v0.1

Subsurface/Source/Map/Md5Hash.cs

@@ -0,0 +1,95 @@
+using System.IO;
+using System.Security.Cryptography;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Xml.Linq;
+
+namespace Subsurface
+{
+    public class Md5Hash
+    {
+        private string hash;
+        private string shortHash;
+
+        public string Hash
+        {
+            get 
+            {
+                return hash;
+            }  
+        }
+
+        public string ShortHash
+        {
+            get 
+            { 
+                return shortHash;
+            }
+        }
+
+        public Md5Hash(string md5Hash)
+        {
+            this.hash = md5Hash;
+
+            shortHash = GetShortHash(md5Hash);
+        }
+
+        public Md5Hash(byte[] bytes)
+        {
+            hash = CalculateHash(bytes);
+
+            shortHash = GetShortHash(hash);
+        }
+
+        public Md5Hash(FileStream fileStream)
+        {
+            hash = CalculateHash(fileStream);
+
+            shortHash = GetShortHash(hash);
+        }
+
+        public Md5Hash(XDocument doc)
+        {
+            string docString = Regex.Replace(doc.ToString(), @"\s+", "");
+
+            byte[] inputBytes = Encoding.ASCII.GetBytes(docString);
+
+            hash = CalculateHash(inputBytes);
+
+            shortHash = GetShortHash(hash);
+        }
+
+        private string CalculateHash(FileStream stream)
+        {
+            MD5 md5 = MD5.Create();
+            byte[] byteHash = md5.ComputeHash(stream);
+            // step 2, convert byte array to hex string
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < byteHash.Length; i++)
+            {
+                sb.Append(byteHash[i].ToString("X2"));
+            }
+
+            return sb.ToString();
+        }
+
+        private string CalculateHash(byte[] bytes)
+        {
+            MD5 md5 = MD5.Create();
+            byte[] byteHash = md5.ComputeHash(bytes);
+            // step 2, convert byte array to hex string
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < byteHash.Length; i++)
+            {
+                sb.Append(byteHash[i].ToString("X2"));
+            }
+
+            return sb.ToString();
+        }
+
+        private string GetShortHash(string fullHash)
+        {
+            return fullHash;
+        }
+    }
+}