/**

 * vim: set ts=4 :

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

 * SourceMod

 * Copyright (C) 2004-2009 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: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_NATIVE_INVOKER_H_

#define _INCLUDE_SOURCEMOD_NATIVE_INVOKER_H_

#include <sp_vm_api.h>

#include <INativeInvoker.h>

#include "common_logic.h"

using namespace SourceMod;

using namespace SourcePawn;

struct ParamInfo

{

	int flags;			/* Copy-back flags */

	bool marked;		/* Whether this is marked as being used */

	cell_t local_addr;	/* Local address to free */

	cell_t *phys_addr;	/* Physical address of our copy */

	cell_t *orig_addr;	/* Original address to copy back to */

	ucell_t size;		/* Size of array in bytes */

	struct

	{

		bool is_sz;		/* is a string */

		int sz_flags;	/* has sz flags */

	} str;

};

class NativeInvoker : public INativeInvoker

{

public:

	NativeInvoker();

	~NativeInvoker();

public: /* ICallable */

	int PushCell(cell_t cell);

	int PushCellByRef(cell_t *cell, int flags=SM_PARAM_COPYBACK);

	int PushFloat(float number);

	int PushFloatByRef(float *number, int flags=SM_PARAM_COPYBACK);

	int PushArray(cell_t *inarray, unsigned int cells, int flags=0);

	int PushString(const char *string);

	int PushStringEx(char *buffer, size_t length, int sz_flags, int cp_flags);

	void Cancel();

public: /* INativeInvoker */

	bool Start(IPluginContext *pContext, const char *name);

	int Invoke(cell_t *result);

private:

	int _PushString(const char *string, int sz_flags, int cp_flags, size_t len);

	int SetError(int err);

private:

	IPluginContext *context_;

	SPVM_NATIVE_FUNC native_;

	cell_t m_params[SP_MAX_EXEC_PARAMS];

	ParamInfo m_info[SP_MAX_EXEC_PARAMS];

	unsigned int m_curparam;

	int m_errorstate;

};

class NativeInterface : 

	public INativeInterface,

	public SMGlobalClass

{

public: /* SMGlobalClass */

	void OnSourceModAllInitialized();

public: /* SMInterface */

	unsigned int GetInterfaceVersion();

	const char *GetInterfaceName();

public: /* INativeInvoker */

	IPluginRuntime *CreateRuntime(const char *name, size_t bytes);

	INativeInvoker *CreateInvoker();

};

extern NativeInterface g_NInvoke;

#endif /* _INCLUDE_SOURCEMOD_NATIVE_INVOKER_H_ */