80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <memory>
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#include <binder/Parcel.h>
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#include "UidRangeTest.h"
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using android::net::UidRange;
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extern "C"
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JNIEXPORT jbyteArray Java_android_net_UidRangeTest_readAndWriteNative(JNIEnv* env, jclass,
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jbyteArray inParcel) {
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const UidRange range = unmarshall(env, inParcel);
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return marshall(env, range);
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}
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extern "C"
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JNIEXPORT jint Java_android_net_UidRangeTest_getStart(JNIEnv* env, jclass, jbyteArray inParcel) {
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const UidRange range = unmarshall(env, inParcel);
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return range.getStart();
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}
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extern "C"
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JNIEXPORT jint Java_android_net_UidRangeTest_getStop(JNIEnv* env, jclass, jbyteArray inParcel) {
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const UidRange range = unmarshall(env, inParcel);
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return range.getStop();
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}
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/**
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* Reads exactly one UidRange from 'parcelData' assuming that it is a Parcel. Any bytes afterward
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* are ignored.
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*/
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UidRange unmarshall(JNIEnv* env, jbyteArray parcelData) {
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const int length = env->GetArrayLength(parcelData);
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std::unique_ptr<uint8_t> bytes(new uint8_t[length]);
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env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get()));
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android::Parcel p;
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p.setData(bytes.get(), length);
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UidRange range;
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range.readFromParcel(&p);
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return range;
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}
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/**
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* Creates a Java byte[] array and writes the contents of 'range' to it as a Parcel containing
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* exactly one object.
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*
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* Every UidRange maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and
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* 'unmarshall(e, marshall(e, x))' should be fixed points.
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*/
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jbyteArray marshall(JNIEnv* env, const UidRange& range) {
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android::Parcel p;
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range.writeToParcel(&p);
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const int length = p.dataSize();
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jbyteArray parcelData = env->NewByteArray(length);
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env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data()));
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return parcelData;
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}
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