efee430f3b
* harbour/include/hbstack.h
! fixed typo in function name, should be: hb_stackLocalVariable()
not hb_stacklocalVariable()
+ added hb_stackId()
* hide hb_stack declaration when HB_STACK_MACROS is not set
* harbour/source/vm/dynlibhb.c
* use hb_stackId()
* harbour/source/vm/estack.c
+ added hb_stackId()
! fixed some condition used to check stack access - they were
reporting internal errors for valid code
* harbour/source/vm/hvm.c
! fixed code which executed hb_stackLocalVariable() with pointer
to SHORT not int
228 lines
11 KiB
C
228 lines
11 KiB
C
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* The eval stack
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*
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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/* TOFIX: There are several things in this file which are not part of the
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standard Harbour API, in other words these things are not
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guaranteed to remain unchanged. To avoid confusion these should be
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moved to somewhere else (like HBRTL.H). [vszakats] */
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#ifndef HB_STACK_H_
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#define HB_STACK_H_
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#include "hbvmpub.h"
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HB_EXTERN_BEGIN
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#ifdef _HB_API_INTERNAL_
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/* stack managed by the virtual machine */
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typedef struct
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{
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PHB_ITEM * pItems; /* pointer to the stack items */
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PHB_ITEM * pPos; /* pointer to the latest used item */
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PHB_ITEM * pEnd; /* pointer to the end of stack items */
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LONG wItems; /* total items that may be holded on the stack */
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HB_ITEM Return; /* latest returned value */
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PHB_ITEM * pBase; /* stack frame position for the current function call */
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PHB_ITEM * pEvalBase; /* stack frame position for the evaluated codeblock */
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LONG lStatics; /* statics base for the current function call */
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LONG lWithObject; /* stack offset to base current WITH OBJECT item */
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HB_STACK_STATE state; /* first (default) stack state frame */
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char szDate[ 9 ]; /* last returned date from _pards() yyyymmdd format */
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} HB_STACK;
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#if defined(HB_STACK_MACROS)
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extern HB_STACK hb_stack;
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#endif
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#endif
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extern HB_EXPORT HB_ITEM_PTR hb_stackSelfItem( void ); // returns Self object at C function level
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extern HB_EXPORT HB_ITEM_PTR hb_stackReturnItem( void );// returns RETURN Item from stack
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extern HB_ITEM_PTR hb_stackItemFromTop( int nFromTop );
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extern HB_ITEM_PTR hb_stackItemFromBase( int nFromBase );
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extern HB_ITEM_PTR hb_stackLocalVariable( int *piFromBase );
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extern LONG hb_stackTopOffset( void );
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extern LONG hb_stackBaseOffset( void );
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extern LONG hb_stackTotalItems( void );
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extern HB_ITEM_PTR hb_stackBaseItem( void );
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extern HB_ITEM_PTR hb_stackItem( LONG iItemPos );
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extern char * hb_stackDateBuffer( void );
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extern void hb_stackSetStaticsBase( LONG lBase );
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extern LONG hb_stackGetStaticsBase( void );
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extern PHB_ITEM ** hb_stackItemBasePtr( void );
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extern PHB_ITEM hb_stackWithObjectItem( void );
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extern LONG hb_stackWithObjectOffset( void );
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extern void hb_stackWithObjectSetOffset( LONG );
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extern void * hb_stackId( void );
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extern void hb_stackDec( void ); /* pops an item from the stack without clearing it's contents */
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extern void hb_stackPop( void ); /* pops an item from the stack */
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extern void hb_stackPush( void ); /* pushes an item on to the stack */
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extern HB_ITEM_PTR hb_stackAllocItem( void ); /* allocates new item on the top of stack, returns pointer to it */
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extern void hb_stackPushReturn( void );
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extern void hb_stackPopReturn( void );
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extern void hb_stackRemove( LONG lUntilPos );
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/* stack management functions */
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extern int hb_stackCallDepth( void );
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extern LONG hb_stackBaseProcOffset( int iLevel );
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extern void hb_stackBaseProcInfo( char * szProcName, USHORT * puiProcLine ); /* get current .PRG function name and line number */
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extern void hb_stackDispLocal( void ); /* show the types of the items on the stack for debugging purposes */
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extern void hb_stackDispCall( void );
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extern void hb_stackFree( void ); /* releases all memory used by the stack */
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extern void hb_stackInit( void ); /* initializes the stack */
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extern void hb_stackIncrease( void ); /* increase the stack size */
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#ifdef _HB_API_INTERNAL_
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extern void hb_stackDecrease( ULONG ulItems );
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extern HB_ITEM_PTR hb_stackNewFrame( PHB_STACK_STATE pStack, USHORT uiParams );
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extern void hb_stackOldFrame( PHB_STACK_STATE pStack );
