iswcntrl — test for control wide character
#include <wctype.h>
int
iswcntrl( |
wint_t | wc); |
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.
The iswcntrl() function
returns non-zero if wc is a wide character
belonging to the wide-character class "cntrl". Otherwise it
returns zero.
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