stringprep\_unichar\_to\_utf8(3) libidn stringprep\_unichar\_to\_utf8(3)

# [NAME](#NAME)

stringprep\_unichar\_to\_utf8 - API function

# [SYNOPSIS](#SYNOPSIS)

**#include <stringprep.h>**

**int stringprep\_unichar\_to\_utf8(uint32\_t c, char * outbuf);**

# [ARGUMENTS](#ARGUMENTS)

[uint32\_t c](#uint32_t)

a ISO10646 character code

[char * outbuf](#char)

output buffer, must have at least 6 bytes of space. If **NULL**, the length will be computed and returned and nothing will be written to *outbuf* .

# [DESCRIPTION](#DESCRIPTION)

Converts a single character to UTF-8.

Return value: number of bytes written.

# [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: stringprep_unichar_to_utf8(3) from libidn 1.44-r3 (Chainguard OS)
Source: https://gitlab.com/libidn/libidn