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Diffstat (limited to 'src/corelib/tools/qarraydataops.h')
| -rw-r--r-- | src/corelib/tools/qarraydataops.h | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/src/corelib/tools/qarraydataops.h b/src/corelib/tools/qarraydataops.h new file mode 100644 index 0000000000..d62c411511 --- /dev/null +++ b/src/corelib/tools/qarraydataops.h @@ -0,0 +1,182 @@ +/**************************************************************************** +** +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QARRAYDATAOPS_H +#define QARRAYDATAOPS_H + +#include <QtCore/qarraydata.h> + +#include <new> +#include <string.h> + +QT_BEGIN_HEADER + +QT_BEGIN_NAMESPACE + +QT_MODULE(Core) + +namespace QtPrivate { + +template <class T> +struct QPodArrayOps + : QTypedArrayData<T> +{ + void copyAppend(const T *b, const T *e) + { + Q_ASSERT(this->ref == 1); + Q_ASSERT(b < e); + Q_ASSERT(size_t(e - b) <= this->alloc - uint(this->size)); + + ::memcpy(this->end(), b, (e - b) * sizeof(T)); + this->size += e - b; + } + + void copyAppend(size_t n, const T &t) + { + Q_ASSERT(this->ref == 1); + Q_ASSERT(n <= this->alloc - uint(this->size)); + + T *iter = this->end(); + const T *const end = iter + n; + for (; iter != end; ++iter) + ::memcpy(iter, &t, sizeof(T)); + this->size += n; + } + + void destroyAll() // Call from destructors, ONLY! + { + Q_ASSERT(this->ref == 0); + + // As this is to be called only from destructor, it doesn't need to be + // exception safe; size not updated. + } +}; + +template <class T> +struct QGenericArrayOps + : QTypedArrayData<T> +{ + void copyAppend(const T *b, const T *e) + { + Q_ASSERT(this->ref == 1); + Q_ASSERT(b < e); + Q_ASSERT(size_t(e - b) <= this->alloc - uint(this->size)); + + T *iter = this->end(); + for (; b != e; ++iter, ++b) { + new (iter) T(*b); + ++this->size; + } + } + + void copyAppend(size_t n, const T &t) + { + Q_ASSERT(this->ref == 1); + Q_ASSERT(n <= this->alloc - uint(this->size)); + + T *iter = this->end(); + const T *const end = iter + n; + for (; iter != end; ++iter) { + new (iter) T(t); + ++this->size; + } + } + + void destroyAll() // Call from destructors, ONLY + { + // As this is to be called only from destructor, it doesn't need to be + // exception safe; size not updated. + + Q_ASSERT(this->ref == 0); + + const T *const b = this->begin(); + const T *i = this->end(); + + while (i != b) + (--i)->~T(); + } +}; + +template <class T> +struct QMovableArrayOps + : QGenericArrayOps<T> +{ + // using QGenericArrayOps<T>::copyAppend; + // using QGenericArrayOps<T>::destroyAll; +}; + +template <class T, class = void> +struct QArrayOpsSelector +{ + typedef QGenericArrayOps<T> Type; +}; + +template <class T> +struct QArrayOpsSelector<T, + typename QEnableIf< + !QTypeInfo<T>::isComplex && !QTypeInfo<T>::isStatic + >::Type> +{ + typedef QPodArrayOps<T> Type; +}; + +template <class T> +struct QArrayOpsSelector<T, + typename QEnableIf< + QTypeInfo<T>::isComplex && !QTypeInfo<T>::isStatic + >::Type> +{ + typedef QMovableArrayOps<T> Type; +}; + +} // namespace QtPrivate + +template <class T> +struct QArrayDataOps + : QtPrivate::QArrayOpsSelector<T>::Type +{ +}; + +QT_END_NAMESPACE + +QT_END_HEADER + +#endif // include guard |