149 lines
3.6 KiB
C++
149 lines
3.6 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) 2014 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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#include <mapnik/function_call.hpp>
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namespace mapnik {
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// functions
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// exp
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//template <typename T>
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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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unary_function_types::unary_function_types()
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{
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add
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("sin", sin_impl())
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("cos", cos_impl())
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("tan", tan_impl())
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("atan", atan_impl())
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("exp", exp_impl())
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("abs", abs_impl())
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;
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}
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char const* unary_function_name(unary_function_impl const& fun)
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{
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if (fun.target<sin_impl>()) return "sin";
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else if (fun.target<cos_impl>()) return "cos";
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else if (fun.target<tan_impl>()) return "tan";
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else if (fun.target<atan_impl>()) return "atan";
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else if (fun.target<exp_impl>()) return "exp";
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else if (fun.target<abs_impl>()) return "abs";
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else return "unknown";
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}
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// binary functions
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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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binary_function_types::binary_function_types()
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{
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add
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("min", binary_function_impl(min_impl))
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("max", binary_function_impl(max_impl))
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("pow", binary_function_impl(pow_impl))
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;
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}
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char const* binary_function_name(binary_function_impl const& fun)
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{
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value_type(*const* f_ptr)(value_type const&, value_type const&) =
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fun.target<value_type(*)
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(value_type const&, value_type const&)>();
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if (f_ptr)
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{
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if (*f_ptr == min_impl) return "min";
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else if(*f_ptr == max_impl) return "max";
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else if(*f_ptr == pow_impl) return "pow";
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}
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return "unknown";
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}
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}
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