NAME
iswlower - test for lowercase wide character
SYNOPSIS
#include <wctype.h>
I int iswlower(wint_t wc );
DESCRIPTION
The
R iswlower ()
function is the wide-character equivalent of the
islower(3)
function.
It tests whether
wc is a wide character
belonging to the wide-character class "lower".
The wide-character class "lower" is a subclass of the wide-character class
"alpha", and therefore also a subclass
of the wide-character class "alnum", 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
"lower" is disjoint from the wide-character class "cntrl".
Being a subclass of the wide-character class "graph",
the wide-character class "lower" 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
"lower" is disjoint from the wide-character class "punct".
Being a subclass of the wide-character class "alpha",
the wide-character class
"lower" is disjoint from the wide-character class "digit".
The wide-character class "lower" contains at least
those characters wc
which are equal to towlower(wc) and different
from towupper(wc).
The wide-character class "lower" always contains
at least the letters 'a'
to 'z'.
RETURN VALUE
The
R iswlower ()
function returns non-zero
if wc is a wide character
belonging to the wide-character class "lower".
Otherwise it returns zero.
CONFORMING TO
C99.
NOTES
The behavior of
R iswlower ()
depends on the
LC_CTYPE
category of the
current locale.
This function is not very appropriate for dealing with Unicode characters,
because Unicode knows about three cases: upper, lower and title case.
SEE ALSO
ČLÁNKY DO MAILU