WIP: Add model

1 files changed, 21 insertions, 0 deletions

diff --git a/src/zix/btree.h b/src/zix/btree.h
index 46daa24a..0f71d1e3 100644
--- a/src/zix/btree.h
+++ b/src/zix/btree.h
@@ -126,6 +126,27 @@ ZIX_API ZixBTreeIter*
 zix_btree_begin(const ZixBTree* t);
 
 /**
+   Return an iterator to the end of `t` (one past the last element).
+
+   The returned iterator must be freed with zix_btree_iter_free().
+*/
+ZIX_API ZixBTreeIter*
+zix_btree_end(const ZixBTree* t);
+
+/**
+   Return a new copy of `i`.
+*/
+ZIX_API ZixBTreeIter*
+zix_btree_iter_copy(const ZixBTreeIter* const i);
+
+/**
+   Return true iff `lhs` is equal to `rhs`.
+*/
+ZIX_API bool
+zix_btree_iter_equals(const ZixBTreeIter* const lhs,
+                      const ZixBTreeIter* const rhs);
+
+/**
    Return true iff `i` is an iterator to the end of its tree.
 */
 ZIX_API bool