thin-provisioning-tools/dbg-lib/output_formatter.cc

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#include <string>
#include "dbg-lib/output_formatter.h"
using namespace dbg;
using namespace std;
//----------------------------------------------------------------
namespace {
class abstract_formatter : public formatter {
typedef boost::optional<std::string> maybe_string;
void field(std::string const &name, std::string const &value) {
fields_.push_back(field_type(name, value));
}
void child(std::string const &name, formatter::ptr t) {
children_.push_back(field_type(name, t));
}
protected:
typedef boost::variant<std::string, ptr> value;
typedef boost::tuple<std::string, value> field_type;
std::vector<field_type> fields_;
std::vector<field_type> children_;
};
class xml_formatter : public abstract_formatter {
public:
void output(std::ostream &out, int depth = 0,
boost::optional<std::string> name = boost::none);
};
void indent(int depth, std::ostream &out) {
for (int i = 0; i < depth * 2; i++)
out << ' ';
}
}
//----------------------------------------------------------------
void xml_formatter::output(std::ostream &out,
int depth,
boost::optional<std::string> name) {
indent(depth, out);
out << "<fields";
if (name && (*name).length())
out << " id=\"" << *name << "\"";
/* output non-child fields */
std::vector<field_type>::const_iterator it;
for (it = fields_.begin(); it != fields_.end(); ++it) {
if (string const *s = boost::get<string>(&it->get<1>())) {
out << " " << it->get<0>() << "=\"" << *s << "\"";
}
}
if (children_.size() == 0) {
out << " />" << endl;
return;
}
/* output child fields */
out << ">" << endl;
for (it = children_.begin(); it != children_.end(); ++it) {
if (!boost::get<string>(&it->get<1>())) {
formatter::ptr f = boost::get<formatter::ptr>(it->get<1>());
f->output(out, depth + 1, it->get<0>());
}
}
indent(depth, out);
out << "</fields>" << endl;
}
//----------------------------------------------------------------
formatter::ptr
dbg::create_xml_formatter()
{
return formatter::ptr(new xml_formatter());
}
//----------------------------------------------------------------