faluco@739: /**
faluco@739:  * vim: set ts=4 :
faluco@739:  * ===============================================================
faluco@739:  * SourceMod, Copyright (C) 2004-2007 AlliedModders LLC. 
faluco@739:  * All rights reserved.
faluco@739:  * ===============================================================
faluco@739:  *
faluco@739:  *  This file is part of the SourceMod/SourcePawn SDK.  This file may only be 
faluco@739:  * used or modified under the Terms and Conditions of its License Agreement, 
faluco@739:  * which is found in public/licenses/LICENSE.txt.  As of this notice, derivative 
faluco@739:  * works must be licensed under the GNU General Public License (version 2 or 
faluco@739:  * greater).  A copy of the GPL is included under public/licenses/GPL.txt.
faluco@739:  * 
faluco@739:  * To view the latest information, see: http://www.sourcemod.net/license.php
faluco@739:  *
faluco@739:  * Version: $Id$
faluco@739:  */
faluco@739: 
faluco@739: #include "extension.h"
faluco@739: #include "CallWrapper.h"
faluco@739: 
faluco@739: CallWrapper::CallWrapper(CallConvention cv, const PassInfo *paramInfo, const PassInfo *retInfo, unsigned int numParams)
faluco@739: {
faluco@739: 	m_Cv = cv;
faluco@739: 
faluco@739: 	if (numParams)
faluco@739: 	{
faluco@739: 		m_Params = new PassEncode[numParams];
faluco@739: 		for (size_t i=0; i<numParams; i++)
faluco@739: 		{
faluco@739: 			m_Params[i].info = paramInfo[i];
faluco@739: 		}
faluco@739: 	}
faluco@739: 
faluco@739: 	if (retInfo)
faluco@739: 	{
faluco@739: 		m_RetParam = new PassInfo;
faluco@739: 		*m_RetParam = *retInfo;
faluco@739: 	} else {
faluco@739: 		m_RetParam = NULL;
faluco@739: 	}
faluco@739: 
faluco@739: 	m_NumParams = numParams;
faluco@739: 
faluco@739: 	/* Calculate virtual stack offsets for each parameter */
faluco@739: 	size_t offs = 0;
faluco@739: 
faluco@739: 	if (cv == CallConv_ThisCall)
faluco@739: 	{
faluco@739: 		offs += sizeof(void *);
faluco@739: 	}
faluco@739: 	for (size_t i=0; i<numParams; i++)
faluco@739: 	{
faluco@739: 		m_Params[i].offset = offs;
faluco@739: 		offs += m_Params[i].info.size;
faluco@739: 	}
faluco@739: }
faluco@739: 
faluco@739: CallWrapper::~CallWrapper()
faluco@739: {
faluco@739: 	delete [] m_Params;
faluco@739: 	delete m_RetParam;
faluco@739: 	g_SPEngine->ExecFree(m_Addrs[ADDR_CODEBASE]);
faluco@739: }
faluco@739: 
faluco@739: CallConvention CallWrapper::GetCallConvention()
faluco@739: {
faluco@739: 	return m_Cv;
faluco@739: }
faluco@739: 
faluco@739: const PassEncode *CallWrapper::GetParamInfo(unsigned int num)
faluco@739: {
faluco@739: 	return (num+1 > m_NumParams) ? NULL : &m_Params[num];
faluco@739: }
faluco@739: 
faluco@739: const PassInfo *CallWrapper::GetReturnInfo()
faluco@739: {
faluco@739: 	return m_RetParam;
faluco@739: }
faluco@739: 
faluco@739: unsigned int CallWrapper::GetParamCount()
faluco@739: {
faluco@739: 	return m_NumParams;
faluco@739: }
faluco@739: 
faluco@739: void CallWrapper::Execute(void *vParamStack, void *retBuffer)
faluco@739: {
faluco@739: 	typedef void (*CALL_EXECUTE)(void *, void *);
faluco@739: 	CALL_EXECUTE fn = (CALL_EXECUTE)m_Addrs[ADDR_CODEBASE];
faluco@739: 	fn(vParamStack, retBuffer);
faluco@739: }