本文整理汇总了C++中Link::Prev方法的典型用法代码示例。如果您正苦于以下问题：C++ Link::Prev方法的具体用法？C++ Link::Prev怎么用？C++ Link::Prev使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Link的用法示例。
在下文中一共展示了Link::Prev方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
Link * Linked_List::Find(unsigned long ID)
{
Link *lcur;
Link *l;
Link *tampoo;
#ifdef DEBUGEMB
lFindDebugEmbCount++;
#endif
// optimized by Emb 26 to 28/6/95 (sections optimize 1 and 2)
// re-optimized by Emb 23/8/95 (other sections)
// optimize 1: manage several calls on the same item
if (lastfound)
lcur = lastfound;
else
lcur = first;
if (!lcur)
return lcur; // otherwise GPF on next line
if (lcur->Item()==ID)
return lcur;
// optimize 1 bis 23/8/95 : manage "before the last" found
if (beforelastfound)
if (beforelastfound->Item()==ID) {
// swap parties
tampoo = beforelastfound;
beforelastfound = lastfound;
lastfound = tampoo;
return lastfound;
}
// optimize 2: scan linked list from lastfound,
// then only if not found, scan from lastfound until beginning
if (lastfound)
lcur = lastfound;
else {
lcur = first;
if (lcur->Item()==ID) {
beforelastfound = lastfound;
lastfound = lcur;
return lcur;
}
}
// --- TRIAL : forward from beforelastfound
// MASQUED - NOT SIGNIFICANT ENOUGH ( gain 11" on 1'31")
// if (beforelastfound)
// lcur = beforelastfound;
// else {
// lcur = first;
// if (lcur->Item()==ID) {
// beforelastfound = lastfound;
// lastfound = lcur;
// return lcur;
// }
// }
// --- TRIAL : forward from beforelastfound
// forward, from lastfound
l = lcur;
#ifdef DEBUGEMB
for (l=l->Next(); l; l=l->Next(), lNextDebugEmbCount++)
#else
for (l=l->Next(); l; l=l->Next())
#endif
if (l->Item()==ID) {
beforelastfound = lastfound;
lastfound = l;
return l;
}
// backwards, from lastfound
l = lcur;
#ifdef DEBUGEMB
for (l=l->Prev(); l; l=l->Prev(), lNextDebugEmbCount++)
#else
for (l=l->Prev(); l; l=l->Prev())
#endif
if (l->Item()==ID) {
beforelastfound = lastfound;
lastfound = l;
return l;
}
return 0;
// original code, masqued :
//for (Link *l=first; l; l=l->Next())
// if (l->Item()==ID)
// return l;
//return 0;
}示例2: Find
Link * Linked_List::Add(unsigned long ID,unsigned long parentID,char *pStr, void * lpItemData,unsigned long uiInsertAfter,unsigned long uiInsertBefore)
{
Link * insertAfter=last;
Link * insertBefore=0;
Link * parent=0;
if (uiInsertAfter)
{
Link *l =Find(uiInsertAfter);
if (l)
insertAfter=l;
}
if (parentID)
{
if (lastparent && lastparent->Item()==parentID)
{
parent=insertAfter=lastparent;
}
else
{
// Emb 28/6/95 : performance improvement using Find()
Link * l = Find(parentID);
if (l)
parent=lastparent=insertAfter=l;
// original code, masqued :
//for (Link *l=first; l && !parent;l=l->Next())
// {
// if (l->Item()==parentID)
// {
// parent=lastparent=insertAfter=l;
// }
// }
}
if (parent)
{
if (!parent->hasChild)
{
uiInsertAfter=parent->Item();
parent->hasChild=1;
}
int lev=parent->Level()+1;
for (Link *l2=parent->Next();l2;l2=l2->Next())
{
if (l2->Parent()!=parent && l2->Level()<=lev)
break;
insertAfter=l2;
if (uiInsertAfter && l2->Item()==uiInsertAfter)
break;
}
}
else
{
//for (LinkNonResolved *l =firstNonResolved;l && l->Next(); l= (LinkNonResolved *) l->Next());
LinkNonResolved *ll =new LinkNonResolved(ID,firstNonResolved,pStr,parentID,lpItemData);
if (ll && !firstNonResolved)
firstNonResolved=ll;
return 0;
}
}
if (bSort && !uiInsertAfter && pStr)
{
for (Link *l = parent ? parent->Next():first ; l && !insertBefore; l=l->Next())
{
if ((l->Parent()==parent) && IsBefore(pStr,l->String()))
{
insertBefore=l;
}
}
}
if (uiInsertBefore)
{
Link *l =Find(uiInsertBefore);
if (l && ((parent==l) || (parent==l->Parent())))
{
insertBefore=l;
}
}
Link *l =new Link(ID,parent,insertAfter,insertBefore,pStr,lpItemData);
if (l)
{
count++;
current=l;
if (!l->Prev())
first=l;
if (!l->Next())
last=l;
if (insertBefore && insertBefore==first)
first=l;
if (firstNonResolved)
ResolveLink(ID);
}
return l;
}