]>
Commit | Line | Data |
---|---|---|
fea681da MK |
1 | .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
2 | .\" | |
89e3ffe9 | 3 | .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA) |
fea681da MK |
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 |
fea681da MK |
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 |
fea681da MK |
14 | .\" ISO/IEC 9899:1999 |
15 | .\" | |
0c3ad9ea | 16 | .TH ISWALNUM 3 2014-01-28 "GNU" "Linux Programmer's Manual" |
fea681da MK |
17 | .SH NAME |
18 | iswalnum \- test for alphanumeric wide character | |
19 | .SH SYNOPSIS | |
20 | .nf | |
21 | .B #include <wctype.h> | |
22 | .sp | |
23 | .BI "int iswalnum(wint_t " wc ); | |
24 | .fi | |
25 | .SH DESCRIPTION | |
60a90ecd MK |
26 | The |
27 | .BR iswalnum () | |
28 | function is the wide-character equivalent of the | |
3a72373c | 29 | .BR isalnum (3) |
60a90ecd | 30 | function. |
35cfd378 MK |
31 | It tests whether |
32 | .I wc | |
33 | is a wide character | |
d0f17b57 | 34 | belonging to the wide-character class "alnum". |
fea681da | 35 | .PP |
d0f17b57 MK |
36 | The wide-character class "alnum" is a subclass of the wide-character class |
37 | "graph", and therefore also a subclass of the wide-character class "print". | |
fea681da | 38 | .PP |
d0f17b57 MK |
39 | Being a subclass of the wide-character class "print", |
40 | the wide-character class | |
41 | "alnum" is disjoint from the wide-character class "cntrl". | |
fea681da | 42 | .PP |
d0f17b57 MK |
43 | Being a subclass of the wide-character class "graph", |
44 | the wide-character class "alnum" is disjoint from | |
45 | the wide-character class "space" and its subclass "blank". | |
fea681da | 46 | .PP |
d0f17b57 | 47 | The wide-character class "alnum" is disjoint from the wide-character class |
fea681da MK |
48 | "punct". |
49 | .PP | |
d0f17b57 | 50 | The wide-character class "alnum" is the union of the wide-character classes |
c13182ef | 51 | "alpha" and "digit". |
d0f17b57 | 52 | As such, it also contains the wide-character class |
fea681da MK |
53 | "xdigit". |
54 | .PP | |
f81fb444 MK |
55 | The wide-character class "alnum" always contains at least the letters \(aqA\(aq |
56 | to \(aqZ\(aq, \(aqa\(aq to \(aqz\(aq and the digits \(aq0\(aq to \(aq9\(aq. | |
47297adb | 57 | .SH RETURN VALUE |
60a90ecd MK |
58 | The |
59 | .BR iswalnum () | |
c7094399 | 60 | function returns nonzero |
35cfd378 MK |
61 | if |
62 | .I wc | |
63 | is a wide character | |
d0f17b57 | 64 | belonging to the wide-character class "alnum". |
2b9b829d | 65 | Otherwise, it returns zero. |
0c3ad9ea PH |
66 | .SH ATTRIBUTES |
67 | .SS Multithreading (see pthreads(7)) | |
68 | The | |
69 | .BR iswalnum () | |
70 | function is thread-safe with exceptions. | |
71 | It can be safely used in multithreaded applications, as long as | |
72 | .BR setlocale (3) | |
73 | is not called to change the locale during its execution. | |
47297adb | 74 | .SH CONFORMING TO |
68e1685c | 75 | C99. |
fea681da | 76 | .SH NOTES |
d9bfdb9c | 77 | The behavior of |
60a90ecd | 78 | .BR iswalnum () |
1274071a MK |
79 | depends on the |
80 | .B LC_CTYPE | |
81 | category of the | |
fea681da | 82 | current locale. |
47297adb | 83 | .SH SEE ALSO |
e37e3282 MK |
84 | .BR isalnum (3), |
85 | .BR iswctype (3) |