iswctype(3) [osf1 man page]

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)

Check Out this Related Man Page

WCTYPE(3)						   BSD Library Functions Manual 						 WCTYPE(3)

NAME

     iswctype, iswctype_l, wctype, wctype_l -- wide character class functions

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <wctype.h>

     int
     iswctype(wint_t wc, wctype_t charclass);

     wctype_t
     wctype(const char *property);

     #include <wctype.h>
     #include <xlocale.h>

     int
     iswctype_l(wint_t wc, wctype_t charclass, locale_t loc);

     wctype_t
     wctype_l(const char *property, locale_t loc);

DESCRIPTION

     The wctype() function returns a value of type wctype_t, which represents the requested wide character class and may be used as the second
     argument for calls to iswctype().

     The following character class names are recognised:

	   alnum   cntrl   ideogram   print   space   xdigit
	   alpha   digit   lower      punct   special
	   blank   graph   phonogram  rune    upper

     The iswctype() function checks whether the wide character wc is in the character class charclass.

     Although the iswctype() and wctype() functions use the current locale, the iswctype_l() and wctype_l() functions may be passed locales
     directly. See xlocale(3) for more information.

RETURN VALUES

     The iswctype() function returns non-zero if and only if wc has the property described by charclass, or charclass is zero.

     The wctype() function returns 0 if property is invalid; otherwise, it returns a value of type wctype_t that can be used in subsequent calls
     to iswctype().

EXAMPLES

     Reimplement iswalpha(3) in terms of iswctype() and wctype():

	   int
	   myiswalpha(wint_t wc)
	   {
		   return (iswctype(wc, wctype("alpha")));
	   }

SEE ALSO

     ctype(3), nextwctype(3), xlocale(3)

STANDARDS

     The iswctype() and wctype() functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').  The ``ideogram'', ``phonogram'', ``special'', and
     ``rune'' character classes are extensions.

HISTORY

     The iswctype() and wctype() functions first appeared in FreeBSD 5.0.

BSD
								  March 27, 2004							       BSD

Linux and UNIX Man Pages

iswctype(3) [osf1 man page]

Check Out this Related Man Page