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19bfe301db
yap-6.3/C/cmppreds.c
vsc 80fd1bcc91 many fixes: restart on threads, fixes for tabling, other generic fixes 
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@954 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2003-12-27 00:38:53 +00:00

1045 lines
22 KiB
C
Raw Blame History

/*************************************************************************
* *
* YAP Prolog *
* *
* Yap Prolog was developed at NCCUP - Universidade do Porto *
* *
* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
* *
**************************************************************************
* *
* File: cmppreds.c *
* Last rev: *
* mods: *
* comments: comparing two prolog terms *
* *
*************************************************************************/
#ifdef SCCS
static char SccsId[] = "%W% %G%";
#endif
#include "Yap.h"
#include "Yatom.h"
#include "Heap.h"
#include "eval.h"
#if HAVE_STRING_H
#include <string.h>
#endif
STATIC_PROTO(Int compare, (Term, Term));
STATIC_PROTO(Int p_compare, (void));
STATIC_PROTO(Int p_acomp, (void));
STATIC_PROTO(Int a_eq, (Term,Term));
STATIC_PROTO(Int a_dif, (Term,Term));
STATIC_PROTO(Int a_gt, (Term, Term));
STATIC_PROTO(Int a_ge, (Term,Term));
STATIC_PROTO(Int a_lt, (Term,Term));
STATIC_PROTO(Int a_le, (Term,Term));
STATIC_PROTO(Int p_noteq, (void));
STATIC_PROTO(Int p_gen_lt, (void));
STATIC_PROTO(Int p_gen_le, (void));
STATIC_PROTO(Int p_gen_gt, (void));
STATIC_PROTO(Int p_gen_ge, (void));
#define rfloat(X) ( X > 0.0 ? 1 : ( X == 0.0 ? 0 : -1))
static int compare_complex(register CELL *pt0, register CELL *pt0_end, register
CELL *pt1)
{
register CELL **to_visit = (CELL **)H;
register int out = 0;
loop:
while (pt0 < pt0_end) {
register CELL d0, d1;
++ pt0;
++ pt1;
d0 = Derefa(pt0);
d1 = Derefa(pt1);
if (IsVarTerm(d0)) {
if (IsVarTerm(d1)) {
out = Signed(d0) - Signed(d1);
if (out) goto done;
}
else {
out = -1;
goto done;
}
} else if (IsVarTerm(d1)) {
out = 1;
goto done;
} else {
if (d0 == d1) continue;
else if (IsAtomTerm(d0)) {
if (IsAtomTerm(d1))
out = strcmp(
RepAtom(AtomOfTerm(d0))->StrOfAE,
RepAtom(AtomOfTerm(d1))->StrOfAE
);
else if (IsPrimitiveTerm(d1))
out = 1;
else out = -1;
/* I know out must be != 0 */
goto done;
}
else if (IsIntTerm(d0)) {
if (IsIntTerm(d1))
out = IntOfTerm(d0) - IntOfTerm(d1);
else if (IsFloatTerm(d1)) {
out = 1;
} else if (IsLongIntTerm(d1)) {
out = IntOfTerm(d0) - LongIntOfTerm(d1);
#ifdef USE_GMP
} else if (IsBigIntTerm(d1)) {
out = -mpz_cmp_si(Yap_BigIntOfTerm(d1), IntOfTerm(d0));
#endif
} else if (IsRefTerm(d1))
out = 1 ;
else out = -1;
if (out != 0)
goto done;
} else if (IsFloatTerm(d0)) {
if (IsFloatTerm(d1)){
out = rfloat(FloatOfTerm(d0) - FloatOfTerm(d1));
} else if (IsRefTerm(d1)) {
out = 1;
} else {
out = -1;
}
if (out != 0)
goto done;
} else if (IsLongIntTerm(d0)) {
if (IsIntTerm(d1))
out = LongIntOfTerm(d0) - IntOfTerm(d1);
else if (IsFloatTerm(d1)) {
out = 1;
} else if (IsLongIntTerm(d1)) {
out = LongIntOfTerm(d0) - LongIntOfTerm(d1);
#ifdef USE_GMP
} else if (IsBigIntTerm(d1)) {
out = -mpz_cmp_si(Yap_BigIntOfTerm(d1), LongIntOfTerm(d0));
#endif
} else if (IsRefTerm(d1)) {
out = 1 ;
} else {
out = -1;
}
if (out != 0)
goto done;
}
#ifdef USE_GMP
else if (IsBigIntTerm(d0)) {
if (IsIntTerm(d1))
out = mpz_cmp_si(Yap_BigIntOfTerm(d0), IntOfTerm(d1));
else if (IsFloatTerm(d1)) {
