Manpages - iswcntrl.3

Table of Contents

NAME

iswcntrl - test for control wide character

SYNOPSIS

  #include <wctype.h>

  int iswcntrl(wint_t wc);

DESCRIPTION

The *iswcntrl*() function is the wide-character equivalent of the *iscntrl*(3) 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

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

ATTRIBUTES

For an explanation of the terms used in this section, see *attributes*(7).

Interface Attribute Value
*iswcntrl*() Thread safety MT-Safe locale

CONFORMING TO

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

NOTES

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

SEE ALSO

*iscntrl*(3), *iswctype*(3)

COLOPHON

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Author: dt

Created: 2022-02-20 Sun 16:21