ref: 1cb7a8ce327f282796f022d51503b0a5b92786cf
dir: /iching.c/
#include <u.h>
#include <libc.h>
void
main() {
int fd;
int i, j;
uchar bits[3];
int lines[6];
int linesproc[6];
long value;
uchar table[64] = { 2, 23, 8, 20, 16, 35, 45, 12,
15, 52, 39, 53, 62, 56, 31, 33,
7, 4, 29, 59, 40, 64, 47, 6,
46, 18, 48, 57, 32, 50, 28, 44,
24, 27, 3, 42, 51, 21, 17, 25,
36, 22, 63, 37, 55, 30, 49, 13,
19, 41, 60, 61, 54, 38, 58, 10,
11, 26, 5, 9, 34, 14, 43, 1 };
Rune first;
Rune changed;
fd = open("/dev/random", OREAD);
if (fd < 0)
sysfatal("open");
value = 0;
for (i = 0; i < 6; i++) {
if (readn(fd, bits, 3) != 3)
sysfatal("read");
lines[i] = 0;
for (j = 0; j < 3; j++)
lines[i] += bits[j] & 1? 2: 3;
print("%d ", lines[i]);
linesproc[i] = lines[i] & 1;
value += linesproc[i] == 1? 1 << (5 - i): 0;
}
print("\n");
value = 0x4DC0 - 1 + table[value];
first = value;
value = 0;
for (i = 0; i < 6; i++) {
if ((lines[i] % 3) == 0)
linesproc[i] = linesproc[i] == 1? 0: 1;
value += linesproc[i] == 1? 1 << (5 - i): 0;
}
value = 0x4DC0 - 1 + table[value];
changed = value;
print("%C %C\n", first, changed);
}