#include <u.h>
#include <libc.h>
#include <libsec.h>

static int
nibble(int c)
{
	if(c >= '0' && c <= '9')
		return c - '0';
	if(c < 0x20)
		c += 0x20;
	if(c >= 'a' && c <= 'f')
		return c - 'a'+10;
	return 0xff;
}

static void
bindigest(char *s, uchar *t)
{
	int i;

	if(strlen(s) != 2*SHA1dlen)
		sysfatal("bad digest %s", s);
	for(i = 0; i < SHA1dlen; i++)
		t[i] = nibble(s[2*i])<<4 | nibble(s[2*i + 1]);
}

static char *vs = "vac:da6b4b5549383cffc1b5691d824fc4bd381f0f6b";

void
main(void)
{
	int i, n;
	uchar score[SHA1dlen];
	uvlong t0, t1;

	n = 1000*1000;
	t0 = nsec();
	for(i = 0; i < n; i++){
		if(strncmp(vs, "vac:", 4) == 0)
			bindigest(vs + 4, score);
		else
			sysfatal("bad digest");
	}
	t1 = nsec();
	print("%g\n", 1.*(t1 - t0)/(1.*n));
	exits("");
}