idxset: implement pa_idxset_copy()

2 files changed, 17 insertions, 0 deletions

diff --git a/src/pulsecore/idxset.c b/src/pulsecore/idxset.c
index 352ac977..408011f6 100644
--- a/src/pulsecore/idxset.c
+++ b/src/pulsecore/idxset.c
@@ -453,3 +453,17 @@ pa_bool_t pa_idxset_isempty(pa_idxset *s) {
 
     return s->n_entries == 0;
 }
+
+pa_idxset *pa_idxset_copy(pa_idxset *s) {
+    pa_idxset *copy;
+    struct idxset_entry *i;
+
+    pa_assert(s);
+
+    copy = pa_idxset_new(s->hash_func, s->compare_func);
+
+    for (i = s->iterate_list_head; i; i = i->iterate_next)
+        pa_idxset_put(copy, i->data, NULL);
+
+    return copy;
+}
diff --git a/src/pulsecore/idxset.h b/src/pulsecore/idxset.h
index a6179fcf..d1e68c5c 100644
--- a/src/pulsecore/idxset.h
+++ b/src/pulsecore/idxset.h
@@ -103,6 +103,9 @@ unsigned pa_idxset_size(pa_idxset*s);
 /* Return TRUE of the idxset is empty */
 pa_bool_t pa_idxset_isempty(pa_idxset *s);
 
+/* Duplicate the idxset. This will not copy the actual indexes */
+pa_idxset *pa_idxset_copy(pa_idxset *s);
+
 /* A macro to ease iteration through all entries */
 #define PA_IDXSET_FOREACH(e, s, idx) \
     for ((e) = pa_idxset_first((s), &(idx)); (e); (e) = pa_idxset_next((s), &(idx)))