SYNOPSIS

     #include <stdlib.h>

     int
     wctomb(char *mbchar, wchar_t wchar);

     #include <xlocale.h>

     int
     wctomb_l(char *mbchar, wchar_t wchar, locale_t loc);

DESCRIPTION

     The wctomb() function converts a wide character wchar into a multibyte
     character and stores the result in mbchar.  The object pointed to by
     mbchar must be large enough to accommodate the multibyte character, which
     may be up to MB_LEN_MAX bytes.

     A call with a null mbchar pointer returns nonzero if the current locale
     requires shift states, zero otherwise; if shift states are required, the
     shift state is reset to the initial state.

     While the wctomb() function uses the current locale, the wctomb_l() func-
     tion may be passed a locale directly. See xlocale(3) for more informa-
     tion.

RETURN VALUES

     If mbchar is NULL, the wctomb() function returns nonzero if shift states
     are supported, zero otherwise.  If mbchar is valid, wctomb() returns the
     number of bytes processed in mbchar, or -1 if no multibyte character
     could be recognized or converted.  In this case, wctomb()'s internal con-
     version state is undefined.

ERRORS

     The wctomb() function will fail if:

     [EILSEQ]           An invalid multibyte sequence was detected.

     [EINVAL]           The internal conversion state is invalid.

SEE ALSO

     mbtowc(3), wcrtomb(3), wcstombs(3), wctob(3), xlocale(3)

STANDARDS

     The wctomb() function conforms to ISO/IEC 9899:1999 (``ISO C99'').

BSD                              April 8, 2004                             BSD