3d7810e8d9
* lang/cpp/src/util.h (class StringsToCStrings): New. * lang/cpp/src/util.cpp: New. * lang/cpp/src/Makefile.am: Add new file. -- This adapter simplifies passing a vector of strings as NULL-terminated array of const char* to the C-interface of gpgme. GnuPG-bug-id: 5808
48 lines
1.5 KiB
C++
48 lines
1.5 KiB
C++
/*
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util.cpp - some internal helpers
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Copyright (c) 2022 g10 Code GmbH
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Software engineering by Ingo Klöcker <dev@ingo-kloecker.de>
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This file is part of GPGME++.
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GPGME++ is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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GPGME++ 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
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GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public License
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along with GPGME++; see the file COPYING.LIB. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA.
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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 "util.h"
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#include <functional>
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StringsToCStrings::StringsToCStrings(const std::vector<std::string>& v)
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: m_strings{v}
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{
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}
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const char **StringsToCStrings::c_strs() const
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{
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if (m_cstrings.empty()) {
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m_cstrings.reserve(m_strings.size() + 1);
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std::transform(std::begin(m_strings), std::end(m_strings),
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std::back_inserter(m_cstrings),
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std::mem_fn(&std::string::c_str));
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m_cstrings.push_back(nullptr);
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}
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return m_cstrings.data();
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}
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