mi_iprintf
count = mi_iprintf(fmt, ap, (pfi_t)mi_mpprintf_putc,
count = mi_iprintf(fmt, ap, (pfi_t)mi_mpprintf_putc,
static int mi_iprintf(char *, va_list, pfi_t, char *);
count = mi_iprintf(fmt, ap, (pfi_t)mi_sprintf_putc,
count = mi_iprintf(fmt, ap, mi_sprintf_noop, (char *)&cp);
count = mi_iprintf(fmt, ap, mi_sprintf_putc, (char *)&cp);