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RedHat 9 (Linux i386) - man page for iswcntrl (redhat section 3)

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

NAME
       iswcntrl - test for control wide character

SYNOPSIS
       #include <wctype.h>

       int iswcntrl(wint_t wc);

DESCRIPTION
       The  iswcntrl  function is the wide-character equivalent of the iscntrl function. It tests
       whether wc is a wide character belonging to the wide character class "cntrl".

       The wide character class "cntrl" is disjoint from the wide  character  class  "print"  and
       therefore  also	disjoint from its subclasses "graph", "alpha", "upper", "lower", "digit",
       "xdigit", "punct".

       For an unsigned char c, iscntrl(c) implies iswcntrl(btowc(c)), but not vice versa.

RETURN VALUE
       The iswcntrl function returns non-zero if wc is a wide character  belonging  to	the  wide
       character class "cntrl". Otherwise it returns zero.

CONFORMING TO
       ISO/ANSI C, UNIX98

SEE ALSO
       iscntrl(3), iswctype(3)

NOTES
       The behaviour of iswcntrl depends on the LC_CTYPE category of the current locale.

GNU					    1999-07-25				      ISWCNTRL(3)


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