Function parseFromStream

Timeout/InkeysTimeout/json/lib_json/json_reader.cpp:1993–2003

	// global functions

	bool parseFromStream(CharReader::Factory const& fact, IStream& sin, Value* root,
		String* errs) {
		OStringStream ssin;
		ssin << sin.rdbuf();
		String doc = ssin.str();
		char const* begin = doc.data();
		char const* end = begin + doc.size();
		// Note that we do not actually need a null-terminator.
		CharReaderPtr const reader(fact.newCharReader());
		return reader->parse(begin, end, root, errs);
	}

	IStream& operator>>(IStream& sin, Value& root) {
		CharReaderBuilder b;