/* Return the lowercase mapping of a string.
The nf argument identifies the normalization form to apply after the
case-mapping. It can also be NULL, for no normalization. */
extern uint8_t *
u8_tolower (const uint8_t *s, size_t n, const char *iso639_language,
/* Return the lowercase mapping of a string.
The nf argument identifies the normalization form to apply after the
case-mapping. It can also be NULL, for no normalization. */
extern uint8_t *
u8_tolower (const uint8_t *s, size_t n, const char *iso639_language,