Linux 2.6 - man page for wctype (linux section 3posix)
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WCTYPE(P) POSIX Programmer's Manual WCTYPE(P)
wctype - define character class
wctype_t wctype(const char *property);
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 argu-
ment 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 .
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().
No errors are defined.
The following sections are informative.
iswctype() , the Base Definitions volume of IEEE Std 1003.1-2001, <wctype.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 WCTYPE(P)
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