You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
122 lines
2.3 KiB
122 lines
2.3 KiB
// Copyright (c) 1998-1999 Microsoft Corporation
|
|
//
|
|
// alist.cpp
|
|
//
|
|
#include "alist.h"
|
|
|
|
LONG AListItem::GetCount(void) const
|
|
{
|
|
LONG l;
|
|
const AListItem *li;
|
|
|
|
for(l=0,li=this; li!=NULL ; li=li->m_pNext,++l);
|
|
return l;
|
|
}
|
|
|
|
AListItem* AListItem::Cat(AListItem *pItem)
|
|
{
|
|
AListItem *li;
|
|
|
|
if(this==NULL)
|
|
return pItem;
|
|
for(li=this ; li->m_pNext!=NULL ; li=li->m_pNext);
|
|
li->m_pNext=pItem;
|
|
return this;
|
|
}
|
|
|
|
AListItem* AListItem::Remove(AListItem *pItem)
|
|
{
|
|
AListItem *li,*prev;
|
|
|
|
//treat remove(NULL) same as item not found in list
|
|
if (pItem==NULL)
|
|
return this;
|
|
|
|
if(pItem==this)
|
|
{
|
|
li = m_pNext;
|
|
m_pNext = NULL;
|
|
return li;
|
|
}
|
|
prev=NULL;
|
|
for(li=this; li!=NULL && li!=pItem ; li=li->m_pNext)
|
|
prev=li;
|
|
if(li==NULL) // item not found in list
|
|
return this;
|
|
|
|
// here it is guaranteed that prev is non-NULL since we checked for
|
|
// that condition at the very beginning
|
|
|
|
prev->SetNext(li->m_pNext);
|
|
li->SetNext(NULL);
|
|
|
|
// SetNext on pItem to NULL
|
|
pItem->SetNext(NULL);
|
|
|
|
return this;
|
|
}
|
|
|
|
AListItem* AListItem::GetPrev(AListItem *pItem) const
|
|
{
|
|
const AListItem *li,*prev;
|
|
|
|
prev=NULL;
|
|
for(li=this ; li!=NULL && li!=pItem ; li=li->m_pNext)
|
|
prev=li;
|
|
return (AListItem*)prev;
|
|
}
|
|
|
|
AListItem * AListItem::GetItem(LONG index)
|
|
|
|
{
|
|
AListItem *scan;
|
|
for (scan = this; scan!=NULL && index; scan = scan->m_pNext)
|
|
{
|
|
index--;
|
|
}
|
|
return (scan);
|
|
}
|
|
|
|
void AList::InsertBefore(AListItem *pItem,AListItem *pInsert)
|
|
|
|
{
|
|
AListItem *prev = GetPrev(pItem);
|
|
pInsert->SetNext(pItem);
|
|
if (prev) prev->SetNext(pInsert);
|
|
else m_pHead = pInsert;
|
|
}
|
|
|
|
void AList::AddTail(AListItem *pItem)
|
|
{
|
|
if (m_pHead == NULL)
|
|
{
|
|
AddHead(pItem);
|
|
}
|
|
else
|
|
{
|
|
m_pHead = m_pHead->AddTail(pItem);
|
|
}
|
|
}
|
|
|
|
void AList::Reverse()
|
|
|
|
{
|
|
AList Temp;
|
|
AListItem *pItem;
|
|
while (pItem = RemoveHead())
|
|
{
|
|
Temp.AddHead(pItem);
|
|
}
|
|
m_pHead = Temp.GetHead();
|
|
}
|
|
|
|
BOOL AList::IsMember(AListItem *pItem)
|
|
|
|
{
|
|
AListItem *pScan = GetHead();
|
|
for (;pScan;pScan = pScan->GetNext())
|
|
{
|
|
if (pItem == pScan) return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|