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); }
}
}
globle void QSetDefglobalValue(
void *theEnv,
struct defglobal *theGlobal,
DATA_OBJECT_PTR vPtr,
int resetVar)
{
/*====================================================*/
/* 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->type = SYMBOL;
vPtr->value = EnvFalseSymbol(theEnv);
}
}
/*==========================================*/
/* If globals are being watch, then display */
/* the change to the global variable. */
/*==========================================*/
#if DEBUGGING_FUNCTIONS
if (theGlobal->watch)
{
EnvPrintRouter(theEnv,WTRACE,":== ?*");
EnvPrintRouter(theEnv,WTRACE,ValueToString(theGlobal->header.name));
EnvPrintRouter(theEnv,WTRACE,"* ==> ");
PrintDataObject(theEnv,WTRACE,vPtr);
EnvPrintRouter(theEnv,WTRACE," <== ");
PrintDataObject(theEnv,WTRACE,&theGlobal->current);
EnvPrintRouter(theEnv,WTRACE,"\n");
}
#endif
/*==============================================*/
/* Remove the old value of the global variable. */
/*==============================================*/
ValueDeinstall(theEnv,&theGlobal->current);
if (theGlobal->current.type == MULTIFIELD)
{ ReturnMultifield(theEnv,(struct multifield *) theGlobal->current.value); }
/*===========================================*/
/* Set the new value of the global variable. */
/*===========================================*/
theGlobal->current.type = vPtr->type;
if (vPtr->type != MULTIFIELD) theGlobal->current.value = vPtr->value;
else DuplicateMultifield(theEnv,&theGlobal->current,vPtr);
ValueInstall(theEnv,&theGlobal->current);
/*===========================================*/
/* Set the variable indicating that a change */
/* has been made to a global variable. */
/*===========================================*/
DefglobalData(theEnv)->ChangeToGlobals = TRUE;
if ((EvaluationData(theEnv)->CurrentEvaluationDepth == 0) && (! CommandLineData(theEnv)->EvaluatingTopLevelCommand) &&
(EvaluationData(theEnv)->CurrentExpression == NULL))
{ PeriodicCleanup(theEnv,TRUE,FALSE); }
}
static void AddDefglobal(
void *theEnv,
SYMBOL_HN *name,
DATA_OBJECT_PTR vPtr,
struct expr *ePtr)
{
struct defglobal *defglobalPtr;
intBool newGlobal = FALSE;
#if DEBUGGING_FUNCTIONS
int GlobalHadWatch = FALSE;
#endif
/*========================================================*/
/* If the defglobal is already defined, then use the old */
/* data structure and substitute new values. If it hasn't */
/* been defined, then create a new data structure. */
/*========================================================*/
defglobalPtr = QFindDefglobal(theEnv,name);
if (defglobalPtr == NULL)
{
newGlobal = TRUE;
defglobalPtr = get_struct(theEnv,defglobal);
}
else
{
DeinstallConstructHeader(theEnv,&defglobalPtr->header);
#if DEBUGGING_FUNCTIONS
GlobalHadWatch = defglobalPtr->watch;
#endif
}
/*===========================================*/
/* Remove the old values from the defglobal. */
/*===========================================*/
if (newGlobal == FALSE)
{
ValueDeinstall(theEnv,&defglobalPtr->current);
if (defglobalPtr->current.type == MULTIFIELD)
{ ReturnMultifield(theEnv,(struct multifield *) defglobalPtr->current.value); }
RemoveHashedExpression(theEnv,defglobalPtr->initial);
}
/*=======================================*/
/* Copy the new values to the defglobal. */
/*=======================================*/
defglobalPtr->current.type = vPtr->type;
if (vPtr->type != MULTIFIELD) defglobalPtr->current.value = vPtr->value;
else DuplicateMultifield(theEnv,&defglobalPtr->current,vPtr);
ValueInstall(theEnv,&defglobalPtr->current);
defglobalPtr->initial = AddHashedExpression(theEnv,ePtr);
ReturnExpression(theEnv,ePtr);
DefglobalData(theEnv)->ChangeToGlobals = TRUE;
/*=================================*/
/* Restore the old watch value to */
/* the defglobal if redefined. */
/*=================================*/
#if DEBUGGING_FUNCTIONS
defglobalPtr->watch = GlobalHadWatch ? TRUE : WatchGlobals;
#endif
/*======================================*/
/* Save the name and pretty print form. */
/*======================================*/
defglobalPtr->header.name = name;
defglobalPtr->header.usrData = NULL;
IncrementSymbolCount(name);
SavePPBuffer(theEnv,"\n");
if (EnvGetConserveMemory(theEnv) == TRUE)
{ defglobalPtr->header.ppForm = NULL; }
else
{ defglobalPtr->header.ppForm = CopyPPBuffer(theEnv); }
defglobalPtr->inScope = TRUE;
/*=============================================*/
/* If the defglobal was redefined, we're done. */
/*=============================================*/
if (newGlobal == FALSE) return;
/*===================================*/
/* Copy the defglobal variable name. */
/*===================================*/
defglobalPtr->busyCount = 0;
defglobalPtr->header.whichModule = (struct defmoduleItemHeader *)
GetModuleItem(theEnv,NULL,FindModuleItem(theEnv,"defglobal")->moduleIndex);
/*=============================================*/
/* Add the defglobal to the list of defglobals */
/* for the current module. */
/*=============================================*/
AddConstructToModule(&defglobalPtr->header);
}
