1/*
2 * Copyright (C) 2017 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 "LowpanBeaconInfoTest.h"
22
23using android::net::lowpan::LowpanBeaconInfo;
24
25/**
26 * Reads exactly one LowpanBeaconInfo from 'parcelData' assuming that it is a Parcel. Any bytes afterward
27 * are ignored.
28 */
29static LowpanBeaconInfo unmarshall(JNIEnv* env, jbyteArray parcelData) {
30    const int length = env->GetArrayLength(parcelData);
31
32    std::unique_ptr<uint8_t> bytes(new uint8_t[length]);
33    env->GetByteArrayRegion(parcelData, 0, length, reinterpret_cast<jbyte*>(bytes.get()));
34
35    android::Parcel p;
36    p.setData(bytes.get(), length);
37
38    LowpanBeaconInfo value;
39    value.readFromParcel(&p);
40    return value;
41}
42
43/**
44 * Creates a Java byte[] array and writes the contents of 'addr' to it as a Parcel containing
45 * exactly one object.
46 *
47 * Every LowpanBeaconInfo maps to a unique parcel object, so both 'marshall(e, unmarshall(e, x))' and
48 * 'unmarshall(e, marshall(e, x))' should be fixed points.
49 */
50static jbyteArray marshall(JNIEnv* env, const LowpanBeaconInfo& addr) {
51    android::Parcel p;
52    addr.writeToParcel(&p);
53    const int length = p.dataSize();
54
55    jbyteArray parcelData = env->NewByteArray(length);
56    env->SetByteArrayRegion(parcelData, 0, length, reinterpret_cast<const jbyte*>(p.data()));
57
58    return parcelData;
59}
60
61extern "C"
62JNIEXPORT jbyteArray Java_android_net_lowpan_LowpanBeaconInfoTest_readAndWriteNative(JNIEnv* env, jclass,
63        jbyteArray inParcel) {
64    const LowpanBeaconInfo value = unmarshall(env, inParcel);
65    return marshall(env, value);
66}
67