idna_to_ascii_4i(3) libidn idna_to_ascii_4i(3)
NAME
idna_to_ascii_4i - API function
SYNOPSIS
#include <idna.h>
idna_to_ascii_4i(3) uint32_t * in, size_t inlen, char * out, int
flags);
ARGUMENTS
const uint32_t * in
input array with unicode code points.
size_t inlen
length of input array with unicode code points.
char * out output zero terminated string that must have room for at
least 63 characters plus the terminating zero.
int flags an Idna_flags value, e.g., IDNA_ALLOW_UNASSIGNED or
IDNA_USE_STD3_ASCII_RULES.
DESCRIPTION
The ToASCII operation takes a sequence of Unicode code points that make
up one domain label and transforms it into a sequence of code points in
the ASCII range (0..7F). If ToASCII succeeds, the original sequence and
the resulting sequence are equivalent labels.
It is important to note that the ToASCII operation can fail. ToASCII
fails if any step of it fails. If any step of the ToASCII operation fails
on any label in a domain name, that domain name MUST NOT be used as an
internationalized domain name. The method for deadling with this failure
is application-specific.
The inputs to ToASCII are a sequence of code points, the AllowUnassigned
flag, and the UseSTD3ASCIIRules flag. The output of ToASCII is either a
sequence of ASCII code points or a failure condition.
ToASCII never alters a sequence of code points that are all in the ASCII
range to begin with (although it could fail). Applying the ToASCII
operation multiple times has exactly the same effect as applying it just
once.
Return value: Returns 0 on success, or an Idna_rc 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 (C) 2002-2022 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/
libidn 1.41 idna_to_ascii_4i(3)
libidn 1.41 - Generated Sun Aug 28 06:19:36 CDT 2022