man3/iswxdigit.3

   1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
   2 .\"
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   8 .\" References consulted:
   9 .\"   GNU glibc-2 source code and manual
  10 .\"   Dinkumware C library reference http://www.dinkumware.com/
  11 .\"   OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
  12 .\"   ISO/IEC 9899:1999
  13 .\"
  14 .TH ISWXDIGIT 3  1999-07-25 "GNU" "Linux Programmer's Manual"
  15 .SH NAME
  16 iswxdigit \- test for hexadecimal digit wide character
  17 .SH SYNOPSIS
  18 .nf
  19 .B #include <wctype.h>
  20 .sp
  21 .BI "int iswxdigit(wint_t " wc );
  22 .fi
  23 .SH DESCRIPTION
  24 The \fBiswxdigit\fP function is the wide-character equivalent of the
  25 \fBisxdigit\fP function. It tests whether \fIwc\fP is a wide character
  26 belonging to the wide character class "xdigit".
  27 .PP
  28 The wide character class "xdigit" is a subclass of the wide character class
  29 "alnum", and therefore also a subclass of the wide character class "graph" and
  30 of the wide character class "print".
  31 .PP
  32 Being a subclass of the wide character class "print", the wide character class
  33 "xdigit" is disjoint from the wide character class "cntrl".
  34 .PP
  35 Being a subclass of the wide character class "graph", the wide character class
  36 "xdigit" is disjoint from the wide character class "space" and its subclass
  37 "blank".
  38 .PP
  39 Being a subclass of the wide character class "alnum", the wide character class
  40 "xdigit" is disjoint from the wide character class "punct".
  41 .PP
  42 The wide character class "xdigit" always contains at least the letters 'A'
  43 to 'F', 'a' to 'f' and the digits '0' to '9'.
  44 .SH "RETURN VALUE"
  45 The \fBiswxdigit\fP function returns non-zero if \fIwc\fP is a wide character
  46 belonging to the wide character class "xdigit". Otherwise it returns zero.
  47 .SH "CONFORMING TO"
  48 ISO/ANSI C, UNIX98
  49 .SH "SEE ALSO"
  50 .BR iswctype (3),
  51 .BR isxdigit (3)
  52 .SH NOTES
  53 The behaviour of \fBiswxdigit\fP depends on the LC_CTYPE category of the
  54 current locale.