diff options
Diffstat (limited to 'doc/src/snippets/code/src_corelib_io_qdatastream.cpp')
-rw-r--r-- | doc/src/snippets/code/src_corelib_io_qdatastream.cpp | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/doc/src/snippets/code/src_corelib_io_qdatastream.cpp b/doc/src/snippets/code/src_corelib_io_qdatastream.cpp deleted file mode 100644 index af2d7d24bf..0000000000 --- a/doc/src/snippets/code/src_corelib_io_qdatastream.cpp +++ /dev/null @@ -1,121 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). -** Contact: http://www.qt-project.org/ -** -** This file is part of the documentation of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** 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 Nokia Corporation and its Subsidiary(-ies) 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] -QFile file("file.dat"); -file.open(QIODevice::WriteOnly); -QDataStream out(&file); // we will serialize the data into the file -out << QString("the answer is"); // serialize a string -out << (qint32)42; // serialize an integer -//! [0] - - -//! [1] -QFile file("file.dat"); -file.open(QIODevice::ReadOnly); -QDataStream in(&file); // read the data serialized from the file -QString str; -qint32 a; -in >> str >> a; // extract "the answer is" and 42 -//! [1] - - -//! [2] -stream.setVersion(QDataStream::Qt_4_0); -//! [2] - - -//! [3] -QFile file("file.xxx"); -file.open(QIODevice::WriteOnly); -QDataStream out(&file); - -// Write a header with a "magic number" and a version -out << (quint32)0xA0B0C0D0; -out << (qint32)123; - -out.setVersion(QDataStream::Qt_4_0); - -// Write the data -out << lots_of_interesting_data; -//! [3] - - -//! [4] -QFile file("file.xxx"); -file.open(QIODevice::ReadOnly); -QDataStream in(&file); - -// Read and check the header -quint32 magic; -in >> magic; -if (magic != 0xA0B0C0D0) - return XXX_BAD_FILE_FORMAT; - -// Read the version -qint32 version; -in >> version; -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] -QDataStream out(file); -out.setVersion(QDataStream::Qt_4_0); -//! [5] - -} |