OpEntry *Yap_GetOpPropForAModuleHavingALock(
Atom a, Term mod) { /* look property list of atom a for kind */
AtomEntry *ae = RepAtom(a);
PropEntry *pp;
pp = RepProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp) &&
(pp->KindOfPE != OpProperty || ((OpEntry *)pp)->OpModule != mod))
pp = RepProp(pp->NextOfPE);
if (EndOfPAEntr(pp)) {
return NULL;
}
return (OpEntry *)pp;
}
inline static Atom SearchInInvisible(const unsigned char *atom) {
AtomEntry *chain;
READ_LOCK(INVISIBLECHAIN.AERWLock);
chain = RepAtom(INVISIBLECHAIN.Entry);
while (!EndOfPAEntr(chain) && strcmp((char *)chain->StrOfAE, (char *)atom)) {
chain = RepAtom(chain->NextOfAE);
}
READ_UNLOCK(INVISIBLECHAIN.AERWLock);
if (EndOfPAEntr(chain))
return (NIL);
else
return (AbsAtom(chain));
}
static int
hidden (Atom at)
{
AtomEntry *chain;
READ_LOCK(INVISIBLECHAIN.AERWLock);
chain = RepAtom(INVISIBLECHAIN.Entry);
while (!EndOfPAEntr (chain) && AbsAtom (chain) != at)
chain = RepAtom(chain->NextOfAE);
READ_UNLOCK(INVISIBLECHAIN.AERWLock);
if (EndOfPAEntr (chain))
return (FALSE);
return (TRUE);
}
static void
RestoreAtomList(Atom atm)
{
AtomEntry *at;
at = RepAtom(atm);
if (EndOfPAEntr(at))
return;
do {
RestoreAtom(atm);
atm = CleanAtomMarkedBit(at->NextOfAE);
at = RepAtom(atm);
} while (!EndOfPAEntr(at));
}
int Yap_HasOp(Atom a) { /* look property list of atom a for kind */
AtomEntry *ae = RepAtom(a);
PropEntry *pp;
READ_LOCK(ae->ARWLock);
pp = RepProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp) && (pp->KindOfPE != OpProperty))
pp = RepProp(pp->NextOfPE);
READ_UNLOCK(ae->ARWLock);
if (EndOfPAEntr(pp)) {
return FALSE;
} else {
return TRUE;
}
}
OpEntry *
Yap_GetOpProp(Atom a,
op_type type
USES_REGS) { /* look property list of atom a for kind */
AtomEntry *ae = RepAtom(a);
PropEntry *pp;
OpEntry *oinfo = NULL;
READ_LOCK(ae->ARWLock);
pp = RepProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp)) {
OpEntry *info = NULL;
if (pp->KindOfPE != OpProperty) {
pp = RepProp(pp->NextOfPE);
continue;
}
info = (OpEntry *)pp;
if (info->OpModule != CurrentModule && info->OpModule != PROLOG_MODULE) {
pp = RepProp(pp->NextOfPE);
continue;
}
if (type == INFIX_OP) {
if (!info->Infix) {
pp = RepProp(pp->NextOfPE);
continue;
}
} else if (type == POSFIX_OP) {
if (!info->Posfix) {
pp = RepProp(pp->NextOfPE);
continue;
}
} else {
if (!info->Prefix) {
pp = RepProp(pp->NextOfPE);
continue;
}
}
/* if it is not the latest module */
if (info->OpModule == PROLOG_MODULE) {
/* cannot commit now */
oinfo = info;
pp = RepProp(pp->NextOfPE);
} else {
READ_LOCK(info->OpRWLock);
READ_UNLOCK(ae->ARWLock);
return info;
}
}
if (oinfo) {
READ_LOCK(oinfo->OpRWLock);
READ_UNLOCK(ae->ARWLock);
return oinfo;
}
READ_UNLOCK(ae->ARWLock);
return NULL;
}
static Prop
GetAPropHavingLock(AtomEntry *ae,
PropFlags kind) { /* look property list of atom a for kind */
PropEntry *pp;
pp = RepProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp) && pp->KindOfPE != kind)
pp = RepProp(pp->NextOfPE);
return (AbsProp(pp));
}
static int
