1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/extensions/tf2/conditions.cpp Sat Apr 09 00:33:55 2011 -0400
1.3 @@ -0,0 +1,210 @@
1.4 +/**
1.5 + * vim: set ts=4 :
1.6 + * =============================================================================
1.7 + * SourceMod Team Fortress 2 Extension
1.8 + * Copyright (C) 2004-2011 AlliedModders LLC. All rights reserved.
1.9 + * =============================================================================
1.10 + *
1.11 + * This program is free software; you can redistribute it and/or modify it under
1.12 + * the terms of the GNU General Public License, version 3.0, as published by the
1.13 + * Free Software Foundation.
1.14 + *
1.15 + * This program is distributed in the hope that it will be useful, but WITHOUT
1.16 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.17 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
1.18 + * details.
1.19 + *
1.20 + * You should have received a copy of the GNU General Public License along with
1.21 + * this program. If not, see <http://www.gnu.org/licenses/>.
1.22 + *
1.23 + * As a special exception, AlliedModders LLC gives you permission to link the
1.24 + * code of this program (as well as its derivative works) to "Half-Life 2," the
1.25 + * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
1.26 + * by the Valve Corporation. You must obey the GNU General Public License in
1.27 + * all respects for all other code used. Additionally, AlliedModders LLC grants
1.28 + * this exception to all derivative works. AlliedModders LLC defines further
1.29 + * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
1.30 + * or <http://www.sourcemod.net/license.php>.
1.31 + *
1.32 + * Version: $Id$
1.33 + */
1.34 +
1.35 +#include "extension.h"
1.36 +#include "conditions.h"
1.37 +#include "util.h"
1.38 +
1.39 +typedef int condflags_t;
1.40 +#define CONDITION_TAUNTING 7
1.41 +
1.42 +IForward *g_addCondForward = NULL;
1.43 +IForward *g_removeCondForward = NULL;
1.44 +
1.45 +CDetour *detConditionAdd = NULL;
1.46 +CDetour *detConditionRemove = NULL;
1.47 +CDetour *detConditionRemoveAll = NULL;
1.48 +
1.49 +int playerCondOffset = -1;
1.50 +int conditionBitsOffset = -1;
1.51 +
1.52 +bool g_bIgnoreRemove;
1.53 +
1.54 +inline condflags_t GetPlayerConds(CBaseEntity *pPlayer)
1.55 +{
1.56 + condflags_t cond1 = *(condflags_t *)((intptr_t)pPlayer + playerCondOffset);
1.57 + condflags_t cond2 = *(condflags_t *)((intptr_t)pPlayer + conditionBitsOffset);
1.58 + return cond1|cond2;
1.59 +}
1.60 +
1.61 +DETOUR_DECL_MEMBER2(AddCond, void, int, condition, float, duration)
1.62 +{
1.63 + CBaseEntity *pPlayer = (CBaseEntity *)((intptr_t)this - playerSharedOffset->actual_offset);
1.64 + condflags_t oldconds = GetPlayerConds(pPlayer);
1.65 +
1.66 + DETOUR_MEMBER_CALL(AddCond)(condition, duration);
1.67 +
1.68 + int bit = 1 << condition;
1.69 +
1.70 + // The player already had this condition so bug out
1.71 + if ((oldconds & bit) == bit)
1.72 + return;
1.73 +
1.74 + // The condition wasn't actually added (this can happen!)
1.75 + if ((GetPlayerConds(pPlayer) & bit) != bit)
1.76 + return;
1.77 +
1.78 + int client = gamehelpers->EntityToBCompatRef(pPlayer);
1.79 +
1.80 + g_addCondForward->PushCell(client);
1.81 + g_addCondForward->PushCell(condition);
1.82 + g_addCondForward->PushFloat(duration);
1.83 + g_addCondForward->Execute(NULL, NULL);
1.84 +}
1.85 +
1.86 +DETOUR_DECL_MEMBER2(RemoveCond, void, int, condition, bool, bForceRemove)
1.87 +{
1.88 + if (g_bIgnoreRemove)
1.89 + {
1.90 + DETOUR_MEMBER_CALL(RemoveCond)(condition, bForceRemove);
1.91 + return;
1.92 + }
1.93 +
1.94 + CBaseEntity *pPlayer = (CBaseEntity *)((intptr_t)this - playerSharedOffset->actual_offset);
1.95 +
1.96 + condflags_t oldconds = GetPlayerConds(pPlayer);
1.97 + int bit = 1 << condition;
1.98 +
1.99 + // If we didn't have it, it won't be removed
1.100 + if ((oldconds & bit) != bit)
1.101 + {
1.102 + DETOUR_MEMBER_CALL(RemoveCond)(condition, bForceRemove);
1.103 + return;
1.104 + }
1.105 +
1.106 + DETOUR_MEMBER_CALL(RemoveCond)(condition, bForceRemove);
1.107 +
1.108 + // Calling RemoveCond doesn't necessarily remove the cond...
