Add templated helper class to promote type-safety (#965)

extensions/cstrike/natives.cpp

@@ -34,6 +34,7 @@
 #include "forwards.h"
 #include "util_cstrike.h"
 #include <server_class.h>
+#include <sm_argbuffer.h>
 
 #if SOURCE_ENGINE == SE_CSGO
 #include "itemdef-hash.h"
@@ -178,12 +179,8 @@ static cell_t CS_SwitchTeam(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Client index %d is not valid", params[1]);
 	}
 
-	unsigned char vstk[sizeof(CBaseEntity *) + sizeof(int)];
+	ArgBuffer<CBaseEntity*, int> vstk(pEntity, params[2]);
-	unsigned char *vptr = vstk;
 
-	*(CBaseEntity **)vptr = pEntity;
-	vptr += sizeof(CBaseEntity *);
-	*(int *)vptr = params[2];
 	pWrapper->Execute(vstk, NULL);
 #else
 	if (g_pSDKTools == NULL)
@@ -273,20 +270,10 @@ static cell_t CS_DropWeapon(IPluginContext *pContext, const cell_t *params)
 	if (params[4] == 1 && g_pCSWeaponDropDetoured)
 		g_pIgnoreCSWeaponDropDetour = true;
 
-	unsigned char vstk[sizeof(CBaseEntity *) * 2 + sizeof(bool) * 2];
-	unsigned char *vptr = vstk;
-
 	// <psychonic> first one is always false. second is true to toss, false to just drop
-	*(CBaseEntity **)vptr = pEntity;
+	ArgBuffer<CBaseEntity*, CBaseEntity*, bool, bool> vstk(pEntity, pWeapon, false, (params[3]) ? true : false);
-	vptr += sizeof(CBaseEntity *);
-	*(CBaseEntity **)vptr = pWeapon;
-	vptr += sizeof(CBaseEntity *);
-	*(bool *)vptr = false;
-	vptr += sizeof(bool);
-	*(bool *)vptr = (params[3]) ? true : false;
 
 	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -333,14 +320,7 @@ static cell_t CS_TerminateRound(IPluginContext *pContext, const cell_t *params)
 	if (params[3] == 1 && g_pTerminateRoundDetoured)
 		g_pIgnoreTerminateDetour = true;
 
-	unsigned char vstk[sizeof(void *) + sizeof(float)+ sizeof(int)];
+	ArgBuffer<void*, float, int> vstk(gamerules, sp_ctof(params[1]), reason);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = gamerules;
-	vptr += sizeof(void *);
-	*(float *)vptr = sp_ctof(params[1]);
-	vptr += sizeof(float);
-	*(int*)vptr = reason;
 
 	pWrapper->Execute(vstk, NULL);
 #elif SOURCE_ENGINE == SE_CSGO && !defined(WIN32)
@@ -368,18 +348,7 @@ static cell_t CS_TerminateRound(IPluginContext *pContext, const cell_t *params)
 	if (params[3] == 1 && g_pTerminateRoundDetoured)
 		g_pIgnoreTerminateDetour = true;
 
-	unsigned char vstk[sizeof(void *) + sizeof(float) + (sizeof(int)*3)];
+	ArgBuffer<void*, float, int, int, int> vstk(gamerules, sp_ctof(params[1]), reason, 0, 0);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = gamerules;
-	vptr += sizeof(void *);
-	*(float *)vptr = sp_ctof(params[1]);
-	vptr += sizeof(float);
-	*(int*)vptr = reason;
-	vptr += sizeof(int);
-	*(int*)vptr = 0;
-	vptr += sizeof(int);
-	*(int*)vptr = 0;
 
 	pWrapper->Execute(vstk, NULL);
 #else // CSGO Win32
@@ -881,15 +850,9 @@ static cell_t CS_SetClientClanTag(IPluginContext *pContext, const cell_t *params
 	char *szNewTag;
 	pContext->LocalToString(params[2], &szNewTag);
 
-	unsigned char vstk[sizeof(CBaseEntity *) + sizeof(char *)];
+	ArgBuffer<CBaseEntity*, char*> vstk(pEntity, szNewTag);
-	unsigned char *vptr = vstk;
-
-	*(CBaseEntity **)vptr = pEntity;
-	vptr += sizeof(CBaseEntity *);
-	*(char **)vptr = szNewTag;
 
