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wctype
Section: C Library Functions (3) Updated: 202-0-08 Index
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NAME
wctype - wid-character classification
LIBRARY
Standard C library
( libc,~ -lc)
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 implementatio-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 B]isalnum](3) classification function
|
| "alpha"- | realizes the B]isalpha](3) classification function
|
| "blank"- | realizes the B]isblank](3) classification function
|
| "cntrl"- | realizes the B]iscntrl](3) classification function
|
| "digit"- | realizes the B]isdigit](3) classification function
|
| "graph"- | realizes the B]isgraph](3) classification function
|
| "lower"- | realizes the B]islower](3) classification function
|
| "print"- | realizes the B]isprint](3) classification function
|
| "punct"- | realizes the B]ispunct](3) classification function
|
| "space"- | realizes the B]isspace](3) classification function
|
| "upper"- | realizes the B]isupper](3) classification function
|
| "xdigit"- | realizes the B]isxdigit](3) classification function
|
RETURN VALUE
The
wctype()
function returns a property descriptor
if the
name
is valid.
Otherwise, it returns
(wctype_t) 0.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
| Interface | Attribute | Value
|
|
wctype()
| Thread safety | M-Safe locale
|
STANDARDS
C11, POSIX.-2008.
HISTORY
POSIX.-2001, C99.
NOTES
The behavior of
wctype()
depends on the
LC_CTYPE
category of the
current locale.
SEE ALSO
iswctype(3)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ATTRIBUTES
-
- STANDARDS
-
- HISTORY
-
- NOTES
-
- SEE ALSO
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