99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
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/*
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filelistdataprovider.cpp
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This file is part of qgpgme, the Qt API binding for gpgme
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Copyright (c) 2023 g10 Code GmbH
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Software engineering by Ingo Klöcker <dev@ingo-kloecker.de>
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QGpgME is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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QGpgME is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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In addition, as a special exception, the copyright holders give
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permission to link the code of this program with any edition of
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the Qt library by Trolltech AS, Norway (or with modified versions
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of Qt that use the same license as Qt), and distribute linked
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combinations including the two. You must obey the GNU General
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Public License in all respects for all of the code used other than
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Qt. If you modify this file, you may extend this exception to
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your version of the file, but you are not obligated to do so. If
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you do not wish to do so, delete this exception statement from
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your version.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "filelistdataprovider.h"
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#include "dataprovider.h"
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#include <QString>
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#include <gpgme++/error.h>
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#include <numeric>
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using namespace QGpgME;
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using namespace GpgME;
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static QByteArray encodeFilenames(const std::vector<QString> &filenames)
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{
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QByteArray ret;
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if (filenames.empty()) {
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return ret;
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}
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// calculate and reserve the needed minimum size of the result
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const auto addSize = [](unsigned int n, const QString &s) { return n + s.size(); };
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const unsigned int minSize = filenames.size()
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+ std::accumulate(filenames.cbegin(), filenames.cend(), 0u, addSize);
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ret.reserve(minSize);
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// pack the filenames into the byte array
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for (const auto &f : filenames) {
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if (!f.isEmpty()) {
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ret += f.toUtf8() + '\0';
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}
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}
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ret.chop(1); // remove the trailing nul
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return ret;
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}
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FileListDataProvider::FileListDataProvider(const std::vector<QString> &filenames)
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: mProvider{new QByteArrayDataProvider{encodeFilenames(filenames)}}
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{
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}
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FileListDataProvider::~FileListDataProvider() = default;
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ssize_t FileListDataProvider::read(void* buffer, size_t bufSize)
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{
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return mProvider->read(buffer, bufSize);
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}
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ssize_t FileListDataProvider::write(const void *, size_t)
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{
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Error::setSystemError(GPG_ERR_EBADF);
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return -1;
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}
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off_t FileListDataProvider::seek(off_t offset, int whence)
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{
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return mProvider->seek(offset, whence);
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}
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void FileListDataProvider::release()
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{
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mProvider->release();
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}
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