dom/push/PushUtil.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/PushUtil.h"
   8 #include "mozilla/dom/UnionTypes.h"
   9
  10 namespace mozilla {
  11 namespace dom {
  12
  13 /* static */
  14 bool PushUtil::CopyArrayBufferToArray(const ArrayBuffer& aBuffer,
  15                                       nsTArray<uint8_t>& aArray) {
  16   MOZ_ASSERT(aArray.IsEmpty());
  17   aBuffer.ComputeState();
  18   return aArray.SetCapacity(aBuffer.Length(), fallible) &&
  19          aArray.InsertElementsAt(0, aBuffer.Data(), aBuffer.Length(), fallible);
  20 }
  21
  22 /* static */
  23 bool PushUtil::CopyArrayBufferViewToArray(const ArrayBufferView& aView,
  24                                           nsTArray<uint8_t>& aArray) {
  25   MOZ_ASSERT(aArray.IsEmpty());
  26   aView.ComputeState();
  27   return aArray.SetCapacity(aView.Length(), fallible) &&
  28          aArray.InsertElementsAt(0, aView.Data(), aView.Length(), fallible);
  29 }
  30
  31 /* static */
  32 bool PushUtil::CopyBufferSourceToArray(
  33     const OwningArrayBufferViewOrArrayBuffer& aSource,
  34     nsTArray<uint8_t>& aArray) {
  35   if (aSource.IsArrayBuffer()) {
  36     return CopyArrayBufferToArray(aSource.GetAsArrayBuffer(), aArray);
  37   }
  38   if (aSource.IsArrayBufferView()) {
  39     return CopyArrayBufferViewToArray(aSource.GetAsArrayBufferView(), aArray);
  40   }
  41   MOZ_CRASH("Uninitialized union: expected buffer or view");
  42 }
  43
  44 /* static */
  45 void PushUtil::CopyArrayToArrayBuffer(JSContext* aCx,
  46                                       const nsTArray<uint8_t>& aArray,
  47                                       JS::MutableHandle<JSObject*> aValue,
  48                                       ErrorResult& aRv) {
  49   if (aArray.IsEmpty()) {
  50     aValue.set(nullptr);
  51     return;
  52   }
  53   JS::Rooted<JSObject*> buffer(
  54       aCx, ArrayBuffer::Create(aCx, aArray.Length(), aArray.Elements()));
  55   if (NS_WARN_IF(!buffer)) {
  56     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
  57     return;
  58   }
  59   aValue.set(buffer);
  60 }
  61
  62 }  // namespace dom
  63 }  // namespace mozilla