libbinder_ndk: AParcel_fromJavaParcel
This allows creating a view into a Java Parcel. Note, that this doesn't
allow conversions of both directions. This is mostly out of convenience:
Parcel.obtain(long) only allows us to create a view. Also, there isn't
currently a usecase for this other API.
Bug: 145227478
Test: atest CtsNdkBinderTestCases
Change-Id: Iec043741ec778036e167aaf9a2fb275d4309e8f6
diff --git a/libs/binder/ndk/parcel_jni.cpp b/libs/binder/ndk/parcel_jni.cpp
new file mode 100644
index 0000000..53b2d7c
--- /dev/null
+++ b/libs/binder/ndk/parcel_jni.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2020 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 <android/binder_parcel_jni.h>
+#include "parcel_internal.h"
+
+#include <android_os_Parcel.h>
+
+using ::android::Parcel;
+using ::android::parcelForJavaObject;
+
+AParcel* AParcel_fromJavaParcel(JNIEnv* env, jobject jbinder) {
+ if (jbinder == nullptr) {
+ return nullptr;
+ }
+
+ Parcel* parcel = parcelForJavaObject(env, jbinder);
+
+ if (parcel == nullptr) {
+ return nullptr;
+ }
+
+ return new AParcel(nullptr /*binder*/, parcel, false /*shouldOwn*/);
+}