wctrans - wide-character translation mapping

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │ Interface                                                            │ Attribute     │ Value          │
       ├──────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │ wctrans()                                                            │ Thread safety │ MT-Safe locale │
       └──────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

       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

       POSIX.1-2001, C99.

       Standard C library (libc, -lc)

       wctrans - wide-character translation mapping

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

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

towctrans(3)

Linux man-pages 6.9.1                              2024-05-02                                         wctrans(3)

       C11, POSIX.1-2008.

#include<wctype.h>wctrans_twctrans(constchar*name);