ISWCNTRLSection: Linux Programmer's Manual (3)
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NAMEiswcntrl - test for control wide character
#include <wctype.h> int iswcntrl(wint_t wc);
DESCRIPTIONThe 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".
RETURN VALUEThe iswcntrl() function returns non-zero if wc is a wide character belonging to the wide-character class "cntrl". Otherwise it returns zero.
NOTESThe behavior of iswcntrl() depends on the LC_CTYPE category of the current locale.
SEE ALSOiscntrl(3), iswctype(3)
COLOPHONThis page is part of release 3.21 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.