1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef android_hardware_automotive_vehicle_V2_0_Obd2SensorStore_H_
18 #define android_hardware_automotive_vehicle_V2_0_Obd2SensorStore_H_
19 
20 #include <vector>
21 
22 #include <android/hardware/automotive/vehicle/2.0/types.h>
23 
24 namespace android {
25 namespace hardware {
26 namespace automotive {
27 namespace vehicle {
28 namespace V2_0 {
29 
30 // This class wraps all the logic required to create an OBD2 frame.
31 // It allows storing sensor values, setting appropriate bitmasks as needed,
32 // and returning appropriately laid out storage of sensor values suitable
33 // for being returned via a VehicleHal implementation.
34 class Obd2SensorStore {
35    public:
36     // Creates a sensor storage with a given number of vendor-specific sensors.
37     Obd2SensorStore(size_t numVendorIntegerSensors, size_t numVendorFloatSensors);
38 
39     // Stores an integer-valued sensor.
40     StatusCode setIntegerSensor(DiagnosticIntegerSensorIndex index, int32_t value);
41     // Stores an integer-valued sensor.
42     StatusCode setIntegerSensor(size_t index, int32_t value);
43 
44     // Stores a float-valued sensor.
45     StatusCode setFloatSensor(DiagnosticFloatSensorIndex index, float value);
46     // Stores a float-valued sensor.
47     StatusCode setFloatSensor(size_t index, float value);
48 
49     // Returns a vector that contains all integer sensors stored.
50     const std::vector<int32_t>& getIntegerSensors() const;
51     // Returns a vector that contains all float sensors stored.
52     const std::vector<float>& getFloatSensors() const;
53     // Returns a vector that contains a bitmask for all stored sensors.
54     const std::vector<uint8_t>& getSensorsBitmask() const;
55 
56     // Given a stringValue, fill in a VehiclePropValue
57     void fillPropValue(const std::string& dtc, VehiclePropValue* propValue) const;
58 
59    private:
60     class BitmaskInVector {
61        public:
62         BitmaskInVector(size_t numBits = 0);
63         void resize(size_t numBits);
64         bool get(size_t index) const;
65         void set(size_t index, bool value);
66 
67         const std::vector<uint8_t>& getBitmask() const;
68 
69        private:
70         std::vector<uint8_t> mStorage;
71     };
72 
73     std::vector<int32_t> mIntegerSensors;
74     std::vector<float> mFloatSensors;
75     BitmaskInVector mSensorsBitmask;
76 };
77 
78 }  // namespace V2_0
79 }  // namespace vehicle
80 }  // namespace automotive
81 }  // namespace hardware
82 }  // namespace android
83 
84 #endif  // android_hardware_automotive_vehicle_V2_0_Obd2SensorStore_H_
85