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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 <map>
#include <vector>
#include <stdexcept>
#include <boost/foreach.hpp>
namespace uhd{
/*!
* A templated dictionary class with a python-like interface.
* Its wraps around a std::map internally.
*/
template <class Key, class Val> class dict{
public:
typedef std::map<Key, Val> map_t;
typedef std::pair<Key, Val> pair_t;
/*!
* Create a new empty dictionary.
*/
dict(void){
/* NOP */
}
/*!
* Create a dictionary from a map.
* \param map a map with key value pairs
*/
dict(const map_t &map){
_map = map;
}
/*!
* Destroy this dict.
*/
~dict(void){
/* NOP */
}
/*!
* Get a list of the keys in this dict.
* \return vector of keys
*/
std::vector<Key> get_keys(void) const{
std::vector<Key> keys;
BOOST_FOREACH(pair_t p, _map){
keys.push_back(p.first);
}
return keys;
}
/*!
* Get a list of the values in this dict.
* \return vector of values
*/
std::vector<Val> get_vals(void) const{
std::vector<Val> vals;
BOOST_FOREACH(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(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{
if (has_key(key)){
return _map.find(key)->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){
return _map[key];
}
/*!
* 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_key(const Key &key){
if (has_key(key)){
Val val = _map.find(key)->second;
_map.erase(key);
return val;
}
throw std::invalid_argument("key not found in dict");
}
private:
map_t _map; //private container
};
} //namespace uhd
#endif /* INCLUDED_UHD_DICT_HPP */
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