 	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 #endif
 }

extensions/cstrike/util_cstrike.cpp

@@ -35,6 +35,7 @@
 #include <iplayerinfo.h>
 #if SOURCE_ENGINE == SE_CSGO
 #include "itemdef-hash.h"
+#include <sm_argbuffer.h>
 
 ClassnameMap g_mapClassToDefIdx;
 ItemIndexMap g_mapDefIdxToClass;
@@ -134,16 +135,9 @@ CEconItemView *GetEconItemView(CBaseEntity *pEntity, int iSlot)
 	if (team != 2 && team != 3)
 		return NULL;
 
-	CEconItemView *ret;
+	ArgBuffer<void*, int> vstk(reinterpret_cast<void*>(((intptr_t)pEntity + thisPtrOffset)), iSlot);
-	unsigned char vstk[sizeof(void *) + sizeof(int) * 2];
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = (void *)((intptr_t)pEntity + thisPtrOffset);
-	vptr += sizeof(void *);
-	*(int *)vptr = team;
-	vptr += sizeof(int);
-	*(int *)vptr = iSlot;
 
+	CEconItemView *ret = nullptr;
 	pWrapper->Execute(vstk, &ret);
 
 	return ret;
@@ -163,13 +157,9 @@ CCSWeaponData *GetCCSWeaponData(CEconItemView *view)
 			pWrapper = g_pBinTools->CreateCall(addr, CallConv_ThisCall, &retpass, NULL, 0))
 	}
 
-	unsigned char vstk[sizeof(CEconItemView *)];
+	ArgBuffer<CEconItemView*> vstk(view);
-	unsigned char *vptr = vstk;
-
-	*(CEconItemView **)vptr = view;
-
-	CCSWeaponData *pWpnData = NULL;
 
+	CCSWeaponData *pWpnData = nullptr;
 	pWrapper->Execute(vstk, &pWpnData);
 
 	return pWpnData;
@@ -234,14 +224,9 @@ CEconItemDefinition *GetItemDefintionByName(const char *classname)
 		g_RegNatives.Register(pWrapper);
 	}
 
-	unsigned char vstk[sizeof(void *) + sizeof(const char *)];
+	ArgBuffer<void*, const char *> vstk(pSchema, classname);
-	unsigned char *vptr = vstk;
 
-	*(void **)vptr = pSchema;
+	CEconItemDefinition *pItemDef = nullptr;
-	vptr += sizeof(void *);
-	*(const char **)vptr = classname;
-
-	CEconItemDefinition *pItemDef = NULL;
 	pWrapper->Execute(vstk, &pItemDef);
 
 	return pItemDef;
@@ -390,8 +375,6 @@ ItemDefHashValue *GetHashValueFromWeapon(const char *szWeapon)
 #if SOURCE_ENGINE != SE_CSGO
 void *GetWeaponInfo(int weaponID)
 {
-	void *info;
-
 	static ICallWrapper *pWrapper = NULL;
 	if (!pWrapper)
 	{
@@ -407,11 +390,9 @@ void *GetWeaponInfo(int weaponID)
 			pWrapper = g_pBinTools->CreateCall(addr, CallConv_Cdecl, &retpass, pass, 1))
 	}
 
-	unsigned char vstk[sizeof(int)];
+	ArgBuffer<int> vstk(weaponID);
-	unsigned char *vptr = vstk;
-
-	*(int *)vptr = weaponID;
 
+	void *info = nullptr;
 	pWrapper->Execute(vstk, &info);
 
 	return info;
@@ -435,7 +416,6 @@ const char *GetWeaponNameFromClassname(const char *weapon)
 const char *GetTranslatedWeaponAlias(const char *weapon)
 {
 #if SOURCE_ENGINE != SE_CSGO
-	const char *alias = NULL;
 
 	static ICallWrapper *pWrapper = NULL;
 
@@ -453,12 +433,11 @@ const char *GetTranslatedWeaponAlias(const char *weapon)
 			pWrapper = g_pBinTools->CreateCall(addr, CallConv_Cdecl, &retpass, pass, 1))
 	}
 
-	unsigned char vstk[sizeof(const char *)];
+	ArgBuffer<const char *> vstk(GetWeaponNameFromClassname(weapon));
-	unsigned char *vptr = vstk;
-
-	*(const char **)vptr = GetWeaponNameFromClassname(weapon);
 
