NAME
wctype - define character class
SYNOPSIS
#include <wctype.h>
wctype_t wctype(const char *property);
DESCRIPTION
The wctype() function is defined for valid character class names as
defined in the current locale. The property argument is a string
identifying a generic character class for which codeset-specific type
information is required. The following character class names shall be
defined in all locales:
alnum digit punct
alpha graph space
blank lower upper
cntrl print xdigit
Additional character class names defined in the locale definition file
(category LC_CTYPE ) can also be specified.
The function shall return a value of type wctype_t, which can be used
as the second argument to subsequent calls of iswctype(). The wctype()
function shall determine values of wctype_t according to the rules of
the coded character set defined by character type information in the
program’s locale (category LC_CTYPE ). The values returned by wctype()
shall be valid until a call to setlocale() that modifies the category
LC_CTYPE .
RETURN VALUE
The wctype() function shall return 0 if the given character class name
is not valid for the current locale (category LC_CTYPE ); otherwise, it
shall return an object of type wctype_t that can be used in calls to
iswctype().
ERRORS
No errors are defined.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
iswctype() , the Base Definitions volume of IEEE Std 1003.1-2001,
<wctype.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group. In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .