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