365 lines
8.8 KiB
C++
365 lines
8.8 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod SDKTools Extension
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* Copyright (C) 2004-2010 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*
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* Version: $Id$
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*/
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#include "extension.h"
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#include "output.h"
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ISourcePawnEngine *spengine = NULL;
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EntityOutputManager g_OutputManager;
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CDetour *fireOutputDetour = NULL;
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EntityOutputManager::EntityOutputManager()
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{
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info_address = NULL;
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info_callback = NULL;
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HookCount = 0;
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enabled = false;
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}
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void EntityOutputManager::Shutdown()
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{
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if (!enabled)
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{
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return;
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}
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EntityOutputs->Destroy();
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ClassNames->Destroy();
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fireOutputDetour->Destroy();
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}
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void EntityOutputManager::Init()
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{
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enabled = CreateFireEventDetour();
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if (!enabled)
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{
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return;
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}
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EntityOutputs = adtfactory->CreateBasicTrie();
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ClassNames = adtfactory->CreateBasicTrie();
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}
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bool EntityOutputManager::IsEnabled()
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{
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return enabled;
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}
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#ifdef PLATFORM_WINDOWS
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DETOUR_DECL_MEMBER8(FireOutput, void, int, what, int, the, int, hell, int, msvc, void *, variant_t, CBaseEntity *, pActivator, CBaseEntity *, pCaller, float, fDelay)
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{
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g_OutputManager.FireEventDetour((void *)this, pActivator, pCaller, fDelay);
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DETOUR_MEMBER_CALL(FireOutput)(what, the, hell, msvc, variant_t, pActivator, pCaller, fDelay);
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}
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#else
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DETOUR_DECL_MEMBER4(FireOutput, void, void *, variant_t, CBaseEntity *, pActivator, CBaseEntity *, pCaller, float, fDelay)
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{
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g_OutputManager.FireEventDetour((void *)this, pActivator, pCaller, fDelay);
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DETOUR_MEMBER_CALL(FireOutput)(variant_t, pActivator, pCaller, fDelay);
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}
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#endif
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bool EntityOutputManager::CreateFireEventDetour()
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{
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fireOutputDetour = DETOUR_CREATE_MEMBER(FireOutput, "FireOutput");
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if (fireOutputDetour) return true;
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return false;
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}
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void EntityOutputManager::FireEventDetour(void *pOutput, CBaseEntity *pActivator, CBaseEntity *pCaller, float fDelay)
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{
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if (!pCaller)
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{
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return;
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}
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char sOutput[20];
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Q_snprintf(sOutput, sizeof(sOutput), "%p", pOutput);
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// attempt to directly lookup a hook using the pOutput pointer
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OutputNameStruct *pOutputName = NULL;
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bool fastLookup = false;
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// Fast lookup failed - check the slow way for hooks that haven't fired yet
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if ((fastLookup = EntityOutputs->Retrieve(sOutput, (void **)&pOutputName)) == false)
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{
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const char *classname = GetEntityClassname(pCaller);
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const char *outputname = FindOutputName(pOutput, pCaller);
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if (!outputname)
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{
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return;
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}
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pOutputName = FindOutputPointer(classname, outputname, false);
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if (!pOutputName)
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{
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return;
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}
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}
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if (!pOutputName->hooks.empty())
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{
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if (!fastLookup)
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{
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// hook exists on this classname and output - map it into our quick find trie
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EntityOutputs->Insert(sOutput, pOutputName);
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}
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SourceHook::List<omg_hooks *>::iterator _iter;
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omg_hooks *hook;
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_iter = pOutputName->hooks.begin();
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while (_iter != pOutputName->hooks.end())
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{
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hook = (omg_hooks *)*_iter;
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hook->in_use = true;
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cell_t ref = gamehelpers->EntityToReference(pCaller);
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if (hook->entity_ref != -1
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&& gamehelpers->ReferenceToIndex(hook->entity_ref) == gamehelpers->ReferenceToIndex(ref)
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&& ref != hook->entity_ref)
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{
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// same entity index but different reference. Entity has changed, kill the hook.