1.109 + if ((GetPlayerConds(pPlayer) & bit) == bit)
1.110 + {
1.111 + return;
1.112 + }
1.113 +
1.114 + int client = gamehelpers->EntityToBCompatRef(pPlayer);
1.115 +
1.116 + DoRemoveCond(client, condition);
1.117 +}
1.118 +
1.119 +DETOUR_DECL_MEMBER1(RemoveAllCond, void, CBaseEntity *, unknown)
1.120 +{
1.121 + // We're going to ignore Remove here since it can be called multiple times for the same cond
1.122 + g_bIgnoreRemove = true;
1.123 +
1.124 + CBaseEntity *pPlayer = (CBaseEntity *)((intptr_t)this - playerSharedOffset->actual_offset);
1.125 +
1.126 + int client = gamehelpers->EntityToBCompatRef(pPlayer);
1.127 + condflags_t conds = GetPlayerConds(pPlayer);
1.128 +
1.129 + // I don't know what the unknown is, but it's always NULL
1.130 + DETOUR_MEMBER_CALL(RemoveAllCond)(unknown);
1.131 +
1.132 + int max = sizeof(condflags_t)*8;
1.133 + for (int i = 0; i < max; i++)
1.134 + {
1.135 + // Taunt flag removal doesn't go through RemoveCond nor OnCondRemoved (or was mangled by compiler?)
1.136 + // Better to "documentedly" give no removes rather than only in some cases
1.137 + if (i == CONDITION_TAUNTING)
1.138 + continue;
1.139 +
1.140 + int bit = (1<<i);
1.141 + if ((conds & bit) == bit)
1.142 + {
1.143 + DoRemoveCond(client, i);
1.144 + }
1.145 + }
1.146 +
1.147 + g_bIgnoreRemove = false;
1.148 +}
1.149 +
1.150 +void DoRemoveCond(int client, int condition)
1.151 +{
1.152 + g_removeCondForward->PushCell(client);
1.153 + g_removeCondForward->PushCell(condition);
1.154 + g_removeCondForward->Execute(NULL, NULL);
1.155 +}
1.156 +
1.157 +bool InitialiseConditionDetours()
1.158 +{
1.159 + sm_sendprop_info_t prop;
1.160 + if (!gamehelpers->FindSendPropInfo("CTFPlayer", "m_nPlayerCond", &prop))
1.161 + {
1.162 + g_pSM->LogError(myself, "Failed to find m_nPlayerCond prop offset");
1.163 + return false;
1.164 + }
1.165 +
1.166 + playerCondOffset = prop.actual_offset;
1.167 +
1.168 + if (!gamehelpers->FindSendPropInfo("CTFPlayer", "_condition_bits", &prop))
1.169 + {
1.170 + g_pSM->LogError(myself, "Failed to find _condition_bits prop offset");
1.171 + return false;
1.172 + }
1.173 +
1.174 + conditionBitsOffset = prop.actual_offset;
1.175 +
1.176 + if (playerCondOffset == -1 || conditionBitsOffset == -1)
1.177 + return false;
1.178 +
1.179 + detConditionAdd = DETOUR_CREATE_MEMBER(AddCond, "AddCondition");
1.180 + if (detConditionAdd == NULL)
1.181 + {
1.182 + g_pSM->LogError(myself, "CTFPlayerShared::AddCond detour failed");
1.183 + return false;
1.184 + }
1.185 +
1.186 + detConditionRemove = DETOUR_CREATE_MEMBER(RemoveCond, "RemoveCondition");
1.187 + if (detConditionRemove == NULL)
1.188 + {
1.189 + g_pSM->LogError(myself, "CTFPlayerShared::RemoveCond detour failed");
1.190 + return false;
1.191 + }
1.192 +
1.193 + detConditionRemoveAll = DETOUR_CREATE_MEMBER(RemoveAllCond, "RemoveAllConditions");
1.194 + if (detConditionRemoveAll == NULL)
1.195 + {
1.196 + g_pSM->LogError(myself, "CTFPlayerShared::RemoveAllCond detour failed");
1.197 + return false;
1.198 + }
1.199 +
1.200 + detConditionAdd->EnableDetour();
1.201 + detConditionRemove->EnableDetour();
1.202 + detConditionRemoveAll->EnableDetour();
1.203 +
1.204 + return true;
1.205 +}
1.206 +
1.207 +void RemoveConditionDetours()
1.208 +{
1.209 + detConditionAdd->Destroy();
1.210 + detConditionRemove->Destroy();
1.211 + detConditionRemoveAll->Destroy();
1.212 +}
1.213 +
