wctomb - convert a wide character to a multibyte sequence

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

       If  s  is  not NULL, the wctomb() function converts the wide character wc to its multibyte representation
       and stores it at the beginning of the character array pointed to by s.  It updates the shift state, which
       is stored in a static anonymous variable known only to the wctomb() function, and returns the  length  of
       said multibyte representation, that is, the number of bytes written at s.

       The programmer must ensure that there is room for at least MB_CUR_MAX bytes at s.

       If  s  is NULL, the wctomb() function resets the shift state, known only to this function, to the initial
       state, and returns nonzero if the encoding has nontrivial  shift  state,  or  zero  if  the  encoding  is
       stateless.

       POSIX.1-2001, C99.

       Standard C library (libc, -lc)

       wctomb - convert a wide character to a multibyte sequence

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

       If  s  is  not NULL, the wctomb() function returns the number of bytes that have been written to the byte
       array at s.  If wc can not be represented as a multibyte sequence (according to the current  locale),  -1
       is returned.

       If  s  is NULL, the wctomb() function returns nonzero if the encoding has nontrivial shift state, or zero
       if the encoding is stateless.

MB_CUR_MAX(3), mblen(3), mbstowcs(3), mbtowc(3), wcrtomb(3), wcstombs(3)

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

       C11, POSIX.1-2008.

#include<stdlib.h>intwctomb(char*s,wchar_twc);

       The function wcrtomb(3) provides a better interface to the same functionality.