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 ISWALPHA 3 2014-01-28 "GNU" "Linux Programmer's Manual"
18 iswalpha \- test for alphabetic wide character
21 .B #include <wctype.h>
23 .BI "int iswalpha(wint_t " wc );
28 function is the wide-character equivalent of the
34 belonging to the wide-character class "alpha".
36 The wide-character class "alpha" is a subclass of the
37 wide-character class "alnum",
38 and therefore also a subclass of the wide-character class "graph" and
39 of the wide-character class "print".
41 Being a subclass of the wide-character class "print",
42 the wide-character class
43 "alpha" is disjoint from the wide-character class "cntrl".
45 Being a subclass of the wide-character class "graph",
46 the wide-character class "alpha" is disjoint from
47 the wide-character class "space" and its subclass "blank".
49 Being a subclass of the wide-character class "alnum",
50 the wide-character class "alpha" is disjoint from the
51 wide-character class "punct".
53 The wide-character class "alpha" is disjoint from the wide-character class
56 The wide-character class "alpha" contains the wide-character classes "upper"
59 The wide-character class "alpha" always contains at least the
60 letters \(aqA\(aq to \(aqZ\(aq and \(aqa\(aq to \(aqz\(aq.
64 function returns nonzero
68 belonging to the wide-character class "alpha".
69 Otherwise, it returns zero.
71 .SS Multithreading (see pthreads(7))
74 function is thread-safe with exceptions.
75 It can be safely used in multithreaded applications, as long as
77 is not called to change the locale during its execution.
91 This page is part of release 3.78 of the Linux
94 A description of the project,
95 information about reporting bugs,
96 and the latest version of this page,
98 \%http://www.kernel.org/doc/man\-pages/.