Robin Lee | cfe2669 | 2016-04-05 12:19:06 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include <memory> |
| 18 | |
| 19 | #include <binder/Parcel.h> |
| 20 | |
| 21 | #include "UidRangeTest.h" |
| 22 | |
| 23 | using android::net::UidRange; |
| 24 | |
| 25 | extern "C" |
| 26 | JNIEXPORT jbyteArray Java_android_net_UidRangeTest_readAndWriteNative(JNIEnv* env, jclass, |
| 27 | jbyteArray inParcel) { |
| 28 | const UidRange range = unmarshall(env, inParcel); |
| 29 | return marshall(env, range); |
| 30 | } |
| 31 | |
| 32 | extern "C" |
| 33 | JNIEXPORT jint Java_android_net_UidRangeTest_getStart(JNIEnv* env, jclass, jbyteArray inParcel) { |
| 34 | const UidRange range = unmarshall(env, inParcel); |
| 35 | return range.getStart(); |
| 36 | } |
| 37 | |
| 38 | extern "C" |
| 39 | JNIEXPORT jint Java_android_net_UidRangeTest_getStop(JNIEnv* env, jclass, jbyteArray inParcel) { |
| 40 | const UidRange range = unmarshall(env, inParcel); |
| 41 | return range.getStop(); |
| 42 | } |
| 43 | |
| 44 | |
| 45 | /** |
| 46 | * Reads exactly one UidRange from 'parcelData' assuming that it is a Parcel. Any bytes afterward |
| 47 | * are ignored. |
| 48 | */ |
| 49 | UidRange unmarshall(JNIEnv* env, jbyteArray parcelData) { |
| 50 | const int length = env->GetArrayLength(parcelData); |
| 51 | |
| 52 | std::unique_ptr<uint8_t> bytes(new uint8_t[length]); |
| 53 | env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get())); |
| 54 | |
| 55 | android::Parcel p; |
| 56 | p.setData(bytes.get(), length); |
| 57 | |
| 58 | UidRange range; |
| 59 | range.readFromParcel(&p); |
| 60 | return range; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Creates a Java byte[] array and writes the contents of 'range' to it as a Parcel containing |
| 65 | * exactly one object. |
| 66 | * |
| 67 | * Every UidRange maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and |
| 68 | * 'unmarshall(e, marshall(e, x))' should be fixed points. |
| 69 | */ |
| 70 | jbyteArray marshall(JNIEnv* env, const UidRange& range) { |
| 71 | android::Parcel p; |
| 72 | range.writeToParcel(&p); |
| 73 | const int length = p.dataSize(); |
| 74 | |
| 75 | jbyteArray parcelData = env->NewByteArray(length); |
| 76 | env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data())); |
| 77 | |
| 78 | return parcelData; |
| 79 | } |