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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/jni_array.h"
- #include "base/android/jni_string.h"
- #include "base/android/scoped_java_ref.h"
- #include "base/base_jni_headers/ApkAssets_jni.h"
- #include "base/file_descriptor_store.h"
- namespace base {
- namespace android {
- int OpenApkAsset(const std::string& file_path,
- const std::string& split_name,
- base::MemoryMappedFile::Region* region) {
- // The AssetManager API of the NDK does not expose a method for accessing raw
- // resources :(
- JNIEnv* env = base::android::AttachCurrentThread();
- ScopedJavaLocalRef<jlongArray> jarr =
- Java_ApkAssets_open(env, ConvertUTF8ToJavaString(env, file_path),
- ConvertUTF8ToJavaString(env, split_name));
- std::vector<jlong> results;
- base::android::JavaLongArrayToLongVector(env, jarr, &results);
- CHECK_EQ(3U, results.size());
- int fd = static_cast<int>(results[0]);
- region->offset = results[1];
- // Not a checked_cast because open() may return -1.
- region->size = static_cast<size_t>(results[2]);
- return fd;
- }
- int OpenApkAsset(const std::string& file_path,
- base::MemoryMappedFile::Region* region) {
- return OpenApkAsset(file_path, std::string(), region);
- }
- bool RegisterApkAssetWithFileDescriptorStore(const std::string& key,
- const base::FilePath& file_path) {
- base::MemoryMappedFile::Region region =
- base::MemoryMappedFile::Region::kWholeFile;
- int asset_fd = OpenApkAsset(file_path.value(), ®ion);
- if (asset_fd == -1)
- return false;
- base::FileDescriptorStore::GetInstance().Set(key, base::ScopedFD(asset_fd),
- region);
- return true;
- }
- } // namespace android
- } // namespace base
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