X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=Novacoin%2FVarInt.cs;h=0f77b18d89644a94049f425d90e7633864c8740c;hb=be9d844557911f95165d2c9875c4f5b2822cfc92;hp=d376caea89da3b10d28d2db8bf5884efa55d42e1;hpb=a12e065afeedd315e80bd0b928f46dbdea762ec8;p=NovacoinLibrary.git

diff --git a/Novacoin/VarInt.cs b/Novacoin/VarInt.cs
index d376cae..0f77b18 100644
--- a/Novacoin/VarInt.cs
+++ b/Novacoin/VarInt.cs
@@ -18,6 +18,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.IO;
 
 namespace Novacoin
 {
@@ -82,6 +83,26 @@ namespace Novacoin
             return EncodeVarInt((ulong)n);
         }
 
+        public static int GetEncodedSize(long n)
+        {
+            if (n <= 0xfc)
+            {
+                return 1;
+            }
+            else if (n <= ushort.MaxValue)
+            {
+                return 3;
+            }
+            else if (n <= uint.MaxValue)
+            {
+                return 5;
+            }
+            else
+            {
+                return 9;
+            }
+        }
+
         /// <summary>
         /// Decodes integer value from compact representation
         /// 
@@ -108,5 +129,23 @@ namespace Novacoin
                     return prefix;
             }
         }
+
+        public static ulong ReadVarInt(ref BinaryReader reader)
+        {
+            byte prefix = reader.ReadByte();
+
+            switch (prefix)
+            {
+                case 0xfd: // ushort
+                    return reader.ReadUInt16();
+                case 0xfe: // uint
+                    return reader.ReadUInt32();
+                case 0xff: // ulong
+                    return reader.ReadUInt64();
+                default:
+                    return prefix;
+            }
+        }
+
     }
 }