Utils.java revision 74ae04c73312403e89db0f8e9bd9601d403b4783 
1/*
2 * Copyright (C) 2012 Google Inc.
3 */
4
5package com.android.bluetooth;
6
7import android.bluetooth.BluetoothAdapter;
8import android.bluetooth.BluetoothDevice;
9import android.os.ParcelUuid;
10
11import java.nio.ByteBuffer;
12import java.nio.ByteOrder;
13import java.util.UUID;
14
15/**
16 * @hide
17 */
18
19final public class Utils {
20    static final int BD_ADDR_LEN = 6; // bytes
21    static final int BD_UUID_LEN = 16; // bytes
22
23    public static String getAddressStringFromByte(byte[] address) {
24        if (address == null || address.length !=6) {
25            return null;
26        }
27
28        return String.format("%02X:%02X:%02X:%02X:%02X:%02X",
29                address[0], address[1], address[2], address[3], address[4],
30                address[5]);
31    }
32
33    public static byte[] getByteAddress(BluetoothDevice device) {
34        return getBytesFromAddress(device.getAddress());
35    }
36
37    public static byte[] getBytesFromAddress(String address) {
38        int i, j = 0;
39        byte[] output = new byte[BD_ADDR_LEN];
40
41        for (i = 0; i < address.length();i++) {
42            if (address.charAt(i) != ':') {
43                output[j] = (byte) Integer.parseInt(address.substring(i, i+2), 16);
44                j++;
45                i++;
46            }
47        }
48
49        return output;
50    }
51
52    public static int byteArrayToInt(byte[] valueBuf) {
53        return byteArrayToInt(valueBuf, 0);
54    }
55
56    public static short byteArrayToShort(byte[] valueBuf) {
57        ByteBuffer converter = ByteBuffer.wrap(valueBuf);
58        converter.order(ByteOrder.nativeOrder());
59        return converter.getShort();
60    }
61
62    public static int byteArrayToInt(byte[] valueBuf, int offset) {
63        ByteBuffer converter = ByteBuffer.wrap(valueBuf);
64        converter.order(ByteOrder.nativeOrder());
65        return converter.getInt(offset);
66    }
67
68    public static byte[] intToByteArray(int value) {
69        ByteBuffer converter = ByteBuffer.allocate(4);
70        converter.order(ByteOrder.nativeOrder());
71        converter.putInt(value);
72        return converter.array();
73    }
74
75    public static byte[] uuidToByteArray(ParcelUuid pUuid) {
76        int length = BD_UUID_LEN;
77        ByteBuffer converter = ByteBuffer.allocate(length);
78        converter.order(ByteOrder.BIG_ENDIAN);
79        long msb, lsb;
80        UUID uuid = pUuid.getUuid();
81        msb = uuid.getMostSignificantBits();
82        lsb = uuid.getLeastSignificantBits();
83        converter.putLong(msb);
84        converter.putLong(8, lsb);
85        return converter.array();
86    }
87
88    public static byte[] uuidsToByteArray(ParcelUuid[] uuids) {
89        int length = uuids.length * BD_UUID_LEN;
90        ByteBuffer converter = ByteBuffer.allocate(length);
91        converter.order(ByteOrder.BIG_ENDIAN);
92        UUID uuid;
93        long msb, lsb;
94        for (int i = 0; i < uuids.length; i++) {
95            uuid = uuids[i].getUuid();
96            msb = uuid.getMostSignificantBits();
97            lsb = uuid.getLeastSignificantBits();
98            converter.putLong(i * 16, msb);
99            converter.putLong(i * 16 + 8, lsb);
100        }
101        return converter.array();
102    }
103
104    public static ParcelUuid[] byteArrayToUuid(byte[] val) {
105        int numUuids = val.length/BD_UUID_LEN;
106        ParcelUuid[] puuids = new ParcelUuid[numUuids];
107        UUID uuid;
108        int offset = 0;
109
110        ByteBuffer converter = ByteBuffer.wrap(val);
111        converter.order(ByteOrder.BIG_ENDIAN);
112
113        for (int i = 0; i < numUuids; i++) {
114            puuids[i] = new ParcelUuid(new UUID(converter.getLong(offset),
115                    converter.getLong(offset + 8)));
116            offset += 16;
117        }
118        return puuids;
119    }
120
121    public static String debugGetAdapterStateString(int state) {
122        switch (state) {
123            case BluetoothAdapter.STATE_OFF : return "STATE_OFF";
124            case BluetoothAdapter.STATE_ON : return "STATE_ON";
125            case BluetoothAdapter.STATE_TURNING_ON : return "STATE_TURNING_ON";
126            case BluetoothAdapter.STATE_TURNING_OFF : return "STATE_TURNING_OFF";
127            default : return "UNKNOWN";
128        }
129    }
130}
131