clang  6.0.0svn
Public Member Functions | List of all members
clang::DeltaTree Class Reference

DeltaTree - a multiway search tree (BTree) structure with some fancy features. More...

#include "clang/Rewrite/Core/DeltaTree.h"

Public Member Functions

 DeltaTree ()
 
 DeltaTree (const DeltaTree &RHS)
 
 ~DeltaTree ()
 
int getDeltaAt (unsigned FileIndex) const
 getDeltaAt - Return the accumulated delta at the specified file offset. More...
 
void AddDelta (unsigned FileIndex, int Delta)
 AddDelta - When a change is made that shifts around the text buffer, this method is used to record that info. More...
 

Detailed Description

DeltaTree - a multiway search tree (BTree) structure with some fancy features.

B-Trees are generally more memory and cache efficient than binary trees, because they store multiple keys/values in each node. This implements a key/value mapping from index to delta, and allows fast lookup on index. However, an added (important) bonus is that it can also efficiently tell us the full accumulated delta for a specific file offset as well, without traversing the whole tree.

Definition at line 28 of file DeltaTree.h.

Constructor & Destructor Documentation

◆ DeltaTree() [1/2]

DeltaTree::DeltaTree ( )

Definition at line 387 of file DeltaTree.cpp.

◆ DeltaTree() [2/2]

DeltaTree::DeltaTree ( const DeltaTree RHS)

Definition at line 390 of file DeltaTree.cpp.

References getRoot().

◆ ~DeltaTree()

DeltaTree::~DeltaTree ( )

Definition at line 397 of file DeltaTree.cpp.

References getRoot().

Member Function Documentation

◆ AddDelta()

void DeltaTree::AddDelta ( unsigned  FileIndex,
int  Delta 
)

AddDelta - When a change is made that shifts around the text buffer, this method is used to record that info.

It inserts a delta of 'Delta' into the current DeltaTree at offset FileIndex.

Definition at line 451 of file DeltaTree.cpp.

References getRoot().

Referenced by clang::RewriteBuffer::InsertTextAfter().

◆ getDeltaAt()

int DeltaTree::getDeltaAt ( unsigned  FileIndex) const

getDeltaAt - Return the accumulated delta at the specified file offset.

This includes all insertions or delections that occurred before the specified file index.

Definition at line 404 of file DeltaTree.cpp.

References getRoot(), Node, and clang::Result.

Referenced by clang::RewriteBuffer::InsertTextAfter().


The documentation for this class was generated from the following files: