osf1 man page for iswctype

iswctype(3)						     Library Functions Manual						       iswctype(3)

NAME
       iswctype - Determines the properties of a wide character

LIBRARY
       Standard C Library (libc.so, libc.a)

SYNOPSIS
       #include <wctype.h>

       int iswctype(	  wint_t wc,	  wctype_t wc_prop);

       The XPG4 standard specifies that applications define this function by including wchar.h rather than wctype.h, which is required by the cur-
       rent version of the ISO C standard. Both include statements are supported.

STANDARDS
       Interfaces documented on this reference page conform to industry standards as follows:

       iswctype():  ISO C, XPG4

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

PARAMETERS
       Specifies the wide character to be tested.  Specifies a handle for the property to be tested for.

DESCRIPTION
       The iswctype() function tests the wide character specified by the wc parameter to determine if it has the property specified by the wc_prop
       parameter.   The wctype() function associates a character property with a wctype_t handle.  You should get the value of the wc_prop parame-
       ter from a call to wctype() before using it in a call to iswctype().  The iswctype() function is defined for the  wide-character  null  and
       for values in the character range of the current code set defined in the current locale.

       Using  an iswclass function, such as iswalnum(), is equivalent to using the iswctype() and wctype() functions to test for a basic property,
       such as alnum.  However, iswctype() and wctype() can test wide characters against any class defined in a locale; the functions are not lim-
       ited to testing for basic properties.

EXAMPLES
       The  following example tests if a wide character belongs to the class of blank characters as defined for the current locale.  In this case,
       the required call to wctype() is included directly as the wc_prop parameter:

	      iswctype(wc, wctype("blank")); The following example tests if a wide character is an uppercase character as defined by  the  current
	      locale.  In this case, the required call to wctype() is specified through a handle:

	      int yes_or_no; wint_t wc; wctype_t property_test;
		.
		.
		.  property_test=wctype("upper"); yes_or_no=iswctype(wc,property_test);

RETURN VALUES
       If  the	wc  parameter  has  the property specified by the wc_prop parameter, the iswctype() function returns a nonzero value. If the value
       specified by the wc parameter does not have the property specified by the wc_prop parameter, the iswctype() function returns a value  of  0
       (zero).	If the value specified by the wc parameter is not in the function's domain, the result is undefined. If the value specified by the
       wc_prop parameter is not valid, the result is undefined.  The value of the wc_prop parameter can be invalid because it was not obtained	by
       a  call	to  the  wctype()  function. The wc_prop value can also be invalidated by an intervening call to the setlocale() function that has
       affected the LC_CTYPE environment variable.

RELATED INFORMATION
       Functions: ctype(3), towctrans(3), wctrans(3), wctype(3), setlocale(3), iswalnum(3) delim off

																       iswctype(3)