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#include <charPipeline/structures/Tree.h>
void DSExtractBranch(DSTreePtr tree, Ptr obj) {
DSBranchPtr branch = (DSBranchPtr)(obj + tree->Offset);
Ptr cursor = branch->Children;
Ptr next;
while (cursor) {
next = ((DSBranchPtr)(cursor + tree->Offset))->Next;
DSInsertBranchBelow(tree, branch->Parent, cursor);
cursor = next;
}
DSRemoveBranch(tree, obj);
}
void DSInitTree(DSTreePtr tree, Ptr obj, DSBranchPtr branch) {
tree->Root = NULL;
tree->Offset = (Ptr)branch - obj;
}
void DSInsertBranchBelow(DSTreePtr tree, Ptr cursor, Ptr obj) {
DSBranchPtr branch;
DSBranchPtr objBranch = (DSBranchPtr)(obj + tree->Offset);
Ptr tail = NULL;
if (cursor) {
branch = (DSBranchPtr)(cursor + tree->Offset);
if (branch->Children) {
tail = branch->Children;
} else {
branch->Children = obj;
}
} else if (tree->Root) {
tail = tree->Root;
} else {
tree->Root = obj;
}
if (tail) {
while (((DSBranchPtr)(tail + tree->Offset))->Next) {
tail = ((DSBranchPtr)(tail + tree->Offset))->Next;
}
((DSBranchPtr)(tail + tree->Offset))->Next = obj;
objBranch->Prev = tail;
} else {
objBranch->Prev = NULL;
}
objBranch->Next = NULL;
objBranch->Parent = cursor;
}
void DSInsertBranchBeside(DSTreePtr tree, Ptr cursor, Ptr obj) {
DSBranchPtr parent;
DSBranchPtr branch;
branch = (DSBranchPtr)(obj + tree->Offset);
if (!cursor) {
if (!tree->Root) {
tree->Root = obj;
branch->Next = NULL;
branch->Prev = NULL;
branch->Children = NULL;
branch->Parent = NULL;
return;
}
cursor = tree->Root;
}
while (((DSBranchPtr)(cursor + tree->Offset))->Next) {
cursor = ((DSBranchPtr)(cursor + tree->Offset))->Next;
}
parent = (DSBranchPtr)(cursor + tree->Offset);
parent->Next = obj;
branch->Prev = cursor;
branch->Next = NULL;
branch->Parent = parent->Parent;
}
void DSRemoveBranch(DSTreePtr tree, Ptr obj) {
DSBranchPtr branch;
DSBranchPtr parent;
branch = (DSBranchPtr)(obj + tree->Offset);
if (branch->Parent) {
parent = (DSBranchPtr)(branch->Parent + tree->Offset);
if (parent->Children == obj) {
parent->Children = branch->Next;
}
} else if (tree->Root == obj) {
tree->Root = branch->Next;
}
if (branch->Prev) {
((DSBranchPtr)(branch->Prev + tree->Offset))->Next = branch->Next;
}
if (branch->Next) {
((DSBranchPtr)(branch->Next + tree->Offset))->Prev = branch->Prev;
}
branch->Prev = NULL;
branch->Next = NULL;
branch->Parent = NULL;
}
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