1 files changed, 86 insertions, 0 deletions

diff --git a/cs-dotnet/src/gatsinteger.cs b/cs-dotnet/src/gatsinteger.cs
new file mode 100644
index 0000000..cbb552e
--- /dev/null
+++ b/cs-dotnet/src/gatsinteger.cs
@@ -0,0 +1,86 @@
+using System.IO;
+
+namespace Com.Xagasoft.Gats
+{
+    public class GatsInteger : GatsObject
+    {
+        public long Value { get; set; }
+
+        public GatsInteger( long val=0 )
+        {
+            Value = val;
+        }
+
+        public override string ToString()
+        {
+            return Value.ToString();
+        }
+
+        public override void Read( Stream s, byte cType )
+        {
+            Value = ReadPackedInt( s );
+        }
+
+        public override void Write( Stream s )
+        {
+            s.WriteByte( (int)'i' );
+            WritePackedInt( s, Value );
+        }
+
+        public static long ReadPackedInt( Stream s )
+        {
+            int b;
+            long rOut = 0;
+            bool bNeg;
+
+            b = s.ReadByte();
+            if( b == -1 )
+                throw new GatsException("Premature end of stream encountered.");
+            bNeg = (b&0x40) == 0x40;
+            rOut |= ((long)b)&0x3F;
+            int c = 0;
+            while( (b&0x80) == 0x80 )
+            {
+                b = s.ReadByte();
+                if( b == -1 )
+                    throw new GatsException("Premature end of stream encountered.");
+                rOut |= (long)(b&0x7F) << (6+7*(c++));
+            }
+            if( bNeg )
+                return -rOut;
+            return rOut;
+        }
+
+        public static void WritePackedInt( Stream s, long iIn )
+        {
+            byte b;
+
+            if( iIn < 0 )
+            {
+                iIn = -iIn;
+                b = (byte)(iIn&0x3F);
+                if( iIn > b )
+                    b |= 0x80 | 0x40;
+                else
+                    b |= 0x40;
+            }
+            else
+            {
+                b = (byte)(iIn&0x3F);
+                if( iIn > b )
+                    b |= 0x80;
+            }
+            s.WriteByte( b );
+            iIn = iIn >> 6;
+
+            while( iIn > 0 )
+            {
+                b = (byte)(iIn&0x7F);
+                if( iIn > b )
+                    b |= 0x80;
+                s.WriteByte( b );
+                iIn = iIn >> 7;
+            }
+        }
+    };
+}