iswcntrl(3)

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

6       iswcntrl - test for control wide character
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SYNOPSIS

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

14       The  iswcntrl()  function is the wide-character equivalent of the iscn‐
15       trl(3) function.  It tests whether wc is a wide character belonging  to
16       the wide-character class "cntrl".
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18       The  wide-character  class  "cntrl" is disjoint from the wide-character
19       class "print" and therefore also disjoint from its subclasses  "graph",
20       "alpha", "upper", "lower", "digit", "xdigit", "punct".
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22       For  an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)), but not
23       vice versa.
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RETURN VALUE

26       The iswcntrl() function returns nonzero  if  wc  is  a  wide  character
27       belonging  to  the wide-character class "cntrl".  Otherwise, it returns
28       zero.
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ATTRIBUTES

31       For  an  explanation  of  the  terms  used   in   this   section,   see
32       attributes(7).
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34       ┌───────────┬───────────────┬────────────────┐
35       │Interface  │ Attribute     │ Value          │
36       ├───────────┼───────────────┼────────────────┤
37       │iswcntrl() │ Thread safety │ MT-Safe locale │
38       └───────────┴───────────────┴────────────────┘

CONFORMING TO

40       POSIX.1-2001, POSIX.1-2008, C99.
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NOTES

43       The behavior of iswcntrl() depends on the LC_CTYPE category of the cur‐
44       rent locale.
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COLOPHON

50       This page is part of release 4.15 of the Linux  man-pages  project.   A
51       description  of  the project, information about reporting bugs, and the
52       latest    version    of    this    page,    can     be     found     at
53       https://www.kernel.org/doc/man-pages/.
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57GNU                               2015-08-08                       ISWCNTRL(3)