1 .\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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
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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
14 .TH ISWALNUM 3 1999-07-25 "GNU" "Linux Programmer's Manual"
16 iswalnum \- test for alphanumeric wide character
19 .B #include <wctype.h>
21 .BI "int iswalnum(wint_t " wc );
26 function is the wide-character equivalent of the
29 It tests whether \fIwc\fP is a wide character
30 belonging to the wide-character class "alnum".
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".
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".
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".
43 The wide-character class "alnum" is disjoint from the wide-character class
46 The wide-character class "alnum" is the union of the wide-character classes
48 As such, it also contains the wide-character class
51 The wide-character class "alnum" always contains at least the letters \(aqA\(aq
52 to \(aqZ\(aq, \(aqa\(aq to \(aqz\(aq and the digits \(aq0\(aq to \(aq9\(aq.
56 function returns nonzero
57 if \fIwc\fP is a wide character
58 belonging to the wide-character class "alnum".
59 Otherwise it returns zero.