wctomb - convert a wide character to a multibyte sequence


   #include <stdlib.h>

   int wctomb(char *s, wchar_t wc);


   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


   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.


   For  an  explanation  of  the  terms  used   in   this   section,   see

   Interface  Attribute      Value          
   wctomb()   Thread safety  MT-Unsafe race 


   POSIX.1-2001, POSIX.1-2008, C99.


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

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


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


   This page is part of release 4.09 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


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