Divide huge SensorService files into managable pieces

Splitted SensorService.cpp and SensorService.h into smaller more
manageable pieces with the embedded classes/structs now in individual
files.

Change-Id: I5e75c41b9e0e5c9aff102fe4b0f142c61d1203e2
diff --git a/services/sensorservice/MostRecentEventLogger.cpp b/services/sensorservice/MostRecentEventLogger.cpp
new file mode 100644
index 0000000..0bd0e17
--- /dev/null
+++ b/services/sensorservice/MostRecentEventLogger.cpp
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+#include "MostRecentEventLogger.h"
+
+namespace android {
+
+SensorService::MostRecentEventLogger::MostRecentEventLogger(int sensorType) :
+        mSensorType(sensorType), mNextInd(0) {
+
+    mBufSize = (sensorType == SENSOR_TYPE_STEP_COUNTER ||
+                sensorType == SENSOR_TYPE_SIGNIFICANT_MOTION ||
+                sensorType == SENSOR_TYPE_ACCELEROMETER) ? LOG_SIZE : LOG_SIZE_LARGE;
+
+    mTrimmedSensorEventArr = new TrimmedSensorEvent *[mBufSize];
+    mSensorType = sensorType;
+    for (int i = 0; i < mBufSize; ++i) {
+        mTrimmedSensorEventArr[i] = new TrimmedSensorEvent(mSensorType);
+    }
+}
+
+void SensorService::MostRecentEventLogger::addEvent(const sensors_event_t& event) {
+    TrimmedSensorEvent *curr_event = mTrimmedSensorEventArr[mNextInd];
+    curr_event->mTimestamp = event.timestamp;
+    if (mSensorType == SENSOR_TYPE_STEP_COUNTER) {
+        curr_event->mStepCounter = event.u64.step_counter;
+    } else {
+        memcpy(curr_event->mData, event.data,
+                 sizeof(float) * SensorService::getNumEventsForSensorType(mSensorType));
+    }
+    time_t rawtime = time(NULL);
+    struct tm * timeinfo = localtime(&rawtime);
+    curr_event->mHour = timeinfo->tm_hour;
+    curr_event->mMin = timeinfo->tm_min;
+    curr_event->mSec = timeinfo->tm_sec;
+    mNextInd = (mNextInd + 1) % mBufSize;
+}
+
+void SensorService::MostRecentEventLogger::printBuffer(String8& result) const {
+    const int numData = SensorService::getNumEventsForSensorType(mSensorType);
+    int i = mNextInd, eventNum = 1;
+    result.appendFormat("last %d events = < ", mBufSize);
+    do {
+        if (TrimmedSensorEvent::isSentinel(*mTrimmedSensorEventArr[i])) {
+            // Sentinel, ignore.
+            i = (i + 1) % mBufSize;
+            continue;
+        }
+        result.appendFormat("%d) ", eventNum++);
+        if (mSensorType == SENSOR_TYPE_STEP_COUNTER) {
+            result.appendFormat("%llu,", mTrimmedSensorEventArr[i]->mStepCounter);
+        } else {
+            for (int j = 0; j < numData; ++j) {
+                result.appendFormat("%5.1f,", mTrimmedSensorEventArr[i]->mData[j]);
+            }
+        }
+        result.appendFormat("%lld %02d:%02d:%02d ", mTrimmedSensorEventArr[i]->mTimestamp,
+                mTrimmedSensorEventArr[i]->mHour, mTrimmedSensorEventArr[i]->mMin,
+                mTrimmedSensorEventArr[i]->mSec);
+        i = (i + 1) % mBufSize;
+    } while (i != mNextInd);
+    result.appendFormat(">\n");
+}
+
+bool SensorService::MostRecentEventLogger::populateLastEvent(sensors_event_t *event) {
+    int lastEventInd = (mNextInd - 1 + mBufSize) % mBufSize;
+    // Check if the buffer is empty.
+    if (TrimmedSensorEvent::isSentinel(*mTrimmedSensorEventArr[lastEventInd])) {
+        return false;
+    }
+    event->version = sizeof(sensors_event_t);
+    event->type = mSensorType;
+    event->timestamp = mTrimmedSensorEventArr[lastEventInd]->mTimestamp;
+    if (mSensorType == SENSOR_TYPE_STEP_COUNTER) {
+          event->u64.step_counter = mTrimmedSensorEventArr[lastEventInd]->mStepCounter;
+    } else {
+        memcpy(event->data, mTrimmedSensorEventArr[lastEventInd]->mData,
+                 sizeof(float) * SensorService::getNumEventsForSensorType(mSensorType));
+    }
+    return true;
+}
+
+SensorService::MostRecentEventLogger::~MostRecentEventLogger() {
+    for (int i = 0; i < mBufSize; ++i) {
+        delete mTrimmedSensorEventArr[i];
+    }
+    delete [] mTrimmedSensorEventArr;
+}
+
+// -----------------------------------------------------------------------------
+SensorService::MostRecentEventLogger::TrimmedSensorEvent::TrimmedSensorEvent(int sensorType) {
+    mTimestamp = -1;
+    const int numData = SensorService::getNumEventsForSensorType(sensorType);
+    if (sensorType == SENSOR_TYPE_STEP_COUNTER) {
+        mStepCounter = 0;
+    } else {
+        mData = new float[numData];
+        for (int i = 0; i < numData; ++i) {
+            mData[i] = -1.0;
+        }
+    }
+    mHour = mMin = mSec = INT32_MIN;
+}
+
+bool SensorService::MostRecentEventLogger::TrimmedSensorEvent::
+    isSentinel(const TrimmedSensorEvent& event) {
+    return (event.mHour == INT32_MIN && event.mMin == INT32_MIN && event.mSec == INT32_MIN);
+}
+
+} // namespace android