man3/iswspace.3

   1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
   2 .\"
   3 .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
   4 .\" This is free documentation; you can redistribute it and/or
   5 .\" modify it under the terms of the GNU General Public License as
   6 .\" published by the Free Software Foundation; either version 2 of
   7 .\" the License, or (at your option) any later version.
   8 .\" %%%LICENSE_END
   9 .\"
  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 ISWSPACE 3  2015-08-08 "GNU" "Linux Programmer's Manual"
  17 .SH NAME
  18 iswspace \- test for whitespace wide character
  19 .SH SYNOPSIS
  20 .nf
  21 .B #include <wctype.h>
  22 .PP
  23 .BI "int iswspace(wint_t " wc );
  24 .fi
  25 .SH DESCRIPTION
  26 The
  27 .BR iswspace ()
  28 function is the wide-character equivalent of the
  29 .BR isspace (3)
  30 function.
  31 It tests whether
  32 .I wc
  33 is a wide character
  34 belonging to the wide-character class "space".
  35 .PP
  36 The wide-character class "space" is disjoint from the wide-character class
  37 "graph" and therefore also disjoint from its subclasses "alnum", "alpha",
  38 "upper", "lower", "digit", "xdigit", "punct".
  39 .\" Note: UNIX98 (susv2/xbd/locale.html) says that "space" and "graph" may
  40 .\" have characters in common, except U+0020. But C99 (ISO/IEC 9899:1999
  41 .\" section 7.25.2.1.10) says that "space" and "graph" are disjoint.
  42 .PP
  43 The wide-character class "space" contains the wide-character class "blank".
  44 .PP
  45 The wide-character class "space" always contains at least the space character
  46 and the control
  47 characters \(aq\\f\(aq, \(aq\\n\(aq, \(aq\\r\(aq, \(aq\\t\(aq, \(aq\\v\(aq.
  48 .SH RETURN VALUE
  49 The
  50 .BR iswspace ()
  51 function returns nonzero if
  52 .I wc
  53 is a wide character
  54 belonging to the wide-character class "space".
  55 Otherwise, it returns zero.
  56 .SH ATTRIBUTES
  57 For an explanation of the terms used in this section, see
  58 .BR attributes (7).
  59 .TS
  60 allbox;
  61 lb lb lb
  62 l l l.
  63 Interface       Attribute       Value
  64 T{
  65 .BR iswspace ()
  66 T}      Thread safety   MT-Safe locale
  67 .TE
  68 .SH CONFORMING TO
  69 POSIX.1-2001, POSIX.1-2008, C99.
  70 .SH NOTES
  71 The behavior of
  72 .BR iswspace ()
  73 depends on the
  74 .B LC_CTYPE
  75 category of the
  76 current locale.
  77 .SH SEE ALSO
  78 .BR isspace (3),
  79 .BR iswctype (3)