1 // Copyright 2015 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include <jni.h> 6 7 #include "base/android/apk_assets.h" 8 9 #include "base/android/context_utils.h" 10 #include "base/android/jni_array.h" 11 #include "base/android/jni_string.h" 12 #include "base/android/scoped_java_ref.h" 13 #include "jni/ApkAssets_jni.h" 14 15 namespace base { 16 namespace android { 17 18 bool RegisterApkAssets(JNIEnv* env) { 19 return RegisterNativesImpl(env); 20 } 21 22 int OpenApkAsset(const std::string& file_path, 23 base::MemoryMappedFile::Region* region) { 24 // The AAssetManager API of the NDK is does not expose a method for accessing 25 // raw resources :(. 26 JNIEnv* env = base::android::AttachCurrentThread(); 27 ScopedJavaLocalRef<jlongArray> jarr = Java_ApkAssets_open( 28 env, 29 base::android::GetApplicationContext(), 30 base::android::ConvertUTF8ToJavaString(env, file_path).obj()); 31 std::vector<jlong> results; 32 base::android::JavaLongArrayToLongVector(env, jarr.obj(), &results); 33 CHECK_EQ(3U, results.size()); 34 int fd = static_cast<int>(results[0]); 35 region->offset = results[1]; 36 region->size = results[2]; 37 return fd; 38 } 39 40 bool RegisterApkAssetWithGlobalDescriptors(base::GlobalDescriptors::Key key, 41 const std::string& file_path) { 42 base::MemoryMappedFile::Region region = 43 base::MemoryMappedFile::Region::kWholeFile; 44 int asset_fd = OpenApkAsset(file_path, ®ion); 45 if (asset_fd != -1) { 46 base::GlobalDescriptors::GetInstance()->Set(key, asset_fd, region); 47 } 48 return asset_fd != -1; 49 } 50 51 } // namespace android 52 } // namespace base 53