+	const char *alias = nullptr;
 	pWrapper->Execute(vstk, &alias);
+
 	return alias;
 #else //this should work for both games maybe replace both?
 	static const char *szAliases[] =
@@ -492,8 +471,6 @@ const char *GetTranslatedWeaponAlias(const char *weapon)
 int AliasToWeaponID(const char *weapon)
 {
 #if SOURCE_ENGINE != SE_CSGO
-	int weaponID = 0;
-
 	static ICallWrapper *pWrapper = NULL;
 
 	if (!pWrapper)
@@ -510,11 +487,9 @@ int AliasToWeaponID(const char *weapon)
 			pWrapper = g_pBinTools->CreateCall(addr, CallConv_Cdecl, &retpass, pass, 1))
 	}
 
-	unsigned char vstk[sizeof(const char *)];
+	ArgBuffer<const char *> vstk(GetWeaponNameFromClassname(weapon));
-	unsigned char *vptr = vstk;
-
-	*(const char **)vptr = GetWeaponNameFromClassname(weapon);
 
+	int weaponID = 0;
 	pWrapper->Execute(vstk, &weaponID);
 
 	return weaponID;
@@ -531,10 +506,8 @@ int AliasToWeaponID(const char *weapon)
 const char *WeaponIDToAlias(int weaponID)
 {
 #if SOURCE_ENGINE != SE_CSGO
-	const char *alias = NULL;
 
 	static ICallWrapper *pWrapper = NULL;
-
 	if (!pWrapper)
 	{
 		REGISTER_ADDR("WeaponIDToAlias", 0,
@@ -549,11 +522,9 @@ const char *WeaponIDToAlias(int weaponID)
 			pWrapper = g_pBinTools->CreateCall(addr, CallConv_Cdecl, &retpass, pass, 1))
 	}
 
-	unsigned char vstk[sizeof(int)];
+	ArgBuffer<int> vstk(weaponID);
-	unsigned char *vptr = vstk;
-
-	*(int *)vptr = weaponID;
 
+	const char *alias = nullptr;
 	pWrapper->Execute(vstk, &alias);
 
 	return alias;

extensions/sdktools/inputnatives.cpp

@@ -32,6 +32,7 @@
 #include "extension.h"
 #include "variant-t.h"
 #include <datamap.h>
+#include <sm_argbuffer.h>
 
 ICallWrapper *g_pAcceptInput = NULL;
 
@@ -79,9 +80,6 @@ static cell_t AcceptEntityInput(IPluginContext *pContext, const cell_t *params)
 	CBaseEntity *pActivator, *pCaller, *pDest;
 
 	char *inputname;
-	unsigned char vstk[sizeof(void *) + sizeof(const char *) + sizeof(CBaseEntity *)*2 + SIZEOF_VARIANT_T + sizeof(int)];
-	unsigned char *vptr = vstk;
-
 	ENTINDEX_TO_CBASEENTITY(params[1], pDest);
 	pContext->LocalToString(params[2], &inputname);
 	if (params[3] == -1)
@@ -97,19 +95,9 @@ static cell_t AcceptEntityInput(IPluginContext *pContext, const cell_t *params)
 		ENTINDEX_TO_CBASEENTITY(params[4], pCaller);
 	}
 
-	*(void **)vptr = pDest;
+	ArgBuffer<void*, const char*, CBaseEntity*, CBaseEntity*, decltype(g_Variant_t), int> vstk(pDest, inputname, pActivator, pCaller, g_Variant_t, params[5]);
-	vptr += sizeof(void *);
-	*(const char **)vptr = inputname;
-	vptr += sizeof(const char *);
-	*(CBaseEntity **)vptr = pActivator;
-	vptr += sizeof(CBaseEntity *);
-	*(CBaseEntity **)vptr = pCaller;
-	vptr += sizeof(CBaseEntity *);
-	memcpy(vptr, g_Variant_t, SIZEOF_VARIANT_T);
-	vptr += SIZEOF_VARIANT_T;
-	*(int *)vptr = params[5];
 
-	bool ret;
+	bool ret = false;
 	g_pAcceptInput->Execute(vstk, &ret);
 
