thin-provisioning-tools/base/xml_utils.h
2014-08-06 15:29:02 +01:00

43 lines
1.0 KiB
C++

#ifndef BASE_XML_UTILS_H
#define BASE_XML_UTILS_H
#include <boost/lexical_cast.hpp>
#include <boost/optional.hpp>
#include <map>
using namespace std;
//----------------------------------------------------------------
namespace xml_utils {
typedef std::map<std::string, std::string> attributes;
void build_attributes(attributes &a, char const **attr);
template <typename T>
T get_attr(attributes const &attr, string const &key) {
attributes::const_iterator it = attr.find(key);
if (it == attr.end()) {
ostringstream out;
out << "could not find attribute: " << key;
throw runtime_error(out.str());
}
return boost::lexical_cast<T>(it->second);
}
template <typename T>
boost::optional<T> get_opt_attr(attributes const &attr, string const &key) {
typedef boost::optional<T> rtype;
attributes::const_iterator it = attr.find(key);
if (it == attr.end())
return rtype();
return rtype(boost::lexical_cast<T>(it->second));
}
}
//----------------------------------------------------------------
#endif