796 lines
17 KiB
C++
796 lines
17 KiB
C++
/**
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* vim: set ts=4 sw=4 tw=99 noet :
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* =============================================================================
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* SourceMod
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* Copyright (C) 2004-2008 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 <assert.h>
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#include <stdarg.h>
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#include <string.h>
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#include "ForwardSys.h"
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#include "DebugReporter.h"
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#include "common_logic.h"
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CForwardManager g_Forwards;
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/**
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* Genesis turns to its source, reduction occurs stepwise although the essence is all one.
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* End of line. FTL system check.
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*
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* :TODO: WHAT NEEDS TO BE TESTED IN THIS BEAST
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* VARARG FUNCTIONS:
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* - Pushing no varargs
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*/
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// :TODO: IMPORTANT!!! The result pointer arg in the execute function maybe invalid if the forward fails
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// so later evaluation of this result may cause problems on higher levels of abstraction. DOCUMENT OR FIX ALL FORWARDS!
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CForwardManager::~CForwardManager()
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{
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CStack<CForward *>::iterator iter;
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for (iter=m_FreeForwards.begin(); iter!=m_FreeForwards.end(); iter++)
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{
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delete (*iter);
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}
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m_FreeForwards.popall();
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}
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void CForwardManager::OnSourceModAllInitialized()
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{
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scripts->AddPluginsListener(this);
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sharesys->AddInterface(NULL, this);
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}
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IForward *CForwardManager::CreateForward(const char *name, ExecType et, unsigned int num_params, const ParamType *types, ...)
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{
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CForward *fwd;
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va_list ap;
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va_start(ap, types);
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fwd = CForward::CreateForward(name, et, num_params, types, ap);
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va_end(ap);
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if (fwd)
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{
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scripts->AddFunctionsToForward(name, fwd);
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m_managed.push_back(fwd);
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}
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return fwd;
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}
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IChangeableForward *CForwardManager::CreateForwardEx(const char *name, ExecType et, int num_params, const ParamType *types, ...)
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{
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CForward *fwd;
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va_list ap;
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va_start(ap, types);
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fwd = CForward::CreateForward(name, et, num_params, types, ap);
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va_end(ap);
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if (fwd)
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{
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m_unmanaged.push_back(fwd);
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}
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return fwd;
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}
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void CForwardManager::OnPluginLoaded(IPlugin *plugin)
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{
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/* Attach any globally managed forwards */
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List<CForward *>::iterator iter;
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CForward *fwd;
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for (iter=m_managed.begin(); iter!=m_managed.end(); iter++)
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{
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fwd = (*iter);
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IPluginFunction *pFunc = plugin->GetBaseContext()->GetFunctionByName(fwd->GetForwardName());
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if (pFunc)
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{
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fwd->AddFunction(pFunc);
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}
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}
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}
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void CForwardManager::OnPluginUnloaded(IPlugin *plugin)
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{
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List<CForward *>::iterator iter;
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CForward *fwd;
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for (iter=m_managed.begin(); iter!=m_managed.end(); iter++)
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{
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fwd = (*iter);
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fwd->RemoveFunctionsOfPlugin(plugin);
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}
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for (iter=m_unmanaged.begin(); iter!=m_unmanaged.end(); iter++)
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{
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fwd = (*iter);
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fwd->RemoveFunctionsOfPlugin(plugin);
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}
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}
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IForward *CForwardManager::FindForward(const char *name, IChangeableForward **ifchng)
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{
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List<CForward *>::iterator iter;
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CForward *fwd;
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for (iter=m_managed.begin(); iter!=m_managed.end(); iter++)
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{
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fwd = (*iter);
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if (strcmp(fwd->GetForwardName(), name) == 0)
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{
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if (ifchng)
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{
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*ifchng = NULL;
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}
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return fwd;
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}
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}
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for (iter=m_unmanaged.begin(); iter!=m_unmanaged.end(); iter++)
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{
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fwd = (*iter);
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if (strcmp(fwd->GetForwardName(), name) == 0)
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{
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if (ifchng)
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{
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*ifchng = fwd;
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}
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return fwd;
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}
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}
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if (ifchng)
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{
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*ifchng = NULL;
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}
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return NULL;
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}
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void CForwardManager::ReleaseForward(IForward *forward)
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{
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ForwardFree(static_cast<CForward *>(forward));
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}
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void CForwardManager::ForwardFree(CForward *fwd)
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{
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if (fwd == NULL)
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{
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return;
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}
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m_FreeForwards.push(fwd);
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m_managed.remove(fwd);
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m_unmanaged.remove(fwd);
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}
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CForward *CForwardManager::ForwardMake()
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{
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CForward *fwd;
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if (m_FreeForwards.empty())
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{
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fwd = new CForward;
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} else {
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fwd = m_FreeForwards.front();
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m_FreeForwards.pop();
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}
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return fwd;
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}
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void CForwardManager::OnPluginPauseChange(IPlugin *plugin, bool paused)
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{
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if(paused)
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return;
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/* Attach any globally managed forwards */
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List<CForward *>::iterator iter;
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CForward *fwd;
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for (iter=m_managed.begin(); iter!=m_managed.end(); iter++)
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{
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fwd = (*iter);
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IPluginFunction *pFunc = plugin->GetBaseContext()->GetFunctionByName(fwd->GetForwardName());
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// Only add functions, if they aren't registered yet!
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if (pFunc && !fwd->IsFunctionRegistered(pFunc))
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{
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fwd->AddFunction(pFunc);
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}
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}
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}
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/*************************************
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* ACTUAL FORWARD API IMPLEMENTATION *
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*************************************/
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CForward *CForward::CreateForward(const char *name, ExecType et, unsigned int num_params, const ParamType *types, va_list ap)
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{
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ParamType _types[SP_MAX_EXEC_PARAMS];
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if (num_params > SP_MAX_EXEC_PARAMS)
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{
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return NULL;
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}
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if (types == NULL && num_params)
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{
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for (unsigned int i=0; i<num_params; i++)
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{
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_types[i] = (ParamType)va_arg(ap, int);
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if (_types[i] == Param_VarArgs && (i != num_params - 1))
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{
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return NULL;
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}
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}
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types = _types;
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} else {
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for (unsigned int i=0; i<num_params; i++)
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{
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_types[i] = types[i];
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if (types[i] == Param_VarArgs && (i != num_params - 1))
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{
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return NULL;
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}
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}
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}
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/* First parameter can never be varargs */
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if (num_params && _types[0] == Param_VarArgs)
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{
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return NULL;
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}
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CForward *pForward = g_Forwards.ForwardMake();
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pForward->m_IterGuard = NULL;
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pForward->m_curparam = 0;
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pForward->m_ExecType = et;
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snprintf(pForward->m_name, FORWARDS_NAME_MAX, "%s", name ? name : "");
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for (unsigned int i=0; i<num_params; i++)
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{
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pForward->m_types[i] = _types[i];
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}
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if (num_params && _types[num_params-1] == Param_VarArgs)
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{
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pForward->m_varargs = num_params--;
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} else {
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pForward->m_varargs = false;
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}
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pForward->m_numparams = num_params;
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pForward->m_errstate = SP_ERROR_NONE;
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pForward->m_functions.clear();
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return pForward;
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}
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int CForward::Execute(cell_t *result, IForwardFilter *filter)
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{
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if (m_errstate)
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{
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int err = m_errstate;
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Cancel();
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return err;
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}
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FuncIter iter = m_functions.begin();
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IPluginFunction *func;
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cell_t cur_result = 0;
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cell_t high_result = 0;
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cell_t low_result = 0;
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int err;
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unsigned int success=0;
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unsigned int num_params = m_curparam;
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FwdParamInfo temp_info[SP_MAX_EXEC_PARAMS];
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FwdParamInfo *param;
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ParamType type;
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/* Save local, reset */
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memcpy(temp_info, m_params, sizeof(m_params));
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m_curparam = 0;
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FuncIteratorGuard guard(&m_IterGuard, &iter);
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while (iter != m_functions.end())
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{
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func = (*iter);
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if (filter)
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filter->Preprocess(func, temp_info);
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for (unsigned int i=0; i<num_params; i++)
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{
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int err = SP_ERROR_PARAM;
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param = &temp_info[i];
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if (i >= m_numparams || m_types[i] == Param_Any)
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{
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type = param->pushedas;
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}
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else
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{
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type = m_types[i];
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}
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if ((i >= m_numparams) || (type & SP_PARAMFLAG_BYREF))
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{
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/* If we're byref or we're vararg, we always push everything by ref.
