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Diffstat (limited to 'libktorrent/util/ptrmap.h')
| -rw-r--r-- | libktorrent/util/ptrmap.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/libktorrent/util/ptrmap.h b/libktorrent/util/ptrmap.h new file mode 100644 index 0000000..36e1c20 --- /dev/null +++ b/libktorrent/util/ptrmap.h @@ -0,0 +1,181 @@ +/*************************************************************************** + * Copyright (C) 2005 by Joris Guisson * + * joris.guisson@gmail.com * + * * + * 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 2 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, write to the * + * Free Software Foundation, Inc., * + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. * + ***************************************************************************/ +#ifndef BTPTRMAP_H +#define BTPTRMAP_H + +#include <map> + +namespace bt +{ + /** + * @author Joris Guisson + * @brief Map of pointers + * + * A Map where the data is a pointer. The PtrMap has an autodeletion feature. + * When autodelete is on, every time we remove something from the map, the data + * will be deleted. + */ + template <class Key,class Data> + class PtrMap + { + bool autodel; + std::map<Key,Data*> pmap; + public: + /** + * Constructor. + * @param auto_del Wether or not to enable auto deletion + */ + PtrMap(bool autodel = false) : autodel(autodel) + {} + + /** + * Destructor. Will delete all objects, if auto deletion is on. + */ + virtual ~PtrMap() + { + clear(); + } + + + /** + * Return the number of key data pairs in the map. + */ + unsigned int count() const {return pmap.size();} + + /** + * Enable or disable auto deletion. + * @param yes Enable if true, disable if false + */ + void setAutoDelete(bool yes) + { + autodel = yes; + } + + typedef typename std::map<Key,Data*>::iterator iterator; + typedef typename std::map<Key,Data*>::const_iterator const_iterator; + + iterator begin() {return pmap.begin();} + iterator end() {return pmap.end();} + + const_iterator begin() const {return pmap.begin();} + const_iterator end() const {return pmap.end();} + + /** + * Remove all objects, will delete them if autodelete is on. + */ + void clear() + { + if (autodel) + { + for (iterator i = pmap.begin();i != pmap.end();i++) + { + delete i->second; + i->second = 0; + } + } + pmap.clear(); + } + + /** + * Insert a key data pair. + * @param k The key + * @param d The data + * @param overwrite Wether or not to overwrite + * @return true if the insertion took place + */ + bool insert(const Key & k,Data* d,bool overwrite = true) + { + iterator itr = pmap.find(k); + if (itr != pmap.end()) + { + if (overwrite) + { + if (autodel) + delete itr->second; + itr->second = d; + return true; + } + else + { + return false; + } + } + else + { + pmap[k] = d; + return true; + } + } + + /** + * Find a key in the map and returns it's data. + * @param k The key + * @return The data of the key, 0 if the key isn't in the map + */ + Data* find(const Key & k) + { + iterator i = pmap.find(k); + return (i == pmap.end()) ? 0 : i->second; + } + + /** + * Find a key in the map and returns it's data. + * @param k The key + * @return The data of the key, 0 if the key isn't in the map + */ + const Data* find(const Key & k) const + { + const_iterator i = pmap.find(k); + return (i == pmap.end()) ? 0 : i->second; + } + + /** + * Check to see if a key is in the map. + * @param k The key + * @return true if it is part of the map + */ + bool contains(const Key & k) const + { + const_iterator i = pmap.find(k); + return i != pmap.end(); + } + + /** + * Erase a key from the map. Will delete + * the data if autodelete is on. + * @param key The key + * @return true if an erase took place + */ + bool erase(const Key & key) + { + iterator i = pmap.find(key); + if (i == pmap.end()) + return false; + + if (autodel) + delete i->second; + pmap.erase(i); + return true; + } + }; + +} + +#endif |