---
name: "pr29_4z"
section: "3"
platform: "linux"
package: "libidn"
version: "1.44-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/pr29_4z"
---

# pr29\_4z(3)

API function

## NAME

pr29\_4z - API function

## SYNOPSIS

**#include \<pr29.h\>**

**int pr29\_4z(const uint32\_t \*** *in***);**

## ARGUMENTS

- const uint32\_t \* in

  zero terminated array of Unicode code points.

## 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).

## 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/**