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support for handling lists of arguments

This commit is contained in:
Vítor Santos Costa 2015-06-18 00:16:07 +01:00
parent d474437edc
commit ff9051349b
1 changed files with 148 additions and 0 deletions
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148
C/args.c Normal file
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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++) {
if (!strcmp(def->name, RepAtom(key)->StrOfAE)) {
return e0;
}
def++;
e0++;
}
return NULL;
}
xarg *
Yap_ArgListToVector (Term listl, const param_t *def, int n)
{
CACHE_REGS
Term *tailp;
if (!IsPairTerm(listl) && listl != TermNil) {
listl = MkPairTerm( listl, TermNil );
}
Int length = Yap_SkipList( &listl, &tailp );
if (length < 0 )
return NULL;
xarg *a = calloc( n , sizeof(xarg) );
while (IsPairTerm(listl)) {
Term hd = HeadOfTerm( listl );
listl = TailOfTerm( listl );
if (IsVarTerm(hd)) {
LOCAL_Error_TYPE = INSTANTIATION_ERROR;
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)) {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
free( a );
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
LOCAL_Error_TYPE = DOMAIN_ERROR_OUT_OF_RANGE;
free( a );
return NULL;
}
xarg *na = matchKey( NameOfFunctor( f ), a, n, def);
na->used = 1;
na->tvalue = ArgOfTerm(1, hd);
} else {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
free( a );
return NULL;
}
}
return a;
}
static xarg *
matchKey2(Atom key, xarg *e0, int n, const param2_t *def)
{
int i;
for (i=0; i< n; i++) {
if (!strcmp(def->name, RepAtom(key)->StrOfAE)) {
return e0;
}
def++;
e0++;
}
return NULL;
}
xarg *
Yap_ArgList2ToVector (Term listl, const param2_t *def, int n)
{
CACHE_REGS
Term *tailp;
if (!IsPairTerm(listl) && listl != TermNil) {
listl = MkPairTerm( listl, TermNil );
}
Int length = Yap_SkipList( &listl, &tailp );
if (length < 0 )
return NULL;
xarg *a = calloc( n , sizeof(xarg) );
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);
if (!na)
return NULL;
na->used = true;
na->tvalue = TermNil;
continue;
} else if (IsApplTerm( hd )) {
Functor f = FunctorOfTerm( hd );
if (IsExtensionFunctor(f)) {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
free( a );
return NULL;
}
arity_t arity = ArityOfFunctor( f );
if (arity != 1) {
LOCAL_Error_TYPE = DOMAIN_ERROR_OUT_OF_RANGE;
free( a );
return NULL;
}
xarg *na = matchKey2( NameOfFunctor( f ), a, n, def);
na->used = 1;
na->tvalue = ArgOfTerm(1, hd);
} else {
LOCAL_Error_TYPE = TYPE_ERROR_PARAMETER;
free( a );
return NULL;
}
listl = TailOfTerm(listl);
}
return a;
}