stringprep_4i man page

stringprep_4i — API function


#include <stringprep.h>

int stringprep_4i(uint32_t * ucs4, size_t * len, size_t maxucs4len, Stringprep_profile_flags flags, const Stringprep_profile * profile);


uint32_t * ucs4

input/output array with string to prepare.

size_t * len

on input, length of input array with Unicode code points, on exit, length of output array with Unicode code points.

size_t maxucs4len

maximum length of input/output array.

Stringprep_profile_flags flags

a Stringprep_profile_flags value, or 0.

const Stringprep_profile * profile

pointer to Stringprep_profile to use.


Prepare the input UCS-4 string according to the stringprep profile, and write back the result to the input string.

The input is not required to be zero terminated ( ucs4 [ len ] = 0). The output will not be zero terminated unless  ucs4 [ len ] = 0. Instead, see stringprep_4zi() if your input is zero terminated or if you want the output to be.

Since the stringprep operation can expand the string,  maxucs4len indicate how large the buffer holding the string is.  This function will not read or write to code points outside that size.

The  flags are one of Stringprep_profile_flags values, or 0.

The  profile contain the Stringprep_profile instructions to perform.  Your application can define new profiles, possibly re-using the generic stringprep tables that always will be part of the library, or use one of the currently supported profiles.

Return value: Returns STRINGPREP_OK iff successful, or an Stringprep_rc error code.

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