buffer: allow caller to initialize bufferhash state

Signed-off-by: Samuel Just <sam.just@inktank.com>

diff --git a/src/include/buffer.h b/src/include/buffer.h
index 4c275cacae9e284ad780b256fbca84cfd3e8c352..5491105f948747e5cfc48894295e0fc271e0219b 100644 (file)
--- a/src/include/buffer.h
+++ b/src/include/buffer.h
@@ -448,6 +448,7 @@ public:
 
   public:
     hash() : crc(0) { }
+    hash(uint32_t init) : crc(init) { }
 
     void update(buffer::list& bl) {
       crc = bl.crc32c(crc);