wkb_buffer_ptr to_wkb(geometry_container const& paths, wkbByteOrder byte_order )
{
if (paths.size() == 1)
{
// single geometry
return to_wkb(paths.front(), byte_order);
}
if (paths.size() > 1)
{
// multi geometry or geometry collection
std::vector<wkb_buffer_ptr> wkb_cont;
bool collection = false;
int multi_type = 0;
size_t multi_size = 1 + 4 + 4;
for (auto const& geom : paths)
{
wkb_buffer_ptr wkb = to_wkb(geom,byte_order);
multi_size += wkb->size();
int type = static_cast<int>(geom.type());
if (multi_type > 0 && multi_type != geom.type())
collection = true;
multi_type = type;
wkb_cont.push_back(std::move(wkb));
}
wkb_buffer_ptr multi_wkb = std::make_unique<wkb_buffer>(multi_size);
wkb_stream ss(multi_wkb->buffer(), multi_wkb->size());
ss.write(reinterpret_cast<char*>(&byte_order),1);
multi_type = collection ? 7 : multi_type + 3;
write(ss,multi_type, 4, byte_order);
write(ss,paths.size(),4,byte_order);
for ( wkb_buffer_ptr const& wkb : wkb_cont)
{
ss.write(wkb->buffer(),wkb->size());
}
return std::move(multi_wkb);
}
return wkb_buffer_ptr();
}
wkb_buffer_ptr to_wkb(geometry_container const& paths, wkbByteOrder byte_order )
{
if (paths.size() == 1)
{
// single geometry
return to_wkb(paths.front(), byte_order);
}
if (paths.size() > 1)
{
// multi geometry or geometry collection
std::vector<wkb_buffer_ptr> wkb_cont;
bool collection = false;
int multi_type = 0;
size_t multi_size = 1 + 4 + 4;
geometry_container::const_iterator itr = paths.begin();
geometry_container::const_iterator end = paths.end();
for ( ; itr!=end; ++itr)
{
wkb_buffer_ptr wkb = to_wkb(*itr,byte_order);
multi_size += wkb->size();
int type = static_cast<int>(itr->type());
if (multi_type > 0 && multi_type != itr->type())
collection = true;
multi_type = type;
wkb_cont.push_back(std::move(wkb));
}
wkb_buffer_ptr multi_wkb( new wkb_buffer(multi_size));
wkb_stream ss(multi_wkb->buffer(), multi_wkb->size());
ss.write(reinterpret_cast<char*>(&byte_order),1);
multi_type = collection ? 7 : multi_type + 3;
write(ss,multi_type, 4, byte_order);
write(ss,paths.size(),4,byte_order);
for ( wkb_buffer_ptr const& wkb : wkb_cont)
{
ss.write(wkb->buffer(),wkb->size());
}
return std::move(multi_wkb);
}
return wkb_buffer_ptr();
}