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1 | .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
2 | .\" | |
89e3ffe9 | 3 | .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA) |
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4 | .\" This is free documentation; you can redistribute it and/or |
5 | .\" modify it under the terms of the GNU General Public License as | |
6 | .\" published by the Free Software Foundation; either version 2 of | |
7 | .\" the License, or (at your option) any later version. | |
fe382ebf | 8 | .\" %%%LICENSE_END |
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9 | .\" |
10 | .\" References consulted: | |
11 | .\" GNU glibc-2 source code and manual | |
12 | .\" Dinkumware C library reference http://www.dinkumware.com/ | |
008f1ecc | 13 | .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html |
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14 | .\" ISO/IEC 9899:1999 |
15 | .\" | |
460495ca | 16 | .TH ISWCNTRL 3 2015-08-08 "GNU" "Linux Programmer's Manual" |
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17 | .SH NAME |
18 | iswcntrl \- test for control wide character | |
19 | .SH SYNOPSIS | |
20 | .nf | |
21 | .B #include <wctype.h> | |
68e4db0a | 22 | .PP |
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23 | .BI "int iswcntrl(wint_t " wc ); |
24 | .fi | |
25 | .SH DESCRIPTION | |
60a90ecd MK |
26 | The |
27 | .BR iswcntrl () | |
28 | function is the wide-character equivalent of the | |
29 | .BR iscntrl (3) | |
30 | function. | |
35cfd378 MK |
31 | It tests whether |
32 | .I wc | |
33 | is a wide character | |
d0f17b57 | 34 | belonging to the wide-character class "cntrl". |
fea681da | 35 | .PP |
d0f17b57 | 36 | The wide-character class "cntrl" is disjoint from the wide-character class |
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37 | "print" and therefore also disjoint from its subclasses "graph", "alpha", |
38 | "upper", "lower", "digit", "xdigit", "punct". | |
39 | .PP | |
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40 | For an unsigned char |
41 | .IR c , | |
42 | .I iscntrl(c) | |
43 | implies | |
44 | .IR iswcntrl(btowc(c)) , | |
fea681da | 45 | but not vice versa. |
47297adb | 46 | .SH RETURN VALUE |
60a90ecd MK |
47 | The |
48 | .BR iswcntrl () | |
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49 | function returns nonzero if |
50 | .I wc | |
51 | is a | |
d0f17b57 | 52 | wide character belonging to the wide-character class "cntrl". |
2b9b829d | 53 | Otherwise, it returns zero. |
65126e61 | 54 | .SH ATTRIBUTES |
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55 | For an explanation of the terms used in this section, see |
56 | .BR attributes (7). | |
57 | .TS | |
58 | allbox; | |
59 | lb lb lb | |
60 | l l l. | |
61 | Interface Attribute Value | |
62 | T{ | |
65126e61 | 63 | .BR iswcntrl () |
249564d0 MK |
64 | T} Thread safety MT-Safe locale |
65 | .TE | |
47297adb | 66 | .SH CONFORMING TO |
d8ca300f | 67 | POSIX.1-2001, POSIX.1-2008, C99. |
fea681da | 68 | .SH NOTES |
d9bfdb9c | 69 | The behavior of |
60a90ecd | 70 | .BR iswcntrl () |
1274071a MK |
71 | depends on the |
72 | .B LC_CTYPE | |
73 | category of the | |
fea681da | 74 | current locale. |
47297adb | 75 | .SH SEE ALSO |
e37e3282 MK |
76 | .BR iscntrl (3), |
77 | .BR iswctype (3) |