static void DeallocateExternalFunctionData(
void *theEnv)
{
struct FunctionHash *fhPtr, *nextFHPtr;
int i;
#if ! RUN_TIME
struct FunctionDefinition *tmpPtr, *nextPtr;
tmpPtr = ExternalFunctionData(theEnv)->ListOfFunctions;
while (tmpPtr != NULL)
{
nextPtr = tmpPtr->next;
rtn_struct(theEnv,FunctionDefinition,tmpPtr);
tmpPtr = nextPtr;
}
#endif
if (ExternalFunctionData(theEnv)->FunctionHashtable == NULL)
{ return; }
for (i = 0; i < SIZE_FUNCTION_HASH; i++)
{
fhPtr = ExternalFunctionData(theEnv)->FunctionHashtable[i];
while (fhPtr != NULL)
{
nextFHPtr = fhPtr->next;
rtn_struct(theEnv,FunctionHash,fhPtr);
fhPtr = nextFHPtr;
}
}
genfree(theEnv,ExternalFunctionData(theEnv)->FunctionHashtable,
(int) sizeof (struct FunctionHash *) * SIZE_FUNCTION_HASH);
}
globle void InstallFunctionList(
void *theEnv,
struct FunctionDefinition *value)
{
int i;
struct FunctionHash *fhPtr, *nextPtr;
if (ExternalFunctionData(theEnv)->FunctionHashtable != NULL)
{
for (i = 0; i < SIZE_FUNCTION_HASH; i++)
{
fhPtr = ExternalFunctionData(theEnv)->FunctionHashtable[i];
while (fhPtr != NULL)
{
nextPtr = fhPtr->next;
rtn_struct(theEnv,FunctionHash,fhPtr);
fhPtr = nextPtr;
}
ExternalFunctionData(theEnv)->FunctionHashtable[i] = NULL;
}
}
ExternalFunctionData(theEnv)->ListOfFunctions = value;
while (value != NULL)
{
AddHashFunction(theEnv,value);
value = value->next;
}
}
static int RemoveHashFunction(
void *theEnv,
struct FunctionDefinition *fdPtr)
{
struct FunctionHash *fhPtr, *lastPtr = NULL;
unsigned hashValue;
hashValue = HashSymbol(ValueToString(fdPtr->callFunctionName),SIZE_FUNCTION_HASH);
for (fhPtr = ExternalFunctionData(theEnv)->FunctionHashtable[hashValue];
fhPtr != NULL;
fhPtr = fhPtr->next)
{
if (fhPtr->fdPtr == fdPtr)
{
if (lastPtr == NULL)
{ ExternalFunctionData(theEnv)->FunctionHashtable[hashValue] = fhPtr->next; }
else
{ lastPtr->next = fhPtr->next; }
rtn_struct(theEnv,FunctionHash,fhPtr);
return(TRUE);
}
lastPtr = fhPtr;
}
return(FALSE);
}
globle int UndefineFunction(
void *theEnv,
const char *functionName)
{
SYMBOL_HN *findValue;
struct FunctionDefinition *fPtr, *lastPtr = NULL;
findValue = (SYMBOL_HN *) FindSymbolHN(theEnv,functionName);
for (fPtr = ExternalFunctionData(theEnv)->ListOfFunctions;
fPtr != NULL;
fPtr = fPtr->next)
{
if (fPtr->callFunctionName == findValue)
{
DecrementSymbolCount(theEnv,fPtr->callFunctionName);
RemoveHashFunction(theEnv,fPtr);
if (lastPtr == NULL)
{ ExternalFunctionData(theEnv)->ListOfFunctions = fPtr->next; }
else
{ lastPtr->next = fPtr->next; }
ClearUserDataList(theEnv,fPtr->usrData);
rtn_struct(theEnv,FunctionDefinition,fPtr);
return(TRUE);
}
lastPtr = fPtr;
}
return(FALSE);
}
static void InitializeFunctionHashTable(
void *theEnv)
{
int i;
ExternalFunctionData(theEnv)->FunctionHashtable = (struct FunctionHash **)
gm2(theEnv,(int) sizeof (struct FunctionHash *) *
SIZE_FUNCTION_HASH);
for (i = 0; i < SIZE_FUNCTION_HASH; i++) ExternalFunctionData(theEnv)->FunctionHashtable[i] = NULL;
}
static void AddHashFunction(
void *theEnv,
struct FunctionDefinition *fdPtr)
{
struct FunctionHash *newhash, *temp;
unsigned hashValue;
if (ExternalFunctionData(theEnv)->FunctionHashtable == NULL) InitializeFunctionHashTable(theEnv);
newhash = get_struct(theEnv,FunctionHash);
newhash->fdPtr = fdPtr;
hashValue = HashSymbol(fdPtr->callFunctionName->contents,SIZE_FUNCTION_HASH);
temp = ExternalFunctionData(theEnv)->FunctionHashtable[hashValue];
ExternalFunctionData(theEnv)->FunctionHashtable[hashValue] = newhash;
newhash->next = temp;
}
globle struct FunctionDefinition *FindFunction(
void *theEnv,
const char *functionName)
{
struct FunctionHash *fhPtr;
unsigned hashValue;
SYMBOL_HN *findValue;
if (ExternalFunctionData(theEnv)->FunctionHashtable == NULL) return(NULL);
hashValue = HashSymbol(functionName,SIZE_FUNCTION_HASH);
findValue = (SYMBOL_HN *) FindSymbolHN(theEnv,functionName);
for (fhPtr = ExternalFunctionData(theEnv)->FunctionHashtable[hashValue];
fhPtr != NULL;
fhPtr = fhPtr->next)
{
if (fhPtr->fdPtr->callFunctionName == findValue)