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* Even if they're byval, we must push them byref.
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*/
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if (type == Param_String)
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{
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err = func->PushStringEx((char *)param->byref.orig_addr, param->byref.cells, param->byref.sz_flags, param->byref.flags);
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}
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else if (type == Param_Float || type == Param_Cell)
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{
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err = func->PushCellByRef(¶m->val);
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}
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else
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{
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err = func->PushArray(param->byref.orig_addr, param->byref.cells, param->byref.flags);
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assert(type == Param_Array || type == Param_FloatByRef || type == Param_CellByRef);
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}
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}
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else
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{
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/* If we're not byref or not vararg, our job is a bit easier. */
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assert(type == Param_Cell || type == Param_Float);
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err = func->PushCell(param->val);
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}
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if (err != SP_ERROR_NONE)
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{
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g_DbgReporter.GenerateError(func->GetParentContext(),
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func->GetFunctionID(),
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err,
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"Failed to push parameter while executing forward");
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continue;
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}
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}
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/* Call the function and deal with the return value. */
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if ((err=func->Execute(&cur_result)) == SP_ERROR_NONE)
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{
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success++;
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switch (m_ExecType)
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{
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case ET_Event:
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{
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if (cur_result > high_result)
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{
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high_result = cur_result;
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}
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break;
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}
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case ET_Hook:
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{
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if (cur_result > high_result)
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{
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high_result = cur_result;
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if ((ResultType)high_result == Pl_Stop)
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{
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goto done;
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}
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}
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break;
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}
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case ET_LowEvent:
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{
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/* Check if the current result is the lowest so far (or if it's the first result) */
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if (cur_result < low_result || success == 1)
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{
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low_result = cur_result;
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}
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break;
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}
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default:
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{
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break;
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}
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}
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}
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if (!guard.Triggered())
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iter++;
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}
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done:
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if (success)
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{
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switch (m_ExecType)
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{
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case ET_Ignore:
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{
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cur_result = 0;
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break;
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}
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case ET_Event:
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case ET_Hook:
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{
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cur_result = high_result;
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break;
