| /* |
| * Copyright (C) 2015 Samsung System LSI |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| |
| package com.android.bluetooth; |
| |
| import com.android.bluetooth.map.BluetoothMapUtils; |
| |
| import java.io.UnsupportedEncodingException; |
| |
| /** |
| * Class to represent a 128bit value using two long member variables. |
| * Has functionality to convert to/from hex-strings. |
| * Mind that since signed variables are used to store the value internally |
| * is used, the MSB/LSB long values can be negative. |
| */ |
| public class SignedLongLong implements Comparable<SignedLongLong> { |
| |
| private long mMostSigBits; |
| private long mLeastSigBits; |
| |
| public SignedLongLong(long leastSigBits, long mostSigBits) { |
| this.mMostSigBits = mostSigBits; |
| this.mLeastSigBits = leastSigBits; |
| } |
| |
| /** |
| * Create a SignedLongLong from a Hex-String without "0x" prefix |
| * @param value the hex-string |
| * @return the created object |
| * @throws UnsupportedEncodingException |
| */ |
| public static SignedLongLong fromString(String value) throws UnsupportedEncodingException { |
| String lsbStr, msbStr; |
| long lsb = 0, msb = 0; |
| |
| lsbStr = msbStr = null; |
| if (value == null) { |
| throw new NullPointerException(); |
| } |
| value = value.trim(); |
| int valueLength = value.length(); |
| if (valueLength == 0 || valueLength > 32) { |
| throw new NumberFormatException("invalid string length: " + valueLength); |
| } |
| if (valueLength <= 16) { |
| lsbStr = value; |
| } else { |
| lsbStr = value.substring(valueLength - 16, valueLength); |
| msbStr = value.substring(0, valueLength - 16); |
| msb = BluetoothMapUtils.getLongFromString(msbStr); |
| } |
| lsb = BluetoothMapUtils.getLongFromString(lsbStr); |
| return new SignedLongLong(lsb, msb); |
| } |
| |
| @Override |
| public int compareTo(SignedLongLong another) { |
| if (mMostSigBits == another.mMostSigBits) { |
| if (mLeastSigBits == another.mLeastSigBits) { |
| return 0; |
| } |
| if (mLeastSigBits < another.mLeastSigBits) { |
| return -1; |
| } |
| return 1; |
| } |
| if (mMostSigBits < another.mMostSigBits) { |
| return -1; |
| } |
| return 1; |
| } |
| |
| @Override |
| public String toString() { |
| return toHexString(); |
| } |
| |
| /** |
| * |
| * @return a hex-string representation of the object values |
| */ |
| public String toHexString() { |
| return BluetoothMapUtils.getLongLongAsString(mLeastSigBits, mMostSigBits); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| SignedLongLong other = (SignedLongLong) obj; |
| if (mLeastSigBits != other.mLeastSigBits) { |
| return false; |
| } |
| if (mMostSigBits != other.mMostSigBits) { |
| return false; |
| } |
| return true; |
| } |
| |
| public long getMostSignificantBits() { |
| return mMostSigBits; |
| } |
| |
| public long getLeastSignificantBits() { |
| return mLeastSigBits; |
| } |
| |
| } |