?? qvariant_p.h
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/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef QVARIANT_P_H#define QVARIANT_P_H//// W A R N I N G// -------------//// This file is not part of the Qt API. It exists purely as an// implementation detail. This header file may change from version to// version without notice, or even be removed.//// We mean it.//// takes a type, returns the internal void* pointer casted// to a pointer of the input type#ifdef Q_CC_SUN // Sun CC picks the wrong overload, so introduce awful hacktemplate <typename T>inline T *v_cast(const QVariant::Private *nd, T * = 0){ QVariant::Private *d = const_cast<QVariant::Private *>(nd); return ((sizeof(T) > sizeof(QVariant::Private::Data)) ? static_cast<T *>(d->data.shared->ptr) : static_cast<T *>(static_cast<void *>(&d->data.c)));}#else // every other compiler in this worldtemplate <typename T>inline const T *v_cast(const QVariant::Private *d, T * = 0){ return ((sizeof(T) > sizeof(QVariant::Private::Data)) ? static_cast<const T *>(d->data.shared->ptr) : static_cast<const T *>(static_cast<const void *>(&d->data.c)));}template <typename T>inline T *v_cast(QVariant::Private *d, T * = 0){ return ((sizeof(T) > sizeof(QVariant::Private::Data)) ? static_cast<T *>(d->data.shared->ptr) : static_cast<T *>(static_cast<void *>(&d->data.c)));}#endif// constructs a new variant if copy is 0, otherwise copy-constructstemplate <class T>inline void v_construct(QVariant::Private *x, const void *copy, T * = 0){ if (sizeof(T) > sizeof(QVariant::Private::Data)) { x->data.shared = copy ? new QVariant::PrivateShared(new T(*static_cast<const T *>(copy))) : new QVariant::PrivateShared(new T); x->is_shared = true; } else { if (copy) new (&x->data.ptr) T(*static_cast<const T *>(copy)); else new (&x->data.ptr) T; }}// deletes the internal structurestemplate <class T>inline void v_clear(QVariant::Private *d, T* = 0){ if (sizeof(T) > sizeof(QVariant::Private::Data)) { delete v_cast<T>(d); delete d->data.shared; } else { v_cast<T>(d)->~T(); }}#endif // QVARIANT_P_H
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