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yap-6.3/C/args.c

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#include "Yap.h"
#include "Yatom.h"
/**
* Scan a list of arguments and output results to a pre-processed vector.
*
* @param listl: input list
* @param def parameter definition
*
* @return all arguments, some of them set, some of them not.
*/
static xarg *
matchKey(Atom key, xarg *e0, int n, const param_t *def)
{
int i;
for (i=0; i< n; i++) {
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if (!strcmp((char *)def->name, (char *)RepAtom(key)->StrOfAE)) {
return e0;
}
def++;
e0++;
}
return NULL;
}
xarg *
Yap_ArgListToVector (Term listl, const param_t *def, int n)
{
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CACHE_REGS
xarg *a = calloc( n , sizeof(xarg) );
if (IsApplTerm(listl) && FunctorOfTerm(listl) == FunctorModule)
listl = ArgOfTerm(2,listl);
if (!IsPairTerm(listl) && listl != TermNil) {
if (IsVarTerm(listl) ) {
free( a );
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
LOCAL_Error_Term = listl;
return NULL;
}
if (IsAtomTerm(listl) ) {
xarg *na = matchKey( AtomOfTerm(listl), a, n, def);
if (!na) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
} else if (IsApplTerm(listl)) {
Functor f = FunctorOfTerm( listl );
if (IsExtensionFunctor(f)) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
xarg *na = matchKey( NameOfFunctor( f ), a, n, def);
if (!na) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
} else {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
listl = MkPairTerm( listl, TermNil );
}
while (IsPairTerm(listl)) {
Term hd = HeadOfTerm( listl );
listl = TailOfTerm( listl );
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if (IsVarTerm(hd) || IsVarTerm(listl)) {
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
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if (IsVarTerm(hd)) {
LOCAL_Error_Term = hd;
} else {
LOCAL_Error_Term = listl;
}
free( a );
return NULL;
}
if (IsAtomTerm(hd)) {
xarg *na = matchKey( AtomOfTerm( hd ), a, n, def);
if (!na)
return NULL;
na->used = true;
na->tvalue = TermNil;
continue;
} else if (IsApplTerm( hd )) {
Functor f = FunctorOfTerm( hd );
if (IsExtensionFunctor(f)) {
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LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
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LOCAL_Error_Term = hd;
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free( a );
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
LOCAL_Error_TYPE = DOMAIN_ERROR_OUT_OF_RANGE;
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LOCAL_Error_Term = hd;
free( a );
return NULL;
}
xarg *na = matchKey( NameOfFunctor( f ), a, n, def);
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if (!na) {
free( a );
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return NULL;
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}
na->used = 1;
na->tvalue = ArgOfTerm(1, hd);
} else {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
free( a );
return NULL;
}
}
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if (IsVarTerm(listl)) {
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
LOCAL_Error_Term = listl;
free( a );
return NULL;
} else if (listl != TermNil) {
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
free( a );
return NULL;
}
return a;
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}
static xarg *
matchKey2(Atom key, xarg *e0, int n, const param2_t *def)
{
int i;
for (i=0; i< n; i++) {
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if (!strcmp((char*)def->name, (char*)RepAtom(key)->StrOfAE)) {
return e0;
}
def++;
e0++;
}
return NULL;
}
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/// Yap_ArgList2ToVector is much the same as before,
/// but assumes parameters also have something called a
/// scope
xarg *
Yap_ArgList2ToVector (Term listl, const param2_t *def, int n)
{
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CACHE_REGS
xarg *a = calloc( n , sizeof(xarg) );
if (!IsPairTerm(listl) && listl != TermNil) {
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if (IsVarTerm(listl) ) {
free( a );
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
LOCAL_Error_Term = listl;
return NULL;
}
if (IsAtomTerm(listl) ) {
xarg *na = matchKey2( AtomOfTerm(listl), a, n, def);
if (!na) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
}
if (IsApplTerm(listl)) {
Functor f = FunctorOfTerm( listl );
if (IsExtensionFunctor(f)) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
xarg *na = matchKey2( NameOfFunctor( f ), a, n, def);
if (!na) {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
} else {
free( a );
LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
return NULL;
}
listl = MkPairTerm( listl, TermNil );
}
while (IsPairTerm(listl)) {
Term hd = HeadOfTerm( listl );
if (IsVarTerm(hd)) {
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
free( a );
return NULL;
}
if (IsAtomTerm(hd)) {
xarg *na = matchKey2( AtomOfTerm( hd ), a, n, def);
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if (!na) {
LOCAL_Error_TYPE = DOMAIN_ERROR_OUT_OF_RANGE;
LOCAL_Error_Term = hd;
free( a );
return NULL;
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}
na->used = true;
na->tvalue = TermNil;
continue;
} else if (IsApplTerm( hd )) {
Functor f = FunctorOfTerm( hd );
if (IsExtensionFunctor(f)) {
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LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
LOCAL_Error_Term = hd;
free( a );
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
LOCAL_Error_TYPE = DOMAIN_ERROR_OUT_OF_RANGE;
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LOCAL_Error_Term = hd;
free( a );
return NULL;
}
xarg *na = matchKey2( NameOfFunctor( f ), a, n, def);
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if (na) {
na->used = 1;
na->tvalue = ArgOfTerm(1, hd);
}
} else {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
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LOCAL_Error_Term = hd;
free( a );
return NULL;
}
listl = TailOfTerm(listl);
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}
if (IsVarTerm(listl)) {
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
free( a );
return NULL;
}
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if (TermNil != listl) {
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LOCAL_Error_TYPE = TYPE_ERROR_LIST;
LOCAL_Error_Term = listl;
free( a );
return NULL;
}
return a;
}