 	_init_variant_t();

extensions/sdktools/outputnatives.cpp

@@ -32,6 +32,7 @@
 #include "extension.h"
 #include "variant-t.h"
 #include "output.h"
+#include <sm_argbuffer.h>
 
 ICallWrapper *g_pFireOutput = NULL;
 
@@ -365,9 +366,6 @@ static cell_t FireEntityOutput(IPluginContext *pContext, const cell_t *params)
 	void *pOutput = NULL;
 	
 	char *outputname;
-	unsigned char vstk[sizeof(void *) + sizeof(CBaseEntity *)*2 + SIZEOF_VARIANT_T + sizeof(float)];
-	unsigned char *vptr = vstk;
-
 	ENTINDEX_TO_CBASEENTITY(params[1], pCaller);
 	pContext->LocalToString(params[2], &outputname);
 	
@@ -382,17 +380,9 @@ static cell_t FireEntityOutput(IPluginContext *pContext, const cell_t *params)
 			ENTINDEX_TO_CBASEENTITY(params[3], pActivator);
 		}
 
-		*(void **)vptr = pOutput;
+		ArgBuffer<void*, decltype(g_Variant_t), CBaseEntity*, CBaseEntity*, float> vstk(pOutput, g_Variant_t, pActivator, pCaller, sp_ctof(params[4]));
-		vptr += sizeof(void *);
-		memcpy(vptr, g_Variant_t, SIZEOF_VARIANT_T);
-		vptr += SIZEOF_VARIANT_T;
-		*(CBaseEntity **)vptr = pActivator;
-		vptr += sizeof(CBaseEntity *);
-		*(CBaseEntity **)vptr = pCaller;
-		vptr += sizeof(CBaseEntity *);
-		*(float *)vptr = sp_ctof(params[4]);
 
-		g_pFireOutput->Execute(vstk, NULL);
+		g_pFireOutput->Execute(vstk, nullptr);
 
 		_init_variant_t();
 		return 1;

extensions/tf2/natives.cpp

@@ -35,6 +35,7 @@
 #include "RegNatives.h"
 
 #include <ISDKTools.h>
+#include <sm_argbuffer.h>
 
 // native TF2_MakeBleed(client, attacker, Float:duration)
 cell_t TF2_MakeBleed(IPluginContext *pContext, const cell_t *params)
@@ -80,26 +81,14 @@ cell_t TF2_MakeBleed(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*, CBaseEntity*, CBaseEntity*, 
+											float,
+											int, // Damage amount
+											bool, // Permanent
+											int>  // Custom Damage type (bleeding)
+											vstk(obj, pAttacker, NULL, sp_ctof(params[3]), 4, false, 32);
 
-	unsigned char vstk[sizeof(void *) + 2*sizeof(CBaseEntity *) + sizeof(float) + sizeof(int) + sizeof(bool) + sizeof(int)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(CBaseEntity **)vptr = pAttacker;
-	vptr += sizeof(CBaseEntity *);
-	*(CBaseEntity **)vptr = NULL;
-	vptr += sizeof(CBaseEntity *);
-	*(float *)vptr = sp_ctof(params[3]);
-	vptr += sizeof(float);
-	*(int *)vptr = 4;      // Damage amount
-	vptr += sizeof(int);
-	*(bool *)vptr = false; // Permanent
-	vptr += sizeof(bool);
-	*(int *)vptr = 34;     // Custom Damage type (bleeding)
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -138,20 +127,11 @@ cell_t TF2_Burn(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*, CBaseEntity*, CBaseEntity*, 
+										float> //duration
+										vstk(obj, pTarget, nullptr, 10.0f);
 
-	unsigned char vstk[sizeof(void *) + 2*sizeof(CBaseEntity *) + sizeof(float)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(CBaseEntity **)vptr = pTarget;
-	vptr += sizeof(CBaseEntity *);
-	*(CBaseEntity **)vptr = NULL;
-	vptr += sizeof(CBaseEntity *);
-	*(float *)vptr = 10.0f; // duration
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -200,22 +180,9 @@ cell_t TF2_Disguise(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Target client index %d is not valid", params[4]);
 	}
 
