globle BOOLEAN CopyFactSlotValues(
void *vTheDestFact,
void *vTheSourceFact)
{
struct fact *theDestFact = (struct fact *) vTheDestFact;
struct fact *theSourceFact = (struct fact *) vTheSourceFact;
struct deftemplate *theDeftemplate;
struct templateSlot *slotPtr;
int i;
/*===================================*/
/* Both facts must be the same type. */
/*===================================*/
theDeftemplate = theSourceFact->whichDeftemplate;
if (theDestFact->whichDeftemplate != theDeftemplate)
{ return(FALSE); }
/*===================================================*/
/* Loop through each slot of the deftemplate copying */
/* the source fact value to the destination fact. */
/*===================================================*/
for (i = 0, slotPtr = theDeftemplate->slotList;
i < (int) theDeftemplate->numberOfSlots;
i++, slotPtr = slotPtr->next)
{
theDestFact->theProposition.theFields[i].type =
theSourceFact->theProposition.theFields[i].type;
if (theSourceFact->theProposition.theFields[i].type != MULTIFIELD)
{
theDestFact->theProposition.theFields[i].value =
theSourceFact->theProposition.theFields[i].value;
}
else
{
theDestFact->theProposition.theFields[i].value =
CopyMultifield((struct multifield *) theSourceFact->theProposition.theFields[i].value);
}
}
/*========================================*/
/* Return TRUE to indicate that fact slot */
/* values were successfully copied. */
/*========================================*/
return(TRUE);
}
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);
}
}
static void DuplicateModifyCommand(
void *theEnv,
int retractIt,
DATA_OBJECT_PTR returnValue)
{
long int factNum;
struct fact *oldFact, *newFact, *theFact;
struct expr *testPtr;
DATA_OBJECT computeResult;
struct deftemplate *templatePtr;
struct templateSlot *slotPtr;
int i, position, found;
/*===================================================*/
/* Set the default return value to the symbol FALSE. */
/*===================================================*/
SetpType(returnValue,SYMBOL);
SetpValue(returnValue,SymbolData(theEnv)->FalseSymbol);
/*==================================================*/
/* Evaluate the first argument which is used to get */
/* a pointer to the fact to be modified/duplicated. */
/*==================================================*/
testPtr = GetFirstArgument();
EvaluateExpression(theEnv,testPtr,&computeResult);
/*==============================================================*/
/* If an integer is supplied, then treat it as a fact-index and */
/* search the fact-list for the fact with that fact-index. */
/*==============================================================*/
if (computeResult.type == INTEGER)
{
factNum = ValueToLong(computeResult.value);
if (factNum < 0)
{
if (retractIt) ExpectedTypeError2(theEnv,"modify",1);
else ExpectedTypeError2(theEnv,"duplicate",1);
SetEvaluationError(theEnv,TRUE);
return;
}
oldFact = (struct fact *) EnvGetNextFact(theEnv,NULL);
while (oldFact != NULL)
{
if (oldFact->factIndex == factNum)
{ break; }
else
{ oldFact = oldFact->nextFact; }
}
if (oldFact == NULL)
{
char tempBuffer[20];
sprintf(tempBuffer,"f-%ld",factNum);
CantFindItemErrorMessage(theEnv,"fact",tempBuffer);
return;
}
}
/*==========================================*/
/* Otherwise, if a pointer is supplied then */
/* no lookup is required. */
/*==========================================*/
else if (computeResult.type == FACT_ADDRESS)
{ oldFact = (struct fact *) computeResult.value; }
/*===========================================*/
/* Otherwise, the first argument is invalid. */
/*===========================================*/
else
{
if (retractIt) ExpectedTypeError2(theEnv,"modify",1);
else ExpectedTypeError2(theEnv,"duplicate",1);
SetEvaluationError(theEnv,TRUE);
return;
}
/*==================================*/
/* See if it is a deftemplate fact. */
/*==================================*/
templatePtr = oldFact->whichDeftemplate;
if (templatePtr->implied) return;
/*================================================================*/
/* Duplicate the values from the old fact (skipping multifields). */
/*================================================================*/
newFact = (struct fact *) CreateFactBySize(theEnv,oldFact->theProposition.multifieldLength);
newFact->whichDeftemplate = templatePtr;
for (i = 0; i < (int) oldFact->theProposition.multifieldLength; i++)
{
newFact->theProposition.theFields[i].type = oldFact->theProposition.theFields[i].type;
if (newFact->theProposition.theFields[i].type != MULTIFIELD)
{ newFact->theProposition.theFields[i].value = oldFact->theProposition.theFields[i].value; }
