139 lines
2.5 KiB
C++
139 lines
2.5 KiB
C++
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//---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1996 - 1997
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//
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// File: sdict.cxx
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//
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// Contents: simple dictionary
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//
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// History: 28-Feb-97 SophiaC Created.
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//
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//----------------------------------------------------------------------------
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#include <iis.hxx>
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SIMPLE_DICT::SIMPLE_DICT()
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{
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cDictSize = 0;
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iNextItem = 0;
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cDictSlots = INITIALDICTSLOTS;
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DictSlots = InitialDictSlots;
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memset(DictSlots, 0, sizeof(void *) * cDictSlots);
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}
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SIMPLE_DICT::~SIMPLE_DICT()
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{
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if (DictSlots != InitialDictSlots)
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delete DictSlots;
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}
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int
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SIMPLE_DICT::Insert (
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void *Item
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)
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{
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int iDictSlots;
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void * * NewDictSlots;
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for (iDictSlots = 0; iDictSlots < cDictSlots; iDictSlots++)
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if (DictSlots[iDictSlots] == NULL)
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{
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DictSlots[iDictSlots] = Item;
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cDictSize += 1;
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return(iDictSlots);
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}
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// If we fell through to here, it must mean that the dictionary is
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// full; hence we need to allocate more space and copy the old
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// dictionary into it.
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NewDictSlots = (void * *) new char[sizeof(void *)*cDictSlots*2];
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if (!NewDictSlots)
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return(-1);
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memcpy(NewDictSlots, DictSlots, sizeof(void *) * cDictSlots);
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memset(NewDictSlots+iDictSlots, 0, sizeof(void *) * cDictSlots);
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if (DictSlots != InitialDictSlots)
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delete DictSlots;
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DictSlots = NewDictSlots;
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cDictSlots *= 2;
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DictSlots[iDictSlots] = Item;
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cDictSize += 1;
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return(iDictSlots);
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}
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void *
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SIMPLE_DICT::Find (
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int Key
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)
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{
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if (Key >= cDictSlots)
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return(NULL);
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return(DictSlots[Key]);
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}
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void *
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SIMPLE_DICT::DeleteItemByBruteForce(
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void * Item
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)
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{
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if (Item == 0)
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{
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return (0);
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}
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for (int i = 0; i < cDictSlots; i++)
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{
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if (DictSlots[i] == Item)
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{
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DictSlots[i] = NULL;
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cDictSize -= 1;
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return (Item);
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}
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}
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return (0);
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}
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void *
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SIMPLE_DICT::Delete (
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int Key
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)
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{
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void *Item;
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if (Key >= cDictSlots)
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{
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return(NULL);
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}
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Item = DictSlots[Key];
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ASSERT((DictSlots[Key]));
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cDictSize -= 1;
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DictSlots[Key] = NULL;
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return(Item);
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}
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void *
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SIMPLE_DICT::Next (
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)
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{
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for ( ; iNextItem < cDictSlots; iNextItem++)
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{
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if (DictSlots[iNextItem])
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return(DictSlots[iNextItem++]);
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}
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iNextItem = NULL;
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return(NULL);
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}
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