Function hurray_file_reader_kv_count 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn hurray_file_reader_kv_count(
    handle: *const HurrayFileReader,
    out_count: *mut u64,
) -> HurrayStatus

Writes the number of entries in the file’s KV metadata section.

Safety

handle and out_count MUST be valid, non-null pointers.