mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2020 OpenVPN Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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// Sometimes you want to accept a <typename STRING> in a
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// method, without knowing whether it's a const char *,
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// const std::string&, or nullptr. These methods help with
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// basic type-independent string operations.
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#ifndef OPENVPN_COMMON_STRINGTEMPL_H
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#define OPENVPN_COMMON_STRINGTEMPL_H
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#include <string>
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#include <cstddef> // for std::nullptr_t
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#include <utility>
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namespace openvpn {
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namespace StringTempl {
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// empty
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inline bool empty(std::nullptr_t)
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{
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return true;
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}
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inline bool empty(const char *str)
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{
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return !str || str[0] == '\0';
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}
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inline bool empty(const std::string& str)
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{
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return str.empty();
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}
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// to_string
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inline std::string to_string(std::nullptr_t)
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{
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return std::string();
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}
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inline std::string to_string(const char *str)
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{
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if (str)
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return std::string(str);
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else
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return to_string(nullptr);
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}
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inline std::string to_string(std::string&& str)
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{
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return std::move(str);
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}
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inline const std::string& to_string(const std::string& str)
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{
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return str;
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}
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// to_cstring
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inline const char *to_cstring(const std::string& str)
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{
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return str.c_str();
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}
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inline const char *to_cstring(const char *str)
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{
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return str;
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}
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}
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}
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#endif
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