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 only known 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, only known 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.
The behavior of wctomb()
depends on the LC_CTYPE
category of the current locale.
This function is not multithread safe. The function wcrtomb(3) provides a better interface to the same functionality.