Initial commit

1 files changed, 76 insertions, 0 deletions

diff --git a/NET/worlds/scape/CDDBHash.java b/NET/worlds/scape/CDDBHash.java
new file mode 100644
index 0000000..5d9ba86
--- /dev/null
+++ b/NET/worlds/scape/CDDBHash.java
@@ -0,0 +1,76 @@
+package NET.worlds.scape;
+
+public class CDDBHash {
+   public static String hashString(CDTrackInfo tracks) {
+      String id = Integer.toHexString(hash(tracks));
+      int len = id.length();
+      if (len >= 8) {
+         return id;
+      } else {
+         String pad = "0";
+
+         while (++len < 8) {
+            pad = pad + "0";
+         }
+
+         return pad + id;
+      }
+   }
+
+   public static String lookupString(CDTrackInfo tracks) {
+      int numTracks = tracks.getNumTracks();
+      String ret = hashString(tracks) + " " + numTracks;
+
+      for (int i = 0; i < numTracks; i++) {
+         ret = ret + " " + tracks.getStartFrames(i);
+      }
+
+      return ret + " " + leadOutSecs(tracks);
+   }
+
+   private static int addDigits(int n) {
+      String buf = "" + n;
+      int ret = 0;
+
+      for (int i = 0; i < buf.length(); i++) {
+         ret += buf.charAt(i) - '0';
+      }
+
+      return ret;
+   }
+
+   private static int leadOutSecs(CDTrackInfo tracks) {
+      int last = tracks.getNumTracks() - 1;
+      int omin = tracks.getPosM(last);
+      int osec = tracks.getPosS(last);
+      int ofrm = tracks.getPosF(last);
+      int lmin = tracks.getLenM(last);
+      int lsec = tracks.getLenS(last);
+      int lfrm = tracks.getLenF(last);
+      if (++lfrm == 75) {
+         lfrm = 0;
+         if (++lsec == 60) {
+            lsec = 0;
+            lmin++;
+         }
+      }
+
+      ofrm += lfrm;
+      osec += ofrm / 75 + lsec;
+      omin += osec / 60 + lmin;
+      osec %= 60;
+      return omin * 60 + osec;
+   }
+
+   private static int hash(CDTrackInfo tracks) {
+      int n = 0;
+      int numTracks = tracks.getNumTracks();
+
+      for (int i = 0; i < numTracks; i++) {
+         n += addDigits(tracks.getPosM(i) * 60 + tracks.getPosS(i));
+      }
+
+      int t = leadOutSecs(tracks) - tracks.getPosM(0) * 60 - tracks.getPosS(0);
+      return n % 255 << 24 | t << 8 | numTracks;
+   }
+}