Name
iswcntrl - test for control wide characterLibrary
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).Interface | Attribute | Value |
T} | Thread safety | MT-Safe locale |