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/*
* Copyright (C) 2016 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 <memory>
#include <binder/Parcel.h>
#include "UidRangeTest.h"
using android::net::UidRange;
extern "C"
JNIEXPORT jbyteArray Java_android_net_UidRangeTest_readAndWriteNative(JNIEnv* env, jclass,
jbyteArray inParcel) {
const UidRange range = unmarshall(env, inParcel);
return marshall(env, range);
}
extern "C"
JNIEXPORT jint Java_android_net_UidRangeTest_getStart(JNIEnv* env, jclass, jbyteArray inParcel) {
const UidRange range = unmarshall(env, inParcel);
return range.getStart();
}
extern "C"
JNIEXPORT jint Java_android_net_UidRangeTest_getStop(JNIEnv* env, jclass, jbyteArray inParcel) {
const UidRange range = unmarshall(env, inParcel);
return range.getStop();
}
/**
* Reads exactly one UidRange from 'parcelData' assuming that it is a Parcel. Any bytes afterward
* are ignored.
*/
UidRange unmarshall(JNIEnv* env, jbyteArray parcelData) {
const int length = env->GetArrayLength(parcelData);
std::unique_ptr<uint8_t> bytes(new uint8_t[length]);
env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get()));
android::Parcel p;
p.setData(bytes.get(), length);
UidRange range;
range.readFromParcel(&p);
return range;
}
/**
* Creates a Java byte[] array and writes the contents of 'range' to it as a Parcel containing
* exactly one object.
*
* Every UidRange maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and
* 'unmarshall(e, marshall(e, x))' should be fixed points.
*/
jbyteArray marshall(JNIEnv* env, const UidRange& range) {
android::Parcel p;
range.writeToParcel(&p);
const int length = p.dataSize();
jbyteArray parcelData = env->NewByteArray(length);
env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data()));
return parcelData;
}
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