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

        public static Buf fromHex(string s)
        {
            int slen = s.Length;
              byte[] buf = new byte[slen/2];
              int[] hexInv = Buf.hexInv;
              int size = 0;

              for (int i=0; i<slen; ++i)
              {
            int c0 = s[i];
            int n0 = c0 < 128 ? hexInv[c0] : -1;
            if (n0 < 0) continue;

            int n1 = -1;
            if (++i < slen)
            {
              int c1 = s[i];
              n1 = c1 < 128 ? hexInv[c1] : -1;
            }
            if (n1 < 0) throw IOErr.make("Invalid hex str").val;

            buf[size++] = (byte)((n0 << 4) | n1);
              }

              return new MemBuf(buf, size);
        }