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#include <printf.h>
#include <stdint.h>
#include <spinlock.h>
#include <sbi.h>
#include <stdarg.h>
static char digits[] = "0123456789abcdef";
struct spinlock mutex;
int locked = 0;
int
puts(const char *str)
{
do {
sbi_console_putchar(*str);
} while (*(str++) != '\0');
}
#define PUTCHAR(c) sbi_console_putchar(c)
static void
printint(int xx, int base, int sign)
{
char buf[16];
int i;
unsigned int x;
if (sign && (sign = xx < 0))
x = -xx;
else
x = xx;
i = 0;
do {
buf[i++] = digits[x % base];
} while ((x /= base) != 0);
if (sign)
buf[i++] = '-';
while (--i >= 0)
PUTCHAR(buf[i]);
}
static void
printptr(uint64_t x)
{
int i;
puts("0x");
for (i = 0; i < (sizeof(uint64_t) * 2); i++, x <<= 4)
PUTCHAR(digits[x >> (sizeof(int64_t) * 8 - 4)]);
}
void
printf(const char *fmt, ...)
{
va_list ap;
int i, c, _locked;
char *s;
_locked = locked;
if (_locked)
acquire(&mutex);
va_start(ap, fmt);
for (i = 0; (c = fmt[i] & 0xff) != 0; i++) {
if (c != '%') {
PUTCHAR(c);
continue;
}
c = fmt[++i] & 0xff;
if (!c)
break;
switch (c) {
case 'd':
case 'i':
printint(va_arg(ap, int), 10, 1);
break;
case 'x':
printint(va_arg(ap, int), 16, 1);
break;
case 'p':
printptr(va_arg(ap, uint64_t));
break;
case '%':
PUTCHAR('%');
break;
}
}
if (_locked)
release(&mutex);
}
void printf_init(void)
{
initlock(&mutex);
locked = 1;
}
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