else
{ newFact->theProposition.theFields[i].value = NULL; }
}
/*========================*/
/* Start replacing slots. */
/*========================*/
testPtr = testPtr->nextArg;
while (testPtr != NULL)
{
/*============================================================*/
/* If the slot identifier is an integer, then the slot was */
/* previously identified and its position within the template */
/* was stored. Otherwise, the position of the slot within the */
/* deftemplate has to be determined by comparing the name of */
/* the slot against the list of slots for the deftemplate. */
/*============================================================*/
if (testPtr->type == INTEGER)
{ position = (int) ValueToLong(testPtr->value); }
else
{
found = FALSE;
position = 0;
slotPtr = templatePtr->slotList;
while (slotPtr != NULL)
{
if (slotPtr->slotName == (SYMBOL_HN *) testPtr->value)
{
found = TRUE;
slotPtr = NULL;
}
else
{
slotPtr = slotPtr->next;
position++;
}
}
if (! found)
{
InvalidDeftemplateSlotMessage(theEnv,ValueToString(testPtr->value),
ValueToString(templatePtr->header.name));
SetEvaluationError(theEnv,TRUE);
ReturnFact(theEnv,newFact);
return;
}
}
/*===================================================*/
/* If a single field slot is being replaced, then... */
/*===================================================*/
if (newFact->theProposition.theFields[position].type != MULTIFIELD)
{
/*======================================================*/
/* If the list of values to store in the slot is empty */
/* or contains more than one member than an error has */
/* occured because a single field slot can only contain */
/* a single value. */
/*======================================================*/
if ((testPtr->argList == NULL) ? TRUE : (testPtr->argList->nextArg != NULL))
{
MultiIntoSingleFieldSlotError(theEnv,GetNthSlot(templatePtr,position),templatePtr);
ReturnFact(theEnv,newFact);
return;
}
/*===================================================*/
/* Evaluate the expression to be stored in the slot. */
/*===================================================*/
EvaluateExpression(theEnv,testPtr->argList,&computeResult);
SetEvaluationError(theEnv,FALSE);
/*====================================================*/
/* If the expression evaluated to a multifield value, */
/* then an error occured since a multifield value can */
/* not be stored in a single field slot. */
/*====================================================*/
if (computeResult.type == MULTIFIELD)
{
ReturnFact(theEnv,newFact);
MultiIntoSingleFieldSlotError(theEnv,GetNthSlot(templatePtr,position),templatePtr);
return;
}
/*=============================*/
/* Store the value in the slot */
/*=============================*/
newFact->theProposition.theFields[position].type =
computeResult.type;
newFact->theProposition.theFields[position].value =
computeResult.value;
}
/*=================================*/
/* Else replace a multifield slot. */
/*=================================*/
else
{
/*======================================*/
/* Determine the new value of the slot. */
/*======================================*/
StoreInMultifield(theEnv,&computeResult,testPtr->argList,FALSE);
SetEvaluationError(theEnv,FALSE);
/*=============================*/
/* Store the value in the slot */
/*=============================*/
newFact->theProposition.theFields[position].type =
computeResult.type;
newFact->theProposition.theFields[position].value =
computeResult.value;
}
testPtr = testPtr->nextArg;
}
/*=====================================*/
/* Copy the multifield values from the */
/* old fact that were not replaced. */
/*=====================================*/
for (i = 0; i < (int) oldFact->theProposition.multifieldLength; i++)
{
if ((newFact->theProposition.theFields[i].type == MULTIFIELD) &&
(newFact->theProposition.theFields[i].value == NULL))
{
newFact->theProposition.theFields[i].value =
CopyMultifield(theEnv,(struct multifield *) oldFact->theProposition.theFields[i].value);
}
}
/*======================================*/
/* Perform the duplicate/modify action. */
/*======================================*/
if (retractIt) EnvRetract(theEnv,oldFact);
theFact = (struct fact *) EnvAssert(theEnv,newFact);
/*========================================*/
/* The asserted fact is the return value. */
/*========================================*/
if (theFact != NULL)
{
SetpDOBegin(returnValue,1);
SetpDOEnd(returnValue,theFact->theProposition.multifieldLength);
SetpType(returnValue,FACT_ADDRESS);
SetpValue(returnValue,(void *) theFact);
}
return;
}
