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-rw-r--r--xpcom/ds/nsSupportsArray.cpp264
1 files changed, 264 insertions, 0 deletions
diff --git a/xpcom/ds/nsSupportsArray.cpp b/xpcom/ds/nsSupportsArray.cpp
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--- /dev/null
+++ b/xpcom/ds/nsSupportsArray.cpp
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+/* -*- 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 <stdint.h>
+#include <string.h>
+
+#include "nsArrayEnumerator.h"
+#include "nsIObjectInputStream.h"
+#include "nsIObjectOutputStream.h"
+#include "nsSupportsArray.h"
+#include "nsSupportsArrayEnumerator.h"
+
+// Disable deprecation warnings generated by nsISupportsArray and associated
+// classes.
+#if defined(__GNUC__)
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
+#elif defined(_MSC_VER)
+#pragma warning (push)
+#pragma warning (disable : 4996)
+#endif
+
+nsresult
+nsQueryElementAt::operator()(const nsIID& aIID, void** aResult) const
+{
+ nsresult status =
+ mCollection ? mCollection->QueryElementAt(mIndex, aIID, aResult) :
+ NS_ERROR_NULL_POINTER;
+
+ if (mErrorPtr) {
+ *mErrorPtr = status;
+ }
+
+ return status;
+}
+
+nsSupportsArray::nsSupportsArray()
+{
+}
+
+nsSupportsArray::~nsSupportsArray()
+{
+ Clear();
+}
+
+nsresult
+nsSupportsArray::Create(nsISupports* aOuter, REFNSIID aIID, void** aResult)
+{
+ if (aOuter) {
+ return NS_ERROR_NO_AGGREGATION;
+ }
+
+ nsCOMPtr<nsISupportsArray> it = new nsSupportsArray();
+
+ return it->QueryInterface(aIID, aResult);
+}
+
+NS_IMPL_ISUPPORTS(nsSupportsArray, nsIArray, nsISupportsArray, nsICollection,
+ nsISerializable)
+
+NS_IMETHODIMP
+nsSupportsArray::Read(nsIObjectInputStream* aStream)
+{
+ nsresult rv;
+
+ uint32_t newArraySize;
+ rv = aStream->Read32(&newArraySize);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ uint32_t count;
+ rv = aStream->Read32(&count);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ NS_ASSERTION(count <= newArraySize, "overlarge mCount!");
+ if (count > newArraySize) {
+ count = newArraySize;
+ }
+
+ // Don't clear out our array until we know we have enough space for the new
+ // one and have successfully copied everything out of the stream.
+ nsCOMArray<nsISupports> tmp;
+ tmp.SetCapacity(newArraySize);
+ tmp.SetCount(count);
+
+ auto elems = tmp.Elements();
+ for (uint32_t i = 0; i < count; i++) {
+ rv = aStream->ReadObject(true, &elems[i]);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ // Now clear out existing refs and replace with the new array.
+ mArray.Clear();
+ mArray.SwapElements(tmp);
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::Write(nsIObjectOutputStream* aStream)
+{
+ nsresult rv;
+
+ rv = aStream->Write32(mArray.Capacity());
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ rv = aStream->Write32(mArray.Length());
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ for (size_t i = 0; i < mArray.Length(); i++) {
+ rv = aStream->WriteObject(mArray[i], true);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+ }
+
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::GetElementAt(uint32_t aIndex, nsISupports** aOutPtr)
+{
+ nsCOMPtr<nsISupports> elm = mArray.SafeElementAt(aIndex);
+ elm.forget(aOutPtr);
+ return NS_OK;
+}
+
+NS_IMETHODIMP_(int32_t)
+nsSupportsArray::IndexOf(const nsISupports* aPossibleElement)
+{
+ // nsCOMArray takes a non-const param, but it just passes through to
+ // nsTArray which takes a const param.
+ return mArray.IndexOf(const_cast<nsISupports*>(aPossibleElement));
+}
+
+NS_IMETHODIMP_(bool)
+nsSupportsArray::InsertElementAt(nsISupports* aElement, uint32_t aIndex)
+{
+ return mArray.InsertObjectAt(aElement, aIndex);
+}
+
+NS_IMETHODIMP_(bool)
+nsSupportsArray::ReplaceElementAt(nsISupports* aElement, uint32_t aIndex)
+{
+ // nsCOMArray::ReplaceObjectAt will grow the array if necessary. Instead
+ // we do the bounds check and only replace if it's in range.
+ if (aIndex < mArray.Length()) {
+ mArray.ReplaceElementAt(aIndex, aElement);
+ return true;
+ }
+ return false;
+}
+
+NS_IMETHODIMP_(bool)
+nsSupportsArray::RemoveElementAt(uint32_t aIndex)
+{
+ return mArray.RemoveObjectAt(aIndex);
+}
+
+NS_IMETHODIMP
+nsSupportsArray::RemoveElement(nsISupports* aElement)
+{
+ return mArray.RemoveObject(aElement) ? NS_OK : NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::Clear(void)
+{
+ mArray.Clear();
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::DeprecatedEnumerate(nsIEnumerator** aResult)
+{
+ RefPtr<nsSupportsArrayEnumerator> e = new nsSupportsArrayEnumerator(this);
+ e.forget(aResult);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::Clone(nsISupportsArray** aResult)
+{
+ nsCOMPtr<nsISupportsArray> newArray;
+ nsresult rv = NS_NewISupportsArray(getter_AddRefs(newArray));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return rv;
+ }
+
+ for (size_t i = 0; i < mArray.Length(); i++) {
+ // AppendElement does an odd cast of bool to nsresult, we just cast back
+ // here.
+ if (!(bool)newArray->AppendElement(mArray[i])) {
+ return NS_ERROR_OUT_OF_MEMORY;
+ }
+ }
+
+ newArray.forget(aResult);
+ return NS_OK;
+}
+
+nsresult
+NS_NewISupportsArray(nsISupportsArray** aInstancePtrResult)
+{
+ nsresult rv;
+ rv = nsSupportsArray::Create(nullptr, NS_GET_IID(nsISupportsArray),
+ (void**)aInstancePtrResult);
+ return rv;
+}
+
+/**
+ * nsIArray adapters.
+ */
+NS_IMETHODIMP
+nsSupportsArray::GetLength(uint32_t* aLength) {
+ return Count(aLength);
+}
+
+NS_IMETHODIMP
+nsSupportsArray::QueryElementAt(uint32_t aIndex, const nsIID& aIID, void** aResult)
+{
+ nsISupports* element = mArray.SafeElementAt(aIndex);
+ if (element) {
+ return element->QueryInterface(aIID, aResult);
+ }
+ return NS_ERROR_FAILURE;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::IndexOf(uint32_t aStartIndex, nsISupports* aElement, uint32_t* aResult)
+{
+ int32_t idx = mArray.IndexOf(aElement, aStartIndex);
+ if (idx < 0) {
+ return NS_ERROR_FAILURE;
+ }
+
+ *aResult = static_cast<uint32_t>(idx);
+ return NS_OK;
+}
+
+NS_IMETHODIMP
+nsSupportsArray::Enumerate(nsISimpleEnumerator** aResult)
+{
+ return NS_NewArrayEnumerator(aResult, this);
+}
+
+#if defined(__GNUC__)
+#pragma GCC diagnostic pop
+#elif defined(_MSC_VER)
+#pragma warning (pop)
+#endif
+