|MBSRTOWCS(3)||Linux Programmer's Manual||MBSRTOWCS(3)|
size_t mbsrtowcs(wchar_t *restrict dest, const char **restrict src, size_t len, mbstate_t *restrict ps);
- An invalid multibyte sequence has been encountered. In this case, *src is left pointing to the invalid multibyte sequence, (size_t) -1 is returned, and errno is set to EILSEQ.
- len non-L'\0' wide characters have been stored at dest. In this case, *src is left pointing to the next multibyte sequence to be converted, and the number of wide characters written to dest is returned.
- The multibyte string has been completely converted, including the terminating null wide character ('\0'), which has the side effect of bringing back *ps to the initial state. In this case, *src is set to NULL, and the number of wide characters written to dest, excluding the terminating null wide character, is returned.
If dest is NULL, len is ignored, and the conversion proceeds as above, except that the converted wide characters are not written out to memory, and that no length limit exists.
In both of the above cases, if ps is NULL, a static anonymous state known only to the mbsrtowcs() function is used instead.
The programmer must ensure that there is room for at least len wide characters at dest.
|mbsrtowcs ()||Thread safety||MT-Unsafe race:mbsrtowcs/!ps|
Passing NULL as ps is not multithread safe.