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Linux 2.6 - man page for wctomb (linux section 3)

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() 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.

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 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.

ATTRIBUTES
   Multithreading (see pthreads(7))
       The wctomb() function is not thread-safe.

CONFORMING TO
       C99.

NOTES
       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 functionality.

SEE ALSO
       MB_CUR_MAX(3), wcrtomb(3), wcstombs(3)

COLOPHON
       This page is part of release 3.55 of the Linux man-pages project.  A  description  of  the
       project,     and    information	  about    reporting	bugs,	 can	be    found    at
       http://www.kernel.org/doc/man-pages/.

GNU					    2013-09-09					WCTOMB(3)


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