|WCRTOMB(3)||Library Functions Manual||WCRTOMB(3)|
char * restrict s,
mbstate_t * restrict
wcrtomb() converts the wide character given by wc to the corresponding multibyte character, and stores up to
MB_CUR_MAXbytes in the array pointed to by s if s is not a null pointer.
The behaviour of
wcrtomb() is affected by
LC_CTYPE category of the current locale.
These are the special cases:
wcrtomb() stores a null byte preceded by a special byte sequence (if any) to return to an initial state to the array pointed by s, and the state object pointed by ps also returned to an initial state.
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.
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 libc never
change the internal state of
mbrtowc(), which is
initialized at startup time of the program.
wcrtomb() returns the number of bytes (including any shift sequences) which are stored in the array pointed to by s. If wc is not a valid wide character,
wcrtomb() returns (size_t)-1 and sets errno to indicate error.
wcrtomb() may cause an error in the following cases:
wcrtomb() function conforms to ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”). The restrict qualifier is added at ISO/IEC 9899/1999 (“ISO C99”).
|March 22, 2015||OpenBSD-current|