pr29\_8z(3) libidn pr29\_8z(3)

# [NAME](#NAME)

pr29\_8z - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <pr29.h>**

**int pr29\_8z(const char * in);**

# [ARGUMENTS](#ARGUMENTS)

[const char * in](#const)

zero terminated input UTF-8 string.

# [DESCRIPTION](#DESCRIPTION)

Check the input to see if it may be normalized into different strings by different NFKC implementations, due to an anomaly in the NFKC specifications.

Return value: Returns the **Pr29\_rc** value **PR29\_SUCCESS** on success, and **PR29\_PROBLEM** if the input sequence is a "problem sequence" (i.e., may be normalized into different strings by different implementations), or **PR29\_STRINGPREP\_ERROR** if there was a problem converting the string from UTF-8 to UCS-4.

# [REPORTING BUGS](#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)

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](#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/**

1.44 libidn

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Document: pr29_8z(3) from libidn 1.44-r3 (Chainguard OS)
Source: https://gitlab.com/libidn/libidn