проверка буквенно-цифрового символа (test for alphanumeric wide character)
Имя (Name)
iswalnum - test for alphanumeric wide character
Синопсис (Synopsis)
#include <wctype.h>
int iswalnum(wint_t wc);
Описание (Description)
The iswalnum() function is the wide-character equivalent of the
isalnum(3) function. It tests whether wc is a wide character
belonging to the wide-character class "alnum".
The wide-character class "alnum" is a subclass of the wide-
character class "graph", and therefore also a subclass of the
wide-character class "print".
Being a subclass of the wide-character class "print", the wide-
character class "alnum" is disjoint from the wide-character class
"cntrl".
Being a subclass of the wide-character class "graph", the wide-
character class "alnum" is disjoint from the wide-character class
"space" and its subclass "blank".
The wide-character class "alnum" is disjoint from the wide-
character class "punct".
The wide-character class "alnum" is the union of the wide-
character classes "alpha" and "digit". As such, it also contains
the wide-character class "xdigit".
The wide-character class "alnum" always contains at least the
letters 'A' to 'Z', 'a' to 'z' and the digits '0' to '9'.
Возвращаемое значение (Return value)
The iswalnum() function returns nonzero if wc is a wide character
belonging to the wide-character class "alnum". Otherwise, it
returns zero.
Атрибуты (Attributes)
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│iswalnum() │ Thread safety │ MT-Safe locale │
└───────────────────────────────┴───────────────┴────────────────┘
Стандарты (Conforming to)
POSIX.1-2001, POSIX.1-2008, C99.
Примечание (Note)
The behavior of iswalnum() depends on the LC_CTYPE category of
the current locale.
Смотри также (See also)
isalnum(3), iswctype(3)
