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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <jni.h>
#include "base/android/apk_assets.h"
#include "base/android/context_utils.h"
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "jni/ApkAssets_jni.h"
namespace base {
namespace android {
bool RegisterApkAssets(JNIEnv* env) {
return RegisterNativesImpl(env);
}
int OpenApkAsset(const std::string& file_path,
base::MemoryMappedFile::Region* region) {
// The AAssetManager API of the NDK is does not expose a method for accessing
// raw resources :(.
JNIEnv* env = base::android::AttachCurrentThread();
ScopedJavaLocalRef<jlongArray> jarr = Java_ApkAssets_open(
env,
base::android::GetApplicationContext(),
base::android::ConvertUTF8ToJavaString(env, file_path).obj());
std::vector<jlong> results;
base::android::JavaLongArrayToLongVector(env, jarr.obj(), &results);
CHECK_EQ(3U, results.size());
int fd = static_cast<int>(results[0]);
region->offset = results[1];
region->size = results[2];
return fd;
}
bool RegisterApkAssetWithGlobalDescriptors(base::GlobalDescriptors::Key key,
const std::string& file_path) {
base::MemoryMappedFile::Region region =
base::MemoryMappedFile::Region::kWholeFile;
int asset_fd = OpenApkAsset(file_path, ®ion);
if (asset_fd != -1) {
base::GlobalDescriptors::GetInstance()->Set(key, asset_fd, region);
}
return asset_fd != -1;
}
} // namespace android
} // namespace base
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