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- Added more generic term iterators.

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This commit is contained in:
ccremers 2004-08-18 12:12:29 +00:00
parent eb5a39522b
commit c5695d6fe8
2 changed files with 77 additions and 1 deletions
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74
src/term.c
View File

@ -278,7 +278,8 @@ termSubTerm (Term t, Term tsub)
return (termSubTerm (t->left.op1, tsub)
|| termSubTerm (t->right.op2, tsub));
else
return (termSubTerm (t->left.op, tsub) || termSubTerm (t->right.key, tsub));
return (termSubTerm (t->left.op, tsub)
|| termSubTerm (t->right.key, tsub));
}
//! See if a term is an interm of another.
@ -912,6 +913,77 @@ termOrder (Term t1, Term t2)
}
}
//! Generic term iteration
int
term_iterate (const Term term, int (*leaf) (), int (*nodel) (),
int (*nodem) (), int (*noder) ())
{
if (term != NULL)
{
if (realTermLeaf (term))
{
// Leaf
if (leaf != NULL)
{
return leaf (term);
}
}
else
{
int flag;
flag = 1;
if (nodel != NULL)
flag = flag && nodel (term);
if (realTermTuple (term))
flag = flag
&& (term_iterate (term->left.op1, leaf, nodel, nodem, noder));
else
flag = flag
&& (term_iterate (term->left.op, leaf, nodel, nodem, noder));
if (nodem != NULL)
flag = flag && nodem (term);
if (realTermTuple (term))
flag = flag
&& (term_iterate (term->left.op1, leaf, nodel, nodem, noder));
else
flag = flag
&& (term_iterate (term->left.op, leaf, nodel, nodem, noder));
if (noder != NULL)
flag = flag && noder (term);
}
}
return 1;
}
//! Generic term iteration with deVar
int
term_iterate_deVar (const Term term, int (*leaf) (), int (*nodel) (),
int (*nodem) (), int (*noder) ())
{
int deVar_leaf (const Term term)
{
if (substVar (term))
{
return term_iterate_deVar (term->subst, deVar_leaf, nodel, nodem,
noder);
}
else
{
if (leaf == NULL)
return 1;
else
return leaf (term);
}
}
return term_iterate (term, deVar_leaf, nodel, nodem, noder);
}
//! Iterate over the leaves in a term
/**
* Note that this function iterates over real leaves; thus closed variables can occur as

4
src/term.h
View File

@ -168,6 +168,10 @@ Term tupleProject (Term tt, int n);
int termSize (Term t);
float termDistance (Term t1, Term t2);
int termOrder (Term t1, Term t2);
int term_iterate (const Term term, int (*leaf) (), int (*nodel) (),
int (*nodem) (), int (*noder) ());
int term_iterate_deVar (const Term term, int (*leaf) (), int (*nodel) (),
int (*nodem) (), int (*noder) ());
int term_iterate_leaves (const Term t, int (*func) ());
int term_iterate_open_leaves (const Term term, int (*func) ());
void term_rolelocals_are_variables ();