Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 96 insertions, 0 deletions

diff --git a/dom/quota/MemoryOutputStream.cpp b/dom/quota/MemoryOutputStream.cpp
new file mode 100644
index 0000000000..ce72c236cc
--- /dev/null
+++ b/dom/quota/MemoryOutputStream.cpp
@@ -0,0 +1,96 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "MemoryOutputStream.h"
+
+#include "ErrorList.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/MacroForEach.h"
+#include "mozilla/RefPtr.h"
+#include "mozilla/fallible.h"
+#include "nsDebug.h"
+#include "nsError.h"
+#include "nsStreamUtils.h"
+#include "nscore.h"
+
+class nsIInputStream;
+
+namespace mozilla::dom::quota {
+
+// static
+already_AddRefed<MemoryOutputStream> MemoryOutputStream::Create(
+    uint64_t aSize) {
+  MOZ_ASSERT(aSize, "Passed zero size!");
+
+  if (NS_WARN_IF(aSize > UINT32_MAX)) {
+    return nullptr;
+  }
+
+  RefPtr<MemoryOutputStream> stream = new MemoryOutputStream();
+
+  if (NS_WARN_IF(!stream->mData.SetLength(aSize, fallible))) {
+    return nullptr;
+  }
+
+  return stream.forget();
+}
+
+NS_IMPL_ISUPPORTS(MemoryOutputStream, nsIOutputStream)
+
+NS_IMETHODIMP
+MemoryOutputStream::Close() {
+  mData.Truncate(mOffset);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MemoryOutputStream::Write(const char* aBuf, uint32_t aCount,
+                          uint32_t* _retval) {
+  return WriteSegments(NS_CopySegmentToBuffer, (char*)aBuf, aCount, _retval);
+}
+
+NS_IMETHODIMP
+MemoryOutputStream::Flush() { return NS_OK; }
+
+NS_IMETHODIMP
+MemoryOutputStream::WriteFrom(nsIInputStream* aFromStream, uint32_t aCount,
+                              uint32_t* _retval) {
+  return NS_ERROR_NOT_IMPLEMENTED;
+}
+
+NS_IMETHODIMP
+MemoryOutputStream::WriteSegments(nsReadSegmentFun aReader, void* aClosure,
+                                  uint32_t aCount, uint32_t* _retval) {
+  MOZ_ASSERT(mData.Length() >= mOffset, "Bad stream state!");
+
+  uint32_t maxCount = mData.Length() - mOffset;
+  if (maxCount == 0) {
+    *_retval = 0;
+    return NS_OK;
+  }
+
+  if (aCount > maxCount) {
+    aCount = maxCount;
+  }
+
+  nsresult rv = aReader(this, aClosure, mData.BeginWriting() + mOffset, 0,
+                        aCount, _retval);
+  if (NS_SUCCEEDED(rv)) {
+    MOZ_ASSERT(*_retval <= aCount,
+               "Reader should not read more than we asked it to read!");
+    mOffset += *_retval;
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+MemoryOutputStream::IsNonBlocking(bool* _retval) {
+  *_retval = false;
+  return NS_OK;
+}
+
+}  // namespace mozilla::dom::quota