OpDec(int p, const char *type, Atom a, Term m)
{
int i;
AtomEntry *ae = RepAtom(a);
OpEntry *info;
if (m == TermProlog)
m = PROLOG_MODULE;
else if (m == USER_MODULE)
m = PROLOG_MODULE;
for (i = 1; i <= 7; ++i)
if (strcmp(type, optypes[i]) == 0)
break;
if (i > 7) {
Yap_Error(DOMAIN_ERROR_OPERATOR_SPECIFIER,MkAtomTerm(Yap_LookupAtom(type)),"op/3");
return(FALSE);
}
if (p) {
if (i == 1 || i == 2 || i == 4)
p |= DcrlpFlag;
if (i == 1 || i == 3 || i == 6)
p |= DcrrpFlag;
}
WRITE_LOCK(ae->ARWLock);
info = Yap_GetOpPropForAModuleHavingALock(ae, m);
if (EndOfPAEntr(info)) {
info = (OpEntry *) Yap_AllocAtomSpace(sizeof(OpEntry));
info->KindOfPE = Ord(OpProperty);
info->OpModule = m;
info->OpName = a;
//LOCK(OpListLock);
info->OpNext = OpList;
OpList = info;
//UNLOCK(OpListLock);
AddPropToAtom(ae, (PropEntry *)info);
INIT_RWLOCK(info->OpRWLock);
WRITE_LOCK(info->OpRWLock);
WRITE_UNLOCK(ae->ARWLock);
info->Prefix = info->Infix = info->Posfix = 0;
} else {
WRITE_LOCK(info->OpRWLock);
WRITE_UNLOCK(ae->ARWLock);
}
if (i <= 3) {
GET_LD
if (truePrologFlag(PLFLAG_ISO) &&
info->Posfix != 0) /* there is a posfix operator */ {
/* ISO dictates */
WRITE_UNLOCK(info->OpRWLock);
Yap_Error(PERMISSION_ERROR_CREATE_OPERATOR,MkAtomTerm(a),"op/3");
return FALSE;
}
info->Infix = p;
} else if (i <= 5) {
/* this routine must be run at least having a read lock on ae */
static Prop
GetFunctorProp(AtomEntry *ae,
unsigned int arity) { /* look property list of atom a for kind */
FunctorEntry *pp;
pp = RepFunctorProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp) &&
(!IsFunctorProperty(pp->KindOfPE) || pp->ArityOfFE != arity))
pp = RepFunctorProp(pp->NextOfPE);
return (AbsFunctorProp(pp));
}
static Int
p_binary_is(void)
{ /* X is Y */
Term t = Deref(ARG2);
Term t1, t2;
if (IsVarTerm(t)) {
Yap_ArithError(INSTANTIATION_ERROR,t, "X is Y");
return(FALSE);
}
t1 = Yap_Eval(Deref(ARG3));
if (!Yap_FoundArithError(t1, ARG3)) {
return FALSE;
}
t2 = Yap_Eval(Deref(ARG4));
if (!Yap_FoundArithError(t2, ARG4)) {
return FALSE;
}
if (IsIntTerm(t)) {
Term tout = Yap_FoundArithError(eval2(IntOfTerm(t), t1, t2), 0L);
if (!tout)
return FALSE;
return Yap_unify_constant(ARG1,tout);
}
if (IsAtomTerm(t)) {
Atom name = AtomOfTerm(t);
ExpEntry *p;
Term out;
if (EndOfPAEntr(p = RepExpProp(Yap_GetExpProp(name, 2)))) {
Term ti[2];
/* error */
ti[0] = t;
ti[1] = MkIntTerm(1);
t = Yap_MkApplTerm(FunctorSlash, 2, ti);
Yap_Error(TYPE_ERROR_EVALUABLE, t,
"functor %s/%d for arithmetic expression",
RepAtom(name)->StrOfAE,2);
P = FAILCODE;
return(FALSE);
}
if (!(out=Yap_FoundArithError(eval2(p->FOfEE, t1, t2), 0L)))
return FALSE;
return Yap_unify_constant(ARG1,out);
}
return FALSE;
}
static Int
p_binary_op_as_integer(void)
{ /* X is Y */
Term t = Deref(ARG1);
if (IsVarTerm(t)) {
Yap_Error(INSTANTIATION_ERROR,t, "X is Y");
return(FALSE);
}
if (IsIntTerm(t)) {
return Yap_unify_constant(ARG2,t);
}
if (IsAtomTerm(t)) {
Atom name = AtomOfTerm(t);
ExpEntry *p;
if (EndOfPAEntr(p = RepExpProp(Yap_GetExpProp(name, 2)))) {
