man3/iswgraph.3

   1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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  10 .\" References consulted:
  11 .\"   GNU glibc-2 source code and manual
  12 .\"   Dinkumware C library reference http://www.dinkumware.com/
  13 .\"   OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
  14 .\"   ISO/IEC 9899:1999
  15 .\"
  16 .TH ISWGRAPH 3  2015-08-08 "GNU" "Linux Programmer's Manual"
  17 .SH NAME
  18 iswgraph \- test for graphic wide character
  19 .SH SYNOPSIS
  20 .nf
  21 .B #include <wctype.h>
  22 .PP
  23 .BI "int iswgraph(wint_t " wc );
  24 .fi
  25 .SH DESCRIPTION
  26 The
  27 .BR iswgraph ()
  28 function is the wide-character equivalent of the
  29 .BR isgraph (3)
  30 function.
  31 It tests whether
  32 .I wc
  33 is a wide character
  34 belonging to the wide-character class "graph".
  35 .PP
  36 The wide-character class "graph" is a subclass of the wide-character class
  37 "print".
  38 .PP
  39 Being a subclass of the wide-character class "print",
  40 the wide-character class
  41 "graph" is disjoint from the wide-character class "cntrl".
  42 .PP
  43 The wide-character class "graph" is disjoint from the wide-character class
  44 "space" and therefore also disjoint from its subclass "blank".
  45 .\" Note: UNIX98 (susv2/xbd/locale.html) says that "graph" and "space" may
  46 .\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
  47 .\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
  48 .PP
  49 The wide-character class "graph" contains all the wide characters from the
  50 wide-character class "print" except the space character.
  51 It therefore contains
  52 the wide-character classes "alnum" and "punct".
  53 .SH RETURN VALUE
  54 The
  55 .BR iswgraph ()
  56 function returns nonzero
  57 if
  58 .I wc
  59 is a wide character
  60 belonging to the wide-character class "graph".
  61 Otherwise, it returns zero.
  62 .SH ATTRIBUTES
  63 For an explanation of the terms used in this section, see
  64 .BR attributes (7).
  65 .TS
  66 allbox;
  67 lb lb lb
  68 l l l.
  69 Interface       Attribute       Value
  70 T{
  71 .BR iswgraph ()
  72 T}      Thread safety   MT-Safe locale
  73 .TE
  74 .SH CONFORMING TO
  75 POSIX.1-2001, POSIX.1-2008, C99.
  76 .SH NOTES
  77 The behavior of
  78 .BR iswgraph ()
  79 depends on the
  80 .B LC_CTYPE
  81 category of the
  82 current locale.
  83 .SH SEE ALSO
  84 .BR isgraph (3),
  85 .BR iswctype (3)