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(): _XOPEN_SOURCE >= 600 || _ISOC99_SOURCE; or cc -std=c99
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DESCRIPTION

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

34       The iswblank() function returns non-zero if  wc  is  a  wide  character
35       belonging  to  the  wide-character class "blank".  Otherwise it returns
36       zero.
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CONFORMING TO

39       POSIX.1-2001.
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NOTES

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

46       isblank(3), iswctype(3)
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COLOPHON

49       This  page  is  part of release 3.22 of the Linux man-pages project.  A
50       description of the project, and information about reporting  bugs,  can
51       be found at http://www.kernel.org/doc/man-pages/.
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55GNU                               2007-07-26                       ISWBLANK(3)
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