ISWCNTRL (3)
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 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 non-zero if wc is a wide character
belonging to the wide character class "cntrl". Otherwise it returns zero.
CONFORMING TO
SEE ALSO
NOTES
The behaviour of iswcntrl depends on the LC_CTYPE category of the
current locale.
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