From 427c7147d23fa21c6e8bd08407b1badc48b49c3c Mon Sep 17 00:00:00 2001 From: Oswald Buddenhagen Date: Mon, 22 May 2017 16:44:51 +0200 Subject: move everying into sources/pyside2 (5.9 edition) in preparation for a subtree merge. this should not be necessary to do in a separate commit, but git is a tad stupid about following history correctly without it. --- .../snippets/code/src_corelib_io_qdatastream.cpp | 135 +++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp (limited to 'sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp') diff --git a/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp new file mode 100644 index 000000000..dff0b2c7c --- /dev/null +++ b/sources/pyside2/doc/codesnippets/doc/src/snippets/code/src_corelib_io_qdatastream.cpp @@ -0,0 +1,135 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the documentation of PySide2. +** +** $QT_BEGIN_LICENSE:BSD$ +** 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. +** +** BSD License Usage +** Alternatively, you may use this file under the terms of the BSD license +** as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of The Qt Company Ltd nor the names of its +** contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +void wrapInFunction() +{ + +//! [0] +file_ = QFile("file.dat") +file_.open(QIODevice.WriteOnly) +# we will serialize the data into the file +out = QDataStream(file_) +# serialize a string +out.writeQString("the answer is") +# serialize an integer +out.writeInt32(42) +//! [0] + + +//! [1] +file_ = QFile("file.dat") +file_.open(QIODevice.ReadOnly) +# read the data serialized from the file +i = QDataStream(file_) +string = '' +a = 0 +# extract "the answer is" and 42 +string = i.readQString() +a = i.readInt32() +//! [1] + + +//! [2] +stream.setVersion(QDataStream.Qt_4_0) +//! [2] + + +//! [3] +file_ = QFile("file.xxx") +file_.open(QIODevice.WriteOnly) +out = QDataStream(file_) + +# Write a header with a "magic number" and a version +out.writeInt32(0xA0B0C0D0) +out.writeInt32(123) + +out.setVersion(QDataStream.Qt_4_0) + +// Write the data +out << lots_of_interesting_data +//! [3] + + +//! [4] +file_ = QFile("file.xxx") +file_.open(QIODevice.ReadOnly) +i = QDataStream(file_) + +// Read and check the header +magic = i.readInt32() +if magic != 0xA0B0C0D0: + return XXX_BAD_FILE_FORMAT + +// Read the version +version = i.readInt32() +if version < 100: + return XXX_BAD_FILE_TOO_OLD +if version > 123: + return XXX_BAD_FILE_TOO_NEW + +if version <= 110: + in_.setVersion(QDataStream.Qt_3_2) +else: + in_.setVersion(QDataStream.Qt_4_0) + +// Read the data +in_ >> lots_of_interesting_data +if version >= 120: + in_ >> data_new_in_XXX_version_1_2 +in_ >> other_interesting_data +//! [4] + + +//! [5] +out = QDataStream(file_) +out.setVersion(QDataStream.Qt_4_0) +//! [5] + +} -- cgit v1.2.3