/**

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

 * SourcePawn (C)2004-2007 AlliedModders LLC.  All rights reserved.

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

 *

 * This file is not open source and may not be copied without explicit

 * written permission of AlliedModders LLC.  This file may not be redistributed 

 * in whole or significant part.

 * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_BASEFUNCTION_H_

#define _INCLUDE_SOURCEMOD_BASEFUNCTION_H_

#include "sm_globals.h"

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 */

};

class CPlugin;

class CFunction : public IPluginFunction

{

	friend class SourcePawnEngine;

public:

	CFunction(uint32_t code_addr, IPluginContext *pContext);

public:

	virtual int PushCell(cell_t cell);

	virtual int PushCellByRef(cell_t *cell, int flags);

	virtual int PushFloat(float number);

	virtual int PushFloatByRef(float *number, int flags);

	virtual int PushArray(cell_t *inarray, unsigned int cells, cell_t **phys_addr, int copyback);

	virtual int PushString(const char *string);

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

	virtual cell_t *GetAddressOfPushedParam(unsigned int param);

	virtual int Execute(cell_t *result);

	virtual void Cancel();

	virtual int CallFunction(const cell_t *params, unsigned int num_params, cell_t *result);

	virtual IPluginContext *GetParentContext();

	inline bool IsInvalidated()

	{

		return m_Invalid;

	}

	inline void Invalidate()

	{

		m_Invalid = true;

	}

public:

	void Set(uint32_t code_addr, IPluginContext *plugin);

private:

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

	inline int SetError(int err)

	{

		m_errorstate = err;

		return err;

	}

private:

	uint32_t m_codeaddr;

	IPluginContext *m_pContext;

	cell_t m_params[SP_MAX_EXEC_PARAMS];

	ParamInfo m_info[SP_MAX_EXEC_PARAMS];

	unsigned int m_curparam;

	int m_errorstate;

	CFunction *m_pNext;

	bool m_Invalid;

};

#endif //_INCLUDE_SOURCEMOD_BASEFUNCTION_H_