1 files changed, 30 insertions, 0 deletions
diff --git a/src/common/CDC.h b/src/common/CDC.h
new file mode 100644
index 000000000..5c4273a08
--- /dev/null
+++ b/src/common/CDC.h
@@ -0,0 +1,30 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <vector>
+#include <string>
+
+#include "include/types.h"
+#include "include/buffer.h"
+
+class CDC {
+public:
+  virtual ~CDC() = default;
+
+  /// calculate chunk boundaries as vector of (offset, length) pairs
+  virtual void calc_chunks(
+    const bufferlist& inputdata,
+    std::vector<std::pair<uint64_t, uint64_t>> *chunks) const = 0;
+
+  /// set target chunk size as a power of 2, and number of bits for hard min/max
+  virtual void set_target_bits(int bits, int windowbits = 2) = 0;
+
+  static std::unique_ptr<CDC> create(
+    const std::string& type,
+    int bits,
+    int windowbits = 0);
+};
+
+void generate_buffer(int size, bufferlist *outbl, int seed = 0);