+/* Copyright (c) 2015 Regents of the University of California
+ *
+ * Author: Brian Demsky <bdemsky@uci.edu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ */
+
+#ifndef HASH_SET_H
+#define HASH_SET_H
+#include "hashtable.h"
+
+template<typename _Key>
+struct LinkNode {
+ _Key key;
+ LinkNode<_Key> *prev;
+ LinkNode<_Key> *next;
+};
+
+template<typename _Key, typename _KeyInt, int _Shift, void *
+ (* _malloc)(size_t), void * (* _calloc)(size_t, size_t), void (*_free)(void *), unsigned int (*hash_function
+ )(_Key), bool (*equals)(_Key, _Key)>
+class HashSet;
+
+template<typename _Key, typename _KeyInt, int _Shift, void * (* _malloc)(size_t), void * (* _calloc)(size_t, size_t), void (*_free)(void *), unsigned int (*hash_function)(_Key) = default_hash_function<_Key, _Shift, _KeyInt>, bool (*equals)(_Key, _Key) = default_equals<_Key> >
+class HSIterator {
+public:
+ HSIterator(LinkNode<_Key> *_curr, HashSet <_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * _set) :
+ curr(_curr),
+ set(_set)
+ {
+ }
+
+ /** Override: new operator */
+ void * operator new(size_t size) {
+ return _malloc(size);
+ }
+
+ /** Override: delete operator */
+ void operator delete(void *p, size_t size) {
+ _free(p);
+ }
+
+ /** Override: new[] operator */
+ void * operator new[](size_t size) {
+ return _malloc(size);
+ }
+
+ /** Override: delete[] operator */
+ void operator delete[](void *p, size_t size) {
+ _free(p);
+ }
+
+ bool hasNext() {
+ return curr!=NULL;
+ }
+
+ _Key next() {
+ _Key k=curr->key;
+ last=curr;
+ curr=curr->next;
+ return k;
+ }
+
+ _Key currKey() {
+ return last->key;
+ }
+
+ void remove() {
+ _Key k=last->key;
+ set->remove(k);
+ }
+
+private:
+ LinkNode<_Key> *curr;
+ LinkNode<_Key> *last;
+ HashSet <_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * set;
+};
+
+template<typename _Key, typename _KeyInt, int _Shift = 0, void * (* _malloc)(size_t) = snapshot_malloc, void * (* _calloc)(size_t, size_t) = snapshot_calloc, void (*_free)(void *) = snapshot_free, unsigned int (*hash_function)(_Key) = default_hash_function<_Key, _Shift, _KeyInt>, bool (*equals)(_Key, _Key) = default_equals<_Key> >
+class HashSet {
+public:
+ HashSet(unsigned int initialcapacity = 16, double factor = 0.5) :
+ table(new HashTable<_Key, LinkNode<_Key> *, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals>(initialcapacity, factor)),
+ list(NULL),
+ tail(NULL)
+ {
+ }
+
+ /** @brief Hashset destructor */
+ ~HashSet() {
+ LinkNode<_Key> *tmp=list;
+ while(tmp!=NULL) {
+ LinkNode<_Key> *tmpnext=tmp->next;
+ _free(tmp);
+ tmp=tmpnext;
+ }
+ delete table;
+ }
+
+ HashSet<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * copy() {
+ HashSet<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> *copy=new HashSet<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals>(table->getCapacity(), table->getLoadFactor());
+ HSIterator<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * it=iterator();
+ while(it->hasNext())
+ copy->add(it->next());
+ delete it;
+ return copy;
+ }
+
+ void reset() {
+ LinkNode<_Key> *tmp=list;
+ while(tmp!=NULL) {
+ LinkNode<_Key> *tmpnext=tmp->next;
+ _free(tmp);
+ tmp=tmpnext;
+ }
+ list=tail=NULL;
+ table->reset();
+ }
+
+ /** @brief Adds a new key to the hashset. Returns false if the key
+ * is already present. */
+
+ bool add(_Key key) {
+ LinkNode<_Key> * val=table->get(key);
+ if (val==NULL) {
+ LinkNode<_Key> * newnode=(LinkNode<_Key> *)_malloc(sizeof(struct LinkNode<_Key>));
+ newnode->prev=tail;
+ newnode->next=NULL;
+ newnode->key=key;
+ if (tail!=NULL)
+ tail->next=newnode;
+ else
+ list=newnode;
+ tail=newnode;
+ table->put(key, newnode);
+ return true;
+ } else
+ return false;
+ }
+
+ /** @brief Gets the original key corresponding to this one from the
+ * hashset. Returns NULL if not present. */
+
+ _Key get(_Key key) {
+ LinkNode<_Key> * val=table->get(key);
+ if (val!=NULL)
+ return val->key;
+ else
+ return NULL;
+ }
+
+ _Key getFirstKey() {
+ return list->key;
+ }
+
+ bool contains(_Key key) {
+ return table->get(key)!=NULL;
+ }
+
+ bool remove(_Key key) {
+ LinkNode<_Key> * oldlinknode;
+ oldlinknode=table->get(key);
+ if (oldlinknode==NULL) {
+ return false;
+ }
+ table->remove(key);
+
+ //remove link node from the list
+ if (oldlinknode->prev==NULL)
+ list=oldlinknode->next;
+ else
+ oldlinknode->prev->next=oldlinknode->next;
+ if (oldlinknode->next!=NULL)
+ oldlinknode->next->prev=oldlinknode->prev;
+ else
+ tail=oldlinknode->prev;
+ _free(oldlinknode);
+ return true;
+ }
+
+ unsigned int getSize() {
+ return table->getSize();
+ }
+
+ bool isEmpty() {
+ return getSize()==0;
+ }
+
+
+
+ HSIterator<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * iterator() {
+ return new HSIterator<_Key, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals>(list, this);
+ }
+
+ /** Override: new operator */
+ void * operator new(size_t size) {
+ return _malloc(size);
+ }
+
+ /** Override: delete operator */
+ void operator delete(void *p, size_t size) {
+ _free(p);
+ }
+
+ /** Override: new[] operator */
+ void * operator new[](size_t size) {
+ return _malloc(size);
+ }
+
+ /** Override: delete[] operator */
+ void operator delete[](void *p, size_t size) {
+ _free(p);
+ }
+private:
+ HashTable<_Key, LinkNode<_Key>*, _KeyInt, _Shift, _malloc, _calloc, _free, hash_function, equals> * table;
+ LinkNode<_Key> *list;
+ LinkNode<_Key> *tail;
+};
+#endif
projects / c11tester.git / commitdiff