static void DestroyDefglobal(
Environment *theEnv,
Defglobal *theDefglobal)
{
if (theDefglobal == NULL) return;
/*====================================*/
/* Return the global's current value. */
/*====================================*/
if (theDefglobal->current.header->type == MULTIFIELD_TYPE)
{
if (theDefglobal->current.multifieldValue->busyCount == 0)
{ ReturnMultifield(theEnv,theDefglobal->current.multifieldValue); }
else
{ AddToMultifieldList(theEnv,theDefglobal->current.multifieldValue); }
}
#if (! RUN_TIME)
/*===============================*/
/* Release items stored in the */
/* defglobal's construct header. */
/*===============================*/
DeinstallConstructHeader(theEnv,&theDefglobal->header);
/*======================================*/
/* Return the defglobal data structure. */
/*======================================*/
rtn_struct(theEnv,defglobal,theDefglobal);
#endif
}
static void ReturnDefglobal(
Environment *theEnv,
Defglobal *theDefglobal)
{
#if (! BLOAD_ONLY) && (! RUN_TIME)
if (theDefglobal == NULL) return;
/*====================================*/
/* Return the global's current value. */
/*====================================*/
Release(theEnv,theDefglobal->current.header);
if (theDefglobal->current.header->type == MULTIFIELD_TYPE)
{
if (theDefglobal->current.multifieldValue->busyCount == 0)
{ ReturnMultifield(theEnv,theDefglobal->current.multifieldValue); }
else
{ AddToMultifieldList(theEnv,theDefglobal->current.multifieldValue); }
}
/*================================================*/
/* Return the expression representing the initial */
/* value of the defglobal when it was defined. */
/*================================================*/
RemoveHashedExpression(theEnv,theDefglobal->initial);
/*===============================*/
/* Release items stored in the */
/* defglobal's construct header. */
/*===============================*/
DeinstallConstructHeader(theEnv,&theDefglobal->header);
/*======================================*/
/* Return the defglobal data structure. */
/*======================================*/
rtn_struct(theEnv,defglobal,theDefglobal);
/*===========================================*/
/* Set the variable indicating that a change */
/* has been made to a global variable. */
/*===========================================*/
DefglobalData(theEnv)->ChangeToGlobals = true;
#endif
}
globle void CopyDataObject(
DATA_OBJECT *dst,
DATA_OBJECT *src,
int garbageMultifield)
{
if (src->type != MULTIFIELD)
{
dst->type = src->type;
dst->value = src->value;
}
else
{
DuplicateMultifield(dst,src);
if (garbageMultifield)
{ AddToMultifieldList((struct multifield *) dst->value); }
}
}
void QSetDefglobalValue(
Environment *theEnv,
Defglobal *theGlobal,
UDFValue *vPtr,
bool resetVar)
{
CLIPSValue newValue;
/*====================================================*/
/* If the new value passed for the defglobal is NULL, */
/* then reset the defglobal to the initial value it */
/* had when it was defined. */
/*====================================================*/
if (resetVar)
{
EvaluateExpression(theEnv,theGlobal->initial,vPtr);
if (EvaluationData(theEnv)->EvaluationError)
{ vPtr->value = FalseSymbol(theEnv); }
}
/*==========================================*/
/* If globals are being watch, then display */
/* the change to the global variable. */
/*==========================================*/
#if DEBUGGING_FUNCTIONS
if (theGlobal->watch &&
(! ConstructData(theEnv)->ClearReadyInProgress) &&
(! ConstructData(theEnv)->ClearInProgress))
{
WriteString(theEnv,STDOUT,":== ?*");
WriteString(theEnv,STDOUT,theGlobal->header.name->contents);
WriteString(theEnv,STDOUT,"* ==> ");
WriteUDFValue(theEnv,STDOUT,vPtr);
WriteString(theEnv,STDOUT," <== ");
WriteCLIPSValue(theEnv,STDOUT,&theGlobal->current);
WriteString(theEnv,STDOUT,"\n");
}
#endif
/*==============================================*/
/* Retain the new value of the global variable. */
/*==============================================*/
NormalizeMultifield(theEnv,vPtr);
if (vPtr->header->type != MULTIFIELD_TYPE)
{ newValue.value = vPtr->value; }
else
{ newValue.value = CopyMultifield(theEnv,vPtr->multifieldValue); }
Retain(theEnv,newValue.header);
/*==============================================*/
/* Remove the old value of the global variable. */
/*==============================================*/
Release(theEnv,theGlobal->current.header);
if (theGlobal->current.header->type == MULTIFIELD_TYPE)
{
if (theGlobal->current.multifieldValue->busyCount == 0)
{ ReturnMultifield(theEnv,theGlobal->current.multifieldValue); }
else
{ AddToMultifieldList(theEnv,theGlobal->current.multifieldValue); }
}
/*===========================================*/
/* Set the new value of the global variable. */
/*===========================================*/
theGlobal->current.value = newValue.value;
/*===========================================*/
/* Set the variable indicating that a change */
/* has been made to a global variable. */
/*===========================================*/
DefglobalData(theEnv)->ChangeToGlobals = true;
if (EvaluationData(theEnv)->CurrentExpression == NULL)
{
CleanCurrentGarbageFrame(theEnv,NULL);
CallPeriodicTasks(theEnv);
}
}