1ISWBLANK(P)                POSIX Programmer's Manual               ISWBLANK(P)
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NAME

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

9       #include <wctype.h>
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11       int iswblank(wint_t wc);
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DESCRIPTION

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

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

30       No errors are defined.
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32       The following sections are informative.
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EXAMPLES

35       None.
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APPLICATION USAGE

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

43       None.
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FUTURE DIRECTIONS

46       None.
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SEE ALSO

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