mtbl_sys::mtbl_merger_options_set_merge_func

pub unsafe extern fn mtbl_merger_options_set_merge_func(options: *mut mtbl_merger_options, merge_func: extern fn(clos: *mut c_void, key: *const u8, len_key: size_t, val0: *const u8, len_val0: size_t, val1: *const u8, len_val1: size_t, merged_val: *mut *mut u8, len_merged_val: *mut size_t), clos: *mut c_void)