@subheading stringprep_ucs4_nfkc_normalize
@anchor{stringprep_ucs4_nfkc_normalize}
@deftypefun {uint32_t *} {stringprep_ucs4_nfkc_normalize} (const uint32_t * @var{str}, ssize_t @var{len})
@var{str}: a Unicode string.

@var{len}: length of  @code{str} array, or -1 if  @code{str} is nul-terminated.

Converts a UCS4 string into canonical form, see
@code{stringprep_utf8_nfkc_normalize()}  for more information.

Return value: a newly allocated Unicode string, that is the NFKC
normalized form of  @code{str} .
@end deftypefun

