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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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WCTYPE(3P) POSIX Programmer's Manual WCTYPE(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
wctype, wctype_l — define character class
#include <wctype.h>
wctype_t wctype(const char *property);
wctype_t wctype_l(const char *property, locale_t locale);
For wctype(): The functionality described on this reference page
is aligned with the ISO C standard. Any conflict between the
requirements described here and the ISO C standard is
unintentional. This volume of POSIX.1‐2017 defers to the ISO C
standard.
The wctype() and wctype_l() functions are defined for valid
character class names as defined in the current locale or in the
locale represented by locale, respectively.
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.
These functions shall return a value of type wctype_t, which can
be used as the second argument to subsequent calls of iswctype()
and iswctype_l().
The wctype() and wctype_l() functions shall determine values of
wctype_t according to the rules of the coded character set
defined by character type information in the current locale or in
the locale represented by locale, respectively (category
LC_CTYPE).
The values returned by wctype() shall be valid until a call to
setlocale() that modifies the category LC_CTYPE.
The values returned by wctype_l() shall be valid only in calls to
iswctype_l() with a locale represented by locale with the same
LC_CTYPE category value.
The behavior is undefined if the locale argument to wctype_l() is
the special locale object LC_GLOBAL_LOCALE or is not a valid
locale object handle.
The wctype() and wctype_l() functions shall return 0 if the given
character class name is not valid for the current locale
(category LC_CTYPE); otherwise, they shall return an object of
type wctype_t that can be used in calls to iswctype() and
iswctype_l().
No errors are defined.
The following sections are informative.
None.
None.
None.
None.
iswctype(3p)
The Base Definitions volume of POSIX.1‐2017, wctype.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 WCTYPE(3P)
Pages that refer to this page: wchar.h(0p), wctype.h(0p), iswctype(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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