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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 isal‐
       pha(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-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 nonzero	if  wc	is  a  wide  character
       belonging  to  the  wide-character class "alpha".  Otherwise it returns
       zero.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The iswalpha() function is thread-safe  with  exceptions.   It  can  be
       safely  used  in multithreaded applications, as long as setlocale(3) is
       not called to change the locale during its execution.

CONFORMING TO
       C99.

NOTES
       The behavior of iswalpha() depends on the LC_CTYPE category of the cur‐
       rent locale.

SEE ALSO
       isalpha(3), iswctype(3)

COLOPHON
       This  page  is  part of release 3.65 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				  2014-01-28			   ISWALPHA(3)
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