NAME
iswalpha - test for alphabetic wide character
SYNOPSIS
#include <wctype.h>
I int iswalpha(wint_t wc );
DESCRIPTION
The
R 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
R iswalpha ()
function returns non-zero
if wc is a wide character
belonging to the wide-character class "alpha".
Otherwise it returns zero.
CONFORMING TO
C99.
NOTES
The behavior of
R iswalpha ()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
ČLÁNKY DO MAILU