diff -r 24cc2969abae -r fa0ddd5e8fff contrib/fuzz/fuzzutil.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contrib/fuzz/fuzzutil.h	Sat Apr 28 22:18:50 2018 -0400
@@ -0,0 +1,24 @@
+#ifndef CONTRIB_FUZZ_FUZZUTIL_H
+#define CONTRIB_FUZZ_FUZZUTIL_H
+#include <iostream>
+#include <memory>
+#include <optional>
+#include <stdint.h>
+
+/* set DEBUG to 1 for a few debugging prints, or 2 for a lot */
+#define DEBUG 0
+#define LOG(level)                                                             \
+	if (level <= DEBUG)                                                    \
+	std::cout
+
+struct two_inputs {
+	std::unique_ptr<char[]> right;
+	size_t right_size;
+	std::unique_ptr<char[]> left;
+	size_t left_size;
+};
+
+/* Split a non-zero-length input into two inputs. */
+std::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size);
+
+#endif /* CONTRIB_FUZZ_FUZZUTIL_H */