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#include "StdAfx.h"
#include "CLink.h"
CLink::CLink() {
mNext = NULL;
mPrev = NULL;
}
CLink::CLink(CLink* prev) {
mNext = NULL;
mPrev = prev;
if (prev)
prev->SetNext(this);
}
/*virtual*/ CLink::~CLink() {
}
void CLink::InsertAt(CLink* before) {
if (!mNext) {
mNext = before;
if (before)
before->mPrev = this;
} else {
CLink *tmp = mNext;
mNext = before;
tmp->mPrev = before;
before->mNext = tmp;
}
}
void CLink::Remove() {
CLink *prev = mPrev;
CLink *next = mNext;
mNext = NULL;
mPrev = NULL;
if (prev)
prev->mNext = next;
if (next)
next->mPrev = prev;
}
void CLink::RemoveLink() {
Remove();
}
unsigned int CLink::Count() const {
unsigned int n = 1;
CLink *i = mNext;
while (i) {
n++;
i = i->GetNext();
}
return n;
}
CLinkIterator::CLinkIterator(CLink* start)
: mStart(start)
, mCurrent(NULL)
{
}
/*virtual*/ CLinkIterator::~CLinkIterator() {
}
BOOL CLinkIterator::Current(CLink** p) {
if (mCurrent) {
*p = mCurrent;
return true;
}
return false;
}
BOOL CLinkIterator::Prev(CLink** p) {
if (mCurrent) {
mCurrent = mCurrent->mPrev;
return Current(p);
}
return false;
}
BOOL CLinkIterator::Next(CLink** p) {
if (mCurrent) {
mCurrent = mCurrent->mNext;
return Current(p);
} else {
mCurrent = mStart;
return Current(p);
}
}
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