NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON

ISWALPHA(3)               Linux Programmer's Manual              ISWALPHA(3)

NAME         top

       iswalpha - test for alphabetic wide character

SYNOPSIS         top

       #include <wctype.h>

       int iswalpha(wint_t wc);

DESCRIPTION         top

       The iswalpha() function is the wide-character equivalent of the
       isalpha(3) function.  It tests whether wc is a wide character
       belonging to the wide-character class "alpha".

       The wide-character class "alpha" is a subclass of the wide-character
       class "alnum", and therefore also a subclass of the wide-character
       class "graph" and of the wide-character class "print".

       Being a subclass of the wide-character class "print", the wide-
       character class "alpha" is disjoint from the wide-character class
       "cntrl".

       Being a subclass of the wide-character class "graph", the wide-
       character class "alpha" is disjoint from the wide-character class
       "space" and its subclass "blank".

       Being a subclass of the wide-character class "alnum", the wide-
       character class "alpha" is disjoint from the wide-character class
       "punct".

       The wide-character class "alpha" is disjoint from the wide-character
       class "digit".

       The wide-character class "alpha" contains the wide-character classes
       "upper" and "lower".

       The wide-character class "alpha" always contains at least the letters
       'A' to 'Z' and 'a' to 'z'.

RETURN VALUE         top

       The iswalpha() function returns nonzero if wc is a wide character
       belonging to the wide-character class "alpha".  Otherwise, it returns
       zero.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).

       ┌───────────┬───────────────┬────────────────┐
       │Interface  Attribute     Value          │
       ├───────────┼───────────────┼────────────────┤
       │iswalpha() │ Thread safety │ MT-Safe locale │
       └───────────┴───────────────┴────────────────┘

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES         top

       The behavior of iswalpha() depends on the LC_CTYPE category of the
       current locale.

SEE ALSO         top

       isalpha(3), iswctype(3)

COLOPHON         top

       This page is part of release 4.08 of the Linux man-pages project.  A
       description of the project, information about reporting bugs, and the
       latest version of this page, can be found at
       https://www.kernel.org/doc/man-pages/.

GNU                              2015-08-08                      ISWALPHA(3)