out = 1;
} else if (IsLongIntTerm(d1))
out = mpz_cmp_si(Yap_BigIntOfTerm(d0), LongIntOfTerm(d1));
else if (IsBigIntTerm(d1))
out = mpz_cmp(Yap_BigIntOfTerm(d0), Yap_BigIntOfTerm(d1));
else if (IsRefTerm(d1))
out = 1 ;
else out = -1;
if (out != 0)
goto done;
}
#endif
else if (IsPairTerm(d0)) {
if (!IsPairTerm(d1)) {
if (IsApplTerm(d1)) {
Functor f = FunctorOfTerm(d1);
if (IsExtensionFunctor(f))
out = 1;
else if (!(out = 2-ArityOfFunctor(f)))
out = strcmp(".",RepAtom(NameOfFunctor(f))->StrOfAE);
} else out = 1;
goto done;
}
#ifdef RATIONAL_TREES
to_visit[0] = pt0;
to_visit[1] = pt0_end;
to_visit[2] = pt1;
to_visit[3] = (CELL *)*pt0;
to_visit += 4;
*pt0 = d1;
#else
/* store the terms to visit */
if (pt0 < pt0_end) {
to_visit[0] = pt0;
to_visit[1] = pt0_end;
to_visit[2] = pt1;
to_visit += 3;
}
#endif
pt0 = RepPair(d0) - 1;
pt0_end = RepPair(d0) + 1;
pt1 = RepPair(d1) - 1;
continue;
}
else if (IsRefTerm(d0)) {
if (IsRefTerm(d1))
out = Unsigned(RefOfTerm(d1)) -
Unsigned(RefOfTerm(d0));
else out = -1;
goto done;
} else if (IsApplTerm(d0)) {
register Functor f;
register CELL *ap2, *ap3;
if (!IsApplTerm(d1)) {
out = 1 ;
goto done;
} else {
/* store the terms to visit */
Functor f2;
ap2 = RepAppl(d0);
ap3 = RepAppl(d1);
f = (Functor)(*ap2);
if (IsExtensionFunctor(f)) {
out = 1;
goto done;
}
f2 = (Functor)(*ap3);
if (IsExtensionFunctor(f2)) {
out = -1;
goto done;
}
/* compare functors */
if (f != (Functor)*ap3) {
if (!(out = ArityOfFunctor(f)-ArityOfFunctor(f2)))
out = strcmp(RepAtom(NameOfFunctor(f))->StrOfAE,
RepAtom(NameOfFunctor(f2))->StrOfAE);
goto done;
}
#ifdef RATIONAL_TREES
to_visit[0] = pt0;
to_visit[1] = pt0_end;
to_visit[2] = pt1;
to_visit[3] = (CELL *)*pt0;
to_visit += 4;
*pt0 = d1;
#else
/* store the terms to visit */
if (pt0 < pt0_end) {
to_visit[0] = pt0;
to_visit[1] = pt0_end;
to_visit[2] = pt1;
to_visit += 3;
}
#endif
d0 = ArityOfFunctor(f);
pt0 = ap2;
pt0_end = ap2 + d0;
pt1 = ap3;
continue;
}
}
}
}
/* Do we still have compound terms to visit */
if (to_visit > (CELL **)H) {
#ifdef RATIONAL_TREES
to_visit -= 4;
pt0 = to_visit[0];
pt0_end = to_visit[1];
pt1 = to_visit[2];
*pt0 = (CELL)to_visit[3];
#else
to_visit -= 3;
pt0 = to_visit[0];
pt0_end = to_visit[1];
pt1 = to_visit[2];
#endif
goto loop;
}
done:
/* failure */
#ifdef RATIONAL_TREES
while (to_visit > (CELL **)H) {
to_visit -= 4;
pt0 = to_visit[0];
pt0_end = to_visit[1];
pt1 = to_visit[2];
*pt0 = (CELL)to_visit[3];
}
#endif
return(out);
}
inline static Int
compare(register Term t1,register Term t2) /* compare terms t1 and t2 */
{
Int r;
t1 = Deref(t1);
t2 = Deref(t2);
if (t1 == t2)
return (0);
if (IsVarTerm(t1)) {
if (IsVarTerm(t2))
return (Signed(t1) - Signed(t2));
return (-1);
} else if (IsVarTerm(t2))
return (1);
if (IsAtomTerm(t1)) {
if (IsAtomTerm(t2))
return (strcmp(
RepAtom(AtomOfTerm(t1))->StrOfAE,
RepAtom(AtomOfTerm(t2))->StrOfAE
));
if (IsPrimitiveTerm(t2))
return (1);
return (-1);
}
if (IsIntTerm(t1)) {
if (IsIntTerm(t2))
return (IntOfTerm(t1) - IntOfTerm(t2));
if (IsFloatTerm(t2)) {
return(1);
}
if (IsLongIntTerm(t2))
return(IntOfTerm(t1) - LongIntOfTerm(t2));
#ifdef USE_GMP
if (IsBigIntTerm(t2))
return(-mpz_cmp_si(Yap_BigIntOfTerm(t2),IntOfTerm(t1)));
#endif
if (IsRefTerm(t2))
return (1);
return (-1);
}
if (IsFloatTerm(t1)) {
if (IsFloatTerm(t2))
return(rfloat(FloatOfTerm(t1) - FloatOfTerm(t2)));
if (IsRefTerm(t2))
return (1);
