v7 man page for wctrans

WCTRANS(3)                                                   Linux Programmer's Manual                                                  WCTRANS(3)

NAME
       wctrans - wide-character translation mapping

SYNOPSIS
       #include <wctype.h>

       wctrans_t wctrans(const char *name);

DESCRIPTION
       The  wctrans_t type represents a mapping which can map a wide character to another wide character.  Its nature is implementation-dependent,
       but the special value (wctrans_t) 0 denotes an invalid mapping.  Nonzero wctrans_t values can be passed to  the  towctrans(3)  function  to
       actually perform the wide-character mapping.

       The  wctrans()  function  returns  a  mapping,  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.

           "tolower" - realizes the tolower(3) mapping
           "toupper" - realizes the toupper(3) mapping

RETURN VALUE
       The wctrans() function returns a mapping descriptor if the name is valid.  Otherwise, it returns (wctrans_t) 0.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +----------+---------------+----------------+
       |Interface | Attribute     | Value          |
       +----------+---------------+----------------+
       |wctrans() | Thread safety | MT-Safe locale |
       +----------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

NOTES
       The behavior of wctrans() depends on the LC_CTYPE category of the current locale.

SEE ALSO
       towctrans(3)

COLOPHON
       This page is part of release 4.15 of the Linux man-pages project.  A description of the project, information about reporting bugs, and  the
       latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

GNU                                                                 2015-08-08                                                          WCTRANS(3)