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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 only known 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, only known 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.

CONFORMING TO

       C99.

NOTES

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

       This function is  not  multithread  safe.   The  function  wcrtomb(3)  provides  a  better
       interface to the same functionality.

SEE ALSO

       MB_CUR_MAX(3), wcrtomb(3), wcstombs(3)

COLOPHON

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