CDictionaryBasedTempPath CDictionaryBasedTempPath::ReplaceParent
( const CDictionaryBasedPath& oldParent
, const CDictionaryBasedPath& newParent) const
{
assert (oldParent.IsSameOrParentOf (*this));
// I admit, this is the most stupid implementation possible ;)
std::string newPath = newParent.GetPath()
+ GetPath().substr (oldParent.GetPath().length());
return CDictionaryBasedTempPath (GetDictionary(), newPath);
}
CDictionaryBasedTempPath CDictionaryBasedTempPath::GetCommonRoot
(const CDictionaryBasedTempPath& rhs) const
{
// short-cut: different base directories anyway?
if (rhs.GetIndex() != GetIndex())
return CDictionaryBasedTempPath (inherited::GetCommonRoot (rhs));
// match relative paths
typedef std::vector<std::string>::const_iterator IT;
IT begin = relPathElements.begin();
IT end = relPathElements.end();
IT iter = begin;
IT rhsEnd = relPathElements.end();
IT rhsIter = relPathElements.begin();
while ((iter != end) && (rhsIter != rhsEnd) && (*iter == *rhsIter))
{
++iter;
++rhsIter;
}
// construct the result
CDictionaryBasedTempPath result (GetBasePath());
result.relPathElements.insert (result.relPathElements.begin(), begin, iter);
// update the debug-only _path member
#ifdef _DEBUG
result._path = result.GetPath();
#endif
return result;
}
void CSearchPathTree::Link (CSearchPathTree* newParent)
{
assert (parent == NULL);
assert (newParent != NULL);
// ensure that for every cached path element hierarchy level
// there is a node in the tree hierarchy
index_t pathID = path.GetBasePath().GetIndex();
index_t parentPathID = path.IsFullyCachedPath()
? path.GetDictionary()->GetParent (pathID)
: pathID;
if (newParent->path.GetBasePath().GetIndex() < parentPathID)
{
CDictionaryBasedPath parentPath ( path.GetDictionary()
, parentPathID);
newParent = new CSearchPathTree ( CDictionaryBasedTempPath (parentPath)
, (revision_t)NO_REVISION
, newParent);
}
parent = newParent;
// insert into parent's child list ordered by pathID
// O(1) insertion in most cases
if (parent->firstChild == NULL)
{
// no child yet
parent->firstChild = this;
parent->lastChild = this;
}
else if (parent->lastChild->path.GetBasePath().GetIndex() <= pathID)
{
// insert at the end
previous = parent->lastChild;
parent->lastChild = this;
previous->next = this;
}
else if (parent->firstChild->path.GetBasePath().GetIndex() >= pathID)
{
// insert at the beginning
next = parent->firstChild;
parent->firstChild = this;
next->previous = this;
}
else
{
assert (parent->firstChild != parent->lastChild);
// scan for insertion position
CSearchPathTree* node = parent->firstChild;
while (node->path.GetBasePath().GetIndex() < pathID)
node = node->next;
// insert us there
previous = node->previous;
next = node;
previous->next = this;
node->previous = this;
}
}