ISWCNTRL(3) Linux Programmer's Manual ISWCNTRL(3)NAMEiswcntrl - 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 iscn‐
trl() 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
C99.
SEE ALSOiscntrl(3), iswctype(3)NOTES
The behaviour of iswcntrl() depends on the LC_CTYPE category of the
current locale.
GNU 1999-07-25 ISWCNTRL(3)