C++ InfallibleTArray::Elements方法代码示例

bool
UDPSocketParent::RecvDataWithAddress(const InfallibleTArray<uint8_t>& aData,
                                     const mozilla::net::NetAddr& aAddr)
{
  NS_ENSURE_TRUE(mSocket, true);
  NS_ASSERTION(mFilter, "No packet filter");

  uint32_t count;
  nsresult rv;
  bool allowed;
  rv = mFilter->FilterPacket(&aAddr, aData.Elements(),
                             aData.Length(), nsIUDPSocketFilter::SF_OUTGOING,
                             &allowed);
  // Sending unallowed data, kill content.
  NS_ENSURE_SUCCESS(rv, false);
  NS_ENSURE_TRUE(allowed, false);

  rv = mSocket->SendWithAddress(&aAddr, aData.Elements(),
                                aData.Length(), &count);
  mozilla::unused <<
      PUDPSocketParent::SendCallback(NS_LITERAL_CSTRING("onsent"),
                                     UDPSendResult(rv),
                                     NS_LITERAL_CSTRING("connected"));
  NS_ENSURE_SUCCESS(rv, true);
  NS_ENSURE_TRUE(count > 0, true);
  return true;
}

void
UDPSocketParent::Send(const InfallibleTArray<uint8_t>& aData,
                      const UDPSocketAddr& aAddr)
{
  nsresult rv;
  uint32_t count;
  switch(aAddr.type()) {
    case UDPSocketAddr::TUDPAddressInfo: {
      const UDPAddressInfo& addrInfo(aAddr.get_UDPAddressInfo());
      rv = mSocket->Send(addrInfo.addr(), addrInfo.port(),
                         aData.Elements(), aData.Length(), &count);
      break;
    }
    case UDPSocketAddr::TNetAddr: {
      const NetAddr& addr(aAddr.get_NetAddr());
      rv = mSocket->SendWithAddress(&addr, aData.Elements(),
                                    aData.Length(), &count);
      break;
    }
    default:
      MOZ_ASSERT(false, "Invalid address type!");
      return;
  }

  if (NS_WARN_IF(NS_FAILED(rv)) || count == 0) {
    FireInternalError(__LINE__);
  }
}

bool
GMPStorageParent::RecvWrite(const nsCString& aRecordName,
                            const InfallibleTArray<uint8_t>& aBytes)
{
  LOGD(("%s::%s: %p record=%s", __CLASS__, __FUNCTION__, this, aRecordName.get()));

  if (mShutdown) {
    return true;
  }
  if (aBytes.Length() > GMP_MAX_RECORD_SIZE) {
    unused << SendWriteComplete(aRecordName, GMPQuotaExceededErr);
    return true;
  }

  PRFileDesc* fd = mFiles.Get(aRecordName);
  if (!fd) {
    unused << SendWriteComplete(aRecordName, GMPGenericErr);
    return true;
  }

  // Write operations overwrite the entire record. So re-open the file
  // in truncate mode, to clear its contents.
  PR_Close(fd);
  mFiles.Remove(aRecordName);
  if (NS_FAILED(OpenStorageFile(aRecordName, mOrigin, Truncate, &fd))) {
    unused << SendWriteComplete(aRecordName, GMPGenericErr);
    return true;
  }
  mFiles.Put(aRecordName, fd);

  int32_t bytesWritten = PR_Write(fd, aBytes.Elements(), aBytes.Length());
  auto res = (bytesWritten == (int32_t)aBytes.Length()) ? GMPNoErr : GMPGenericErr;
  unused << SendWriteComplete(aRecordName, res);
  return true;
}

nsresult
nsLookAndFeel::CallRemoteGetSystemColors()
{
    // An array has to be used to get data from remote process
    InfallibleTArray<PRUint32> colors;
    PRUint32 colorsCount = sizeof(AndroidSystemColors) / sizeof(nscolor);

    if (!ContentChild::GetSingleton()->SendGetSystemColors(colorsCount, &colors))
        return NS_ERROR_FAILURE;

    NS_ASSERTION(colors.Length() == colorsCount, "System colors array is incomplete");
    if (colors.Length() == 0)
        return NS_ERROR_FAILURE;

    if (colors.Length() < colorsCount)
        colorsCount = colors.Length();

