Manual Reference Pages  - ISWLOWER (3)

NAME

iswlower - test for lowercase wide character

CONTENTS

Synopsis
Description
Notes
Colophon

SYNOPSIS


#include <wctype.h> 

int iswlower(wint_t wc);

DESCRIPTION

The 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 iswlower() function returns nonzero if wc is a wide character belonging to the wide-character class "lower". Otherwise it returns zero.

CONFORMING TO

C99.

NOTES

The behavior of 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

islower(3), iswctype(3), towlower(3)

COLOPHON

This page is part of release 3.44 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 ISWLOWER (3) 1999-07-25
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