Mercurial > hg > svcore
view base/TempWriteFile.cpp @ 1540:a53bf95f0bea zoom
Further test
author | Chris Cannam |
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date | Thu, 27 Sep 2018 15:19:39 +0100 |
parents | 48e9f538e6e9 |
children |
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */ /* Sonic Visualiser An audio file viewer and annotation editor. Centre for Digital Music, Queen Mary, University of London. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. See the file COPYING included with this distribution for more information. */ #include "TempWriteFile.h" #include "Exceptions.h" #include <QTemporaryFile> #include <QDir> #include <iostream> TempWriteFile::TempWriteFile(QString target) : m_target(target) { QTemporaryFile temp(m_target + "."); temp.setAutoRemove(false); temp.open(); // creates the file and opens it atomically if (temp.error()) { SVCERR << "TempWriteFile: Failed to create temporary file in directory of " << m_target << ": " << temp.errorString() << endl; throw FileOperationFailed(temp.fileName(), "creation"); } m_temp = temp.fileName(); temp.close(); // does not remove the file } TempWriteFile::~TempWriteFile() { if (m_temp != "") { QDir dir(QFileInfo(m_temp).dir()); dir.remove(m_temp); } } QString TempWriteFile::getTemporaryFilename() { return m_temp; } void TempWriteFile::moveToTarget() { if (m_temp == "") return; QFile tempFile(m_temp); QFile targetFile(m_target); if (targetFile.exists()) { if (!targetFile.remove()) { SVCERR << "TempWriteFile: WARNING: Failed to remove existing target file " << m_target << " prior to moving temporary file " << m_temp << " to it" << endl; } } if (!tempFile.rename(m_target)) { SVCERR << "TempWriteFile: Failed to rename temporary file " << m_temp << " to target " << m_target << endl; throw FileOperationFailed(m_temp, "rename"); } m_temp = ""; }