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// Boost.Geometry (aka GGL, Generic Geometry Library)
// Unit Test
// Copyright (c) 2014-2022 Barend Gehrels, Amsterdam, the Netherlands.
// Use, modification and distribution is subject to the Boost Software License,
// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_GEOMETRY_TEST_READ_FROM_WKT_FILE_HPP
#define BOOST_GEOMETRY_TEST_READ_FROM_WKT_FILE_HPP
#include <boost/geometry/io/wkt/wkt.hpp>
#include <fstream>
#include <string>
// Reads all geometries from WKT file and return it as one big multi polygon WKT
template <typename MultiPolygon>
inline std::string read_from_wkt_file(std::string const& filename)
{
MultiPolygon mp;
std::ifstream in(filename.c_str());
while (in.good())
{
std::string line;
std::getline(in, line);
if (! line.empty() && line.substr(0, 1) != "#")
{
typename boost::range_value<MultiPolygon>::type geometry;
bg::read_wkt(line, geometry);
mp.push_back(geometry);
}
}
std::ostringstream out;
if (! mp.empty())
{
out << std::fixed << std::setprecision(20) << bg::wkt(mp);
}
return out.str();
}
#endif
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