rem: mbstowcs(pwcs, s, n) int *pwcs; const char *s; size_t n;
add: mbstowcs(wchar_t *pwcs, const char *s, size_t n)
context: mbstowcs(pwcs, s, n)	int *pwcs;	const char *s;	size_t n;{	int count = 0;	if (n != 0) {		do {			if ((*pwcs++ = (int) *s++) == 0)				break;			count++;		} while (--n != 0);	}		return count;}