Man page - iswcntrl(3)

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Manual

iswcntrl

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
RETURN VALUE
ATTRIBUTES
STANDARDS
HISTORY
NOTES
SEE ALSO

NAME

iswcntrl - test for control wide character

LIBRARY

Standard C library ( libc , -lc )

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).

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STANDARDS

C11, POSIX.1-2008.

HISTORY

POSIX.1-2001, C99.

NOTES

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

SEE ALSO

iscntrl (3), iswctype (3)