1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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11 .\" GNU glibc-2 source code and manual
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16 .TH ISWCNTRL 3 1999-07-25 "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
31 It tests whether \fIwc\fP is a wide character
32 belonging to the wide-character class "cntrl".
34 The wide-character class "cntrl" is disjoint from the wide-character class
35 "print" and therefore also disjoint from its subclasses "graph", "alpha",
36 "upper", "lower", "digit", "xdigit", "punct".
38 For an unsigned char \fIc\fP, \fIiscntrl(c)\fP
39 implies \fIiswcntrl(btowc(c))\fP,
44 function returns nonzero if \fIwc\fP is a
45 wide character belonging to the wide-character class "cntrl".
46 Otherwise it returns zero.