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}
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case ET_LowEvent:
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{
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cur_result = low_result;
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break;
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}
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default:
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{
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break;
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}
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}
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if (result)
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{
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*result = cur_result;
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}
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}
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return SP_ERROR_NONE;
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}
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int CForward::PushCell(cell_t cell)
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{
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if (m_curparam < m_numparams)
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{
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if (m_types[m_curparam] == Param_Any)
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{
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m_params[m_curparam].pushedas = Param_Cell;
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} else if (m_types[m_curparam] != Param_Cell) {
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return SetError(SP_ERROR_PARAM);
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}
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} else {
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if (!m_varargs || m_numparams > SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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m_params[m_curparam].pushedas = Param_Cell;
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}
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m_params[m_curparam++].val = cell;
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return SP_ERROR_NONE;
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}
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int CForward::PushFloat(float number)
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{
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if (m_curparam < m_numparams)
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{
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if (m_types[m_curparam] == Param_Any)
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{
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m_params[m_curparam].pushedas = Param_Float;
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} else if (m_types[m_curparam] != Param_Float) {
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return SetError(SP_ERROR_PARAM);
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}
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} else {
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if (!m_varargs || m_numparams > SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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m_params[m_curparam].pushedas = Param_Float;
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}
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m_params[m_curparam++].val = *(cell_t *)&number;
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return SP_ERROR_NONE;
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}
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int CForward::PushCellByRef(cell_t *cell, int flags)
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{
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if (m_curparam < m_numparams)
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{
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if (m_types[m_curparam] == Param_Any)
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{
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m_params[m_curparam].pushedas = Param_CellByRef;
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} else if (m_types[m_curparam] != Param_CellByRef) {
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return SetError(SP_ERROR_PARAM);
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}
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} else {
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if (!m_varargs || m_numparams > SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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m_params[m_curparam].pushedas = Param_CellByRef;
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}
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_Int_PushArray(cell, 1, flags);
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m_curparam++;
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return SP_ERROR_NONE;
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}
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int CForward::PushFloatByRef(float *num, int flags)
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{
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if (m_curparam < m_numparams)
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{
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if (m_types[m_curparam] == Param_Any)
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{
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m_params[m_curparam].pushedas = Param_FloatByRef;
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} else if (m_types[m_curparam] != Param_FloatByRef) {
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return SetError(SP_ERROR_PARAM);
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}
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} else {
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if (!m_varargs || m_numparams > SP_MAX_EXEC_PARAMS)
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{
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return SetError(SP_ERROR_PARAMS_MAX);
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}
