Merge pull request #6769

b641e0a2c Add clear method to byte_stream (Lee Clagett)

contrib/epee/include/byte_stream.h

@@ -117,6 +117,9 @@ namespace epee
       check(more);
     }
 
+    //! Reset write position, but do not release internal memory. \post `size() == 0`.
+    void clear() noexcept { next_write_ = buffer_.get(); }
+
     /*! Copy `length` bytes starting at `ptr` to end of stream.
         \throw std::range_error If exceeding max size_t value.
         \throw std::bad_alloc If allocation fails. */