1idna_to_ascii_4i(3)                 libidn                 idna_to_ascii_4i(3)
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3
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NAME

6       idna_to_ascii_4i - API function
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SYNOPSIS

9       #include <idna.h>
10
11       int idna_to_ascii_4i(const uint32_t * in, size_t inlen, char * out, int
12       flags);
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ARGUMENTS

15       const uint32_t * in
16                   input array with unicode code points.
17
18       size_t inlen
19                   length of input array with unicode code points.
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21       char * out  output zero terminated string that must have  room  for  at
22                   least 63 characters plus the terminating zero.
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24       int flags   an   Idna_flags   value,   e.g.,  IDNA_ALLOW_UNASSIGNED  or
25                   IDNA_USE_STD3_ASCII_RULES.
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DESCRIPTION

28       The ToASCII operation takes a sequence of Unicode code points that make
29       up one domain label and transforms it into a sequence of code points in
30       the ASCII range (0..7F). If ToASCII succeeds, the original sequence and
31       the resulting sequence are equivalent labels.
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33       It  is  important  to note that the ToASCII operation can fail. ToASCII
34       fails if any step of it fails. If any step  of  the  ToASCII  operation
35       fails  on any label in a domain name, that domain name MUST NOT be used
36       as an internationalized domain name. The method for deadling with  this
37       failure is application-specific.
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39       The  inputs  to  ToASCII  are a sequence of code points, the AllowUnas‐
40       signed flag, and the UseSTD3ASCIIRules flag. The output of  ToASCII  is
41       either a sequence of ASCII code points or a failure condition.
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43       ToASCII  never  alters  a  sequence  of code points that are all in the
44       ASCII range to begin  with  (although  it  could  fail).  Applying  the
45       ToASCII  operation multiple times has exactly the same effect as apply‐
46       ing it just once.
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48       Return value: Returns 0 on success, or an Idna_rc error code.
49

REPORTING BUGS

51       Report bugs to <help-libidn@gnu.org>.
52       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
53       GNU Libidn home page: http://www.gnu.org/software/libidn/
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55

57       Copyright © 2002-2021 Simon Josefsson.
58       Copying and distribution of this file, with  or  without  modification,
59       are  permitted in any medium without royalty provided the copyright no‐
60       tice and this notice are preserved.
61

SEE ALSO

63       The full documentation for libidn is maintained as  a  Texinfo  manual.
64       If  the  info  and libidn programs are properly installed at your site,
65       the command
66
67              info libidn
68
69       should give you access to the complete manual.  As an  alternative  you
70       may obtain the manual from:
71
72              http://www.gnu.org/software/libidn/manual/
73
74libidn                               1.38                  idna_to_ascii_4i(3)
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