/*
 *  Copyright 2015 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#include "sdk/android/src/jni/jni_helpers.h"

#include <vector>

#include "sdk/android/native_api/jni/java_types.h"

namespace webrtc {
namespace jni {

// Return a |jlong| that will correctly convert back to |ptr|.  This is needed
// because the alternative (of silently passing a 32-bit pointer to a vararg
// function expecting a 64-bit param) picks up garbage in the high 32 bits.
jlong jlongFromPointer(void* ptr) {
  static_assert(sizeof(intptr_t) <= sizeof(jlong),
                "Time to rethink the use of jlongs");
  // Going through intptr_t to be obvious about the definedness of the
  // conversion from pointer to integral type.  intptr_t to jlong is a standard
  // widening by the static_assert above.
  jlong ret = reinterpret_cast<intptr_t>(ptr);
  RTC_DCHECK(reinterpret_cast<void*>(ret) == ptr);
  return ret;
}

ScopedJavaLocalRef<jobject> NewDirectByteBuffer(JNIEnv* env,
                                                void* address,
                                                jlong capacity) {
  ScopedJavaLocalRef<jobject> buffer(
      env, env->NewDirectByteBuffer(address, capacity));
  CHECK_EXCEPTION(env) << "error NewDirectByteBuffer";
  return buffer;
}

jobject NewGlobalRef(JNIEnv* jni, jobject o) {
  jobject ret = jni->NewGlobalRef(o);
  CHECK_EXCEPTION(jni) << "error during NewGlobalRef";
  RTC_CHECK(ret);
  return ret;
}

void DeleteGlobalRef(JNIEnv* jni, jobject o) {
  jni->DeleteGlobalRef(o);
  CHECK_EXCEPTION(jni) << "error during DeleteGlobalRef";
}

// Scope Java local references to the lifetime of this object.  Use in all C++
// callbacks (i.e. entry points that don't originate in a Java callstack
// through a "native" method call).
ScopedLocalRefFrame::ScopedLocalRefFrame(JNIEnv* jni) : jni_(jni) {
  RTC_CHECK(!jni_->PushLocalFrame(0)) << "Failed to PushLocalFrame";
}
ScopedLocalRefFrame::~ScopedLocalRefFrame() {
  jni_->PopLocalFrame(nullptr);
}

}  // namespace jni
}  // namespace webrtc