wctype_l(3p) — Linux manual page


WCTYPE(3P)                POSIX Programmer's Manual               WCTYPE(3P)

PROLOG         top

       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.

NAME         top

       wctype, wctype_l — define character class

SYNOPSIS         top

       #include <wctype.h>

       wctype_t wctype(const char *property);
       wctype_t wctype_l(const char *property, locale_t locale);

DESCRIPTION         top

       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.1‐2008 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

       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.

RETURN VALUE         top

       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().

ERRORS         top

       No errors are defined.

       The following sections are informative.

EXAMPLES         top




RATIONALE         top




SEE ALSO         top


       The Base Definitions volume of POSIX.1‐2008, wctype.h(0p)

COPYRIGHT         top

       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1, 2013 Edition, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The Open
       Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
       applied.) 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.unix.org/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                 2013                          WCTYPE(3P)