123 lines
3.3 KiB
C++
123 lines
3.3 KiB
C++
///@file
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/// Conversion functions to convert C++ types to Nasal types
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///
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// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
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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 Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 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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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library 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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#ifndef SG_TO_NASAL_HXX_
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#define SG_TO_NASAL_HXX_
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#include "nasal_traits.hxx"
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#include <simgear/nasal/nasal.h>
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#include <boost/utility/enable_if.hpp>
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#include <boost/type_traits.hpp>
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#include <string>
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#include <vector>
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namespace nasal
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{
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class Hash;
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/**
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* Convert std::string to Nasal string
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*/
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naRef to_nasal(naContext c, const std::string& str);
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/**
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* Convert C-string to Nasal string
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*/
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// We need this to prevent the array overload of to_nasal being called
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naRef to_nasal(naContext c, const char* str);
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/**
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* Convert function pointer to Nasal function
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*/
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naRef to_nasal(naContext c, naCFunction func);
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/**
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* Convert a nasal::Hash to a Nasal hash
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*/
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naRef to_nasal(naContext c, const Hash& hash);
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/**
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* Simple pass-through of naRef types to allow generic usage of to_nasal
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*/
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naRef to_nasal(naContext c, naRef ref);
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/**
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* Convert a numeric type to Nasal number
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*/
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template<class T>
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typename boost::enable_if< boost::is_arithmetic<T>, naRef >::type
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to_nasal(naContext c, T num)
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{
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return naNum(num);
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}
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/**
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* Convert a fixed size array to a Nasal vector
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*/
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template<class T, size_t N>
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naRef to_nasal(naContext c, const T(&array)[N])
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{
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naRef ret = naNewVector(c);
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naVec_setsize(c, ret, N);
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for(size_t i = 0; i < N; ++i)
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naVec_set(ret, i, to_nasal(c, array[i]));
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return ret;
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}
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/**
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* Convert std::vector to Nasal vector
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*/
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template< template<class T, class Alloc> class Vector,
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class T,
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class Alloc
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>
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typename boost::enable_if< boost::is_same< Vector<T,Alloc>,
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std::vector<T,Alloc>
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>,
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naRef
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>::type
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to_nasal(naContext c, const Vector<T, Alloc>& vec)
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{
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naRef ret = naNewVector(c);
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naVec_setsize(c, ret, vec.size());
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for(size_t i = 0; i < vec.size(); ++i)
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naVec_set(ret, i, to_nasal(c, vec[i]));
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return ret;
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}
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/**
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* Convert a 2d vector to Nasal vector with 2 elements
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*/
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template<class Vec2>
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typename boost::enable_if<is_vec2<Vec2>, naRef>::type
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to_nasal(naContext c, const Vec2& vec)
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{
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// We take just double because in Nasal every number is represented as
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// double
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double nasal_vec[2] = {vec[0], vec[1]};
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return to_nasal(c, nasal_vec);
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}
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} // namespace nasal
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#endif /* SG_TO_NASAL_HXX_ */
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