int iovw_put(struct iovec_wrapper *iovw, void* data, size_t len);
void iovw_free_contents(struct iovec_wrapper *iovw);
size_t iovw_size(struct iovec_wrapper *iovw);
+void iovw_rebase(struct iovec_wrapper *iovw, char *old, char *new);
typedef struct Writer {
JournalFile *journal;