/**

  * vim: set ts=4 :

  * =============================================================================

  * SourceMod Team Fortress 2 Extension

  * Copyright (C) 2004-2011 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: $Id$

  */

 #include "extension.h"

 #include "conditions.h"

 #include "util.h"

 #include <iplayerinfo.h>

 typedef struct condflags_s {

 	uint64_t upper;

 	uint64_t lower;

 } condflags_t;

 condflags_t condflags_empty = { 0, 0 };

 condflags_t g_PlayerConds[MAXPLAYERS+1];

 IForward *g_addCondForward = NULL;

 IForward *g_removeCondForward = NULL;

 int playerCondOffset = -1;

 int playerCondExOffset = -1;

 int playerCondEx2Offset = -1;

 int conditionBitsOffset = -1;

 bool g_bIgnoreRemove;

 #define MAX_CONDS (sizeof(uint64_t) * 8)

 inline condflags_t GetPlayerConds(CBaseEntity *pPlayer)

 {

 	condflags_t result;

 	uint32_t playerCond    =  *(uint32_t *)((intptr_t)pPlayer + playerCondOffset);

 	uint32_t condBits      =  *(uint32_t *)((intptr_t)pPlayer + conditionBitsOffset);

 	uint32_t playerCondEx  =  *(uint32_t *)((intptr_t)pPlayer + playerCondExOffset);

 	uint32_t playerCondEx2 =  *(uint32_t *)((intptr_t)pPlayer + playerCondEx2Offset);

 	uint64_t playerCondExAdj = playerCondEx;

 	playerCondExAdj <<= 32;

 	result.lower = playerCond|condBits|playerCondExAdj;

 	result.upper = playerCondEx2;

 	return result;

 }

 void Conditions_OnGameFrame(bool simulating)

 {

 	if (!simulating)

 		return;

 	condflags_t oldconds;

 	condflags_t newconds;

 	condflags_t addedconds;

 	condflags_t removedconds;

 	int maxClients = gpGlobals->maxClients;

 	for (int i = 1; i <= maxClients; i++)

 	{

 		IGamePlayer *pPlayer = playerhelpers->GetGamePlayer(i);

 		if (!pPlayer || !pPlayer->IsInGame())

 			continue;

 		IPlayerInfo *info = pPlayer->GetPlayerInfo();

 		if (info->IsHLTV() || info->IsReplay())

 			continue;

 		CBaseEntity *pEntity = gamehelpers->ReferenceToEntity(i);

 		oldconds = g_PlayerConds[i];

 		newconds = GetPlayerConds(pEntity);

 		if (oldconds.lower == newconds.lower && oldconds.upper == newconds.upper)

 			continue;

 		addedconds.lower = newconds.lower &~ oldconds.lower;

 		removedconds.lower = oldconds.lower &~ newconds.lower;

 		addedconds.upper = newconds.upper &~ oldconds.upper;

 		removedconds.upper = oldconds.upper &~ newconds.upper;

 		uint64_t j;

 		uint64_t bit;

 		uint64_t maxbit = MAX(addedconds.lower, addedconds.upper);

 		for (j = 0; j < MAX_CONDS && (bit = ((uint64_t)1 << j)) <= maxbit; j++)

 		{

 			if ((addedconds.lower & bit) == bit)

 			{

 				g_addCondForward->PushCell(i);

 				g_addCondForward->PushCell(j & 0xFFFFFFFF);

 				g_addCondForward->Execute(NULL, NULL);

 			}

 			if ((addedconds.upper & bit) == bit)

 			{

 				g_addCondForward->PushCell(i);

 				g_addCondForward->PushCell((j+64) & 0xFFFFFFFF);

 				g_addCondForward->Execute(NULL, NULL);

 			}

 		}

 		maxbit = MAX(removedconds.lower, removedconds.upper);

 		for (j = 0; j < MAX_CONDS && (bit = ((uint64_t)1 << j)) <= maxbit; j++)

 		{

 			if ((removedconds.lower & bit) == bit)

 			{

 				g_removeCondForward->PushCell(i);

 				g_removeCondForward->PushCell(j & 0xFFFFFFFF);

 				g_removeCondForward->Execute(NULL, NULL);

 			}

 			if ((removedconds.upper & bit) == bit)

 			{

 				g_removeCondForward->PushCell(i);

 				g_removeCondForward->PushCell((j+64) & 0xFFFFFFFF);

 				g_removeCondForward->Execute(NULL, NULL);

 			}

 		}

 		g_PlayerConds[i] = newconds;

 	}

 }

 bool InitialiseConditionChecks()

 {

 	sm_sendprop_info_t prop;

 	if (!gamehelpers->FindSendPropInfo("CTFPlayer", "m_nPlayerCond", &prop))

 	{

 		g_pSM->LogError(myself, "Failed to find m_nPlayerCond prop offset");

 		return false;

 	}

 	playerCondOffset = prop.actual_offset;

 	if (!gamehelpers->FindSendPropInfo("CTFPlayer", "_condition_bits", &prop))

 	{

 		g_pSM->LogError(myself, "Failed to find _condition_bits prop offset");

 		return false;

 	}

 	conditionBitsOffset = prop.actual_offset;

 	if (!gamehelpers->FindSendPropInfo("CTFPlayer", "m_nPlayerCondEx", &prop))

 	{

 		g_pSM->LogError(myself, "Failed to find m_nPlayerCondEx prop offset");

 		return false;

 	}

 	playerCondExOffset = prop.actual_offset;

 	if (!gamehelpers->FindSendPropInfo("CTFPlayer", "m_nPlayerCondEx2", &prop))

 	{

 		g_pSM->LogError(myself, "Failed to find m_nPlayerCondEx2 prop offset");

 		return false;

 	}

 	playerCondEx2Offset = prop.actual_offset;

 	if (playerCondOffset == -1 || playerCondExOffset == -1 || conditionBitsOffset == -1 || playerCondEx2Offset == -1)

 		return false;

 	int maxClients = gpGlobals->maxClients;

 	for (int i = 1; i <= maxClients; i++)

 	{

 		IGamePlayer *pPlayer = playerhelpers->GetGamePlayer(i);

 		if (!pPlayer || !pPlayer->IsInGame())

 			continue;

 		g_PlayerConds[i] = GetPlayerConds(gamehelpers->ReferenceToEntity(i));

 	}

 	g_pSM->AddGameFrameHook(Conditions_OnGameFrame);

 	return true;

 }

 void Conditions_OnClientPutInServer(int client)

 {

 	g_PlayerConds[client] = condflags_empty;

 }

 void RemoveConditionChecks()

 {

 	g_pSM->RemoveGameFrameHook(Conditions_OnGameFrame);

 }