Refactor SensorEventsChecker

Move SensorEventsChecker and derived classes into their own file.

Bug: 111070257
Test: Builds and passes VtsHalSensorsV1_0Target tests
Change-Id: I1d41c6edd71e6970ee0599ae21667c88dd5f1c4e

1 files changed, 78 insertions, 0 deletions

diff --git a/sensors/common/vts/utils/include/sensors-vts-utils/SensorEventsChecker.h b/sensors/common/vts/utils/include/sensors-vts-utils/SensorEventsChecker.h
new file mode 100644
index 0000000000..b5daccc987
--- /dev/null
+++ b/sensors/common/vts/utils/include/sensors-vts-utils/SensorEventsChecker.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#ifndef ANDROID_SENSOR_EVENTS_CHECKER_H
+#define ANDROID_SENSOR_EVENTS_CHECKER_H
+
+#include <android/hardware/sensors/1.0/types.h>
+
+#include <cmath>
+
+class SensorEventsChecker {
+   public:
+    using Event = ::android::hardware::sensors::V1_0::Event;
+    virtual bool check(const std::vector<Event>& events, std::string* out) const = 0;
+    virtual ~SensorEventsChecker() {}
+};
+
+class NullChecker : public SensorEventsChecker {
+   public:
+    virtual bool check(const std::vector<Event>&, std::string*) const { return true; }
+};
+
+class SensorEventPerEventChecker : public SensorEventsChecker {
+   public:
+    virtual bool checkEvent(const Event& event, std::string* out) const = 0;
+    virtual bool check(const std::vector<Event>& events, std::string* out) const {
+        for (const auto& e : events) {
+            if (!checkEvent(e, out)) {
+                return false;
+            }
+        }
+        return true;
+    }
+};
+
+class Vec3NormChecker : public SensorEventPerEventChecker {
+   public:
+    Vec3NormChecker(float min, float max) : mLowerLimit(min), mUpperLimit(max) {}
+    static Vec3NormChecker byNominal(float nominal, float allowedError) {
+        return Vec3NormChecker(nominal - allowedError, nominal + allowedError);
+    }
+
+    virtual bool checkEvent(const Event& event, std::string* out) const {
+        android::hardware::sensors::V1_0::Vec3 v = event.u.vec3;
+        float norm = std::sqrt(v.x * v.x + v.y * v.y + v.z * v.z);
+        if (norm < mLowerLimit || norm > mUpperLimit) {
+            if (out != nullptr) {
+                std::ostringstream ss;
+                ss << "Event @ " << event.timestamp << " (" << v.x << ", " << v.y << ", " << v.z
+                   << ")"
+                   << " has norm " << norm << ", which is beyond range"
+                   << " [" << mLowerLimit << ", " << mUpperLimit << "]";
+                *out = ss.str();
+            }
+            return false;
+        }
+        return true;
+    }
+
+   protected:
+    float mLowerLimit;
+    float mUpperLimit;
+};
+
+#endif  // ANDROID_SENSOR_EVENTS_CHECKER_H
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