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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/android/apk_assets.h"
#include <jni.h>
#include "base/android/jni_array.h"
#include "base/android/jni_string.h"
#include "base/android/scoped_java_ref.h"
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/file_descriptor_store.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "base/base_jni/ApkAssets_jni.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, file_path, 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;
}
void DumpLastOpenApkAssetFailure() {
JNIEnv* env = base::android::AttachCurrentThread();
std::string error = Java_ApkAssets_takeLastErrorString(env);
if (error.empty()) {
return;
}
SCOPED_CRASH_KEY_STRING256("base", "OpenApkAssetError", error);
base::debug::DumpWithoutCrashing();
}
} // namespace android
} // namespace base
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