diogo/yap-6.3
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iteration support

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This commit is contained in:
Vítor Santos Costa 2013-09-28 12:04:52 +01:00
parent e19b58cf53
commit 5b6a3bffc1
1 changed files with 35 additions and 0 deletions
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35
C/utilpreds.c
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@ -5578,6 +5578,39 @@ p_free_arguments( USES_REGS1 )
}
}
static Int
p_freshen_variables( USES_REGS1 )
{
Term t = Deref(ARG1);
Functor f = FunctorOfTerm(t);
UInt arity = ArityOfFunctor(f), i;
Term tn = Yap_MkNewApplTerm(f, arity);
CELL *src = RepAppl(t)+1;
CELL *targ = RepAppl(tn)+1;
for (i=0; i< arity; i++) {
RESET_VARIABLE(targ);
*VarOfTerm(*src) = (CELL)targ;
targ++;
src++;
}
return TRUE;
}
static Int
p_reset_variables( USES_REGS1 )
{
Term t = Deref(ARG1);
Functor f = FunctorOfTerm(t);
UInt arity = ArityOfFunctor(f), i;
CELL *src = RepAppl(t)+1;
for (i=0; i< arity; i++) {
RESET_VARIABLE(VarOfTerm(*src));
src++;
}
return TRUE;
}
void Yap_InitUtilCPreds(void)
{
CACHE_REGS
@ -5615,6 +5648,8 @@ void Yap_InitUtilCPreds(void)
Yap_InitCPred("export_term", 3, p_export_term, 0);
Yap_InitCPred("kill_exported_term", 1, p_kill_exported_term, SafePredFlag);
Yap_InitCPred("import_term", 2, p_import_term, 0);
Yap_InitCPred("freshen_variables", 1, p_freshen_variables, 0);
Yap_InitCPred("reset_variables", 1, p_reset_variables, 0);
CurrentModule = cm;
#ifdef DEBUG
Yap_InitCPred("$force_trail_expansion", 1, p_force_trail_expansion, SafePredFlag);