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/*
* 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 <stdint.h>
#include <sys/types.h>
#include <utils/Errors.h>
#include <utils/String8.h>
#include <utils/Flattenable.h>
#include <hardware/sensors.h>
#include <gui/Sensor.h>
// ----------------------------------------------------------------------------
namespace android {
// ----------------------------------------------------------------------------
Sensor::Sensor()
: mHandle(0), mType(0),
mMinValue(0), mMaxValue(0), mResolution(0),
mPower(0), mMinDelay(0)
{
}
Sensor::Sensor(struct sensor_t const* hwSensor)
{
mName = hwSensor->name;
mVendor = hwSensor->vendor;
mHandle = hwSensor->handle;
mType = hwSensor->type;
mMinValue = 0; // FIXME: minValue
mMaxValue = hwSensor->maxRange; // FIXME: maxValue
mResolution = hwSensor->resolution;
mPower = hwSensor->power;
mMinDelay = hwSensor->minDelay;
}
Sensor::~Sensor()
{
}
const String8& Sensor::getName() const {
return mName;
}
const String8& Sensor::getVendor() const {
return mVendor;
}
int32_t Sensor::getHandle() const {
return mHandle;
}
int32_t Sensor::getType() const {
return mType;
}
float Sensor::getMinValue() const {
return mMinValue;
}
float Sensor::getMaxValue() const {
return mMaxValue;
}
float Sensor::getResolution() const {
return mResolution;
}
float Sensor::getPowerUsage() const {
return mPower;
}
int32_t Sensor::getMinDelay() const {
return mMinDelay;
}
nsecs_t Sensor::getMinDelayNs() const {
return getMinDelay() * 1000;
}
int32_t Sensor::getVersion() const {
return mVersion;
}
size_t Sensor::getFlattenedSize() const
{
return sizeof(int32_t) + ((mName.length() + 3) & ~3) +
sizeof(int32_t) + ((mVendor.length() + 3) & ~3) +
sizeof(int32_t) * 2 +
sizeof(float) * 4 +
sizeof(int32_t);
}
size_t Sensor::getFdCount() const
{
return 0;
}
static inline
size_t write(void* buffer, size_t offset, const String8& value) {
memcpy(static_cast<char*>(buffer) + offset, value.string(), value.length());
return (value.length() + 3) & ~3;
}
static inline
size_t write(void* buffer, size_t offset, float value) {
*reinterpret_cast<float*>(static_cast<char*>(buffer) + offset) = value;
return sizeof(float);
}
static inline
size_t write(void* buffer, size_t offset, int32_t value) {
*reinterpret_cast<int32_t*>(static_cast<char*>(buffer) + offset) = value;
return sizeof(int32_t);
}
status_t Sensor::flatten(void* buffer, size_t size,
int fds[], size_t count) const
{
if (size < Sensor::getFlattenedSize())
return -ENOMEM;
size_t offset = 0;
offset += write(buffer, offset, int32_t(mName.length()));
offset += write(buffer, offset, mName);
offset += write(buffer, offset, int32_t(mVendor.length()));
offset += write(buffer, offset, mVendor);
offset += write(buffer, offset, mHandle);
offset += write(buffer, offset, mType);
offset += write(buffer, offset, mMinValue);
offset += write(buffer, offset, mMaxValue);
offset += write(buffer, offset, mResolution);
offset += write(buffer, offset, mPower);
offset += write(buffer, offset, mMinDelay);
return NO_ERROR;
}
static inline
size_t read(void const* buffer, size_t offset, String8* value, int32_t len) {
value->setTo(static_cast<char const*>(buffer) + offset, len);
return (len + 3) & ~3;
}
static inline
size_t read(void const* buffer, size_t offset, float* value) {
*value = *reinterpret_cast<float const*>(static_cast<char const*>(buffer) + offset);
return sizeof(float);
}
static inline
size_t read(void const* buffer, size_t offset, int32_t* value) {
*value = *reinterpret_cast<int32_t const*>(static_cast<char const*>(buffer) + offset);
return sizeof(int32_t);
}
status_t Sensor::unflatten(void const* buffer, size_t size,
int fds[], size_t count)
{
int32_t len;
size_t offset = 0;
offset += read(buffer, offset, &len);
offset += read(buffer, offset, &mName, len);
offset += read(buffer, offset, &len);
offset += read(buffer, offset, &mVendor, len);
offset += read(buffer, offset, &mHandle);
offset += read(buffer, offset, &mType);
offset += read(buffer, offset, &mMinValue);
offset += read(buffer, offset, &mMaxValue);
offset += read(buffer, offset, &mResolution);
offset += read(buffer, offset, &mPower);
offset += read(buffer, offset, &mMinDelay);
return NO_ERROR;
}
// ----------------------------------------------------------------------------
}; // namespace android
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