API: Add hooks ED_Alloc() and ED_Free() (#227)

Co-authored-by: Sergey Shorokhov <wopox1337@ya.ru>

reapi/extra/amxmodx/scripting/include/reapi_engine_const.inc

@@ -76,7 +76,20 @@ enum EngineFunc
 	* Description:  Called when client it's in the scoreboard
 	* Params:       (const this)
 	*/
-	RH_SV_EmitPings
+	RH_SV_EmitPings,
+	
+	/*
+	* Description:  Called when an entity is created.
+	* Return type:  Edict * (Entity index)
+	* Params:       ()
+	*/
+	RH_ED_Alloc,
+
+	/*
+	* Description:  Called when an entity is removed (freed from server).
+	* Params:       (const entity)
+	*/
+	RH_ED_Free,
 };
 
 /**

reapi/include/cssdk/engine/rehlds_api.h

@@ -338,4 +338,4 @@ public:
 	virtual IRehldsFlightRecorder* GetFlightRecorder() = 0;
 };
 
-#define VREHLDS_HLDS_API_VERSION "VREHLDS_HLDS_API_VERSION001"
+#define VREHLDS_HLDS_API_VERSION "VREHLDS_HLDS_API_VERSION001"

reapi/src/hook_callback.cpp

@@ -111,6 +111,26 @@ void SV_EmitPings(IRehldsHook_SV_EmitPings *chain, IGameClient *cl, sizebuf_t *m
 	SV_EmitPings_AMXX(&data, cl);
 }
 
+edict_t *ED_Alloc(IRehldsHook_ED_Alloc* chain)
+{
+	auto original = [chain]()
+	{
+		return indexOfEdict(chain->callNext());
+	};
+
+	return edictByIndexAmx(callForward<size_t>(RH_ED_Alloc, original));
+}
+
+void ED_Free(IRehldsHook_ED_Free* chain, edict_t *entity)
+{
+	auto original = [chain](int _entity)
+	{
+		chain->callNext(edictByIndexAmx(_entity));
+	};
+
+	callVoidForward(RH_ED_Free, original, indexOfEdict(entity));
+}
+
 /*
 * ReGameDLL functions
 */

reapi/src/hook_callback.h

@@ -360,6 +360,9 @@ using SV_EmitPings_t = hookdata_t<IRehldsHook_SV_EmitPings *, SV_EmitPings_args_
 void SV_EmitPings_AMXX(SV_EmitPings_t *data, IGameClient *client);
 void SV_EmitPings(IRehldsHook_SV_EmitPings *chain, IGameClient *client, sizebuf_t *msg);
 
+edict_t *ED_Alloc(IRehldsHook_ED_Alloc* chain);
+void ED_Free(IRehldsHook_ED_Free* chain, edict_t *entity);
+
 // regamedll functions
 int GetForceCamera(IReGameHook_GetForceCamera *chain, CBasePlayer *pObserver);
 void PlayerBlind(IReGameHook_PlayerBlind *chain, CBasePlayer *pPlayer, entvars_t *pevInflictor, entvars_t *pevAttacker, float fadeTime, float fadeHold, int alpha, Vector& color);

reapi/src/hook_list.cpp

@@ -90,7 +90,9 @@ hook_t hooklist_engine[] = {
 	ENG(GetEntityInit),
 	ENG(ClientConnected),
 	ENG(SV_ConnectClient),
-	ENG(SV_EmitPings, _AMXX)
+	ENG(SV_EmitPings, _AMXX),
+	ENG(ED_Alloc),
+	ENG(ED_Free),
 };
 
 #define DLL(h,...) { {}, {}, #h, "ReGameDLL", [](){ return api_cfg.hasReGameDLL(); }, ((!(RG_##h & (MAX_REGION_RANGE - 1)) ? regfunc::current_cell = 1, true : false) || (RG_##h & (MAX_REGION_RANGE - 1)) == regfunc::current_cell++) ? regfunc(h##__VA_ARGS__) : regfunc(#h#__VA_ARGS__), [](){ g_ReGameHookchains->h()->registerHook(&h); }, [](){ g_ReGameHookchains->h()->unregisterHook(&h); }, false}

reapi/src/hook_list.h

@@ -101,7 +101,9 @@ enum EngineFunc
 	RH_GetEntityInit,
 	RH_ClientConnected,
 	RH_SV_ConnectClient,
-	RH_SV_EmitPings
+	RH_SV_EmitPings,
+	RH_ED_Alloc,
+	RH_ED_Free,
 
 	// [...]
 };