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// OpenVPN -- An application to securely tunnel IP networks
// over a single port, with support for SSL/TLS-based
// session authentication and key exchange,
// packet encryption, packet authentication, and
// packet compression.
//
// Copyright (C) 2012-2022 OpenVPN Inc.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License Version 3
// as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program in the COPYING file.
// If not, see <http://www.gnu.org/licenses/>.
#pragma once
// loose emulation of std::clamp for pre-C++17
namespace openvpn {
template <typename T>
T clamp(T value, T low, T high)
{
if (value < low)
return low;
else if (value > high)
return high;
else
return value;
}
// like clamp() above, but only clamp non-zero values
template <typename T>
T clamp_nonzero(T value, T low, T high)
{
if (value)
return clamp(value, low, high);
else
return value;
}
} // namespace openvpn
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