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)