1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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13 .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
16 .TH ISWCNTRL 3 2021-03-22 "GNU" "Linux Programmer's Manual"
18 iswcntrl \- test for control wide character
21 .B #include <wctype.h>
23 .BI "int iswcntrl(wint_t " wc );
28 function is the wide-character equivalent of the
34 belonging to the wide-character class "cntrl".
36 The wide-character class "cntrl" is disjoint from the wide-character class
37 "print" and therefore also disjoint from its subclasses "graph", "alpha",
38 "upper", "lower", "digit", "xdigit", "punct".
44 .IR iswcntrl(btowc(c)) ,
49 function returns nonzero if
52 wide character belonging to the wide-character class "cntrl".
53 Otherwise, it returns zero.
55 For an explanation of the terms used in this section, see
63 Interface Attribute Value
66 T} Thread safety MT-Safe locale
72 POSIX.1-2001, POSIX.1-2008, C99.