127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2015 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_FUNCTION_CALL_HPP
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#define MAPNIK_FUNCTION_CALL_HPP
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#include <mapnik/value.hpp>
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#include <functional>
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#include <algorithm>
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#include <cmath>
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namespace mapnik {
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using value_type = mapnik::value;
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using unary_function_impl = std::function<value_type(value_type const&)>;
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using binary_function_impl = std::function<value_type(value_type const&, value_type const&)>;
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char const* unary_function_name(unary_function_impl const& fun);
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char const* binary_function_name(binary_function_impl const& fun);
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// functions
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// exp
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struct exp_impl
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{
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//using type = T;
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value_type operator() (value_type const& val) const
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{
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return std::exp(val.to_double());
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}
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};
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// sin
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struct sin_impl
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{
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value_type operator() (value_type const& val) const
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{
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return std::sin(val.to_double());
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}
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};
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// cos
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struct cos_impl
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{
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value_type operator() (value_type const& val) const
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{
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return std::cos(val.to_double());
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}
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};
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// tan
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struct tan_impl
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{
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value_type operator() (value_type const& val) const
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{
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return std::tan(val.to_double());
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}
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};
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// atan
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struct atan_impl
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{
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value_type operator()(value_type const& val) const
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{
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return std::atan(val.to_double());
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}
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};
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// abs
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struct abs_impl
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{
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value_type operator() (value_type const& val) const
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{
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return std::fabs(val.to_double());
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}
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};
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// length
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struct length_impl
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{
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value_type operator() (value_type const& val) const
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{
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return val.to_unicode().length();
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}
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};
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// min
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inline value_type min_impl(value_type const& arg1, value_type const& arg2)
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{
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return std::min(arg1.to_double(), arg2.to_double());
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}
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// max
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inline value_type max_impl(value_type const& arg1, value_type const& arg2)
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{
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return std::max(arg1.to_double(), arg2.to_double());
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}
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// pow
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inline value_type pow_impl(value_type const& arg1, value_type const& arg2)
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{
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return std::pow(arg1.to_double(), arg2.to_double());
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}
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} // namespace mapnik
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#endif // MAPNIK_FUNCTION_CALL_HPP
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