Created ZoneUtil for composing and decomposing qualified zone ids.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@767 542714f4-19e9-0310-aa3c-eee0fc999fb1
2001-12-13 05:46:11 +00:00
parent e670b076e6
commit 366914b4d1
2 changed files with 46 additions and 3 deletions
@@ -0,0 +1,39 @@
+//
+// $Id: ZoneUtil.java,v 1.1 2001/12/13 05:46:11 mdb Exp $
+
+package com.threerings.whirled.zone.server.util;
+
+/**
+ * Server-specific, zone-related utility functions.
+ */
+public class ZoneUtil
+{
+    /**
+     * Composes the zone type and zone id into a qualified zone id. A
+     * qualified zone id is what should be passed around so that the
+     * server can determine the zone type from the zone id when necessary.
+     */
+    public static int qualifyZoneId (byte zoneType, int zoneId)
+    {
+        int qualifiedZoneId = zoneType;
+        qualifiedZoneId <<= 24;
+        qualifiedZoneId |= zoneId;
+        return qualifiedZoneId;
+    }
+
+    /**
+     * Extracts the zone type from a qualified zone id.
+     */
+    public static int zoneType (int qualifiedZoneId)
+    {
+        return (0xFF000000 & qualifiedZoneId) >> 24;
+    }
+
+    /**
+     * Extracts the zone id from a qualified zone id.
+     */
+    public static int zoneId (int qualifiedZoneId)
+    {
+        return (0x00FFFFFF & qualifiedZoneId);
+    }
+}