Object-oriented optimization code generator and a method therefor

Abstract

A code generation system is provided which optimizes a code generation for a control system applicable to an embedded control system without the need to increase its memory capacity. A total control unit 110 causes to read a model diagram and an operation diagram which depict a software specification stored in a memory 104, and starts specification analysis unit 106 to execute lexical and grammatical analyses thereof. Then, object-oriented function removing unit 107 is started to determine any function which is not used according to a function select item stored in the memory 104. Then, code generation unit 108 is started to generate a code on the basis of the result of the lexical and grammatical analyses of the software specification, and of an output code pattern determined by the object-oriented function removing unit 107.

Description

BACKGROUND OF THE INVENTION [0001] The present invention relates to an automatic software generating system, and in particular, to a software generating system for automatically generating a software from an object-oriented specification which features an improved code efficiency. [0002] A code generating system generates a software from an object-oriented software statement. Generally, a specification described by an operator is entered via an input device, then the specification is analyzed, and a program code is generated and output. [0003] However, when a code is generated simply on the basis of the specification described by the operator, there arises such a problem that a target code becomes enormously large, thereby requiring a large memory capacity therefor. [0004] In order to solve this problem associated with the conventional art, JPA Laid-Open No. 6-266562 discloses a method for reducing the size of a target code. This method includes the steps of: comparing a class name ...

AI Technical Summary

Benefits of technology

The present invention provides a code generating system that optimizes code for different applications and embedded control systems without increasing memory capacity. The system includes a specification analyzer, a function removal means, and a code generation means. The specification analyzer analyzes object-oriented specifications to derive specification information. The function removal means removes unnecessary functions from object-oriented functions based on a predetermined rule. The code generation means generates a code based on the program information produced by the function removal means. The invention eliminates the mechanism required for realizing unnecessary functions, resulting in a code with reduced memory capacity.

Problems solved by technology

However, when a code is generated simply on the basis of the specification described by the operator, there arises such a problem that a target code becomes enormously large, thereby requiring a large memory capacity therefor.

However, the conventional code generation method as described above does not take into account whatsoever anything about an object-oriented function to use for generating an object-oriented program code.

That is, when generating a code from an object-oriented specification, unnecessary codes are also generated for unused functions of the object-oriented functions.

When this conventional code generation method is applied, in particular, to a software for an embedded control system, because a resulting output code becomes enormous, a large sized unit having a large memory capacity capable of implementing the enormous code will be required, thus there is such a problem that the cost of manufacture will increase substantially.

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