Section: Linux Programmer's Manual (3)
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wctomb - convert a wide character to a multibyte sequence
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 only known to the wctomb function,
and returns the length of said multibyte representation, i.e. 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 non-zero if the encoding has non-trivial 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
If s is NULL, the wctomb() function returns non-zero if the
encoding has non-trivial shift state, or zero if the encoding is stateless.
The behaviour of wctomb() depends on the LC_CTYPE category of the
This function is not multi-thread safe. The function wcrtomb() provides
a better interface to the same functionality.
- RETURN VALUE
- CONFORMING TO
- SEE ALSO
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