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



NAME
       iswalpha - test for alphabetic wide character

SYNOPSIS
       #include <wctype.h>

       int iswalpha(wint_t wc);

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

CONFORMING TO
       C99.

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

SEE ALSO
       isalpha(3), iswctype(3)

COLOPHON
       This  page  is  part of release 3.53 of the Linux man-pages project.  A description of the
       project,    and    information    about    reporting    bugs,    can    be    found     at
       http://www.kernel.org/doc/man-pages/.



GNU                                         1999-07-25                                ISWALPHA(3)