iswcntrl(3) - Linux manual page (original) (raw)

iswcntrl(3) Library Functions Manual iswcntrl(3)

NAME top

   iswcntrl - test for control wide character

LIBRARY top

   Standard C library (_libc_, _-lc_)

SYNOPSIS top

   **#include <wctype.h>**

   **int iswcntrl(wint_t** _wc_**);**

DESCRIPTION top

   The **iswcntrl**() function is the wide-character equivalent of the
   [iscntrl(3)](../man3/iscntrl.3.html) function.  It tests whether _wc_ is a wide character
   belonging to the wide-character class "cntrl".

   The wide-character class "cntrl" is disjoint from the wide-
   character class "print" and therefore also disjoint from its
   subclasses "graph", "alpha", "upper", "lower", "digit", "xdigit",
   "punct".

   For an unsigned char _c_, _iscntrl(c)_ implies _iswcntrl(btowc(c))_, but
   not vice versa.

RETURN VALUE top

   The **iswcntrl**() function returns nonzero if _wc_ is a wide character
   belonging to the wide-character class "cntrl".  Otherwise, it
   returns zero.

ATTRIBUTES top

   For an explanation of the terms used in this section, see
   [attributes(7)](../man7/attributes.7.html).
   ┌───────────────────────────────┬───────────────┬────────────────┐
   │ **Interface** │ **Attribute** │ **Value** │
   ├───────────────────────────────┼───────────────┼────────────────┤
   │ **iswcntrl**()                    │ Thread safety │ MT-Safe locale │
   └───────────────────────────────┴───────────────┴────────────────┘

STANDARDS top

   C11, POSIX.1-2008.

HISTORY top

   POSIX.1-2001, C99.

NOTES top

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

SEE ALSO top

   [iscntrl(3)](../man3/iscntrl.3.html), [iswctype(3)](../man3/iswctype.3.html)

COLOPHON top

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Linux man-pages 6.10 2024-07-23 iswcntrl(3)

Pages that refer to this page:isalpha(3), iswctype(3)