DESCRIPTION
wcrtomb() converts the wide character given by
wc to the corresponding multibyte character, and stores it in the array pointed to by
s unless
s is a null pointer. This function will modify the first at most
MB_CUR_MAX bytes of the array pointed to by
s.
The behaviour of wcrtomb() is affected by the LC_CTYPE category of the current locale.
These are the special cases:
-
wc == 0
-
For state-dependent encodings, wcrtomb() stores a nul byte preceded by special byte sequence (if any) to return to an initial state in the array pointed to by s, and the state object pointed to by ps also returns to an initial state.
-
s == NULL
-
wcrtomb() just places ps into an initial state. It is equivalent to the following call:
wcrtomb(buf, L'\0', ps);
Here, buf is a dummy buffer. In this case, wc is ignored.
-
ps == NULL
-
mbrtowc() uses its own internal state object to keep the conversion state, instead of ps mentioned in this manual page.
Calling any other functions in Standard C Library (libc, -lc) never changes the internal state of mbrtowc(), which is initialized at startup time of the program.