stringprep_utf8_to_ucs4 man page

stringprep_utf8_to_ucs4 — API function


#include <stringprep.h>

uint32_t * stringprep_utf8_to_ucs4(const char * str, ssize_t len, size_t * items_written);


const char * str

a UTF-8 encoded string

ssize_t len

the maximum length of  str to use. If  len < 0, then the string is nul-terminated.

size_t * items_written

location to store the number of characters in the result, or NULL.


Convert a string from UTF-8 to a 32-bit fixed width representation as UCS-4.  The function now performs error checking to verify that the input is valid UTF-8 (before it was documented to not do error checking).

Return value: a pointer to a newly allocated UCS-4 string. This value must be deallocated by the caller.

Reporting Bugs

Report bugs to <>.
General guidelines for reporting bugs:
GNU Libidn home page:

See Also

The full documentation for libidn is maintained as a Texinfo manual.  If the info and libidn programs are properly installed at your site, the command

info libidn

should give you access to the complete manual. As an alternative you may obtain the manual from:


1.33 libidn