ISWALPHA
Section: Linux Programmer's Manual (3)
Updated: 2014-01-28
Index
Return to Main Contents
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.
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
current locale.
SEE ALSO
isalpha(3),
iswctype(3)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- Multithreading (see pthreads(7))
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
This document was created by
man2html,
using the manual pages.
Time: 02:55:05 GMT, September 18, 2014