/******************************************************************************
*
* Copyright (c) 2014 Antillia.com TOSHIYUKI ARAI. ALL RIGHTS RESERVED.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions, and the following disclaimer.
*
* 2. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*
* HashTable.h
*
*****************************************************************************/
#pragma once
#include <oz++/CommonObject.h>
#include <oz++/HashEntry.h>
namespace OZ {
class HashTable :public CommonObject {
private:
int size;
HashEntry** table;
bool gc;//2015/02/15
private:
Key hash(const Key key)
{
return (key % size);
}
private:
Key hash(const char* key)
{
long sum = 0;
int len = strlen(key);
for(int i = 0; i<len; i++) {
sum = sum + ((int)*key % size);
key++;
}
return (Key)(sum % size);
}
public:
HashTable(int size1, bool doGC=false)
{
gc = doGC; //2015/0215
size = size1;
table = new HashEntry*[size];
for (int i =0 ; i<size; i++) {
table[i] = NULL;
}
}
public:
int add(Key key, CommonObject* object, int id)
{
int n = hash(key);
HashEntry* ptr = table[n];
HashEntry* prev = ptr;
int rc = True;
if(ptr == NULL) {
table[n] = new HashEntry(key, object, id);
} else {
while(ptr) {
prev = ptr;
ptr = ptr -> getNext();
if(prev->getIntKey() == key &&
prev->getSubKey() == id) {
rc = False;
break;
}
}
if(rc == True) {
prev -> setNext(new HashEntry(key, object, id));
}
}
return rc;
}
public:
int add(const char* key, CommonObject* object)
{
int n = hash(key);
HashEntry* ptr = table[n];
HashEntry* prev = ptr;
int rc = True;
if(ptr == NULL) {
table[n] = new HashEntry(key, object);
} else {
while(ptr) {
prev = ptr;
ptr = ptr -> getNext();
if(prev->getCharKey() == key) {
rc = False;
break;
}
}
if(rc == True) {
prev -> setNext(new HashEntry(key, object));
}
}
return rc;
}
public:
void enableGC()
{
gc = true;
}
void disableGC()
{
gc = false;
}
public:
CommonObject* lookup(Key key)
{
CommonObject* object = NULL;
Key n = hash(key);
HashEntry* ptr = table[n];
while (ptr) {
if (ptr -> getIntKey() == key) {
object = ptr -> getObject();
break;
}
ptr = ptr -> getNext();
}
return object;
}
public:
CommonObject* lookup(Key key, int id)
{
CommonObject* object = NULL;
int n = hash(key);
HashEntry* ptr = table[n];
while (ptr) {
if(ptr -> getIntKey() == key &&
ptr -> getSubKey() == id){
object = ptr -> getObject();
break;
}
ptr = ptr -> getNext();
}
return object;
}
public:
CommonObject* lookup(const char* key)
{
Key n = hash(key);
HashEntry* ptr = table[n];
CommonObject* object = NULL;
while (ptr) {
if(strcmp(ptr -> getCharKey(), key)==0) {
object = ptr->getObject();
break;
}
ptr = ptr -> getNext();
}
return object;
}
public:
void remove(HashEntry* prev, HashEntry* ptr, int n)
{
if(prev == ptr) {
table[n] = ptr -> getNext();
} else {
prev -> setNext(ptr -> getNext());
}
delete ptr;
}
public:
int remove(Key key)
{
Key n = hash(key);
HashEntry* ptr = table[n];
HashEntry* prev = ptr;
while(ptr) {
if(ptr -> getIntKey() == key) {
remove(prev, ptr, n);
return True;
}
prev = ptr;
ptr = ptr -> getNext();
}
return False;
}
public:
int remove(const char* key)
{
Key n = hash(key);
HashEntry* ptr = table[n];
HashEntry* prev = ptr;
while (ptr) {
if(strcmp(ptr -> getCharKey(), key)==0 ) {
remove(prev, ptr, n);
return True;
}
prev = ptr;
ptr = ptr -> getNext();
}
return False;
}
public:
~HashTable()
{
clear();
}
void clear()
{
if (table) {
for(int i = 0; i < size; i++) {
HashEntry* ptr = table[i];
HashEntry* prev = ptr;
while(ptr) {
prev = ptr;
ptr = ptr -> getNext();
//2015/02/15
if (gc) {
CommonObject* object = prev->getObject();
if (object) {
//printf("HashTable::~HashTable gc\n");
delete object;
prev -> setObject(NULL);
}
}
//
delete prev;
}
}
delete [] table;
}
table = NULL;
}
public:
//2014/12/20
void display()
{
for(int i = 0; i < size; i++) {
HashEntry* ptr = table[i];
while(ptr) {
CommonObject* object = ptr -> getObject();
if (object) {
object -> display();
}
ptr = ptr -> getNext();
}
}
}
};
}