Fan.Sys.Buf.Buf C# (CSharp) Method

        static Buf()
        {
            // base64
              for (int i=0; i<hexInv.Length; ++i) hexInv[i] = -1;
              for (int i=0; i<10; ++i)  hexInv['0'+i] = i;
              for (int i=10; i<16; ++i) hexInv['a'+i-10] = hexInv['A'+i-10] = i;

              // hex
              for (int i=0; i<base64inv.Length; ++i)   base64inv[i] = -1;
              for (int i=0; i<base64chars.Length; ++i) base64inv[base64chars[i]] = i;
              base64inv['='] = 0;
        }