+
+        call __IsIgnoreFireStateEnabled
+        test al, al
+        jz continue_logic
+
+        // return true but keep task alive
+        pop edi
+        pop esi
+        pop ebx
+        mov al, 1
+        retn 0Ch
+
+        continue_logic:
+        jmp RETURN_CTaskSimplePlayerOnFoot__MakeAbortable
+
+        skip:
+        jmp SKIP_CTaskSimplePlayerOnFoot__MakeAbortable
+    }
+}
+
+//////////////////////////////////////////////////////////////////////////////////////////
+//
+// CMultiplayerSA::InitHooks_Tasks
+//
+// Setup hooks
+//
+//////////////////////////////////////////////////////////////////////////////////////////
+void CMultiplayerSA::InitHooks_Tasks()
+{
+    EZHookInstall(CTaskSimplePlayerOnFoot__MakeAbortable);
+}