/usr/include/mapnik/function_call.hpp is in libmapnik-dev 3.0.12+ds-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_FUNCTION_CALL_HPP
#define MAPNIK_FUNCTION_CALL_HPP
#include <mapnik/value.hpp>
#include <functional>
#include <algorithm>
#include <cmath>
namespace mapnik {
using value_type = mapnik::value;
using unary_function_impl = std::function<value_type(value_type const&)>;
using binary_function_impl = std::function<value_type(value_type const&, value_type const&)>;
char const* unary_function_name(unary_function_impl const& fun);
char const* binary_function_name(binary_function_impl const& fun);
// functions
// exp
struct exp_impl
{
//using type = T;
value_type operator() (value_type const& val) const
{
return std::exp(val.to_double());
}
};
// log
struct log_impl
{
//using type = T;
value_type operator() (value_type const& val) const
{
return std::log(val.to_double());
}
};
// sin
struct sin_impl
{
value_type operator() (value_type const& val) const
{
return std::sin(val.to_double());
}
};
// cos
struct cos_impl
{
value_type operator() (value_type const& val) const
{
return std::cos(val.to_double());
}
};
// tan
struct tan_impl
{
value_type operator() (value_type const& val) const
{
return std::tan(val.to_double());
}
};
// atan
struct atan_impl
{
value_type operator()(value_type const& val) const
{
return std::atan(val.to_double());
}
};
// abs
struct abs_impl
{
value_type operator() (value_type const& val) const
{
return std::fabs(val.to_double());
}
};
// length
struct length_impl
{
value_type operator() (value_type const& val) const
{
return val.to_unicode().length();
}
};
// min
inline value_type min_impl(value_type const& arg1, value_type const& arg2)
{
return std::min(arg1.to_double(), arg2.to_double());
}
// max
inline value_type max_impl(value_type const& arg1, value_type const& arg2)
{
return std::max(arg1.to_double(), arg2.to_double());
}
// pow
inline value_type pow_impl(value_type const& arg1, value_type const& arg2)
{
return std::pow(arg1.to_double(), arg2.to_double());
}
} // namespace mapnik
#endif // MAPNIK_FUNCTION_CALL_HPP
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