content: /*
   * Decompiled with CFR 0.153-SNAPSHOT (d6f6758-dirty).
   */
  package com.mysql.cj.util;
  
  public class Base64Decoder {
      private static byte[] decoderMap = new byte[]{-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -2, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1};
  
      private static byte getNextValidByte(byte[] in, IntWrapper pos, int maxPos) {
          while (pos.value <= maxPos) {
              if (in[pos.value] >= 0 && decoderMap[in[pos.value]] >= 0) {
                  return in[pos.value++];
              }
              ++pos.value;
          }
          return 61;
      }
  
      public static byte[] decode(byte[] in, int pos, int length) {
          IntWrapper offset = new IntWrapper(pos);
          byte[] sestet = new byte[4];
          int outLen = length * 3 / 4;
          byte[] octet = new byte[outLen];
          int octetId = 0;
          int maxPos = offset.value + length - 1;
          while (offset.value <= maxPos) {
              sestet[0] = decoderMap[Base64Decoder.getNextValidByte(in, offset, maxPos)];
              sestet[1] = decoderMap[Base64Decoder.getNextValidByte(in, offset, maxPos)];
              sestet[2] = decoderMap[Base64Decoder.getNextValidByte(in, offset, maxPos)];
              sestet[3] = decoderMap[Base64Decoder.getNextValidByte(in, offset, maxPos)];
              if (sestet[1] != -2) {
                  octet[octetId++] = (byte)(sestet[0] << 2 | sestet[1] >>> 4);
              }
              if (sestet[2] != -2) {
                  octet[octetId++] = (byte)((sestet[1] & 0xF) << 4 | sestet[2] >>> 2);
              }
              if (sestet[3] == -2) continue;
              octet[octetId++] = (byte)((sestet[2] & 3) << 6 | sestet[3]);
          }
          byte[] out = new byte[octetId];
          System.arraycopy(octet, 0, out, 0, octetId);
          return out;
      }
  
      public static class IntWrapper {
          public int value;
  
          public IntWrapper(int value) {
              this.value = value;
          }
      }
  }
  
  