/*****************************************************************************
 * Copyright (C) 2004-2005
 * ProbeStar Telematics, LLC
 * All Rights Reserved.  Proprietary and Confidential.
 *============================================================================
 * BYTE Stack
*****************************************************************************/

/* prevent multiple inclusions */
#ifndef __EMBEDDED_BYTESTACK__
#define __EMBEDDED_BYTESTACK__

/*****************************************************************************
 * includes
*****************************************************************************/

#include "embtypes.h"

/*****************************************************************************
 * defines
*****************************************************************************/

/*****************************************************************************
 * macros
*****************************************************************************/

#define _StackPush(S,D) \
	if ( (S).byCount < (S).bySize ) \
		*((S).pbyBuf+((S).byCount++)) = (D);

#define _StackPop(S) 	((S).byCount ? *((S).pbyBuf+(--(S).byCount)) : 0)

#define	_StackAlloc(S,B,N)	(S).pbyBuf=(B);(S).bySize=(N)
#define _StackClear(S)		(S).byCount=0
#define _StackCount(S)		(S).byCount
#define _StackSize(S)		(S).bySize
#define _StackEmpty(S)		((S).byCount==0)
#define _StackFull(S)		((S).byCount>=(S).bySize)
		
#define StackClear(S)		(S)->byCount=0
#define	StackCount(S)		(S)->byCount
#define StackSize(S)		(S)->bySize
#define StackEmpty(S)		((S)->byCount==0)
#define	StackFull(S)		((S)->byCount>=(S)->bySize)

/*****************************************************************************
 * structs & typedefs
*****************************************************************************/

typedef struct _Stack {
  BYTE byCount;
  BYTE bySize;
  BYTE *pbyBuf;
} Stack;

/*****************************************************************************
 * global constants
*****************************************************************************/

/*****************************************************************************
 * global variables
*****************************************************************************/

/*****************************************************************************
 * C function prototypes
*****************************************************************************/
/* export C functions to C++ */
#ifdef __cplusplus
extern "C" {
#endif

void StackAlloc( Stack *pS, BYTE *pbyBuf, BYTE bySize );

BYTE StackPush( Stack *pS, BYTE *pbyData );
BYTE StackPop( Stack *pS, BYTE *pbyData );

#ifdef __cpluscplus
}
#endif

#endif