noble (3) wctype.3.gz

NAME

       wctype - wide-character classification

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <wctype.h>

       wctype_t wctype(const char *name);

DESCRIPTION

       The  wctype_t  type represents a property which a wide character may or may not have.  In other words, it
       represents a class of wide characters.  This type's nature is implementation-dependent, but  the  special
       value (wctype_t) 0 denotes an invalid property.  Nonzero wctype_t values can be passed to the iswctype(3)
       function to actually test whether a given wide character has the property.

       The wctype() function returns a property, given by its name.  The set  of  valid  names  depends  on  the
       LC_CTYPE category of the current locale, but the following names are valid in all locales.

           "alnum" - realizes the isalnum(3) classification function
           "alpha" - realizes the isalpha(3) classification function
           "blank" - realizes the isblank(3) classification function
           "cntrl" - realizes the iscntrl(3) classification function
           "digit" - realizes the isdigit(3) classification function
           "graph" - realizes the isgraph(3) classification function
           "lower" - realizes the islower(3) classification function
           "print" - realizes the isprint(3) classification function
           "punct" - realizes the ispunct(3) classification function
           "space" - realizes the isspace(3) classification function
           "upper" - realizes the isupper(3) classification function
           "xdigit" - realizes the isxdigit(3) classification function

RETURN VALUE

       The  wctype()  function  returns  a  property  descriptor  if  the  name is valid.  Otherwise, it returns
       (wctype_t) 0.

ATTRIBUTES

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

       ┌───────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │Interface                                                              │ Attribute     │ Value          │
       ├───────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │wctype()                                                               │ Thread safety │ MT-Safe locale │
       └───────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       The behavior of wctype() depends on the LC_CTYPE category of the current locale.

SEE ALSO

       iswctype(3)