GENWiki

Premier IT Outsourcing and Support Services within the UK

User Tools

Site Tools


man:iswalnum

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

NAME

     iswalnum - test for alphanumeric wide character

SYNOPSIS

     #include <wctype.h>
     int iswalnum(wint_t wc);

DESCRIPTION

     The  iswalnum()  function is the wide-character equivalent of the isal-
     num(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-charac-
     ter class "alnum" is disjoint from the wide-character class "cntrl".
     Being a subclass of the wide-character class "graph", the  wide-charac-
     ter 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-char-
     acter 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'.

RETURN VALUE

     The iswalnum() function returns nonzero  if  wc  is  a  wide  character
     belonging  to  the wide-character class "alnum".  Otherwise, it returns
     zero.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     +-----------+---------------+----------------+
     |Interface  | Attribute     | Value          |
     +-----------+---------------+----------------+
     |iswalnum() | Thread safety | MT-Safe locale |
     +-----------+---------------+----------------+

CONFORMING TO

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

NOTES

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

SEE ALSO

     isalnum(3), 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 ISWALNUM(3)

/data/webs/external/dokuwiki/data/pages/man/iswalnum.txt · Last modified: 2019/05/17 09:47 by 127.0.0.1

Was this page helpful?-10+1

Donate Powered by PHP Valid HTML5 Valid CSS Driven by DokuWiki