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      1 // Copyright 2014 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 "android_webview/native/aw_assets.h"
      8 
      9 #include "base/android/jni_array.h"
     10 #include "base/android/jni_string.h"
     11 #include "base/android/scoped_java_ref.h"
     12 #include "jni/AwAssets_jni.h"
     13 
     14 namespace android_webview {
     15 namespace AwAssets {
     16 
     17 bool OpenAsset(const std::string& filename,
     18                int* fd,
     19                int64* offset,
     20                int64* size) {
     21   JNIEnv* env = base::android::AttachCurrentThread();
     22   ScopedJavaLocalRef<jlongArray> jarr = Java_AwAssets_openAsset(
     23       env,
     24       base::android::GetApplicationContext(),
     25       base::android::ConvertUTF8ToJavaString(env, filename).Release());
     26   std::vector<long> results;
     27   base::android::JavaLongArrayToLongVector(env, jarr.obj(), &results);
     28   DCHECK_EQ(3U, results.size());
     29   *fd = static_cast<int>(results[0]);
     30   *offset = results[1];
     31   *size = results[2];
     32   return *fd != -1;
     33 }
     34 
     35 }  // namespace AwAssets
     36 
     37 bool RegisterAwAssets(JNIEnv* env) {
     38   return RegisterNativesImpl(env);
     39 }
     40 
     41 }  // namespace android_webview
     42