shuffle_roles.diff for wraith v1.4.8-5375-g9d8fbc9b

shuffle_roles.diff

--- devel/wraith_20200311/src/mod/irc.mod/irc.cc        2020-03-11 18:09:31.812212890 -0600
+++ rainbow_20200311/src/mod/irc.mod/irc.cc     2020-03-12 05:48:10.294738359 -0600
@@ -1764,10 +1837,16 @@ static void bot_release_nick (char *botn
   release_nick(par);
 }
 
+static time_t lastshuffle = 0;
+static u_int32_t prng_x, prng_y, prng_z, prng_w;
+static u_int32_t xyz_shuffle(size_t n) { u_int32_t t = prng_x; t ^= t << 11; t ^= t >> 8; prng_x = prng_y; prng_y = prng_z; prng_z = prng_w; prng_w ^= prng_w >> 19; prng_w ^= t; return (prng_w % n); }
+
 static void rebalance_roles_chan(struct chanset_t* chan)
 {
+
+  time_t temp_x; temp_x = time(NULL); temp_x = (temp_x & 0xFFFFFF00);
   /* Compare to tand_updates which ensures a trigger on unlink/link. */
-  if (chan->role_rebalance_cookie == tand_updates) {
+  if ((chan->role_rebalance_cookie == tand_updates) && (temp_x == lastshuffle)) {
     return;
   }
 
@@ -1810,9 +1889,20 @@ static void rebalance_roles_chan(struct
 
     bots << m->user->handle;
   }
+
   botcount = bots.length();
   if (botcount == 0)
     return;
+
+  prng_x = temp_x; prng_y = 0x243f6a88; prng_z = 0x93c467e3; prng_w = 0x9e3779b9; lastshuffle = temp_x;
+
+  for (size_t i = 0; i < botcount; i++) {
+    const size_t j = xyz_shuffle(botcount);
+    bd::String randombot = bots[j];
+    bots[j] = bots[i];
+    bots[i] = randombot;
+  }
+
   bot_bits = (int*)calloc(botcount, sizeof(bot_bits[0]));
 
   for (roleidx = 0; role_counts[roleidx].name; roleidx++) {