Added noddy test for dice functions

diff --git a/examples/dice-test.cc b/examples/dice-test.cc
new file mode 100644 (file)
index 0000000..08c5527
--- /dev/null
+++ b/examples/dice-test.cc
@@ -0,0 +1,49 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <libmormegil/dice.h>
+
+uint32_t keybuf[8];
+uint32_t nonce[2];
+
+int main()
+{
+    int fd;
+    fd = open("/dev/urandom", O_RDONLY, 0);
+    if (fd < 0)
+    {
+        perror("S20prng-test: can't open /dev/urandom");
+        return 1;
+    }
+
+    int i = 0;
+    int testroll;
+    uint64_t counter = 0;
+    int rolls[11];
+
+    read(fd, keybuf, sizeof keybuf);
+    read(fd, nonce, sizeof nonce);
+    dice_setstate(keybuf, nonce, &counter, &i);
+    for (i = 0; i < 11; ++i)
+    {
+        rolls[i] = 0;
+    }
+    for (i = 0; i < 1000000; ++i)
+    {
+        testroll = dice(2, 6);
+        if ((testroll < 2) || (testroll > 12))
+        {
+            fprintf(stderr, "S20prng-test: FAIL: 2d6 roll came up %d\n", testroll);
+            return 2;
+        }
+        rolls[testroll - 2]++;
+    }
+    for (i = 0; i < 11; ++i)
+    {
+        printf("%d: %d times\n", i + 2, rolls[i]);
+    }
+    return 0;
+}
+