ISWLOWER(3) Linux Programmer's Manual ISWLOWER(3)NAMEiswlower - test for lowercase wide character
SYNOPSIS
#include <wctype.h>
int iswlower(wint_t wc);
DESCRIPTION
The iswlower() function is the wide-character equivalent of the
islower() 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 charac‐
ter class "lower" is disjoint from the wide character class "cntrl".
Being a subclass of the wide character class "graph", the wide charac‐
ter 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 charac‐
ter class "lower" is disjoint from the wide character class "punct".
Being a subclass of the wide character class "alpha", the wide charac‐
ter 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 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.
SEE ALSOislower(3), iswctype(3), towlower(3)NOTES
The behaviour of iswlower() depends on the LC_CTYPE category of the
current locale.
This function is not very appropriate for dealing with Unicode charac‐
ters, because Unicode knows about three cases: upper, lower and title
case.
GNU 1999-07-25 ISWLOWER(3)