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extern void hb_stackClearMevarsBase( void );
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#endif
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#if defined(HB_STACK_MACROS)
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#define hb_stackItemFromTop( n ) ( * ( hb_stack.pPos + ( int ) (n) ) )
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#define hb_stackItemFromBase( n ) ( * ( hb_stack.pBase + ( int ) (n) + 1 ) )
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#define hb_stackTopOffset( ) ( hb_stack.pPos - hb_stack.pItems )
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#define hb_stackBaseOffset( ) ( hb_stack.pBase - hb_stack.pItems + 1 )
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#define hb_stackTotalItems( ) ( hb_stack.wItems )
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#define hb_stackBaseItem( ) ( * hb_stack.pBase )
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#define hb_stackSelfItem( ) ( * ( hb_stack.pBase + 1 ) )
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#define hb_stackItem( iItemPos ) ( * ( hb_stack.pItems + ( iItemPos ) ) )
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#define hb_stackReturnItem( ) ( &hb_stack.Return )
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#define hb_stackDateBuffer( ) ( hb_stack.szDate )
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#define hb_stackGetStaticsBase( ) ( hb_stack.lStatics )
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#define hb_stackSetStaticsBase( n ) do { hb_stack.lStatics = ( n ); } while ( 0 )
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#define hb_stackItemBasePtr( ) ( &hb_stack.pItems )
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#define hb_stackWithObjectItem( ) ( hb_stack.lWithObject ? * ( hb_stack.pItems + hb_stack.lWithObject ) : NULL )
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#define hb_stackWithObjectOffset( ) ( hb_stack.lWithObject )
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#define hb_stackWithObjectSetOffset( n ) do { hb_stack.lWithObject = ( n ); } while( 0 )
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#define hb_stackId( ) ( ( void * ) &hb_stack )
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#define hb_stackAllocItem( ) ( ( ++hb_stack.pPos == hb_stack.pEnd ? \
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hb_stackIncrease() : (void) 0 ), \
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* ( hb_stack.pPos - 1 ) )
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#ifdef HB_STACK_SAFEMACROS
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#define hb_stackDecrease( n ) do { \
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if( ( hb_stack.pPos -= (n) ) <= hb_stack.pBase ) \
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hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
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} while ( 0 )
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#define hb_stackDec( ) do { \
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if( --hb_stack.pPos <= hb_stack.pBase ) \
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hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
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} while ( 0 )
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#define hb_stackPop( ) do { \
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if( --hb_stack.pPos <= hb_stack.pBase ) \
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hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
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if( HB_IS_COMPLEX( * hb_stack.pPos ) ) \
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hb_itemClear( * hb_stack.pPos ); \
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} while ( 0 )
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#define hb_stackPopReturn( ) do { \
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if( HB_IS_COMPLEX( &hb_stack.Return ) ) \
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hb_itemClear( &hb_stack.Return ); \
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if( --hb_stack.pPos <= hb_stack.pBase ) \
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hb_errInternal( HB_EI_STACKUFLOW, NULL, NULL, NULL ); \
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hb_itemRawMove( &hb_stack.Return, * hb_stack.pPos ); \
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} while ( 0 )
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#else
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#define hb_stackDecrease( n ) do { hb_stack.pPos -= (n); } while ( 0 )
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#define hb_stackDec( ) do { --hb_stack.pPos; } while ( 0 )
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#define hb_stackPop( ) do { --hb_stack.pPos; \
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if( HB_IS_COMPLEX( * hb_stack.pPos ) ) \
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hb_itemClear( * hb_stack.pPos ); \
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} while ( 0 )
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#define hb_stackPopReturn( ) do { \
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if( HB_IS_COMPLEX( &hb_stack.Return ) ) \
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hb_itemClear( &hb_stack.Return ); \
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--hb_stack.pPos; \
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hb_itemRawMove( &hb_stack.Return, * hb_stack.pPos ); \
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} while ( 0 )
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#endif
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#define hb_stackPush( ) do { \
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if( ++hb_stack.pPos == hb_stack.pEnd ) \
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hb_stackIncrease(); \
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} while ( 0 )
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#define hb_stackPushReturn( ) do { \
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hb_itemRawMove( * hb_stack.pPos, &hb_stack.Return ); \
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if( ++hb_stack.pPos == hb_stack.pEnd ) \
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hb_stackIncrease(); \
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} while ( 0 )
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#define hb_stackLocalVariable( p ) ( ( ( ( *hb_stack.pBase )->item.asSymbol.paramcnt > \
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( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) && \
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( * (p) ) > ( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) ? \
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( * ( hb_stack.pBase + ( int ) ( * (p) += \
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( * hb_stack.pBase )->item.asSymbol.paramcnt - \
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( * hb_stack.pBase )->item.asSymbol.paramdeclcnt ) + 1 ) ) : \
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( * ( hb_stack.pBase + ( int ) ( * (p) ) + 1 ) ) )
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#endif
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HB_EXTERN_END
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#endif /* HB_STACK_H_ */
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