NAME

       wctomb - convert a wide character to a multibyte sequence

LIBRARY

       Standard C library (libc, -lc)

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

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

       ┌────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │Interface                                               │ Attribute     │ Value          │
       ├────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │wctomb()                                                │ Thread safety │ MT-Unsafe race │
       └────────────────────────────────────────────────────────┴───────────────┴────────────────┘

VERSIONS

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

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

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

SEE ALSO

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