1ISWCNTRL(3)                Linux Programmer's Manual               ISWCNTRL(3)
2
3
4

NAME

6       iswcntrl - test for control wide character
7

SYNOPSIS

9       #include <wctype.h>
10
11       int iswcntrl(wint_t wc);
12

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".
17
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".
21
22       For  an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)), but not
23       vice versa.
24

RETURN VALUE

26       The iswcntrl() function returns nonzero if wc is a wide  character  be‐
27       longing  to  the  wide-character  class "cntrl".  Otherwise, it returns
28       zero.
29

ATTRIBUTES

31       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
32       tributes(7).
33
34       ┌─────────────────────────────────────┬───────────────┬────────────────┐
35       │Interface                            │ Attribute     │ Value          │
36       ├─────────────────────────────────────┼───────────────┼────────────────┤
37       │iswcntrl()                           │ Thread safety │ MT-Safe locale │
38       └─────────────────────────────────────┴───────────────┴────────────────┘
39

CONFORMING TO

41       POSIX.1-2001, POSIX.1-2008, C99.
42

NOTES

44       The behavior of iswcntrl() depends on the LC_CTYPE category of the cur‐
45       rent locale.
46

SEE ALSO

48       iscntrl(3), iswctype(3)
49

COLOPHON

51       This page is part of release 5.13 of the Linux  man-pages  project.   A
52       description  of  the project, information about reporting bugs, and the
53       latest    version    of    this    page,    can     be     found     at
54       https://www.kernel.org/doc/man-pages/.
55
56
57
58GNU                               2021-03-22                       ISWCNTRL(3)
Impressum