113 lines
4.3 KiB
C
113 lines
4.3 KiB
C
/*
|
|
* $Id$
|
|
*/
|
|
|
|
/*
|
|
* Harbour Project source code:
|
|
* The eval stack
|
|
*
|
|
* Copyright 1999 Antonio Linares <alinares@fivetech.com>
|
|
* www - http://www.harbour-project.org
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version, with one exception:
|
|
*
|
|
* The exception is that if you link the Harbour Runtime Library (HRL)
|
|
* and/or the Harbour Virtual Machine (HVM) with other files to produce
|
|
* an executable, this does not by itself cause the resulting executable
|
|
* to be covered by the GNU General Public License. Your use of that
|
|
* executable is in no way restricted on account of linking the HRL
|
|
* and/or HVM code into it.
|
|
*
|
|
* 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, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
|
|
* their web site at http://www.gnu.org/).
|
|
*
|
|
*/
|
|
|
|
/* TOFIX: There are several things in this file which are not part of the
|
|
standard Harbour API, in other words these things are not
|
|
guaranteed to remain unchanged. To avoid confusion these should be
|
|
moved to somewhere else (like HBRTL.H). [vszakats] */
|
|
|
|
#ifndef HB_STACK_H_
|
|
#define HB_STACK_H_
|
|
|
|
#include "hbvmpub.h"
|
|
|
|
#if defined(HB_EXTERN_C)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* stack managed by the virtual machine */
|
|
typedef struct
|
|
{
|
|
PHB_ITEM * pItems; /* pointer to the stack items */
|
|
PHB_ITEM * pPos; /* pointer to the latest used item */
|
|
LONG wItems; /* total items that may be holded on the stack */
|
|
HB_ITEM Return; /* latest returned value */
|
|
PHB_ITEM * pBase; /* stack frame position for the current function call */
|
|
PHB_ITEM * pEvalBase; /* stack frame position for the evaluated codeblock */
|
|
int iStatics; /* statics base for the current function call */
|
|
char szDate[ 9 ]; /* last returned date from _pards() yyyymmdd format */
|
|
} HB_STACK;
|
|
|
|
extern HB_STACK hb_stack;
|
|
|
|
typedef struct
|
|
{
|
|
LONG lBaseItem;
|
|
LONG iStatics;
|
|
} HB_STACK_STATE; /* used to save/restore stack state in hb_vmDo)_ */
|
|
|
|
#if defined(HB_STACK_MACROS)
|
|
|
|
#define hb_stackItemFromTop( n ) ( * ( hb_stack->pPos + (n) ) )
|
|
#define hb_stackItemFromBase( n ) ( * ( hb_stack->pBase + (n) + 1 ) )
|
|
#define hb_stackTopOffset( ) ( hb_stack.pPos - hb_stack.pItems )
|
|
#define hb_stackBaseOffset( ) ( hb_stack.pBase - hb_stack.pItems + )
|
|
#define hb_stackTopItem( ) ( * hb_stack.pPos )
|
|
#define hb_stackBaseItem( ) ( * hb_stack.pBase )
|
|
#define hb_stackSelfItem( ) ( * ( hb_stack.pBase + 1 ) )
|
|
#define hb_stackItem( iItemPos ) ( * ( hb_stack.pItems + iItemPos ) )
|
|
|
|
#else
|
|
|
|
extern HB_ITEM_PTR hb_stackItemFromTop( int nFromTop );
|
|
extern HB_ITEM_PTR hb_stackItemFromBase( int nFromBase );
|
|
extern LONG hb_stackTopOffset( void );
|
|
extern LONG hb_stackBaseOffset( void );
|
|
extern HB_ITEM_PTR hb_stackTopItem( void );
|
|
extern HB_ITEM_PTR hb_stackBaseItem( void );
|
|
extern HB_ITEM_PTR hb_stackSelfItem( void );
|
|
extern HB_ITEM_PTR hb_stackItem( LONG iItemPos );
|
|
|
|
#endif
|
|
|
|
extern void hb_stackRemove( LONG lUntilPos );
|
|
extern HB_ITEM_PTR hb_stackNewFrame( HB_STACK_STATE * pStack, USHORT uiParams );
|
|
extern void hb_stackOldFrame( HB_STACK_STATE * pStack );
|
|
|
|
/* stack management functions */
|
|
extern void hb_stackDispLocal( void ); /* show the types of the items on the stack for debugging purposes */
|
|
extern void hb_stackDispCall( void );
|
|
extern void hb_stackDec( void ); /* pops an item from the stack without clearing it's contents */
|
|
extern void hb_stackFree( void ); /* releases all memory used by the stack */
|
|
extern void hb_stackPush( void ); /* pushes an item on to the stack */
|
|
extern void hb_stackPop( void ); /* pops an item from the stack */
|
|
extern void hb_stackInit( void ); /* initializes the stack */
|
|
|
|
#if defined(HB_EXTERN_C)
|
|
}
|
|
#endif
|
|
|
|
#endif /* HB_STACK_H_ */
|