wctrans(3p) — Linux manual page


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

       wctrans, wctrans_l — define character mapping

SYNOPSIS         top

       #include <wctype.h>

       wctrans_t wctrans(const char *charclass);
       wctrans_t wctrans_l(const char *charclass, locale_t locale);

DESCRIPTION         top

       For wctrans(): 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 wctrans() and wctrans_l() functions are defined for valid
       character mapping names identified in the current locale. The
       charclass is a string identifying a generic character mapping name
       for which codeset-specific information is required. The following
       character mapping names are defined in all locales: tolower and

       These functions shall return a value of type wctrans_t, which can be
       used as the second argument to subsequent calls of towctrans() and

       The wctrans() and wctrans_l() functions shall determine values of
       wctrans_t according to the rules of the coded character set defined
       by character mapping information in the current locale or in the
       locale represented by locale, respectively (category LC_CTYPE).

       The values returned by wctrans() shall be valid until a call to
       setlocale() that modifies the category LC_CTYPE.

       The values returned by wctrans_l() shall be valid only in calls to
       towctrans_l() with a locale represented by locale with the same
       LC_CTYPE category value.

       The behavior is undefined if the locale argument to wctrans_l() is
       the special locale object LC_GLOBAL_LOCALE or is not a valid locale
       object handle.

RETURN VALUE         top

       The wctrans() and wctrans_l() functions shall return 0 and may set
       errno to indicate the error if the given character mapping name is
       not valid for the current locale (category LC_CTYPE); otherwise, they
       shall return a non-zero object of type wctrans_t that can be used in
       calls to towctrans() and towctrans_l().

ERRORS         top

       These functions may fail if:

       EINVAL The character mapping name pointed to by charclass is not
              valid in the current locale.

       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                         WCTRANS(3P)

Pages that refer to this page: wctype.h(0p)towctrans(3p)towctrans_l(3p)