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author | Ben Longbons <b.r.longbons@gmail.com> | 2014-04-15 20:05:17 -0700 |
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committer | Ben Longbons <b.r.longbons@gmail.com> | 2014-04-19 20:09:35 -0700 |
commit | ceeda2e337077b2edaf1af09cc4df2c30e8205a1 (patch) | |
tree | ab7a70020e1dcac9ee56531c1c5af9888989f4f3 /src/ints/cmp.hpp | |
parent | 147c3e9c891c12dbfd39b65ee0f5baddf5f81b14 (diff) | |
download | tmwa-ceeda2e337077b2edaf1af09cc4df2c30e8205a1.tar.gz tmwa-ceeda2e337077b2edaf1af09cc4df2c30e8205a1.tar.bz2 tmwa-ceeda2e337077b2edaf1af09cc4df2c30e8205a1.tar.xz tmwa-ceeda2e337077b2edaf1af09cc4df2c30e8205a1.zip |
Wouldn't it be nice to have some integers too?
Diffstat (limited to 'src/ints/cmp.hpp')
-rw-r--r-- | src/ints/cmp.hpp | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/ints/cmp.hpp b/src/ints/cmp.hpp new file mode 100644 index 0000000..b979c46 --- /dev/null +++ b/src/ints/cmp.hpp @@ -0,0 +1,65 @@ +#ifndef TMWA_INTS_CMP_HPP +#define TMWA_INTS_CMP_HPP +// cmp.hpp - comparison related operations +// +// Copyright © 2014 Ben Longbons <b.r.longbons@gmail.com> +// +// This file is part of The Mana World (Athena server) +// +// 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 3 of the License, or +// (at your option) any later version. +// +// 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 General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program. If not, see <http://www.gnu.org/licenses/>. + +# include "../sanity.hpp" + +# include <limits> + +namespace ints +{ + template<class T, class U> + T saturate(const U& v) + { + typedef std::numeric_limits<T> Tlim; + typedef std::numeric_limits<U> Ulim; + + if (Tlim::is_signed == Ulim::is_signed) + { + if (v > Tlim::max()) + return Tlim::max(); + if (v < Tlim::min()) + return Tlim::min(); + return v; + } + else if (Ulim::is_signed) + { + // from signed to unsigned + + // Not like v < Tlim::min(), even though Tlim::min() == 0 + if (v < 0) + return 0; + if (v > Tlim::max()) + return Tlim::max(); + return v; + } + else // Tlim::is_signed + { + // from unsigned to signed + if (v > Tlim::max()) + return Tlim::max(); + return v; + } + } +} // namespace ints + +using ints::saturate; + +#endif // TMWA_INTS_CMP_HPP |