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1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef DEVICE_GEOLOCATION_WIFI_DATA_H_ | |
6 #define DEVICE_GEOLOCATION_WIFI_DATA_H_ | |
7 | |
8 #include <set> | |
9 | |
10 #include "base/strings/string16.h" | |
11 #include "device/geolocation/geolocation_export.h" | |
12 | |
13 namespace device { | |
14 | |
15 // Wifi data relating to a single access point. | |
16 struct DEVICE_GEOLOCATION_EXPORT AccessPointData { | |
17 AccessPointData(); | |
18 ~AccessPointData(); | |
19 | |
20 // MAC address, formatted as per MacAddressAsString16. | |
21 base::string16 mac_address; | |
22 int radio_signal_strength; // Measured in dBm | |
23 int channel; | |
24 int signal_to_noise; // Ratio in dB | |
25 base::string16 ssid; // Network identifier | |
26 }; | |
27 | |
28 // This is to allow AccessPointData to be used in std::set. We order | |
29 // lexicographically by MAC address. | |
30 struct AccessPointDataLess { | |
31 bool operator()(const AccessPointData& data1, | |
32 const AccessPointData& data2) const { | |
33 return data1.mac_address < data2.mac_address; | |
34 } | |
35 }; | |
36 | |
37 // All data for wifi. | |
38 struct DEVICE_GEOLOCATION_EXPORT WifiData { | |
39 WifiData(); | |
40 WifiData(const WifiData& other); | |
41 ~WifiData(); | |
42 | |
43 // Determines whether a new set of WiFi data differs significantly from this. | |
44 bool DiffersSignificantly(const WifiData& other) const; | |
45 | |
46 // Store access points as a set, sorted by MAC address. This allows quick | |
47 // comparison of sets for detecting changes and for caching. | |
48 typedef std::set<AccessPointData, AccessPointDataLess> AccessPointDataSet; | |
49 AccessPointDataSet access_point_data; | |
50 }; | |
51 | |
52 } // namespace device | |
53 | |
54 #endif // DEVICE_GEOLOCATION_WIFI_DATA_H_ | |
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