Undo/redo algorithm for a computer program

Details Undo/redo algorithm for a computer program Undo/redo algorithm for a computer program

2006-02-21

2006-02-21

Bonzo, Bryce P. (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C715S252000

Reexamination Certificate

active

07003695

ABSTRACT:
A method of tracking modifications of specific program objects during the runtime of a computer program, facilitates the creation of general UnDo and ReDo operations, as well as the support of an object-specific UnDo operation. When an object is modified, the object is interrogated to collect information about it and how the modification may be undone. The collected information is stored in a highly unbalanced data-tree structure. Since the interrogation of an object is a characteristic of the programming language, and not necessarily a modification of the program being executed, the present method may be easily applied to different existing programs with minimal, if any, modification to the existing programs.

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