stringprep(3)

NAME
stringprep - API function

SYNOPSIS
#include <stringprep.h>

int stringprep(char * in, size_t maxlen, Stringprep_profile_flags flags, const Stringprep_profile * profile);

ARGUMENTS

char * in
    input/output array with string to prepare.

size_t maxlen
    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.

DESCRIPTION
Prepare the input zero terminated UTF-8 string according to the stringprep profile, and write back the result to the input string. Note that you must convert strings entered in the systems locale into UTF-8 before using this function, see stringprep_locale_to_utf8(). Since the stringprep operation can expand the string, maxlen indicate how large the buffer holding the string is. This function will not read or write to characters 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 reusing 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 error code.

REPORTING BUGS
Report bugs to <help-libidn@gnu.org>.
General guidelines for reporting bugs: https://www.gnu.org/gethelp/
GNU Libidn home page: https://www.gnu.org/software/libidn/

COPYRIGHT
Copyright © 2002-2026 Simon Josefsson.
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved.

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:

    https://www.gnu.org/software/libidn/manual/