return (-1);
}
if (IsLongIntTerm(t1)) {
if (IsIntTerm(t2))
return (LongIntOfTerm(t1) - IntOfTerm(t2));
if (IsFloatTerm(t2)) {
return(1);
}
if (IsLongIntTerm(t2))
return (LongIntOfTerm(t1) - LongIntOfTerm(t2));
#ifdef USE_GMP
if (IsBigIntTerm(t2))
return(-mpz_cmp_si(Yap_BigIntOfTerm(t2), LongIntOfTerm(t1)));
#endif
if (IsRefTerm(t2))
return (1);
return (-1);
}
#ifdef USE_GMP
if (IsBigIntTerm(t1)) {
if (IsIntTerm(t2))
return(mpz_cmp_si(Yap_BigIntOfTerm(t1), IntOfTerm(t2)));
if (IsFloatTerm(t2)) {
return(1);
}
if (IsLongIntTerm(t2))
return(mpz_cmp_si(Yap_BigIntOfTerm(t1), LongIntOfTerm(t2)));
if (IsBigIntTerm(t2))
return(mpz_cmp(Yap_BigIntOfTerm(t1), Yap_BigIntOfTerm(t2)));
if (IsRefTerm(t2))
return(1);
return(-1);
}
#endif
if (IsPairTerm(t1)) {
if (IsApplTerm(t2)) {
Functor f = FunctorOfTerm(t2);
if (IsExtensionFunctor(f))
return(1);
else {
int out;
if (!(out = 2-ArityOfFunctor(f)))
out = strcmp(".",RepAtom(NameOfFunctor(f))->StrOfAE);
return(out);
}
}
if (IsPairTerm(t2)) {
return(compare_complex(RepPair(t1)-1,
RepPair(t1)+1,
RepPair(t2)-1));
}
else return (1);
}
if (IsRefTerm(t1)) {
if (IsRefTerm(t2))
return (Unsigned(RefOfTerm(t2)) -
Unsigned(RefOfTerm(t1)));
return (-1);
}
if (!IsApplTerm(t2))
return (1);
/* compound term */
{ Functor fun1 = FunctorOfTerm(t1);
Functor fun2;
fun2 = FunctorOfTerm(t2);
if (IsExtensionFunctor(fun2))
return(1);
r = ArityOfFunctor(fun1) - ArityOfFunctor(fun2);
if (r)
return (r);
r = strcmp(RepAtom(NameOfFunctor(fun1))->StrOfAE,
RepAtom(NameOfFunctor(fun2))->StrOfAE);
if (r)
return (r);
else
return(compare_complex(RepAppl(t1),
RepAppl(t1)+ArityOfFunctor(fun1),
RepAppl(t2)));
}
}
int Yap_compare_terms(register CELL d0, register CELL d1)
{
return (compare(d0,d1));
}
static Int
p_compare(void)
{ /* compare(?Op,?T1,?T2) */
Int r = compare(ARG2, ARG3);
Atom p;
if (r < 0)
p = AtomLT;
else if (r > 0)
p = AtomGT;
else
p = AtomEQ;
return (Yap_unify_constant(ARG1, MkAtomTerm(p)));
}
inline static int
int_cmp(Int dif)
{
if (dif < 0)
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomLT)));
else if (dif > 0)
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomGT)));
else
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomEQ)));
}
inline static int
flt_cmp(Float dif)
{
if (dif < 0.0)
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomLT)));
else if (dif > 0.0)
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomGT)));
else
return(Yap_unify_constant(ARG1,MkAtomTerm(AtomEQ)));
}
static Int
p_acomp(void)
{ /* $a_compare(?R,+X,+Y) */
register blob_type bt1;
Term t1 = Deref(ARG1);
Term t2 = Deref(ARG2);
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "=:=/2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, "=:=/2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2)) {
return(flt_cmp(FloatOfTerm(t1)-FloatOfTerm(t2)));
}
if (IsIntegerTerm(t1) && IsIntegerTerm(t2)) {
return(int_cmp(IntegerOfTerm(t1)-IntegerOfTerm(t2)));
}
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(int_cmp(v1.Int-v2.Int));
case double_e:
return(flt_cmp(v1.Int-v2.dbl));
#ifdef USE_GMP
case big_int_e:
return(int_cmp(-mpz_cmp_si(v2.big,v1.Int)));
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(flt_cmp(v1.dbl-v2.Int));
case double_e:
return(flt_cmp(v1.dbl-v2.dbl));
#ifdef USE_GMP
case big_int_e:
return(flt_cmp(v1.dbl-mpz_get_d(v2.big)));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(int_cmp(mpz_cmp_si(v1.big,v2.Int)));
