GNU.WIKI: The GNU/Linux Knowledge Base

  [HOME] [PHP Manual] [HowTo] [ABS] [MAN1] [MAN2] [MAN3] [MAN4] [MAN5] [MAN6] [MAN7] [MAN8] [MAN9]

  [0-9] [Aa] [Bb] [Cc] [Dd] [Ee] [Ff] [Gg] [Hh] [Ii] [Jj] [Kk] [Ll] [Mm] [Nn] [Oo] [Pp] [Qq] [Rr] [Ss] [Tt] [Uu] [Vv] [Ww] [Xx] [Yy] [Zz]


NAME

       iswalpha - test for alphabetic wide character

SYNOPSIS

       #include <wctype.h>

       int iswalpha(wint_t wc);

DESCRIPTION

       The  iswalpha()  function  is  the  wide-character  equivalent  of  the
       isalpha(3) function.  It tests whether wc is a wide character belonging
       to the wide-character class "alpha".

       The  wide-character  class  "alpha" is a subclass of the wide-character
       class "alnum", and therefore also  a  subclass  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 "alpha"  is  disjoint  from  the  wide-character  class
       "cntrl".

       Being  a  subclass  of  the  wide-character  class  "graph",  the wide-
       character class "alpha"  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 "alpha"  is  disjoint  from  the  wide-character  class
       "punct".

       The  wide-character  class  "alpha" is disjoint from the wide-character
       class "digit".

       The wide-character class "alpha" contains  the  wide-character  classes
       "upper" and "lower".

       The  wide-character  class "alpha" always contains at least the letters
       'A' to 'Z' and 'a' to 'z'.

RETURN VALUE

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

ATTRIBUTES

   Multithreading (see pthreads(7))
       The iswalpha() function is thread-safe  with  exceptions.   It  can  be
       safely  used  in multithreaded applications, as long as setlocale(3) is
       not called to change the locale during its execution.

CONFORMING TO

       C99.

NOTES

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

SEE ALSO

       isalpha(3), iswctype(3)

COLOPHON

       This  page  is  part of release 3.65 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



  All copyrights belong to their respective owners. Other content (c) 2014-2018, GNU.WIKI. Please report site errors to webmaster@gnu.wiki.
Page load time: 0.110 seconds. Last modified: November 04 2018 12:49:43.