1 files changed, 37 insertions, 0 deletions
diff --git a/src/compare.h b/src/compare.h
new file mode 100644
index 00000000..f4dbc046
--- /dev/null
+++ b/src/compare.h
@@ -0,0 +1,37 @@
+// Copyright 2011-2021 David Robillard <d@drobilla.net>
+// SPDX-License-Identifier: ISC
+
+#ifndef SERD_SRC_COMPARE_H
+#define SERD_SRC_COMPARE_H
+
+#include "zix/attributes.h"
+
+/// Compare statements lexicographically, ignoring graph
+ZIX_PURE_FUNC int
+serd_triple_compare(const void* x, const void* y, const void* user_data);
+
+/**
+   Compare statments with statement patterns lexicographically, ignoring graph.
+
+   Null nodes in the second argument are treated as wildcards, always less than
+   any node.
+*/
+ZIX_PURE_FUNC int
+serd_triple_compare_pattern(const void* x,
+                            const void* y,
+                            const void* user_data);
+
+/// Compare statements lexicographically
+ZIX_PURE_FUNC int
+serd_quad_compare(const void* x, const void* y, const void* user_data);
+
+/**
+   Compare statments with statement patterns lexicographically.
+
+   Null nodes in the second argument are treated as wildcards, always less than
+   any node.
+*/
+ZIX_PURE_FUNC int
+serd_quad_compare_pattern(const void* x, const void* y, const void* user_data);
+
+#endif // ZIX_SRC_COMPARE_H