case double_e:
return(flt_cmp(mpz_get_d(v1.big)-v2.dbl));
case big_int_e:
return(int_cmp(mpz_cmp(v1.big,v2.big)));
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_eq(Term t1, Term t2)
{ /* A =:= B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "=:=/2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, "=:=/2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) == FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) == IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int == v2.Int);
case double_e:
return(v1.Int == v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) == 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl == v2.Int);
case double_e:
return(v1.dbl == v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl == mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) == 0);
case double_e:
return(mpz_get_d(v1.big) == v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) == 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_dif(Term t1, Term t2)
{ /* A =\\= B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "=\\=/2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, "=\\=/2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) != FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) != IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int != v2.Int);
case double_e:
return(v1.Int != v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) != 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl != v2.Int);
case double_e:
return(v1.dbl != v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl != mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) != 0);
case double_e:
return(mpz_get_d(v1.big) != v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) != 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_gt(Term t1, Term t2)
{ /* A > B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, ">/2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, ">/2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) > FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) > IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int > v2.Int);
case double_e:
return(v1.Int > v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) > 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl > v2.Int);
case double_e:
return(v1.dbl > v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl > mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) > 0);
case double_e:
return(mpz_get_d(v1.big) > v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) > 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_ge(Term t1, Term t2)
{ /* A >= B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, ">=/2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t1, ">=/2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) >= FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) >= IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int >= v2.Int);
case double_e:
return(v1.Int >= v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) >= 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl >= v2.Int);
case double_e:
return(v1.dbl >= v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl >= mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) >= 0);
case double_e:
return(mpz_get_d(v1.big) >= v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) >= 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_lt(Term t1, Term t2)
