Exemple #1
0
        private void SetValueInTable(object key, object value, HashSlot[] table)
        {
            int size  = table.Length;
            int hash  = base.GetHash(key);
            int index = GetIndexFromHash(hash, size);

            bool success = false;

            for (int i = 0; i < size; i++)
            {
                index = GetNextQuadraticIndex(index, i, size);
                if (table[index] == null)
                {
                    table[index] = new HashSlot(key, value);
                    success      = true;
                    break;
                }
                else if (table[index].Key == key)
                {
                    table[index] = new HashSlot(key, value);
                    success      = true;
                    break;
                }
            }

            if (!success)
            {
                throw new Exception("_INTERNAL_EXCEPTION > QPHashTable > 'SetValueInTable()' :: loop ends, value not inserted");
            }
        }
        private void SetValueInTable(object key, object value, HashSlot[] targetTable)
        {
            int capacity = targetTable.Length;
            int hash     = base.GetHash(key);
            int index    = GetIndexFromHash(hash, targetTable.Length);

            bool success = false;

            for (int i = 0; i < capacity; i++)
            {
                if (targetTable[index] == null)
                {
                    targetTable[index] = new HashSlot(key, value);
                    success            = true;
                    break;
                }
                else if (targetTable[index].Key == key)
                {
                    targetTable[index] = new HashSlot(key, value);
                    success            = true;
                    break;
                }
                else
                {
                    index = (index + 1) % capacity;
                }
            }

            if (!success)
            {
                throw new Exception("INTERNAL_ERROR: SetValueInTable() :: Cannot find valid index, loop ends.");
            }
        }
Exemple #3
0
        private void ResizeTableIfNeed()
        {
            if (GetLoadFactor().Factor > MAX_LOAD_FACTOR)
            {
                int        newSize  = this.table.Length * 2;
                HashSlot[] newTable = new HashSlot[newSize];

                Rehash(this.table, newTable);

                this.table = newTable;
            }
        }
        private bool SetValueInTable(object key, object value, ListNode[] table)
        {
            int  hash         = base.GetHash(key);
            int  index        = GetIndexFromHash(hash, table.Length);
            bool sameKeyFound = false;

            HashSlot newSlot = new HashSlot(key, value);

            ListNode lastNode = table[index];

            if (lastNode != null)
            {
                bool search = true;
                while (search)
                {
                    if (lastNode.Slot.Key == key)
                    {
                        sameKeyFound = true;
                        search       = false;
                    }
                    else
                    {
                        if (lastNode.NextNode != null)
                        {
                            lastNode = lastNode.NextNode;
                        }
                        else
                        {
                            search = false;
                        }
                    }
                }
            }

            if (sameKeyFound)
            {
                lastNode.SetHashSlot(newSlot);
            }
            else
            {
                if (lastNode == null)
                {
                    table[index] = new ListNode(newSlot);
                }
                else
                {
                    lastNode.SetNextNode(new ListNode(newSlot));
                }
            }

            return(!sameKeyFound);
        }
Exemple #5
0
        private void ExtendTableIfNeed()
        {
            double factor = GetLoadFactor().Factor;

            if (factor > MAX_LOAD_FACTOR)
            {
                int        newSize  = this.table.Length * 2;
                HashSlot[] newTable = new HashSlot[newSize];

                RehashTable(this.table, newTable);

                this.table = newTable;
            }
        }
Exemple #6
0
        private bool SetValueInTable(object key, object value, HashSlot[] table)
        {
            int  hash = base.GetHash(key);
            int  size = table.Length;
            int  index;
            bool success     = false;
            bool insertedNew = false;

            for (int i = 0; i < size; i++)
            {
                index = GetNextDoubleHashIndex(hash, i, size);

                if (table[index] == null)
                {
                    table[index] = new HashSlot(key, value);
                    success      = true;
                    insertedNew  = true;

                    break;
                }
                else if (table[index].Key == key)
                {
                    table[index] = new HashSlot(key, value);
                    insertedNew  = false;
                    success      = true;

                    break;
                }
            }

            if (!success)
            {
                throw new Exception("__INTERNAL_ERROR > DHHashTable > SetValueInTable :: value not inserted, loops end");
            }

            return(insertedNew);
        }