1ISWBLANK(3P)               POSIX Programmer's Manual              ISWBLANK(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       iswblank - test for a blank wide-character code
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SYNOPSIS

15       #include <wctype.h>
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17       int iswblank(wint_t wc);
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DESCRIPTION

21       The iswblank() function shall test whether wc is a wide-character  code
22       representing  a  character  of  class  blank  in  the program's current
23       locale; see the Base Definitions volume of IEEE Std 1003.1-2001,  Chap‐
24       ter 7, Locale.
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26       The  wc  argument is a wint_t, the value of which the application shall
27       ensure is a wide-character code corresponding to a valid  character  in
28       the  current  locale,  or  equal to the value of the macro WEOF. If the
29       argument has any other value, the behavior is undefined.
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RETURN VALUE

32       The iswblank() function shall return non-zero if wc is  a  blank  wide-
33       character code; otherwise, it shall return 0.
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ERRORS

36       No errors are defined.
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38       The following sections are informative.
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EXAMPLES

41       None.
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APPLICATION USAGE

44       To  ensure  applications  portability,  especially  across natural lan‐
45       guages, only this function and those listed in  the  SEE  ALSO  section
46       should be used for classification of wide-character codes.
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RATIONALE

49       None.
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FUTURE DIRECTIONS

52       None.
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SEE ALSO

55       iswalnum(), iswalpha(), iswcntrl(), iswctype(), iswdigit(), iswgraph(),
56       iswlower(),    iswprint(),    iswpunct(),    iswspace(),    iswupper(),
57       iswxdigit(),    setlocale(),    the    Base   Definitions   volume   of
58       IEEE Std 1003.1-2001,  Chapter   7,   Locale,   <stdio.h>,   <wchar.h>,
59       <wctype.h>
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62       Portions  of  this text are reprinted and reproduced in electronic form
63       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
64       --  Portable  Operating  System  Interface (POSIX), The Open Group Base
65       Specifications Issue 6, Copyright (C) 2001-2003  by  the  Institute  of
66       Electrical  and  Electronics  Engineers, Inc and The Open Group. In the
67       event of any discrepancy between this version and the original IEEE and
68       The  Open Group Standard, the original IEEE and The Open Group Standard
69       is the referee document. The original Standard can be  obtained  online
70       at http://www.opengroup.org/unix/online.html .
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74IEEE/The Open Group                  2003                         ISWBLANK(3P)
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