void write_json_helper(std::basic_ostream<typename Ptree::key_type::value_type> &stream,
const Ptree &pt,
int indent, bool pretty)
{
typedef typename Ptree::key_type::value_type Ch;
typedef typename std::basic_string<Ch> Str;
// Value or object or array
if (indent > 0 && pt.empty())
{
// Write value
Str data = create_escapes(pt.template get_value<Str>());
stream << Ch('"') << data << Ch('"');
}
else if (indent > 0 && pt.count(Str()) == pt.size())
{
// Write array
stream << Ch('[');
if (pretty) stream << Ch('\n');
typename Ptree::const_iterator it = pt.begin();
for (; it != pt.end(); ++it)
{
if (pretty) stream << Str(4 * (indent + 1), Ch(' '));
write_json_helper(stream, it->second, indent + 1, pretty);
if (lslboost::next(it) != pt.end())
stream << Ch(',');
if (pretty) stream << Ch('\n');
}
stream << Str(4 * indent, Ch(' ')) << Ch(']');
}
else
{
// Write object
stream << Ch('{');
if (pretty) stream << Ch('\n');
typename Ptree::const_iterator it = pt.begin();
for (; it != pt.end(); ++it)
{
if (pretty) stream << Str(4 * (indent + 1), Ch(' '));
stream << Ch('"') << create_escapes(it->first) << Ch('"') << Ch(':');
if (pretty) {
if (it->second.empty())
stream << Ch(' ');
else
stream << Ch('\n') << Str(4 * (indent + 1), Ch(' '));
}
write_json_helper(stream, it->second, indent + 1, pretty);
if (lslboost::next(it) != pt.end())
stream << Ch(',');
if (pretty) stream << Ch('\n');
}
if (pretty) stream << Str(4 * indent, Ch(' '));
stream << Ch('}');
}
}
void write_json_internal(std::basic_ostream<typename Ptree::char_type> &stream,
const Ptree &pt,
const std::string &filename)
{
if (!verify_json(pt, 0))
throw json_parser_error("ptree contains data that cannot be represented in JSON format", filename, 0);
write_json_helper(stream, pt, 0);
stream << std::endl;
if (!stream.good())
throw json_parser_error("write error", filename, 0);
}
void write_json_internal(std::basic_ostream<typename Ptree::key_type::value_type> &stream,
const Ptree &pt,
const std::string &filename,
bool pretty)
{
if (!verify_json(pt, 0))
BOOST_PROPERTY_TREE_THROW(json_parser_error("ptree contains data that cannot be represented in JSON format", filename, 0));
write_json_helper(stream, pt, 0, pretty);
stream << std::endl;
if (!stream.good())
BOOST_PROPERTY_TREE_THROW(json_parser_error("write error", filename, 0));
}
