/*
* This function releases PRIVATE variables created after passed base
*/
void hb_memvarSetPrivatesBase( HB_SIZE nBase )
{
HB_STACK_TLS_PRELOAD
PHB_PRIVATE_STACK pPrivateStack;
HB_TRACE( HB_TR_DEBUG, ( "hb_memvarSetPrivatesBase(%" HB_PFS "u)", nBase ) );
pPrivateStack = hb_stackGetPrivateStack();
while( pPrivateStack->count > pPrivateStack->base )
{
PHB_DYNS pDynSym = pPrivateStack->stack[ --pPrivateStack->count ].pDynSym;
if( hb_dynsymGetMemvar( pDynSym ) )
{
/* Restore previous value for variables that were overridden
*/
hb_memvarDetachDynSym( pDynSym, pPrivateStack->stack[ pPrivateStack->count ].pPrevMemvar );
}
}
pPrivateStack->base = nBase;
}
/* Checks if passed dynamic symbol is a variable and returns its scope
*/
static int hb_memvarScopeGet( PHB_DYNS pDynVar )
{
HB_TRACE( HB_TR_DEBUG, ( "hb_memvarScopeGet(%p)", pDynVar ) );
if( hb_dynsymGetMemvar( pDynVar ) == 0 )
return HB_MV_UNKNOWN;
else
{
HB_STACK_TLS_PRELOAD
HB_SIZE nBase = hb_stackGetPrivateStack()->count; /* start from the top of the stack */
while( nBase )
{
if( pDynVar == hb_stackGetPrivateStack()->stack[ --nBase ].pDynSym )
{
if( nBase >= hb_stackGetPrivateStack()->base )
return HB_MV_PRIVATE_LOCAL;
else
return HB_MV_PRIVATE_GLOBAL;
}
}
return HB_MV_PUBLIC;
}
}
void hb_memvarGetRefer( PHB_ITEM pItem, PHB_SYMB pMemvarSymb )
{
PHB_DYNS pDyn;
HB_TRACE( HB_TR_DEBUG, ( "hb_memvarGetRefer(%p, %p)", pItem, pMemvarSymb ) );
pDyn = ( PHB_DYNS ) pMemvarSymb->pDynSym;
if( pDyn )
{
PHB_ITEM pMemvar;
pMemvar = hb_dynsymGetMemvar( pDyn );
HB_TRACE( HB_TR_INFO, ( "Memvar item (%p)(%s) referenced", pMemvar, pMemvarSymb->szName ) );
if( pMemvar )
{
if( HB_IS_BYREF( pMemvar ) && ! HB_IS_ENUM( pMemvar ) )
hb_itemCopy( pItem, pMemvar );
else
{
/* value is already created */
pItem->type = HB_IT_BYREF | HB_IT_MEMVAR;
pItem->item.asMemvar.value = pMemvar;
hb_xRefInc( pMemvar );
}
}
else
{
/* Generate an error with retry possibility
* (user created error handler can make this variable accessible)
*/
PHB_ITEM pError;
pError = hb_errRT_New( ES_ERROR, NULL, EG_NOVAR, 1003,
NULL, pMemvarSymb->szName, 0, EF_CANRETRY );
hb_itemClear( pItem );
while( hb_errLaunch( pError ) == E_RETRY )
{
pMemvar = hb_dynsymGetMemvar( pDyn );
if( pMemvar )
{
if( HB_IS_BYREF( pMemvar ) && ! HB_IS_ENUM( pMemvar ) )
hb_itemCopy( pItem, pMemvar );
else
{
/* value is already created */
pItem->type = HB_IT_BYREF | HB_IT_MEMVAR;
pItem->item.asMemvar.value = pMemvar;
hb_xRefInc( pMemvar );
}
break;
}
}
hb_errRelease( pError );
}
}
else
hb_errInternal( HB_EI_MVBADSYMBOL, NULL, pMemvarSymb->szName, NULL );
}
/*
* This function pushes passed dynamic symbol that belongs to PRIVATE variable
* into the stack. The value will be popped from it if the variable falls
* outside the scope (either by using RELEASE, CLEAR ALL, CLEAR MEMORY or by
* an exit from the function/procedure)
*
*/
static void hb_memvarAddPrivate( PHB_DYNS pDynSym, PHB_ITEM pValue )
{
HB_STACK_TLS_PRELOAD
PHB_PRIVATE_STACK pPrivateStack;
PHB_ITEM pMemvar;
HB_TRACE( HB_TR_DEBUG, ( "hb_memvarAddPrivate(%p,%p)", pDynSym, pValue ) );
pPrivateStack = hb_stackGetPrivateStack();
pMemvar = hb_dynsymGetMemvar( pDynSym );
/* If the variable with the same name exists already
* and it's PRIVATE variable declared in this function then
* do not push new memvar on PRIVATEs stack
*/
if( pMemvar )
{
HB_SIZE nCount = pPrivateStack->count;
while( nCount > pPrivateStack->base )
{
if( pDynSym == pPrivateStack->stack[ nCount - 1 ].pDynSym )
break;
--nCount;
}
if( nCount <= pPrivateStack->base )
pMemvar = NULL;
}
if( ! pMemvar )
{
/* Allocate the value from the end of table
*/
if( pPrivateStack->count == pPrivateStack->size )
{
/* No more free values in the table - expand the table
*/
if( pPrivateStack->size == 0 )
{
pPrivateStack->stack = ( PHB_PRIVATE_ITEM )
hb_xgrab( sizeof( HB_PRIVATE_ITEM ) * TABLE_INITHB_VALUE );
pPrivateStack->size = TABLE_INITHB_VALUE;
pPrivateStack->count = pPrivateStack->base = 0;
}
else
{
pPrivateStack->size += TABLE_EXPANDHB_VALUE;
pPrivateStack->stack = ( PHB_PRIVATE_ITEM )
hb_xrealloc( pPrivateStack->stack,
sizeof( HB_PRIVATE_ITEM ) * pPrivateStack->size );
}
}
pPrivateStack->stack[ pPrivateStack->count ].pDynSym = pDynSym;
pPrivateStack->stack[ pPrivateStack->count++ ].pPrevMemvar = hb_dynsymGetMemvar( pDynSym );
if( pValue && HB_IS_MEMVAR( pValue ) )
{
pMemvar = pValue->item.asMemvar.value;
hb_xRefInc( pMemvar );
pValue = NULL;
}
else
pMemvar = hb_memvarValueNew();
hb_dynsymSetMemvar( pDynSym, pMemvar );
}
if( pValue )
{
hb_itemCopy( pMemvar, pValue );
/* Remove MEMOFLAG if exists (assignment from field). */
pMemvar->type &= ~HB_IT_MEMOFLAG;
}
}