    // Array elements correspond to the members of mSystemColors structure,
    // so just copy the memory block
    memcpy(&mSystemColors, colors.Elements(), sizeof(nscolor) * colorsCount);

    mInitializedSystemColors = PR_TRUE;

    return NS_OK;
}

bool
UDPSocketChild::RecvCallbackReceivedData(const UDPAddressInfo& aAddressInfo,
                                         const InfallibleTArray<uint8_t>& aData)
{
  nsresult rv = mSocket->CallListenerReceivedData(aAddressInfo.addr(), aAddressInfo.port(),
                                                  aData.Elements(), aData.Length());
  mozilla::unused << NS_WARN_IF(NS_FAILED(rv));

  return true;
}

bool
GMPStorageChild::RecvReadComplete(const nsCString& aRecordName,
                                  const GMPErr& aStatus,
                                  const InfallibleTArray<uint8_t>& aBytes)
{
  if (mShutdown) {
    return true;
  }
  nsRefPtr<GMPRecordImpl> record = GetRecord(aRecordName);
  if (!record) {
    // Not fatal.
    return true;
  }
  record->ReadComplete(aStatus, aBytes.Elements(), aBytes.Length());
  return true;
}

bool
DeserializeArrayBuffer(JS::Handle<JSObject*> aObj,
                       const InfallibleTArray<uint8_t>& aBuffer,
                       JS::MutableHandle<JS::Value> aVal)
{
  mozilla::AutoSafeJSContext cx;
  JSAutoCompartment ac(cx, aObj);

  JS::Rooted<JSObject*> obj(cx, JS_NewArrayBuffer(cx, aBuffer.Length()));
  if (!obj)
    return false;
  uint8_t* data = JS_GetArrayBufferData(obj);
  if (!data)
    return false;
  memcpy(data, aBuffer.Elements(), aBuffer.Length());
  aVal.set(OBJECT_TO_JSVAL(obj));
  return true;
}

bool
DeserializeArrayBuffer(JSContext* cx,
                       const InfallibleTArray<uint8_t>& aBuffer,
                       JS::MutableHandle<JS::Value> aVal)
{
  mozilla::UniquePtr<uint8_t[], JS::FreePolicy> data(js_pod_malloc<uint8_t>(aBuffer.Length()));
  if (!data)
      return false;
  memcpy(data.get(), aBuffer.Elements(), aBuffer.Length());

  JSObject* obj = JS_NewArrayBufferWithContents(cx, aBuffer.Length(), data.get());
  if (!obj)
      return false;
  // If JS_NewArrayBufferWithContents returns non-null, the ownership of
  // the data is transfered to obj, so we release the ownership here.
  mozilla::Unused << data.release();

  aVal.setObject(*obj);
  return true;
}

static nsresult
CallRemoteGetIconForExtension(const nsACString& aFileExt, uint32_t aIconSize, uint8_t * const aBuf)
{
  NS_ENSURE_TRUE(aBuf != nullptr, NS_ERROR_NULL_POINTER);

  // An array has to be used to get data from remote process
  InfallibleTArray<uint8_t> bits;
  uint32_t bufSize = aIconSize * aIconSize * 4;

  if (!ContentChild::GetSingleton()->SendGetIconForExtension(PromiseFlatCString(aFileExt), aIconSize, &bits))
    return NS_ERROR_FAILURE;

  NS_ASSERTION(bits.Length() == bufSize, "Pixels array is incomplete");
  if (bits.Length() != bufSize)
    return NS_ERROR_FAILURE;

  memcpy(aBuf, bits.Elements(), bufSize);

  return NS_OK;
}

bool
GMPStorageChild::RecvReadComplete(const nsCString& aRecordName,
                                  const GMPErr& aStatus,
                                  const InfallibleTArray<uint8_t>& aBytes)
{
  if (mShutdown) {
    return true;
  }
  nsRefPtr<GMPRecordImpl> record;
  if (!mRecords.Get(aRecordName, getter_AddRefs(record)) || !record) {
    // Not fatal.
    return true;
  }
  record->ReadComplete(aStatus,
                       aBytes.Elements(),
                       aBytes.Length());
  if (GMP_FAILED(aStatus)) {
    Close(record);
  }
  return true;
}

void
TCPSocketParent::FireArrayBufferDataEvent(nsTArray<uint8_t>& aBuffer, TCPReadyState aReadyState)
{
  InfallibleTArray<uint8_t> arr;
  arr.SwapElements(aBuffer);

  if (mFilter) {
    bool allowed;
    mozilla::net::NetAddr addr;
    nsresult nsrv = mFilter->FilterPacket(&addr, arr.Elements(), arr.Length(),
                                          nsISocketFilter::SF_INCOMING,
                                          &allowed);
    // receiving unallowed data, drop it.
    if (NS_WARN_IF(NS_FAILED(nsrv)) || !allowed) {
      TCPSOCKET_LOG(("%s: Dropping incoming TCP packet", __FUNCTION__));
      return;
    }
  }

  SendableData data(arr);
  SendEvent(NS_LITERAL_STRING("data"), data, aReadyState);
}