mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-26 02:02:33 +00:00
242 lines
7.2 KiB
C++
242 lines
7.2 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is XPCOM Array implementation.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corp.
|
|
* Portions created by the Initial Developer are Copyright (C) 2002
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Alec Flett <alecf@netscape.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "nsArray.h"
|
|
#include "nsArrayEnumerator.h"
|
|
#include "nsWeakReference.h"
|
|
#include "nsThreadUtils.h"
|
|
|
|
// used by IndexOf()
|
|
struct findIndexOfClosure
|
|
{
|
|
nsISupports *targetElement;
|
|
PRUint32 startIndex;
|
|
PRUint32 resultIndex;
|
|
};
|
|
|
|
static PRBool FindElementCallback(void* aElement, void* aClosure);
|
|
|
|
NS_INTERFACE_MAP_BEGIN(nsArray)
|
|
NS_INTERFACE_MAP_ENTRY(nsIArray)
|
|
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(nsIMutableArray)
|
|
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIMutableArray)
|
|
NS_INTERFACE_MAP_END
|
|
|
|
nsArray::~nsArray()
|
|
{
|
|
Clear();
|
|
}
|
|
|
|
|
|
NS_IMPL_ADDREF(nsArray)
|
|
NS_IMPL_RELEASE(nsArray)
|
|
|
|
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsArrayCC)
|
|
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsArrayCC)
|
|
|
|
NS_IMPL_CYCLE_COLLECTION_CLASS(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_NSCOMARRAY(mArray)
|
|
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::GetLength(PRUint32* aLength)
|
|
{
|
|
*aLength = mArray.Count();
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::QueryElementAt(PRUint32 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
|
|
nsArray::IndexOf(PRUint32 aStartIndex, nsISupports* aElement,
|
|
PRUint32* aResult)
|
|
{
|
|
// optimize for the common case by forwarding to mArray
|
|
if (aStartIndex == 0) {
|
|
PRUint32 idx = mArray.IndexOf(aElement);
|
|
if (idx == PR_UINT32_MAX)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
*aResult = idx;
|
|
return NS_OK;
|
|
}
|
|
|
|
findIndexOfClosure closure = { aElement, aStartIndex, 0 };
|
|
PRBool notFound = mArray.EnumerateForwards(FindElementCallback, &closure);
|
|
if (notFound)
|
|
return NS_ERROR_FAILURE;
|
|
|
|
*aResult = closure.resultIndex;
|
|
return NS_OK;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::Enumerate(nsISimpleEnumerator **aResult)
|
|
{
|
|
return NS_NewArrayEnumerator(aResult, static_cast<nsIArray*>(this));
|
|
}
|
|
|
|
// nsIMutableArray implementation
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::AppendElement(nsISupports* aElement, PRBool aWeak)
|
|
{
|
|
PRBool result;
|
|
if (aWeak) {
|
|
nsCOMPtr<nsISupports> elementRef =
|
|
getter_AddRefs(static_cast<nsISupports*>
|
|
(NS_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
|
|
nsArray::RemoveElementAt(PRUint32 aIndex)
|
|
{
|
|
PRBool result = mArray.RemoveObjectAt(aIndex);
|
|
return result ? NS_OK : NS_ERROR_FAILURE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::InsertElementAt(nsISupports* aElement, PRUint32 aIndex, PRBool aWeak)
|
|
{
|
|
nsCOMPtr<nsISupports> elementRef;
|
|
if (aWeak) {
|
|
elementRef =
|
|
getter_AddRefs(static_cast<nsISupports*>
|
|
(NS_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;
|
|
}
|
|
PRBool result = mArray.InsertObjectAt(elementRef, aIndex);
|
|
return result ? NS_OK : NS_ERROR_FAILURE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::ReplaceElementAt(nsISupports* aElement, PRUint32 aIndex, PRBool aWeak)
|
|
{
|
|
nsCOMPtr<nsISupports> elementRef;
|
|
if (aWeak) {
|
|
elementRef =
|
|
getter_AddRefs(static_cast<nsISupports*>
|
|
(NS_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;
|
|
}
|
|
PRBool result = mArray.ReplaceObjectAt(elementRef, aIndex);
|
|
return result ? NS_OK : NS_ERROR_FAILURE;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsArray::Clear()
|
|
{
|
|
mArray.Clear();
|
|
return NS_OK;
|
|
}
|
|
|
|
//
|
|
// static helper routines
|
|
//
|
|
PRBool
|
|
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 PR_FALSE; // stop! We found it
|
|
}
|
|
closure->resultIndex++;
|
|
|
|
return PR_TRUE;
|
|
}
|
|
|
|
nsresult
|
|
nsArrayConstructor(nsISupports *aOuter, const nsIID& aIID, void **aResult)
|
|
{
|
|
if (aOuter)
|
|
return NS_ERROR_NO_AGGREGATION;
|
|
|
|
nsCOMPtr<nsIArray> inst = NS_IsMainThread() ? new nsArrayCC : new nsArray;
|
|
if (!inst)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
return inst->QueryInterface(aIID, aResult);
|
|
}
|