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



NAME
       wctomb - convert a wide character to a multibyte sequence

SYNOPSIS
       #include <stdlib.h>

       int wctomb(char *s, wchar_t wc);

DESCRIPTION
       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()	 func-
       tion, 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 state-
       less.

RETURN VALUE
       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 repre-
       sented 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.

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

       +----------+---------------+----------------+
       |Interface | Attribute	  | Value	   |
       +----------+---------------+----------------+
       |wctomb()  | Thread safety | MT-Unsafe race |
       +----------+---------------+----------------+
CONFORMING TO
       POSIX.1-2001, POSIX.1-2008, C99.

NOTES
       The  behavior  of wctomb() depends on the LC_CTYPE category of the cur-
       rent locale.

       The function wcrtomb(3) provides a better interface to the  same	 func-
       tionality.

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

COLOPHON
       This page is part of release 4.10 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			     WCTOMB(3)