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_iter = pOutputName->hooks.erase(_iter);
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CleanUpHook(hook);
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continue;
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}
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if (hook->entity_ref == -1 || hook->entity_ref == ref) // Global classname hook
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{
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//fire the forward to hook->pf
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hook->pf->PushString(pOutputName->Name);
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hook->pf->PushCell(gamehelpers->ReferenceToBCompatRef(ref));
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hook->pf->PushCell(gamehelpers->EntityToBCompatRef(pActivator));
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//hook->pf->PushCell(handle);
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hook->pf->PushFloat(fDelay);
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hook->pf->Execute(NULL);
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if ((hook->entity_ref != -1) && hook->only_once)
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{
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_iter = pOutputName->hooks.erase(_iter);
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CleanUpHook(hook);
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continue;
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}
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if (hook->delete_me)
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{
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_iter = pOutputName->hooks.erase(_iter);
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CleanUpHook(hook);
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continue;
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}
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}
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hook->in_use = false;
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_iter++;
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}
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}
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}
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omg_hooks *EntityOutputManager::NewHook()
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{
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omg_hooks *hook;
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if (FreeHooks.empty())
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{
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hook = new omg_hooks;
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}
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else
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{
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hook = g_OutputManager.FreeHooks.front();
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g_OutputManager.FreeHooks.pop();
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}
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return hook;
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}
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void EntityOutputManager::OnHookAdded()
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{
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HookCount++;
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if (HookCount == 1)
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{
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// This is the first hook created
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fireOutputDetour->EnableDetour();
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}
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}
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void EntityOutputManager::OnHookRemoved()
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{
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HookCount--;
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if (HookCount == 0)
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{
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fireOutputDetour->DisableDetour();
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}
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}
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void EntityOutputManager::CleanUpHook(omg_hooks *hook)
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{
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FreeHooks.push(hook);
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OnHookRemoved();
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IPlugin *pPlugin = plsys->FindPluginByContext(hook->pf->GetParentContext()->GetContext());
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SourceHook::List<omg_hooks *> *pList = NULL;
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if (!pPlugin->GetProperty("OutputHookList", (void **)&pList, false) || !pList)
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{
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return;
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}
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SourceHook::List<omg_hooks *>::iterator p_iter = pList->begin();
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omg_hooks *pluginHook;
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while (p_iter != pList->end())
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{
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pluginHook = (omg_hooks *)*p_iter;
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if (pluginHook == hook)
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{
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p_iter = pList->erase(p_iter);
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}
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else
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{
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p_iter++;
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}
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}
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}
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void EntityOutputManager::OnPluginDestroyed(IPlugin *plugin)
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{
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SourceHook::List<omg_hooks *> *pList = NULL;
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if (plugin->GetProperty("OutputHookList", (void **)&pList, true))
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{
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SourceHook::List<omg_hooks *>::iterator p_iter = pList->begin();
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omg_hooks *hook;
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while (p_iter != pList->end())
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{
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hook = (omg_hooks *)*p_iter;
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p_iter = pList->erase(p_iter); //remove from this plugins list
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hook->m_parent->hooks.remove(hook); // remove from the y's list
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FreeHooks.push(hook); //save the omg_hook
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OnHookRemoved();
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}
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}
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}
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OutputNameStruct *EntityOutputManager::FindOutputPointer(const char *classname, const char *outputname, bool create)
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{
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ClassNameStruct *pClassname;
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if (!ClassNames->Retrieve(classname, (void **)&pClassname))
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{
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if (create)
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{
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pClassname = new ClassNameStruct;
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ClassNames->Insert(classname, pClassname);
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}
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else
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{
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return NULL;
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}
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}
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OutputNameStruct *pOutputName;
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if (!pClassname->OutputList->Retrieve(outputname, (void **)&pOutputName))
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{
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if (create)
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{
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pOutputName = new OutputNameStruct;
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pClassname->OutputList->Insert(outputname, pOutputName);
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strncpy(pOutputName->Name, outputname, sizeof(pOutputName->Name));
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pOutputName->Name[49] = 0;
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}
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else
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{
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return NULL;
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}
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}
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return pOutputName;
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}
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// Iterate the datamap of pCaller and look for output pointers with the same address as pOutput
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const char *EntityOutputManager::FindOutputName(void *pOutput, CBaseEntity *pCaller)
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{
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datamap_t *pMap = gamehelpers->GetDataMap(pCaller);
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while (pMap)
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{
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for (int i=0; i<pMap->dataNumFields; i++)
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{
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if (pMap->dataDesc[i].flags & FTYPEDESC_OUTPUT)
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{
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if ((char *)pCaller + GetTypeDescOffs(&pMap->dataDesc[i]) == pOutput)
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{
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return pMap->dataDesc[i].externalName;
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}
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}
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}
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pMap = pMap->baseMap;
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}
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return NULL;
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}
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const char *EntityOutputManager::GetEntityClassname(CBaseEntity *pEntity)
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{
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static int offset = -1;
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if (offset == -1)
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{
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datamap_t *pMap = gamehelpers->GetDataMap(pEntity);
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typedescription_t *pDesc = gamehelpers->FindInDataMap(pMap, "m_iClassname");
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offset = GetTypeDescOffs(pDesc);
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}
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return *(const char **)(((unsigned char *)pEntity) + offset);
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}
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