Name
wctype — wide-character classification
Synopsis
#include <wctype.h>
wctype_t wctype( |
const char * |
name); |
DESCRIPTION
The wctype_t
type represents a property which a wide character may or may
not have. In other words, it represents a class of wide
characters. This type's nature is implementation dependent,
but the special value (wctype_t)
0 denotes an invalid property. Nonzero wctype_t values can be passed
to the iswctype(3) function to
actually test whether a given wide character has the
property.
The wctype() function
returns a property, given by its name. The set of valid names
depends on the LC_CTYPE category of the current locale, but
the following names are valid in all locales.
- "alnum"
-
realizes the isalnum(3)
classification function
- "alpha"
-
realizes the isalpha(3)
classification function
- "blank"
-
realizes the isblank(3)
classification function
- "cntrl"
-
realizes the iscntrl(3)
classification function
- "digit"
-
realizes the isdigit(3)
classification function
- "graph"
-
realizes the isgraph(3)
classification function
- "lower"
-
realizes the islower(3)
classification function
- "print"
-
realizes the isprint(3)
classification function
- "punct"
-
realizes the ispunct(3)
classification function
- "space"
-
realizes the isspace(3)
classification function
- "upper"
-
realizes the isupper(3)
classification function
- "xdigit"
-
realizes the isxdigit(3)
classification function
RETURN VALUE
The wctype() function
returns a property descriptor if the name is valid. Otherwise it
returns (wctype_t)
0.
NOTES
The behaviour of wctype()
depends on the LC_CTYPE category of the current locale.
SEE ALSO
iswctype(3)
Copyright (c) Bruno Haible <haible@clisp.cons.org>
This is free documentation; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
References consulted:
GNU glibc-2 source code and manual
Dinkumware C library reference http://www.dinkumware.com/
OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
ISO/IEC 9899:1999
|
