iswcntrl(3)

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
27       belonging  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
32       attributes(7).
33
34       ┌───────────┬───────────────┬────────────────┐
35       │Interface  │ Attribute     │ Value          │
36       ├───────────┼───────────────┼────────────────┤
37       │iswcntrl() │ Thread safety │ MT-Safe locale │
38       └───────────┴───────────────┴────────────────┘

CONFORMING TO

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

NOTES

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

COLOPHON

50       This page is part of release 5.02 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/.
54
55
56
57GNU                               2015-08-08                       ISWCNTRL(3)