{ return(fhPtr->fdPtr); }
}
return(NULL);
}
globle struct FunctionDefinition *GetFunctionList(
void *theEnv)
{
return(ExternalFunctionData(theEnv)->ListOfFunctions);
}
globle int DefineFunction3(
void *theEnv,
const char *name,
int returnType,
int (*pointer)(void *),
const char *actualName,
const char *restrictions,
intBool environmentAware,
void *context)
{
struct FunctionDefinition *newFunction;
if ( (returnType != 'a') &&
(returnType != 'b') &&
(returnType != 'c') &&
(returnType != 'd') &&
(returnType != 'f') &&
(returnType != 'g') &&
(returnType != 'i') &&
(returnType != 'j') &&
(returnType != 'k') &&
(returnType != 'l') &&
(returnType != 'm') &&
(returnType != 'n') &&
#if OBJECT_SYSTEM
(returnType != 'o') &&
#endif
(returnType != 's') &&
(returnType != 'u') &&
(returnType != 'v') &&
#if OBJECT_SYSTEM
(returnType != 'x') &&
#endif
(returnType != 'w') )
{ return(0); }
newFunction = FindFunction(theEnv,name);
if (newFunction == NULL)
{
newFunction = get_struct(theEnv,FunctionDefinition);
newFunction->callFunctionName = (SYMBOL_HN *) EnvAddSymbol(theEnv,name);
IncrementSymbolCount(newFunction->callFunctionName);
newFunction->next = GetFunctionList(theEnv);
ExternalFunctionData(theEnv)->ListOfFunctions = newFunction;
AddHashFunction(theEnv,newFunction);
}
newFunction->returnValueType = (char) returnType;
newFunction->functionPointer = (int (*)(void)) pointer;
newFunction->actualFunctionName = actualName;
if (restrictions != NULL)
{
if (((int) (strlen(restrictions)) < 2) ? TRUE :
((! isdigit(restrictions[0]) && (restrictions[0] != '*')) ||
(! isdigit(restrictions[1]) && (restrictions[1] != '*'))))
restrictions = NULL;
}
newFunction->restrictions = restrictions;
newFunction->parser = NULL;
newFunction->overloadable = TRUE;
newFunction->sequenceuseok = TRUE;
newFunction->environmentAware = (short) environmentAware;
newFunction->usrData = NULL;
newFunction->context = context;
return(1);
}
bool DefineFunction3(
void *theEnv,
const char *name,
int returnType,
unsigned returnTypeBits,
void (*pointer)(UDFContext *,CLIPSValue *),
const char *actualName,
int minArgs,
int maxArgs,
const char *restrictions,
void *context)
{
struct FunctionDefinition *newFunction;
if ( (returnType != 'a') &&
(returnType != 'b') &&
(returnType != 'c') &&
(returnType != 'd') &&
(returnType != 'f') &&
(returnType != 'g') &&
(returnType != 'i') &&
(returnType != 'j') &&
(returnType != 'k') &&
(returnType != 'l') &&
(returnType != 'm') &&
(returnType != 'n') &&
#if OBJECT_SYSTEM
(returnType != 'o') &&
#endif
(returnType != 's') &&
(returnType != 'u') &&
(returnType != 'v') &&
#if OBJECT_SYSTEM
(returnType != 'x') &&
#endif
#if DEFTEMPLATE_CONSTRUCT
(returnType != 'y') &&
#endif
(returnType != 'w') &&
(returnType != 'z'))
{ return(false); }
newFunction = FindFunction(theEnv,name);
if (newFunction != NULL) return(0);
newFunction = get_struct(theEnv,FunctionDefinition);
newFunction->callFunctionName = (SYMBOL_HN *) EnvAddSymbol(theEnv,name);
IncrementSymbolCount(newFunction->callFunctionName);
newFunction->next = GetFunctionList(theEnv);
ExternalFunctionData(theEnv)->ListOfFunctions = newFunction;
AddHashFunction(theEnv,newFunction);
newFunction->returnValueType = (char) returnType;
newFunction->unknownReturnValueType = returnTypeBits;
newFunction->functionPointer = pointer;
newFunction->actualFunctionName = actualName;
newFunction->minArgs = minArgs;
newFunction->maxArgs = maxArgs;
if ((restrictions != NULL) && (returnType != 'z'))
{
if (((int) (strlen(restrictions)) < 2) ? true :
((! isdigit(restrictions[0]) && (restrictions[0] != '*')) ||
(! isdigit(restrictions[1]) && (restrictions[1] != '*'))))
restrictions = NULL;
}
if (restrictions == NULL)
{ newFunction->restrictions = NULL; }
else
{
newFunction->restrictions = EnvAddSymbol(theEnv,restrictions);
IncrementSymbolCount(newFunction->restrictions);
}
newFunction->parser = NULL;
newFunction->overloadable = true;
newFunction->sequenceuseok = true;
newFunction->usrData = NULL;
newFunction->context = context;
return(true);
}
