How to use

checkBitAccess

method

in

org.apollo.net.codec.game.GamePacketReader

/**
 * Gets the specified amount of bits from the buffer.
 *
 * @param amount The amount of bits.
 * @return The value.
 * @throws IllegalStateException If the reader is not in bit access mode.
 * @throws IllegalArgumentException If the number of bits is not between 1 and 31 inclusive.
 */
public int getBits(int amount) {
  Preconditions.checkArgument(amount >= 0 && amount <= 32, "Number of bits must be between 1 and 32 inclusive.");
  checkBitAccess();
  int bytePos = bitIndex >> 3;
  int bitOffset = 8 - (bitIndex & 7);
  int value = 0;
  bitIndex += amount;
  for (; amount > bitOffset; bitOffset = 8) {
    value += (buffer.getByte(bytePos++) & DataConstants.BIT_MASK[bitOffset]) << amount - bitOffset;
    amount -= bitOffset;
  }
  if (amount == bitOffset) {
    value += buffer.getByte(bytePos) & DataConstants.BIT_MASK[bitOffset];
  } else {
    value += buffer.getByte(bytePos) >> bitOffset - amount & DataConstants.BIT_MASK[amount];
  }
  return value;
}