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man:iswalpha

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

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 isal-
     pha(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-charac-
     ter class "alpha" is disjoint from the wide-character class "cntrl".
     Being a subclass of the wide-character class "graph", the  wide-charac-
     ter 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-charac-
     ter 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

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

CONFORMING TO

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

NOTES

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

SEE ALSO

     isalpha(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 ISWALPHA(3)

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

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