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Diffstat (limited to 'src/corelib/tools/qbytedata_p.h')
| -rw-r--r-- | src/corelib/tools/qbytedata_p.h | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/src/corelib/tools/qbytedata_p.h b/src/corelib/tools/qbytedata_p.h deleted file mode 100644 index 8331be112d..0000000000 --- a/src/corelib/tools/qbytedata_p.h +++ /dev/null @@ -1,245 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the QtCore module of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:LGPL$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** GNU Lesser General Public License Usage -** Alternatively, this file may be used under the terms of the GNU Lesser -** General Public License version 3 as published by the Free Software -** Foundation and appearing in the file LICENSE.LGPL3 included in the -** packaging of this file. Please review the following information to -** ensure the GNU Lesser General Public License version 3 requirements -** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU -** General Public License version 2.0 or (at your option) the GNU General -** Public license version 3 or any later version approved by the KDE Free -** Qt Foundation. The licenses are as published by the Free Software -** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 -** included in the packaging of this file. Please review the following -** information to ensure the GNU General Public License requirements will -** be met: https://www.gnu.org/licenses/gpl-2.0.html and -** https://www.gnu.org/licenses/gpl-3.0.html. -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#ifndef QBYTEDATA_P_H -#define QBYTEDATA_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. -// - -#include <QtCore/private/qglobal_p.h> -#include <qbytearray.h> - -QT_BEGIN_NAMESPACE - -// this class handles a list of QByteArrays. It is a variant of QRingBuffer -// that avoid malloc/realloc/memcpy. -class QByteDataBuffer -{ -private: - QList<QByteArray> buffers; - qint64 bufferCompleteSize; - qint64 firstPos; -public: - QByteDataBuffer() : bufferCompleteSize(0), firstPos(0) - { - } - - ~QByteDataBuffer() - { - clear(); - } - - static inline void popFront(QByteArray &ba, qint64 n) - { - ba = QByteArray(ba.constData() + n, ba.size() - n); - } - - inline void squeezeFirst() - { - if (!buffers.isEmpty() && firstPos > 0) { - popFront(buffers.first(), firstPos); - firstPos = 0; - } - } - - inline void append(const QByteDataBuffer& other) - { - if (other.isEmpty()) - return; - - buffers.append(other.buffers); - bufferCompleteSize += other.byteAmount(); - - if (other.firstPos > 0) - popFront(buffers[bufferCount() - other.bufferCount()], other.firstPos); - } - - - inline void append(const QByteArray& bd) - { - if (bd.isEmpty()) - return; - - buffers.append(bd); - bufferCompleteSize += bd.size(); - } - - inline void prepend(const QByteArray& bd) - { - if (bd.isEmpty()) - return; - - squeezeFirst(); - - buffers.prepend(bd); - bufferCompleteSize += bd.size(); - } - - // return the first QByteData. User of this function has to free() its .data! - // preferably use this function to read data. - inline QByteArray read() - { - squeezeFirst(); - bufferCompleteSize -= buffers.first().size(); - return buffers.takeFirst(); - } - - // return everything. User of this function has to free() its .data! - // avoid to use this, it might malloc and memcpy. - inline QByteArray readAll() - { - return read(byteAmount()); - } - - // return amount. User of this function has to free() its .data! - // avoid to use this, it might malloc and memcpy. - inline QByteArray read(qint64 amount) - { - amount = qMin(byteAmount(), amount); - QByteArray byteData; - byteData.resize(amount); - read(byteData.data(), byteData.size()); - return byteData; - } - - // return amount bytes. User of this function has to free() its .data! - // avoid to use this, it will memcpy. - qint64 read(char* dst, qint64 amount) - { - amount = qMin(amount, byteAmount()); - qint64 originalAmount = amount; - char *writeDst = dst; - - while (amount > 0) { - const QByteArray &first = buffers.first(); - qint64 firstSize = first.size() - firstPos; - if (amount >= firstSize) { - // take it completely - bufferCompleteSize -= firstSize; - amount -= firstSize; - memcpy(writeDst, first.constData() + firstPos, firstSize); - writeDst += firstSize; - firstPos = 0; - buffers.takeFirst(); - } else { - // take a part of it & it is the last one to take - bufferCompleteSize -= amount; - memcpy(writeDst, first.constData() + firstPos, amount); - firstPos += amount; - amount = 0; - } - } - - return originalAmount; - } - - inline char getChar() - { - char c; - read(&c, 1); - return c; - } - - inline void clear() - { - buffers.clear(); - bufferCompleteSize = 0; - firstPos = 0; - } - - // The byte count of all QByteArrays - inline qint64 byteAmount() const - { - return bufferCompleteSize; - } - - // the number of QByteArrays - inline qint64 bufferCount() const - { - return buffers.length(); - } - - inline bool isEmpty() const - { - return byteAmount() == 0; - } - - inline qint64 sizeNextBlock() const - { - if(buffers.isEmpty()) - return 0; - else - return buffers.first().size() - firstPos; - } - - inline QByteArray& operator[](int i) - { - if (i == 0) - squeezeFirst(); - - return buffers[i]; - } - - inline bool canReadLine() const { - int i = 0; - if (i < buffers.length()) { - if (buffers.at(i).indexOf('\n', firstPos) != -1) - return true; - ++i; - - for (; i < buffers.length(); i++) - if (buffers.at(i).contains('\n')) - return true; - } - return false; - } -}; - -QT_END_NAMESPACE - -#endif // QBYTEDATA_P_H |