Originální popis anglicky:
towlower - convert a wide character to lowercase
Návod, kniha: Linux Programmer's Manual
#include <wctype.h>
wint_t towlower(wint_t wc);
The
towlower function is the wide-character equivalent of the
tolower function. If
wc is a wide character, it is converted to
lowercase. Characters which do not have case are returned unchanged. If
wc is WEOF, WEOF is returned.
The
towlower function returns the lowercase equivalent of
wc, or
WEOF if
wc is WEOF.
ISO/ANSI C, UNIX98
iswlower(3),
towctrans(3),
towupper(3)
The behaviour of
towlower 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.