{ /* A < B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "</2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, "</2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) < FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) < IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int < v2.Int);
case double_e:
return(v1.Int < v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) < 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl < v2.Int);
case double_e:
return(v1.dbl < v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl < mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) < 0);
case double_e:
return(mpz_get_d(v1.big) < v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) < 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
a_le(Term t1, Term t2)
{ /* A <= B */
blob_type bt1;
union arith_ret v1;
if (IsVarTerm(t1)) {
Yap_Error(INSTANTIATION_ERROR, t1, "=</2");
return(FALSE);
}
if (IsVarTerm(t2)) {
Yap_Error(INSTANTIATION_ERROR, t2, "=</2");
return(FALSE);
}
if (IsFloatTerm(t1) && IsFloatTerm(t2))
return (FloatOfTerm(t1) <= FloatOfTerm(t2));
if (IsIntegerTerm(t1) && IsIntegerTerm(t2))
return (IntegerOfTerm(t1) <= IntegerOfTerm(t2));
bt1 = Yap_Eval(t1, &v1);
switch (bt1) {
case long_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.Int <= v2.Int);
case double_e:
return(v1.Int <= v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(-mpz_cmp_si(v2.big,v1.Int) <= 0);
#endif
default:
return(FALSE);
}
}
case double_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(v1.dbl <= v2.Int);
case double_e:
return(v1.dbl <= v2.dbl);
#ifdef USE_GMP
case big_int_e:
return(v1.dbl <= mpz_get_d(v2.big));
#endif
default:
return(FALSE);
}
}
#ifdef USE_GMP
case big_int_e:
{
union arith_ret v2;
blob_type bt2 = Yap_Eval(t2, &v2);
switch (bt2) {
case long_int_e:
return(mpz_cmp_si(v1.big,v2.Int) <= 0);
case double_e:
return(mpz_get_d(v1.big) <= v2.dbl);
case big_int_e:
return(mpz_cmp(v1.big,v2.big) <= 0);
default:
return(FALSE);
}
}
#endif
default:
return(FALSE);
}
}
static Int
p_noteq(void)
{
return (compare(ARG1, ARG2) != 0);
}
static Int
p_gen_lt(void)
{
return (compare(ARG1, ARG2) < 0);
}
static Int
p_gen_le(void)
{
return (compare(ARG1, ARG2) <= 0);
}
static Int
p_gen_gt(void)
{
return (compare(ARG1, ARG2) > 0);
}
static Int
p_gen_ge(void)
{
return (compare(ARG1, ARG2) >= 0);
}
void
Yap_InitCmpPreds(void)
{
Yap_InitCmpPred("=:=", 2, a_eq, SafePredFlag | BinaryTestPredFlag);
Yap_InitCmpPred("=\\=", 2, a_dif, SafePredFlag | BinaryTestPredFlag);
Yap_InitCmpPred(">", 2, a_gt, SafePredFlag | BinaryTestPredFlag);
Yap_InitCmpPred("=<", 2, a_le, SafePredFlag | BinaryTestPredFlag);
Yap_InitCmpPred("<", 2, a_lt, SafePredFlag | BinaryTestPredFlag);
Yap_InitCmpPred(">=", 2, a_ge, SafePredFlag | BinaryTestPredFlag);
Yap_InitCPred("$a_compare", 3, p_acomp, TestPredFlag | SafePredFlag);
Yap_InitCPred("\\==", 2, p_noteq, TestPredFlag | SafePredFlag);
Yap_InitCPred("@<", 2, p_gen_lt, TestPredFlag | SafePredFlag);
Yap_InitCPred("@=<", 2, p_gen_le, TestPredFlag | SafePredFlag);
Yap_InitCPred("@>", 2, p_gen_gt, TestPredFlag | SafePredFlag);
Yap_InitCPred("@>=", 2, p_gen_ge, TestPredFlag | SafePredFlag);
Yap_InitCPred("compare", 3, p_compare, TestPredFlag | SafePredFlag);
}
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