man3/iswxdigit.3

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   2 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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   9 .\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
  10 .\"   ISO/IEC 9899:1999
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  12 .TH iswxdigit 3 (date) "Linux man-pages (unreleased)"
  13 .SH NAME
  14 iswxdigit \- test for hexadecimal digit wide character
  15 .SH LIBRARY
  16 Standard C library
  17 .RI ( libc ", " \-lc )
  18 .SH SYNOPSIS
  19 .nf
  20 .B #include <wctype.h>
  21 .PP
  22 .BI "int iswxdigit(wint_t " wc );
  23 .fi
  24 .SH DESCRIPTION
  25 The
  26 .BR iswxdigit ()
  27 function is the wide-character equivalent of the
  28 .BR isxdigit (3)
  29 function.
  30 It tests whether
  31 .I wc
  32 is a wide character
  33 belonging to the wide-character class "xdigit".
  34 .PP
  35 The wide-character class "xdigit" is a subclass of the wide-character class
  36 "alnum", and therefore also a subclass of the wide-character class "graph" and
  37 of the wide-character class "print".
  38 .PP
  39 Being a subclass of the wide-character class "print", the wide-character class
  40 "xdigit" is disjoint from the wide-character class "cntrl".
  41 .PP
  42 Being a subclass of the wide-character class "graph", the wide-character class
  43 "xdigit" is disjoint from the wide-character class "space" and its subclass
  44 "blank".
  45 .PP
  46 Being a subclass of the wide-character class "alnum", the wide-character class
  47 "xdigit" is disjoint from the wide-character class "punct".
  48 .PP
  49 The wide-character class "xdigit" always contains at least the
  50 letters \[aq]A\[aq] to \[aq]F\[aq], \[aq]a\[aq] to \[aq]f\[aq]
  51 and the digits \[aq]0\[aq] to \[aq]9\[aq].
  52 .SH RETURN VALUE
  53 The
  54 .BR iswxdigit ()
  55 function returns nonzero if
  56 .I wc
  57 is a wide character
  58 belonging to the wide-character class "xdigit".
  59 Otherwise, it returns zero.
  60 .SH ATTRIBUTES
  61 For an explanation of the terms used in this section, see
  62 .BR attributes (7).
  63 .ad l
  64 .nh
  65 .TS
  66 allbox;
  67 lbx lb lb
  68 l l l.
  69 Interface       Attribute       Value
  70 T{
  71 .BR iswxdigit ()
  72 T}      Thread safety   MT-Safe locale
  73 .TE
  74 .hy
  75 .ad
  76 .sp 1
  77 .SH STANDARDS
  78 C11, POSIX.1-2008.
  79 .SH HISTORY
  80 POSIX.1-2001, C99.
  81 .SH NOTES
  82 The behavior of
  83 .BR iswxdigit ()
  84 depends on the
  85 .B LC_CTYPE
  86 category of the
  87 current locale.
  88 .SH SEE ALSO
  89 .BR iswctype (3),
  90 .BR isxdigit (3)