dom/quota/EncryptingOutputStream.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 file,
   5  * You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "EncryptingOutputStream.h"
   8 #include "EncryptingOutputStream_impl.h"
   9
  10 #include <type_traits>
  11 #include "mozilla/MacroForEach.h"
  12 #include "nsStreamUtils.h"
  13
  14 namespace mozilla::dom::quota {
  15
  16 NS_IMPL_ISUPPORTS(EncryptingOutputStreamBase, nsIOutputStream);
  17
  18 EncryptingOutputStreamBase::EncryptingOutputStreamBase(
  19     nsCOMPtr<nsIOutputStream> aBaseStream, size_t aBlockSize)
  20     : mBaseStream(WrapNotNull(std::move(aBaseStream))),
  21       mBlockSize(aBlockSize) {}
  22
  23 NS_IMETHODIMP EncryptingOutputStreamBase::Write(const char* aBuf,
  24                                                 uint32_t aCount,
  25                                                 uint32_t* aResultOut) {
  26   return WriteSegments(NS_CopyBufferToSegment, const_cast<char*>(aBuf), aCount,
  27                        aResultOut);
  28 }
  29
  30 NS_IMETHODIMP EncryptingOutputStreamBase::WriteFrom(nsIInputStream*, uint32_t,
  31                                                     uint32_t*) {
  32   return NS_ERROR_NOT_IMPLEMENTED;
  33 }
  34
  35 NS_IMETHODIMP EncryptingOutputStreamBase::IsNonBlocking(bool* aNonBlockingOut) {
  36   *aNonBlockingOut = false;
  37   return NS_OK;
  38 }
  39
  40 nsresult EncryptingOutputStreamBase::WriteAll(const char* aBuf, uint32_t aCount,
  41                                               uint32_t* aBytesWrittenOut) {
  42   *aBytesWrittenOut = 0;
  43
  44   if (!mBaseStream) {
  45     return NS_BASE_STREAM_CLOSED;
  46   }
  47
  48   uint32_t offset = 0;
  49   while (aCount > 0) {
  50     uint32_t numWritten = 0;
  51     nsresult rv = (*mBaseStream)->Write(aBuf + offset, aCount, &numWritten);
  52     if (NS_WARN_IF(NS_FAILED(rv))) {
  53       return rv;
  54     }
  55
  56     offset += numWritten;
  57     aCount -= numWritten;
  58     *aBytesWrittenOut += numWritten;
  59   }
  60
  61   return NS_OK;
  62 }
  63
  64 }  // namespace mozilla::dom::quota