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1 | .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
2 | .\" | |
3 | .\" This is free documentation; you can redistribute it and/or | |
4 | .\" modify it under the terms of the GNU General Public License as | |
5 | .\" published by the Free Software Foundation; either version 2 of | |
6 | .\" the License, or (at your option) any later version. | |
7 | .\" | |
8 | .\" References consulted: | |
9 | .\" GNU glibc-2 source code and manual | |
10 | .\" Dinkumware C library reference http://www.dinkumware.com/ | |
11 | .\" OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html | |
12 | .\" ISO/IEC 9899:1999 | |
13 | .\" | |
14 | .TH ISWALNUM 3 1999-07-25 "GNU" "Linux Programmer's Manual" | |
15 | .SH NAME | |
16 | iswalnum \- test for alphanumeric wide character | |
17 | .SH SYNOPSIS | |
18 | .nf | |
19 | .B #include <wctype.h> | |
20 | .sp | |
21 | .BI "int iswalnum(wint_t " wc ); | |
22 | .fi | |
23 | .SH DESCRIPTION | |
60a90ecd MK |
24 | The |
25 | .BR iswalnum () | |
26 | function is the wide-character equivalent of the | |
27 | .BR isalnum () | |
28 | function. | |
c13182ef | 29 | It tests whether \fIwc\fP is a wide character |
d0f17b57 | 30 | belonging to the wide-character class "alnum". |
fea681da | 31 | .PP |
d0f17b57 MK |
32 | The wide-character class "alnum" is a subclass of the wide-character class |
33 | "graph", and therefore also a subclass of the wide-character class "print". | |
fea681da | 34 | .PP |
d0f17b57 MK |
35 | Being a subclass of the wide-character class "print", |
36 | the wide-character class | |
37 | "alnum" is disjoint from the wide-character class "cntrl". | |
fea681da | 38 | .PP |
d0f17b57 MK |
39 | Being a subclass of the wide-character class "graph", |
40 | the wide-character class "alnum" is disjoint from | |
41 | the wide-character class "space" and its subclass "blank". | |
fea681da | 42 | .PP |
d0f17b57 | 43 | The wide-character class "alnum" is disjoint from the wide-character class |
fea681da MK |
44 | "punct". |
45 | .PP | |
d0f17b57 | 46 | The wide-character class "alnum" is the union of the wide-character classes |
c13182ef | 47 | "alpha" and "digit". |
d0f17b57 | 48 | As such, it also contains the wide-character class |
fea681da MK |
49 | "xdigit". |
50 | .PP | |
d0f17b57 | 51 | The wide-character class "alnum" always contains at least the letters 'A' |
fea681da MK |
52 | to 'Z', 'a' to 'z' and the digits '0' to '9'. |
53 | .SH "RETURN VALUE" | |
60a90ecd MK |
54 | The |
55 | .BR iswalnum () | |
56 | function returns non-zero | |
fbe183be | 57 | if \fIwc\fP is a wide character |
d0f17b57 | 58 | belonging to the wide-character class "alnum". |
c13182ef | 59 | Otherwise it returns zero. |
fea681da | 60 | .SH "CONFORMING TO" |
68e1685c | 61 | C99. |
fea681da | 62 | .SH NOTES |
60a90ecd MK |
63 | The behaviour of |
64 | .BR iswalnum () | |
65 | depends on the LC_CTYPE category of the | |
fea681da | 66 | current locale. |
e37e3282 MK |
67 | .SH "SEE ALSO" |
68 | .BR isalnum (3), | |
69 | .BR iswctype (3) |