1 files changed, 49 insertions, 20 deletions

diff --git a/OpenSim/Framework/Util.cs b/OpenSim/Framework/Util.cs
index 5a5046e..366a38f 100644
--- a/OpenSim/Framework/Util.cs
+++ b/OpenSim/Framework/Util.cs
@@ -409,19 +409,25 @@ namespace OpenSim.Framework
         /// </summary>
         /// <param name="data"></param>
         /// <returns></returns>
+
         public static string Md5Hash(string data)
         {
-            byte[] dataMd5 = ComputeMD5Hash(data);
+            return Md5Hash(data, Encoding.Default);
+        }
+
+        public static string Md5Hash(string data, Encoding encoding)
+        {
+            byte[] dataMd5 = ComputeMD5Hash(data, encoding);
             StringBuilder sb = new StringBuilder();
             for (int i = 0; i < dataMd5.Length; i++)
                 sb.AppendFormat("{0:x2}", dataMd5[i]);
             return sb.ToString();
         }
 
-        private static byte[] ComputeMD5Hash(string data)
+        private static byte[] ComputeMD5Hash(string data, Encoding encoding)
         {
             MD5 md5 = MD5.Create();
-            return md5.ComputeHash(Encoding.Default.GetBytes(data));
+            return md5.ComputeHash(encoding.GetBytes(data));
         }
 
         /// <summary>
@@ -429,16 +435,22 @@ namespace OpenSim.Framework
         /// </summary>
         /// <param name="data"></param>
         /// <returns></returns>
+
         public static string SHA1Hash(string data)
         {
-            byte[] hash = ComputeSHA1Hash(data);
+            return SHA1Hash(data, Encoding.Default);
+        }
+
+        public static string SHA1Hash(string data, Encoding encoding)
+        {
+            byte[] hash = ComputeSHA1Hash(data, encoding);
             return BitConverter.ToString(hash).Replace("-", String.Empty);
         }
 
-        private static byte[] ComputeSHA1Hash(string src)
+        private static byte[] ComputeSHA1Hash(string src, Encoding encoding)
         {
             SHA1CryptoServiceProvider SHA1 = new SHA1CryptoServiceProvider();
-            return SHA1.ComputeHash(Encoding.Default.GetBytes(src));
+            return SHA1.ComputeHash(encoding.GetBytes(src));
         }
 
         public static int fast_distance2d(int x, int y)
@@ -1023,19 +1035,19 @@ namespace OpenSim.Framework
         {
             string os = String.Empty;
 
-            if (Environment.OSVersion.Platform != PlatformID.Unix)
-            {
-                os = Environment.OSVersion.ToString();
-            }
-            else
-            {
-                os = ReadEtcIssue();
-            }
-                      
-            if (os.Length > 45)
-            {
-                os = os.Substring(0, 45);
-            }
+//            if (Environment.OSVersion.Platform != PlatformID.Unix)
+//            {
+//                os = Environment.OSVersion.ToString();
+//            }
+//            else
+//            {
+//                os = ReadEtcIssue();
+//            }
+//                      
+//            if (os.Length > 45)
+//            {
+//                os = os.Substring(0, 45);
+//            }
             
             return os;
         }
@@ -1168,7 +1180,7 @@ namespace OpenSim.Framework
 
         public static Guid GetHashGuid(string data, string salt)
         {
-            byte[] hash = ComputeMD5Hash(data + salt);
+            byte[] hash = ComputeMD5Hash(data + salt, Encoding.Default);
 
             //string s = BitConverter.ToString(hash);
 
@@ -1537,6 +1549,23 @@ namespace OpenSim.Framework
             return (diff >= 0) ? diff : (diff + EnvironmentTickCountMask + 1);
         }
 
+        // Returns value of Tick Count A - TickCount B accounting for wrapping of TickCount
+        // Assumes both tcA and tcB came from previous calls to Util.EnvironmentTickCount().
+        // A positive return value indicates A occured later than B
+        public static Int32 EnvironmentTickCountCompare(Int32 tcA, Int32 tcB)
+        {
+            // A, B and TC are all between 0 and 0x3fffffff
+            int tc = EnvironmentTickCount();
+
+            if (tc - tcA >= 0)
+                tcA += EnvironmentTickCountMask + 1;
+
+            if (tc - tcB >= 0)
+                tcB += EnvironmentTickCountMask + 1;
+
+            return tcA - tcB;
+        }
+
         /// <summary>
         /// Prints the call stack at any given point. Useful for debugging.
         /// </summary>