1 files changed, 39 insertions, 0 deletions
diff --git a/set.h b/set.h
new file mode 100644
index 0000000000..9aefdbcb56
--- /dev/null
+++ b/set.h
@@ -0,0 +1,39 @@
+/*-*- Mode: C; c-basic-offset: 8 -*-*/
+
+#ifndef foosethfoo
+#define foosethfoo
+
+/* Pretty straightforward set implementation. Internally based on the
+ * hashmap. That means that as a minor optimization a NULL set
+ * object will be treated as empty set for all read
+ * operations. That way it is not necessary to instantiate an object
+ * for each set use. */
+
+#include "hashmap.h"
+
+typedef struct Set Set;
+
+Set *set_new(hash_func_t hash_func, compare_func_t compare_func);
+void set_free(Set* set);
+
+int set_put(Set *s, void *value);
+void *set_get(Set *s, void *value);
+void *set_remove(Set *s, void *value);
+
+unsigned set_size(Set *s);
+bool set_isempty(Set *s);
+
+void *set_iterate(Set *h, void **state);
+void *set_iterate_backwards(Set *h, void **state);
+
+void *set_steal_first(Set *h);
+void* set_first(Set *h);
+void* set_last(Set *h);
+
+#define SET_FOREACH(e, s, state) \
+        for ((state) = NULL, (e) = set_iterate((s), &(state)); (e); (e) = set_iterate((s), &(state)))
+
+#define SET_FOREACH_BACKWARDS(e, s, state) \
+        for ((state) = NULL, (e) = set_iterate_backwards((s), &(state)); (e); (e) = set_iterate_backwards((s), &(state)))
+
+#endif