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man:wctype

WCTYPE(3) Linux Programmer's Manual WCTYPE(3)

NAME

     wctype - wide-character classification

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  charac-
     ters.   This type's nature is implementation-dependent, but the special
     value (wctype_t) 0 denotes an invalid property.  Nonzero wctype_t  val-
     ues  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 |
     +----------+---------------+----------------+

CONFORMING TO

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

NOTES

     The behavior of wctype() depends on the LC_CTYPE category of  the  cur-
     rent locale.

SEE ALSO

     iswctype(3)

COLOPHON

     This  page  is  part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs,  and  the
     latest     version     of     this    page,    can    be    found    at
     https://www.kernel.org/doc/man-pages/.

GNU 2015-08-08 WCTYPE(3)

/data/webs/external/dokuwiki/data/pages/man/wctype.txt · Last modified: 2019/05/17 09:32 by 127.0.0.1

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