return Yap_unify(ARG1,ARG2);
}
return Yap_unify_constant(ARG2,MkIntTerm(p->FOfEE));
}
return(FALSE);
}
OpEntry *
Yap_OpPropForModule(Atom a,
Term mod) { /* look property list of atom a for kind */
AtomEntry *ae = RepAtom(a);
PropEntry *pp;
OpEntry *info = NULL;
if (mod == TermProlog)
mod = PROLOG_MODULE;
WRITE_LOCK(ae->ARWLock);
pp = RepProp(ae->PropsOfAE);
while (!EndOfPAEntr(pp)) {
if (pp->KindOfPE == OpProperty) {
info = (OpEntry *)pp;
if (info->OpModule == mod) {
WRITE_LOCK(info->OpRWLock);
WRITE_UNLOCK(ae->ARWLock);
return info;
}
}
pp = pp->NextOfPE;
}
info = (OpEntry *)Yap_AllocAtomSpace(sizeof(OpEntry));
info->KindOfPE = Ord(OpProperty);
info->OpModule = mod;
info->OpName = a;
LOCK(OpListLock);
info->OpNext = OpList;
OpList = info;
UNLOCK(OpListLock);
AddPropToAtom(ae, (PropEntry *)info);
INIT_RWLOCK(info->OpRWLock);
WRITE_LOCK(info->OpRWLock);
WRITE_UNLOCK(ae->ARWLock);
info->Prefix = info->Infix = info->Posfix = 0;
return info;
}
static Term
Eval(Term t USES_REGS)
{
if (IsVarTerm(t)) {
return Yap_ArithError(INSTANTIATION_ERROR,t,"in arithmetic");
} else if (IsNumTerm(t)) {
return t;
} else if (IsAtomTerm(t)) {
ExpEntry *p;
Atom name = AtomOfTerm(t);
if (EndOfPAEntr(p = RepExpProp(Yap_GetExpProp(name, 0)))) {
/* error */
Term ti[2];
/* error */
ti[0] = t;
ti[1] = MkIntTerm(0);
t = Yap_MkApplTerm(FunctorSlash, 2, ti);
return Yap_ArithError(TYPE_ERROR_EVALUABLE, t,
"atom %s in arithmetic expression",
RepAtom(name)->StrOfAE);
}
return Yap_eval_atom(p->FOfEE);
} else if (IsApplTerm(t)) {
Functor fun = FunctorOfTerm(t);
if (fun == FunctorString) {
const char *s = StringOfTerm(t);
if (s[1] == '\0')
return MkIntegerTerm(s[0]);
return Yap_ArithError(TYPE_ERROR_EVALUABLE, t,
"string in arithmetic expression");
} else if ((Atom)fun == AtomFoundVar) {
return Yap_ArithError(TYPE_ERROR_EVALUABLE, TermNil,
"cyclic term in arithmetic expression");
} else {
Int n = ArityOfFunctor(fun);
Atom name = NameOfFunctor(fun);
ExpEntry *p;
Term t1, t2;
if (EndOfPAEntr(p = RepExpProp(Yap_GetExpProp(name, n)))) {
Term ti[2];
/* error */
ti[0] = t;
ti[1] = MkIntegerTerm(n);
t = Yap_MkApplTerm(FunctorSlash, 2, ti);
return Yap_ArithError(TYPE_ERROR_EVALUABLE, t,
"functor %s/%d for arithmetic expression",
RepAtom(name)->StrOfAE,n);
}
if (p->FOfEE == op_power && p->ArityOfEE == 2) {
t2 = ArgOfTerm(2, t);
if (IsPairTerm(t2)) {
return get_matrix_element(ArgOfTerm(1, t), t2 PASS_REGS);
}
}
*RepAppl(t) = (CELL)AtomFoundVar;
t1 = Eval(ArgOfTerm(1,t) PASS_REGS);
if (t1 == 0L) {
*RepAppl(t) = (CELL)fun;
return FALSE;
}
if (n == 1) {
*RepAppl(t) = (CELL)fun;
return Yap_eval_unary(p->FOfEE, t1);
}
t2 = Eval(ArgOfTerm(2,t) PASS_REGS);
*RepAppl(t) = (CELL)fun;
if (t2 == 0L)
return FALSE;
return Yap_eval_binary(p->FOfEE,t1,t2);
}
} /* else if (IsPairTerm(t)) */ {
if (TailOfTerm(t) != TermNil) {
return Yap_ArithError(TYPE_ERROR_EVALUABLE, t,
"string must contain a single character to be evaluated as an arithmetic expression");
}
return Eval(HeadOfTerm(t) PASS_REGS);
}
}
