Merge pull request #1673 from Citadel-Station-13/upstream-merge-28567

[MIRROR] Refactors PDA cartridge permissions
2017-06-27 06:14:42 -05:00
parent 45b6931d9b f85de2ddd5
commit 83fead2492
6 changed files with 93 additions and 109 deletions
@@ -1417,3 +1417,10 @@ GLOBAL_PROTECT(valid_HTTPSGet)
 		mob_occupant = brain.brainmob

 	return mob_occupant
+
+//counts the number of bits in Byond's 16-bit width field
+//in constant time and memory!
+/proc/BitCount(bitfield)
+	var/temp = bitfield - ((bitfield>>1)&46811) - ((bitfield>>2)&37449) //0133333 and 0111111 respectively
+	temp = ((temp + (temp>>3))&29127) % 63	//070707
+	return temp