Manpages - iswlower.3

iswlower - test for lowercase wide character

  #include <wctype.h>

  int iswlower(wint_t wc);

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’.

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

For an explanation of the terms used in this section, see *attributes*(7).

POSIX.1-2001, POSIX.1-2008, C99.

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.

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

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