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Function to also parse SVG from iostreams

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This commit is contained in:
Daniel Patterson 2015-06-17 15:19:50 -07:00
parent 93d59cde02
commit a4f51e92c9
1 changed files with 38 additions and 0 deletions
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38
src/svg/svg_parser.cpp
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@ -41,6 +41,9 @@
#include <boost/spirit/include/phoenix_operator.hpp>
#include <boost/fusion/include/std_pair.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/iostreams/device/file.hpp>
#include <boost/iostreams/device/array.hpp>
#include <boost/iostreams/stream.hpp>
#pragma GCC diagnostic pop
#include <string>
@ -1089,5 +1092,40 @@ void svg_parser::parse_from_string(std::string const& svg)
}
}
template <typename T>
int xmlInputReadCallback(boost::iostreams::stream<T> * stream, char * buffer, int len) {
stream->read(buffer,len);
return stream->gcount();
}
template <typename T>
int xmlInputCloseCallback(boost::iostreams::stream<T> * stream)
{
if(stream->close())
{
return 0;
}
return -1;
}
template <typename T>
void svg_parser::parse_from_stream(boost::iostreams::stream<T> const& svg_stream)
{
xmlTextReaderPtr reader = xmlReaderForIO(xmlInputReadCallback<T>,
xmlInputCloseCallback<T>
&svg_stream,
nullptr,
nullptr,
(XML_PARSE_NOBLANKS | XML_PARSE_NOCDATA | XML_PARSE_NOERROR | XML_PARSE_NOWARNING));
if (reader == nullptr)
{
MAPNIK_LOG_ERROR(svg_parser) << "Unable to parse SVG";
}
else if (!parse_reader(*this,reader))
{
MAPNIK_LOG_ERROR(svg_parser) << "Unable to parse SVG";
}
}
}}