1ISWBLANK(3)                Linux Programmer's Manual               ISWBLANK(3)
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NAME

6       iswblank - test for whitespace wide character
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SYNOPSIS

9       #include <wctype.h>
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11       int iswblank(wint_t wc);
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13   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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15       iswblank():
16              _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE ||
17              _POSIX_C_SOURCE >= 200112L;
18              or cc -std=c99
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DESCRIPTION

21       The  iswblank()  function  is  the  wide-character  equivalent  of  the
22       isblank(3) function.  It tests whether wc is a wide character belonging
23       to the wide-character class "blank".
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25       The wide-character class "blank" is a subclass  of  the  wide-character
26       class "space".
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28       Being  a subclass of the wide-character class "space", the wide-charac‐
29       ter class "blank" is disjoint from the wide-character class "graph" and
30       therefore  also disjoint from its subclasses "alnum", "alpha", "upper",
31       "lower", "digit", "xdigit", "punct".
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33       The wide-character class "blank" always contains  at  least  the  space
34       character and the control character '\t'.
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RETURN VALUE

37       The  iswblank()  function  returns  nonzero  if  wc is a wide character
38       belonging to the wide-character class "blank".   Otherwise  it  returns
39       zero.
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CONFORMING TO

42       POSIX.1-2001.
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NOTES

45       The behavior of iswblank() depends on the LC_CTYPE category of the cur‐
46       rent locale.
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SEE ALSO

49       isblank(3), iswctype(3)
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COLOPHON

52       This page is part of release 3.53 of the Linux  man-pages  project.   A
53       description  of  the project, and information about reporting bugs, can
54       be found at http://www.kernel.org/doc/man-pages/.
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58GNU                               2010-09-20                       ISWBLANK(3)
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