-int fileio_read(fileio_t *fileio,
- uint32_t size, uint8_t *buffer, uint32_t *size_read);
-int fileio_write(fileio_t *fileio,
- uint32_t size, const uint8_t *buffer, uint32_t *size_written);
+int fileio_read(struct fileio *fileio,
+ size_t size, void *buffer, size_t *size_read);
+int fileio_write(struct fileio *fileio,
+ size_t size, const void *buffer, size_t *size_written);