1punycode_decode(3)                  libidn                  punycode_decode(3)
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NAME

6       punycode_decode - API function
7

SYNOPSIS

9       #include <punycode.h>
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11       int  punycode_decode(size_t input_length, const char [] input, size_t *
12       output_length, punycode_uint [] output, unsigned char [] case_flags);
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ARGUMENTS

15       size_t input_length
16                   The number of ASCII code points in the  input array.
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18       const char [] input
19                   An array of ASCII code points (0..7F).
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21       size_t * output_length
22                   The caller passes in the maximum number of code points that
23                   it  can  receive  into the  output array (which is also the
24                   maximum number of flags that it can receive into the
25                    case_flags array, if  case_flags is not a  NULL  pointer).
26                   On  successful  return  it  will contain the number of code
27                   points actually output (which is also the number  of  flags
28                   actually output, if case_flags is not a null pointer).  The
29                   decoder will never need to output more code points than the
30                   number  of  ASCII  code points in the input, because of the
31                   way the encoding is defined.  The  number  of  code  points
32                   output  cannot exceed the maximum possible value of a puny‐
33                   code_uint, even if the supplied
34                    output_length is greater than that.
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36       punycode_uint [] output
37                   An array of code points like the input  argument  of  puny‐
38                   code_encode() (see above).
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40       unsigned char [] case_flags
41                   A  NULL pointer (if the flags are not needed by the caller)
42                   or an array of boolean values parallel to the   output  ar‐
43                   ray.  Nonzero (true, flagged) suggests that the correspond‐
44                   ing Unicode character be forced to uppercase by the  caller
45                   (if possible), and zero (false, unflagged) suggests that it
46                   be forced to lowercase (if possible).   ASCII  code  points
47                   (0..7F)  are  output  already in the proper case, but their
48                   flags will be set appropriately so that applying the  flags
49                   would be harmless.
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DESCRIPTION

52       Converts  Punycode to a sequence of code points (presumed to be Unicode
53       code points).
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55       Return value: The return value can be any of the Punycode_status values
56       defined above.  If not PUNYCODE_SUCCESS, then
57        output_length ,  output , and  case_flags might contain garbage.
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REPORTING BUGS

60       Report bugs to <help-libidn@gnu.org>.
61       General guidelines for reporting bugs: http://www.gnu.org/gethelp/
62       GNU Libidn home page: http://www.gnu.org/software/libidn/
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64

66       Copyright © 2002-2021 Simon Josefsson.
67       Copying  and  distribution  of this file, with or without modification,
68       are permitted in any medium without royalty provided the copyright  no‐
69       tice and this notice are preserved.
70

SEE ALSO

72       The  full  documentation  for libidn is maintained as a Texinfo manual.
73       If the info and libidn programs are properly installed  at  your  site,
74       the command
75
76              info libidn
77
78       should  give  you access to the complete manual.  As an alternative you
79       may obtain the manual from:
80
81              http://www.gnu.org/software/libidn/manual/
82
83libidn                               1.38                   punycode_decode(3)
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