wctomb - convert a wide character to a multibyte sequence
#include <stdlib.h>
int wctomb(char *s, wchar_t wc);
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.
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.
For an explanation of the terms used in this section, see
attributes(7).
| Interface |
Attribute |
Value |
| wctomb () |
Thread safety |
MT-Unsafe race |
POSIX.1-2001, POSIX.1-2008, C99.
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.
MB_CUR_MAX(3),
mblen(3),
mbstowcs(3),
mbtowc(3),
wcrtomb(3),
wcstombs(3)