Man Linux: Main Page and Category List

NAME

       iswblank - test for whitespace wide character

SYNOPSIS

       #include <wctype.h>

       int iswblank(wint_t wc);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

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

DESCRIPTION

       The  iswblank()  function  is  the  wide-character  equivalent  of  the
       isblank(3) function.  It tests whether wc is a wide character belonging
       to the wide-character class "blank".

       The  wide-character  class  "blank" is a subclass of the wide-character
       class "space".

       Being a  subclass  of  the  wide-character  class  "space",  the  wide-
       character  class  "blank"  is  disjoint  from  the wide-character class
       "graph" and  therefore  also  disjoint  from  its  subclasses  "alnum",
       "alpha", "upper", "lower", "digit", "xdigit", "punct".

       The  wide-character  class  "blank"  always contains at least the space
       character and the control character '\t'.

RETURN VALUE

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

CONFORMING TO

       POSIX.1-2001.

NOTES

       The behavior of iswblank() depends on  the  LC_CTYPE  category  of  the
       current locale.

SEE ALSO

       isblank(3), iswctype(3)

COLOPHON

       This  page  is  part of release 3.24 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.