Tribblix: manual page: idna_to_ascii

idna_to_ascii_4i(3) libidn idna_to_ascii_4i(3)

NAME

idna_to_ascii_4i - API function

SYNOPSIS

#include <idna.h>

int idna_to_ascii_4i(const 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/

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