Recent versions of libxml2 won't load large files

[tverho]

Recently, libxml2 added a safeguard against large xml files, which can be disable with the option XML_PARSE_HUGE. As a consequence LightXML no longer loads large files (in my case, large VTK files with ReadVTK).

A workaround is defining

function LightXML.parse_string(s::AbstractString; huge_tree=true)
    options = 0
    if huge_tree
        options |= 524288
    end
    result = ccall((:xmlReadMemory, LightXML.XML2_jll.libxml2), LightXML.Xptr, (Cstring, Int, Cstring, Cstring, Int), s, sizeof(s), "", Ptr{Nothing}(), options)
    LightXML._check_result(result)
end