-	unsigned char vstk[sizeof(void *) + 2*sizeof(int) + sizeof(CBaseEntity *) + sizeof(bool)];
+	ArgBuffer<void*, int, int, CBaseEntity*, bool> vstk(obj, params[2], params[3], pTarget, true);
-	unsigned char *vptr = vstk;
-
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(int *)vptr = params[2];
-	vptr += sizeof(int);
-	*(int *)vptr = params[3];
-	vptr += sizeof(int);
-	*(CBaseEntity **)vptr = pTarget;
-	vptr += sizeof(CBaseEntity *);
-	*(bool *)vptr = true;
-	
-	pWrapper->Execute(vstk, NULL);
 
+	pWrapper->Execute(vstk, nullptr);
 	return 1;
 }
 
@@ -237,15 +204,9 @@ cell_t TF2_RemoveDisguise(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*> vstk(obj);
 
-	unsigned char vstk[sizeof(void *)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-
-	*(void **)vptr = obj;
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -284,20 +245,9 @@ cell_t TF2_AddCondition(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*, int, float, CBaseEntity*> vstk(obj, params[2], params[3], pInflictor);
 
-	unsigned char vstk[sizeof(void *) + sizeof(int) + sizeof(float) + sizeof(CBaseEntity *)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(int *)vptr = params[2];
-	vptr += sizeof(int);
-	*(float *)vptr = *(float *)&params[3];
-	vptr += sizeof(float);
-	*(CBaseEntity **)vptr = pInflictor;
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -326,18 +276,9 @@ cell_t TF2_RemoveCondition(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*, int, bool> vstk(obj, params[2], true);
 
-	unsigned char vstk[sizeof(void *) + sizeof(int) + sizeof(bool)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(int *)vptr = params[2];
-	vptr += sizeof(int);
-	*(bool *)vptr = true;
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -379,22 +320,9 @@ cell_t TF2_StunPlayer(IPluginContext *pContext, const cell_t *params)
 	}
 
 	void *obj = (void *)((uint8_t *)pEntity + playerSharedOffset->actual_offset);
+	ArgBuffer<void*, float, float, int, CBaseEntity*> vstk(obj, sp_ctof(params[2]), sp_ctof(params[3]), params[4], pAttacker);
 
-	unsigned char vstk[sizeof(void *) + 2*sizeof(float) + sizeof(int) + sizeof(CBaseEntity *)];
+	pWrapper->Execute(vstk, nullptr);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = obj;
-	vptr += sizeof(void *);
-	*(float *)vptr = sp_ctof(params[2]);
-	vptr += sizeof(float);
-	*(float *)vptr = sp_ctof(params[3]);
-	vptr += sizeof(float);
-	*(int *)vptr = params[4];
-	vptr += sizeof(int);
-	*(CBaseEntity **)vptr = pAttacker;
-
-	pWrapper->Execute(vstk, NULL);
-
 	return 1;
 }
 
@@ -419,21 +347,9 @@ cell_t TF2_SetPowerplayEnabled(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Client index %d is not valid", params[1]);
 	}
 
-	bool bEnablePP = false;
+	ArgBuffer<void*, bool> vstk(pEntity, params[2] != 0);
-	if (params[2] != 0)
-	{
-		bEnablePP = true;
-	}
-
-	unsigned char vstk[sizeof(void *) + sizeof(bool)];
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = (void *)pEntity;
-	vptr += sizeof(void *);
-	*(bool *)vptr = bEnablePP;
-
-	pWrapper->Execute(vstk, NULL);
 
+	pWrapper->Execute(vstk, nullptr);
 	return 1;
 }
 
@@ -468,14 +384,9 @@ cell_t TF2_Respawn(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Client index %d is not valid", params[1]);
 	}
 
-	unsigned char vstk[sizeof(void *)];
+	ArgBuffer<void*> vstk(pEntity);
-	unsigned char *vptr = vstk;
-
-
-	*(void **)vptr = (void *)pEntity;
-
-	pWrapper->Execute(vstk, NULL);
 
+	pWrapper->Execute(vstk, nullptr);
 	return 1;
 }
 
@@ -501,15 +412,9 @@ cell_t TF2_Regenerate(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Client index %d is not valid", params[1]);
 	}
 	
-	unsigned char vstk[sizeof(void *) + sizeof(bool)];
+	ArgBuffer<void*, bool> vstk(pEntity, true);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = (void *)pEntity;
-	vptr += sizeof(void *);
-	*(bool *)vptr = true;
-
-	pWrapper->Execute(vstk, NULL);
 	
