130 lines
2.7 KiB
C++
130 lines
2.7 KiB
C++
// Boost.Geometry
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// Copyright (c) 2008-2012 Barend Gehrels, Amsterdam, the Netherlands.
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// Copyright (c) 2017-2018, Oracle and/or its affiliates.
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// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
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// Use, modification and distribution is subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_GEOMETRY_SRS_PROJECTIONS_PROJ4_HPP
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#define BOOST_GEOMETRY_SRS_PROJECTIONS_PROJ4_HPP
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#include <string>
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#include <vector>
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#include <boost/algorithm/string/trim.hpp>
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namespace boost { namespace geometry
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{
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namespace srs
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{
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struct dynamic {};
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struct proj4
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{
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explicit proj4(const char* s)
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: m_str(s)
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{}
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explicit proj4(std::string const& s)
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: m_str(s)
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{}
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std::string const& str() const
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{
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return m_str;
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}
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private:
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std::string m_str;
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};
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namespace detail
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{
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struct proj4_parameter
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{
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proj4_parameter() {}
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proj4_parameter(std::string const& n, std::string const& v) : name(n), value(v) {}
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std::string name;
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std::string value;
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};
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struct proj4_parameters
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: std::vector<proj4_parameter>
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{
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// Initially implemented as part of pj_init_plus() and pj_init()
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proj4_parameters(std::string const& proj4_str)
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{
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const char* sep = " +";
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/* split into arguments based on '+' and trim white space */
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// boost::split splits on one character, here it should be on " +", so implementation below
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// todo: put in different routine or sort out
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std::string def = boost::trim_copy(proj4_str);
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boost::trim_left_if(def, boost::is_any_of(sep));
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std::string::size_type loc = def.find(sep);
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while (loc != std::string::npos)
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{
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std::string par = def.substr(0, loc);
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boost::trim(par);
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if (! par.empty())
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{
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this->add(par);
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}
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def.erase(0, loc);
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boost::trim_left_if(def, boost::is_any_of(sep));
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loc = def.find(sep);
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}
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if (! def.empty())
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{
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this->add(def);
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}
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}
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void add(std::string const& str)
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{
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std::string name = str;
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std::string value;
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boost::trim_left_if(name, boost::is_any_of("+"));
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std::string::size_type loc = name.find("=");
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if (loc != std::string::npos)
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{
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value = name.substr(loc + 1);
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name.erase(loc);
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}
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this->add(name, value);
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}
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void add(std::string const& name, std::string const& value)
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{
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this->push_back(proj4_parameter(name, value));
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}
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};
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}
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} // namespace srs
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}} // namespace boost::geometry
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#endif // BOOST_GEOMETRY_SRS_PROJECTIONS_PROJ4_HPP
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