Add m-esr52 at 52.6.0

1 files changed, 242 insertions, 0 deletions

diff --git a/xpcom/ds/nsArray.cpp b/xpcom/ds/nsArray.cpp
new file mode 100644
index 000000000..d137a14a5
--- /dev/null
+++ b/xpcom/ds/nsArray.cpp
@@ -0,0 +1,242 @@
+/* -*- 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 "nsArray.h"
+#include "nsArrayEnumerator.h"
+#include "nsIWeakReference.h"
+#include "nsIWeakReferenceUtils.h"
+#include "nsThreadUtils.h"
+
+// used by IndexOf()
+struct MOZ_STACK_CLASS findIndexOfClosure
+{
+  // This is only used for pointer comparison, so we can just use a void*.
+  void* targetElement;
+  uint32_t startIndex;
+  uint32_t resultIndex;
+};
+
+static bool FindElementCallback(void* aElement, void* aClosure);
+
+NS_INTERFACE_MAP_BEGIN(nsArray)
+  NS_INTERFACE_MAP_ENTRY(nsIArray)
+  NS_INTERFACE_MAP_ENTRY(nsIArrayExtensions)
+  NS_INTERFACE_MAP_ENTRY(nsIMutableArray)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMutableArray)
+NS_INTERFACE_MAP_END
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsArrayCC)
+  NS_INTERFACE_MAP_ENTRY(nsIArray)
+  NS_INTERFACE_MAP_ENTRY(nsIArrayExtensions)
+  NS_INTERFACE_MAP_ENTRY(nsIMutableArray)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMutableArray)
+NS_INTERFACE_MAP_END
+
+nsArrayBase::~nsArrayBase()
+{
+  Clear();
+}
+
+
+NS_IMPL_ADDREF(nsArray)
+NS_IMPL_RELEASE(nsArray)
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsArrayCC)
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(nsArrayCC)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(nsArrayCC)
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsArrayCC)
+  tmp->Clear();
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsArrayCC)
+  NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mArray)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMETHODIMP
+nsArrayBase::GetLength(uint32_t* aLength)
+{
+  *aLength = mArray.Count();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsArrayBase::QueryElementAt(uint32_t aIndex,
+                            const nsIID& aIID,
+                            void** aResult)
+{
+  nsISupports* obj = mArray.SafeObjectAt(aIndex);
+  if (!obj) {
+    return NS_ERROR_ILLEGAL_VALUE;
+  }
+
+  // no need to worry about a leak here, because SafeObjectAt()
+  // doesn't addref its result
+  return obj->QueryInterface(aIID, aResult);
+}
+
+NS_IMETHODIMP
+nsArrayBase::IndexOf(uint32_t aStartIndex, nsISupports* aElement,
+                     uint32_t* aResult)
+{
+  // optimize for the common case by forwarding to mArray
+  if (aStartIndex == 0) {
+    uint32_t idx = mArray.IndexOf(aElement);
+    if (idx == UINT32_MAX) {
+      return NS_ERROR_FAILURE;
+    }
+
+    *aResult = idx;
+    return NS_OK;
+  }
+
+  findIndexOfClosure closure = { aElement, aStartIndex, 0 };
+  bool notFound = mArray.EnumerateForwards(FindElementCallback, &closure);
+  if (notFound) {
+    return NS_ERROR_FAILURE;
+  }
+
+  *aResult = closure.resultIndex;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsArrayBase::Enumerate(nsISimpleEnumerator** aResult)
+{
+  return NS_NewArrayEnumerator(aResult, static_cast<nsIArray*>(this));
+}
+
+// nsIMutableArray implementation
+
+NS_IMETHODIMP
+nsArrayBase::AppendElement(nsISupports* aElement, bool aWeak)
+{
+  bool result;
+  if (aWeak) {
+    nsCOMPtr<nsIWeakReference> elementRef = do_GetWeakReference(aElement);
+    NS_ASSERTION(elementRef,
+                 "AppendElement: Trying to use weak references on an object that doesn't support it");
+    if (!elementRef) {
+      return NS_ERROR_FAILURE;
+    }
+    result = mArray.AppendObject(elementRef);
+  }
+
+  else {
+    // add the object directly
+    result = mArray.AppendObject(aElement);
+  }
+  return result ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsArrayBase::RemoveElementAt(uint32_t aIndex)
+{
+  bool result = mArray.RemoveObjectAt(aIndex);
+  return result ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsArrayBase::InsertElementAt(nsISupports* aElement, uint32_t aIndex, bool aWeak)
+{
+  nsCOMPtr<nsISupports> elementRef;
+  if (aWeak) {
+    elementRef = do_GetWeakReference(aElement);
+    NS_ASSERTION(elementRef,
+                 "InsertElementAt: Trying to use weak references on an object that doesn't support it");
+    if (!elementRef) {
+      return NS_ERROR_FAILURE;
+    }
+  } else {
+    elementRef = aElement;
+  }
+  bool result = mArray.InsertObjectAt(elementRef, aIndex);
+  return result ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsArrayBase::ReplaceElementAt(nsISupports* aElement, uint32_t aIndex, bool aWeak)
+{
+  nsCOMPtr<nsISupports> elementRef;
+  if (aWeak) {
+    elementRef = do_GetWeakReference(aElement);
+    NS_ASSERTION(elementRef,
+                 "ReplaceElementAt: Trying to use weak references on an object that doesn't support it");
+    if (!elementRef) {
+      return NS_ERROR_FAILURE;
+    }
+  } else {
+    elementRef = aElement;
+  }
+  mArray.ReplaceObjectAt(elementRef, aIndex);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsArrayBase::Clear()
+{
+  mArray.Clear();
+  return NS_OK;
+}
+
+// nsIArrayExtensions implementation.
+
+NS_IMETHODIMP
+nsArrayBase::Count(uint32_t* aResult)
+{
+  return GetLength(aResult);
+}
+
+NS_IMETHODIMP
+nsArrayBase::GetElementAt(uint32_t aIndex, nsISupports** aResult)
+{
+  nsCOMPtr<nsISupports> obj = mArray.SafeObjectAt(aIndex);
+  obj.forget(aResult);
+  return NS_OK;
+}
+
+//
+// static helper routines
+//
+bool
+FindElementCallback(void* aElement, void* aClosure)
+{
+  findIndexOfClosure* closure = static_cast<findIndexOfClosure*>(aClosure);
+  nsISupports* element = static_cast<nsISupports*>(aElement);
+
+  // don't start searching until we're past the startIndex
+  if (closure->resultIndex >= closure->startIndex &&
+      element == closure->targetElement) {
+    return false;    // stop! We found it
+  }
+  closure->resultIndex++;
+
+  return true;
+}
+
+nsresult
+nsArrayBase::XPCOMConstructor(nsISupports* aOuter, const nsIID& aIID,
+                              void** aResult)
+{
+  if (aOuter) {
+    return NS_ERROR_NO_AGGREGATION;
+  }
+
+  nsCOMPtr<nsIMutableArray> inst = Create();
+  return inst->QueryInterface(aIID, aResult);
+}
+
+already_AddRefed<nsIMutableArray>
+nsArrayBase::Create()
+{
+  nsCOMPtr<nsIMutableArray> inst;
+  if (NS_IsMainThread()) {
+    inst = new nsArrayCC;
+  } else {
+    inst = new nsArray;
+  }
+  return inst.forget();
+}