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m_params[m_curparam].pushedas = Param_FloatByRef;
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}
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_Int_PushArray((cell_t *)num, 1, flags);
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m_curparam++;
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return SP_ERROR_NONE;
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}
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void CForward::_Int_PushArray(cell_t *inarray, unsigned int cells, int flags)
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{
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m_params[m_curparam].byref.cells = cells;
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m_params[m_curparam].byref.flags = flags;
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m_params[m_curparam].byref.orig_addr = inarray;
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}
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int CForward::PushArray(cell_t *inarray, unsigned int cells, int flags)
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{
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/* We don't allow this here */
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if (!inarray)
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{
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return SetError(SP_ERROR_PARAM);
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}
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if (m_curparam < m_numparams)
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{
|
|
if (m_types[m_curparam] == Param_Any)
|
|
{
|
|
m_params[m_curparam].pushedas = Param_Array;
|
|
} else if (m_types[m_curparam] != Param_Array) {
|
|
return SetError(SP_ERROR_PARAM);
|
|
}
|
|
} else {
|
|
if (!m_varargs || m_curparam > SP_MAX_EXEC_PARAMS)
|
|
{
|
|
return SetError(SP_ERROR_PARAMS_MAX);
|
|
}
|
|
m_params[m_curparam].pushedas = Param_Array;
|
|
}
|
|
|
|
_Int_PushArray(inarray, cells, flags);
|
|
|
|
m_curparam++;
|
|
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
void CForward::_Int_PushString(cell_t *inarray, unsigned int cells, int sz_flags, int cp_flags)
|
|
{
|
|
m_params[m_curparam].byref.cells = cells; /* Notice this contains the char count not cell count */
|
|
m_params[m_curparam].byref.flags = cp_flags;
|
|
m_params[m_curparam].byref.orig_addr = inarray;
|
|
m_params[m_curparam].byref.sz_flags = sz_flags;
|
|
}
|
|
|
|
int CForward::PushString(const char *string)
|
|
{
|
|
if (m_curparam < m_numparams)
|
|
{
|
|
if (m_types[m_curparam] == Param_Any)
|
|
{
|
|
m_params[m_curparam].pushedas = Param_String;
|
|
} else if (m_types[m_curparam] != Param_String) {
|
|
return SetError(SP_ERROR_PARAM);
|
|
}
|
|
} else {
|
|
if (!m_varargs || m_curparam > SP_MAX_EXEC_PARAMS)
|
|
{
|
|
return SetError(SP_ERROR_PARAMS_MAX);
|
|
}
|
|
m_params[m_curparam].pushedas = Param_String;
|
|
}
|
|
|
|
_Int_PushString((cell_t *)string, strlen(string)+1, SM_PARAM_STRING_COPY, 0);
|
|
m_curparam++;
|
|
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
int CForward::PushStringEx(char *buffer, size_t length, int sz_flags, int cp_flags)
|
|
{
|
|
if (m_curparam < m_numparams)
|
|
{
|
|
if (m_types[m_curparam] == Param_Any)
|
|
{
|
|
m_params[m_curparam].pushedas = Param_String;
|
|
} else if (m_types[m_curparam] != Param_String) {
|
|
return SetError(SP_ERROR_PARAM);
|
|
}
|
|
} else {
|
|
if (!m_varargs || m_curparam > SP_MAX_EXEC_PARAMS)
|
|
{
|
|
return SetError(SP_ERROR_PARAMS_MAX);
|
|
}
|
|
m_params[m_curparam].pushedas = Param_String;
|
|
}
|
|
|
|
_Int_PushString((cell_t *)buffer, length, sz_flags, cp_flags);
|
|
m_curparam++;
|
|
|
|
return SP_ERROR_NONE;
|
|
}
|
|
|
|
void CForward::Cancel()
|
|
{
|
|
if (!m_curparam)
|
|
{
|
|
return;
|
|
}
|
|
|
|
m_curparam = 0;
|
|
m_errstate = SP_ERROR_NONE;
|
|
}
|
|
|
|
bool CForward::AddFunction(IPluginContext *pContext, funcid_t index)
|
|
{
|
|
IPluginFunction *pFunc = pContext->GetFunctionById(index);
|
|
|
|
if (!pFunc)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return AddFunction(pFunc);
|
|
}
|
|
|
|
bool CForward::RemoveFunction(IPluginContext *pContext, funcid_t index)
|
|
{
|
|
IPluginFunction *pFunc = pContext->GetFunctionById(index);
|
|
|
|
if (!pFunc)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
return RemoveFunction(pFunc);
|
|
}
|
|
|
|
bool CForward::RemoveFunction(IPluginFunction *func)
|
|
{
|
|
bool found = false;
|
|
FuncIter iter;
|
|
List<IPluginFunction *> *lst;
|
|
|
|
if (func->IsRunnable())
|
|
{
|
|
lst = &m_functions;
|
|
} else {
|
|
lst = &m_paused;
|
|
}
|
|
|
|
for (iter=lst->begin(); iter!=lst->end(); iter++)
|
|
{
|
|
if ((*iter) == func)
|
|
{
|
|
m_IterGuard->FixIteratorChain(iter);
|
|
found = true;
|
|
lst->erase(iter);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* Cancel a call, if any */
|
|
if (found || m_curparam)
|
|
{
|
|
func->Cancel();
|
|
}
|
|
|
|
return found;
|
|
}
|
|
|
|
unsigned int CForward::RemoveFunctionsOfPlugin(IPlugin *plugin)
|
|
{
|
|
FuncIter iter;
|
|
IPluginFunction *func;
|
|
unsigned int removed = 0;
|
|
IPluginContext *pContext = plugin->GetBaseContext();
|
|
for (iter=m_functions.begin(); iter!=m_functions.end();)
|
|
{
|
|
func = (*iter);
|
|
if (func->GetParentContext() == pContext)
|
|
{
|
|
iter = m_functions.erase(iter);
|
|
removed++;
|
|
} else {
|
|
iter++;
|
|
}
|
|
}
|
|
|
|
return removed;
|
|
}
|
|
|
|
bool CForward::AddFunction(IPluginFunction *func)
|
|
{
|
|
if (m_curparam)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (func->IsRunnable())
|
|
{
|
|
m_functions.push_back(func);
|
|
} else {
|
|
m_paused.push_back(func);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool CForward::IsFunctionRegistered(IPluginFunction *func)
|
|
{
|
|
FuncIter iter;
|
|
List<IPluginFunction *> *lst;
|
|
|
|
if (func->IsRunnable())
|
|
{
|
|
lst = &m_functions;
|
|
} else {
|
|
lst = &m_paused;
|
|
}
|
|
|
|
for (iter=m_functions.begin(); iter!=m_functions.end(); iter++)
|
|
{
|
|
if ((*iter) == func)
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
const char *CForward::GetForwardName()
|
|
{
|
|
return m_name;
|
|
}
|
|
|
|
unsigned int CForward::GetFunctionCount()
|
|
{
|
|
return m_functions.size();
|
|
}
|
|
|
|
ExecType CForward::GetExecType()
|
|
{
|
|
return m_ExecType;
|
|
}
|