+	pWrapper->Execute(vstk, nullptr);
 	return 1;
 }
 
@@ -552,9 +457,7 @@ cell_t TF2_IsPlayerInDuel(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Client index %d is not valid", params[1]);
 	}
 
-	unsigned char vstk[sizeof(CBaseEntity *)];
+	ArgBuffer<CBaseEntity*> vstk(pPlayer);
-	unsigned char *vptr = vstk;
-	*(CBaseEntity **)vptr = pPlayer;
 	
 	bool retValue;
 	pWrapper->Execute(vstk, &retValue);
@@ -596,14 +499,9 @@ cell_t TF2_IsHolidayActive(IPluginContext *pContext, const cell_t *params)
 		g_RegNatives.Register(pWrapper);
 	}
 
-	unsigned char vstk[sizeof(void *) + sizeof(int)];
+	ArgBuffer<void*, int> vstk(pGameRules, params[1]);
-	unsigned char *vptr = vstk;
-	*(void **)vptr = pGameRules;
-	vptr += sizeof(void *);
-	*(int *)vptr = params[1];
 
 	bool retValue;
-
 	pWrapper->Execute(vstk, &retValue);
 
 	return (retValue) ? 1 : 0;
@@ -646,15 +544,9 @@ cell_t TF2_RemoveWearable(IPluginContext *pContext, const cell_t *params)
 		return pContext->ThrowNativeError("Wearable index %d is not valid", params[2]);
 	}
 
-	unsigned char vstk[sizeof(void *) + sizeof(CBaseEntity *)];
+	ArgBuffer<void*, CBaseEntity*> vstk(pEntity, pWearable);
-	unsigned char *vptr = vstk;
-
-	*(void **)vptr = (void *)pEntity;
-	vptr += sizeof(void *);
-	*(CBaseEntity **)vptr = pWearable;
-
-	pWrapper->Execute(vstk, NULL);
 
+	pWrapper->Execute(vstk, nullptr);
 	return 1;
 }
 

public/sm_argbuffer.h

@@ -0,0 +1,77 @@
+/**
+ * vim: set ts=4 :
+ * =============================================================================
+ * SourceMod
+ * Copyright (C) 2004-2019 AlliedModders LLC.  All rights reserved.
+ * =============================================================================
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, version 3.0, as published by the
+ * Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As a special exception, AlliedModders LLC gives you permission to link the
+ * code of this program (as well as its derivative works) to "Half-Life 2," the
+ * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
+ * by the Valve Corporation.  You must obey the GNU General Public License in
+ * all respects for all other code used.  Additionally, AlliedModders LLC grants
+ * this exception to all derivative works.  AlliedModders LLC defines further
+ * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
+ * or <http://www.sourcemod.net/license.php>.
+ *
+ * Version: $Id$
+ */
+ 
+/**
+ * A type-safe abstraction for creating a contiguous blob of memory used for 
+ * vtable function calls. This blob contains the parameters to be passed into
+ * the function call.
+ */
+template <typename T, typename...Rest>
+class ArgBuffer {
+public:
+	ArgBuffer(T t, Rest... rest) {
+		unsigned char *ptr = buff;
+		buildbuffer(&ptr, t, rest...);
+	}
+
+	operator void*() { return buff; }
+	operator unsigned char*() { return buff; }
+
+	constexpr int size() const {
+		return sizeof(buff);
+	}
+
+private:
+	template <typename K>
+	constexpr static int sizetypes() {
+		return sizeof(K);
+	}
+	template <typename K, typename K2, typename... Kn>
+	constexpr static int sizetypes() {
+		return sizeof(K) + sizetypes<K2, Kn...>();
+	}
+
+	template <typename K>
+	void buildbuffer(unsigned char **ptr, K k) {
+		memcpy(*ptr, &k, sizeof(k));
+		*ptr += sizeof(K);
+	}
+
+	template <typename K, typename... Kn>
+	void buildbuffer(unsigned char **ptr, K k, Kn... kn) {
+		buildbuffer(ptr, k);
+		if (sizeof...(kn)!=0)
+			buildbuffer(ptr, kn...);
+	}
+
+private:
+	unsigned char buff[sizetypes<T, Rest...>()];
+};