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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 16:49:04 +0000 |
commit | 16f504a9dca3fe3b70568f67b7d41241ae485288 (patch) | |
tree | c60f36ada0496ba928b7161059ba5ab1ab224f9d /src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp | |
parent | Initial commit. (diff) | |
download | virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.tar.xz virtualbox-16f504a9dca3fe3b70568f67b7d41241ae485288.zip |
Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp')
-rw-r--r-- | src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp b/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp new file mode 100644 index 00000000..38d7d728 --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/ds/nsSupportsArrayEnumerator.cpp @@ -0,0 +1,148 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* ***** 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 mozilla.org code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of 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 "nsSupportsArrayEnumerator.h" +#include "nsISupportsArray.h" + +nsSupportsArrayEnumerator::nsSupportsArrayEnumerator(nsISupportsArray* array) + : mArray(array), mCursor(0) +{ + NS_ASSERTION(array, "null array"); + NS_ADDREF(mArray); +} + +nsSupportsArrayEnumerator::~nsSupportsArrayEnumerator() +{ + NS_RELEASE(mArray); +} + +NS_IMPL_ISUPPORTS2(nsSupportsArrayEnumerator, nsIBidirectionalEnumerator, nsIEnumerator) + +NS_IMETHODIMP +nsSupportsArrayEnumerator::First() +{ + mCursor = 0; + PRUint32 cnt; + nsresult rv = mArray->Count(&cnt); + if (NS_FAILED(rv)) return rv; + PRInt32 end = (PRInt32)cnt; + if (mCursor < end) + return NS_OK; + else + return NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +nsSupportsArrayEnumerator::Next() +{ + PRUint32 cnt; + nsresult rv = mArray->Count(&cnt); + if (NS_FAILED(rv)) return rv; + PRInt32 end = (PRInt32)cnt; + if (mCursor < end) // don't count upward forever + mCursor++; + if (mCursor < end) + return NS_OK; + else + return NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +nsSupportsArrayEnumerator::CurrentItem(nsISupports **aItem) +{ + NS_ASSERTION(aItem, "null out parameter"); + PRUint32 cnt; + nsresult rv = mArray->Count(&cnt); + if (NS_FAILED(rv)) return rv; + if (mCursor >= 0 && mCursor < (PRInt32)cnt) { + *aItem = mArray->ElementAt(mCursor); + return NS_OK; + } + return NS_ERROR_FAILURE; +} + +NS_IMETHODIMP +nsSupportsArrayEnumerator::IsDone() +{ + PRUint32 cnt; + nsresult rv = mArray->Count(&cnt); + if (NS_FAILED(rv)) return rv; + return (mCursor >= 0 && mCursor < (PRInt32)cnt) + ? NS_ENUMERATOR_FALSE : NS_OK; +} + +//////////////////////////////////////////////////////////////////////////////// + +NS_IMETHODIMP +nsSupportsArrayEnumerator::Last() +{ + PRUint32 cnt; + nsresult rv = mArray->Count(&cnt); + if (NS_FAILED(rv)) return rv; + mCursor = cnt - 1; + return NS_OK; +} + +NS_IMETHODIMP +nsSupportsArrayEnumerator::Prev() +{ + if (mCursor >= 0) + --mCursor; + if (mCursor >= 0) + return NS_OK; + else + return NS_ERROR_FAILURE; +} + +//////////////////////////////////////////////////////////////////////////////// + +NS_COM nsresult +NS_NewISupportsArrayEnumerator(nsISupportsArray* array, + nsIBidirectionalEnumerator* *aInstancePtrResult) +{ + if (aInstancePtrResult == 0) + return NS_ERROR_NULL_POINTER; + nsSupportsArrayEnumerator* e = new nsSupportsArrayEnumerator(array); + if (e == 0) + return NS_ERROR_OUT_OF_MEMORY; + NS_ADDREF(e); + *aInstancePtrResult = e; + return NS_OK; +} + +//////////////////////////////////////////////////////////////////////////////// + |