iswalpha

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
       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 charac-
       ter class "alpha" is disjoint from the wide character class "cntrl".

       Being a subclass of the wide character class "graph", the wide  charac-
       ter 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  charac-
       ter 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  non-zero  if  wc  is  a  wide  character
       belonging  to  the  wide  character class "alpha". Otherwise it returns
       zero.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       isalpha(3), iswctype(3)

NOTES
       The behaviour of iswalpha depends on the LC_CTYPE category of the  cur-
       rent locale.



GNU                               1999-07-25                       ISWALPHA(3)