void
xc_printf(const char *fmt, ...)
{
va_list ap;
struct putchar_arg pca;
#ifdef PRINTF_BUFR_SIZE
char buf[PRINTF_BUFR_SIZE];
pca.buf = buf;
pca.size = sizeof(buf);
pca.n_next = 0;
#else
pca.buf = NULL;
pca.size = 0;
#endif
KASSERT((xen_domain()), ("call to xc_printf from non Xen guest"));
va_start(ap, fmt);
kvprintf(fmt, putchar, &pca, 10, ap);
va_end(ap);
#ifdef PRINTF_BUFR_SIZE
if (pca.n_next != 0)
HYPERVISOR_console_write(buf, pca.n_next);
#endif
}
void
vprintk(const char *fmt, va_list ap)
{
int ret;
static char buf[PRINTK_BUFSIZE];
ret = vsnprintf(buf, PRINTK_BUFSIZE - 1, fmt, ap);
buf[ret] = 0;
(void)HYPERVISOR_console_write(buf, ret);
}
static void
putchar(int c, void *arg)
{
struct putchar_arg *pca;
pca = (struct putchar_arg *)arg;
if (pca->buf == NULL) {
/*
* We have no buffer, output directly to the
* console char by char.
*/
HYPERVISOR_console_write((char *)&c, 1);
} else {
pca->buf[pca->n_next++] = c;
if ((pca->size == pca->n_next) || (c = '\0')) {
/* Flush the buffer */
HYPERVISOR_console_write(pca->buf, pca->n_next);
pca->n_next = 0;
}
}
}
void
printk(const char *fmt, ...)
{
va_list ap;
int ret;
static char buf[PRINTK_BUFSIZE];
va_start(ap, fmt);
ret = vsnprintf(buf, PRINTK_BUFSIZE - 1, fmt, ap);
va_end(ap);
buf[ret] = 0;
(void)HYPERVISOR_console_write(buf, ret);
}
