Fan.Sys.SysInStream.unread C# (CSharp) Method

        public override InStream unread(int n)
        {
            try
              {
            // don't take the hit until we know we need to wrap
            // the raw input stream with a pushback stream
            if (!(inStream is PushbackStream))
              inStream = new PushbackStream(inStream, 128);
            ((PushbackStream)inStream).Unread(n);
            return this;
              }
              catch (IOException e)
              {
            throw IOErr.make(e).val;
              }
        }