From bce08ba2206668ad5c962903e29777bb7afa2de3 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Jo=C3=A3o=20Abecasis?= Date: Thu, 1 Dec 2011 15:17:10 +0100 Subject: Introducing QArrayData Modeled on QByteArrayData/QStringData/QVectorData, the intent is to unify book-keeping structs for array-like data and enable sharing of code among them. As in those structures, size (and alloc) data member(s) specify the number of *typed* elements the array does (and can) hold. The size or alignment requirements of those objects is not tracked in this data structure and needs to be maintained by its users. Contrary to QByteArrayData and QStringData, QArrayData's offset member keeps a *byte* offset to the actual data array and is computed from the beginning of the struct. Shared-null and -empty functionality is provided by QArrayData and shared among all users. Planned features include setSharable (force deep copies), fromRawData (detached header and data allocations) and literals a la QStringLiteral (static immutable instances), thus covering the functionality needed for QByteArray, QString and QVector. Change-Id: I9aa709dbb675442e6d06965efb8138ab84602bbd Reviewed-by: Bradley T. Hughes Reviewed-by: Olivier Goffart --- src/corelib/tools/qarraydata.cpp | 49 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 src/corelib/tools/qarraydata.cpp (limited to 'src/corelib/tools/qarraydata.cpp') diff --git a/src/corelib/tools/qarraydata.cpp b/src/corelib/tools/qarraydata.cpp new file mode 100644 index 00000000000..3b15c0e2469 --- /dev/null +++ b/src/corelib/tools/qarraydata.cpp @@ -0,0 +1,49 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. Please review the following information to ensure the GNU General +** Public License version 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include + +QT_BEGIN_NAMESPACE + +const QArrayData QArrayData::shared_null = { Q_REFCOUNT_INITIALIZER(-1), 0, 0, 0, 0 }; +const QArrayData QArrayData::shared_empty = { Q_REFCOUNT_INITIALIZER(-1), 0, 0, 0, 0 }; + +QT_END_NAMESPACE -- cgit v1.2.3