тест на широкий символ верхнего регистра (test for uppercase wide character)
Имя (Name)
iswupper - test for uppercase wide character
Синопсис (Synopsis)
#include <wctype.h>
int iswupper(wint_t wc);
Описание (Description)
The iswupper() function is the wide-character equivalent of the
isupper(3) function. It tests whether wc is a wide character
belonging to the wide-character class "upper".
The wide-character class "upper" 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 "upper" is disjoint from the wide-character class
"cntrl".
Being a subclass of the wide-character class "graph", the wide-
character class "upper" 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 "upper" is disjoint from the wide-character class
"punct".
Being a subclass of the wide-character class "alpha", the wide-
character class "upper" is disjoint from the wide-character class
"digit".
The wide-character class "upper" contains at least those
characters wc which are equal to towupper(wc) and different from
towlower(wc).
The wide-character class "upper" always contains at least the
letters 'A' to 'Z'.
Возвращаемое значение (Return value)
The iswupper() function returns nonzero if wc is a wide character
belonging to the wide-character class "upper". Otherwise, it
returns zero.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│iswupper() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008, C99.
Примечание (Note)
The behavior of iswupper() 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.
Смотри также (See also)
isupper(3), iswctype(3), towupper(3)
