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//
// Copyright 2010 Ettus Research LLC
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#ifndef INCLUDED_UHD_DICT_HPP
#define INCLUDED_UHD_DICT_HPP
#include <list>
#include <vector>
#include <stdexcept>
#include <boost/foreach.hpp>
namespace uhd{
/*!
* A templated dictionary class with a python-like interface.
*/
template <class Key, class Val> class dict{
public:
typedef std::pair<Key, Val> pair_t;
/*!
* Create a new empty dictionary.
*/
dict(void){
/* NOP */
}
/*!
* Destroy this dict.
*/
~dict(void){
/* NOP */
}
/*!
* Get the number of elements in this dict.
* \param the number of elements
*/
std::size_t size(void) const{
return _map.size();
}
/*!
* Get a list of the keys in this dict.
* Key order depends on insertion precedence.
* \return vector of keys
*/
std::vector<Key> get_keys(void) const{
std::vector<Key> keys;
BOOST_FOREACH(const pair_t &p, _map){
keys.push_back(p.first);
}
return keys;
}
/*!
* Get a list of the values in this dict.
* Value order depends on insertion precedence.
* \return vector of values
*/
std::vector<Val> get_vals(void) const{
std::vector<Val> vals;
BOOST_FOREACH(const pair_t &p, _map){
vals.push_back(p.second);
}
return vals;
}
/*!
* Does the dictionary contain this key?
* \param key the key to look for
* \return true if found
*/
bool has_key(const Key &key) const{
BOOST_FOREACH(const pair_t &p, _map){
if (p.first == key) return true;
}
return false;
}
/*!
* Get a value for the given key if it exists.
* If the key is not found throw an error.
* \param key the key to look for
* \return the value at the key
* \throw an exception when not found
*/
const Val &operator[](const Key &key) const{
BOOST_FOREACH(const pair_t &p, _map){
if (p.first == key) return p.second;
}
throw std::invalid_argument("key not found in dict");
}
/*!
* Set a value for the given key, however, in reality
* it really returns a reference which can be assigned to.
* \param key the key to set to
* \return a reference to the value
*/
Val &operator[](const Key &key){
BOOST_FOREACH(pair_t &p, _map){
if (p.first == key) return p.second;
}
_map.push_back(pair_t(key, Val()));
return _map.back().second;
}
/*!
* Pop an item out of the dictionary.
* \param key the item key
* \return the value of the item
* \throw an exception when not found
*/
Val pop(const Key &key){
Val val = (*this)[key];
_map.remove(pair_t(key, val));
return val;
}
private:
std::list<pair_t> _map; //private container
};
} //namespace uhd
#endif /* INCLUDED_UHD_DICT_HPP */
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