iswlower

ISWLOWER(3)                Linux Programmer's Manual               ISWLOWER(3)



NAME
       iswlower - 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
       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 non-zero if wc is a wide character
       belonging to the wide character class "lower". Otherwise it returns
       zero.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       islower(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
       characters, because Unicode knows about three cases: upper, lower and
       title case.



GNU                              July 25, 1999                     ISWLOWER(3)