1 files changed, 4 insertions, 0 deletions
diff --git a/src/chunked.hh b/src/chunked.hh
index 66d3ae7..511ae55 100644
--- a/src/chunked.hh
+++ b/src/chunked.hh
@@ -4,12 +4,16 @@
 #define CHUNKED_HH
 
 #include <cstddef>
+#include <functional>
 
 class Chunked {
 public:
   virtual ~Chunked() { }
 
+  typedef std::function<void(void const* data, size_t avail)> DataCallback;
+
   static Chunked* create();
+  static Chunked* create(DataCallback const& callback);
 
   virtual size_t add(void const* data, size_t avail) = 0;
   virtual bool good() const = 0;