_itoa
numstr = _itoa (num, numbuf + sizeof numbuf, 16, info->spec == 'A');\
char *cp = _itoa (value, tmpbuf + sizeof (value) * 4, base, upper_case);
extern char *_itoa (unsigned long long int value, char *buflim,
numstr = _itoa (num, numbuf + sizeof numbuf, 16,
string = _itoa (number.longlong, workend, base, \