JPH06236263A - Data structure extending system for cobol program - Google Patents

Abstract

(57) [Summary] [Object] The present invention provides a general-purpose program structure description format that can be commonly used in various analysis processes for application programs described in the COBOL language. The purpose is to reduce the development load of analysis tools. [Configuration] According to the present invention, a lexical analysis unit 1 and a syntax analysis unit 2 are provided.
A data item analysis unit 3 for analyzing the reference and update relations in the command sentence of the data item from the processing result of the syntax analysis unit 2 for the instruction definition part in the application program; and the data item analysis unit 3 The data flow table creation processing unit 4 creates the data flow table 10 in which the reference and update relationship of the data item name in the above statement is expanded based on the data structure configured by the table based on the information obtained by the analysis processing of FIG. Consists of.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a preprocessing of various analysis processes for an application program for reconstructing, redesigning, reusing parts, and maintaining an existing application program written in the COBOL language. , A data structure expansion method for structuring and expanding the data flow of an application program.

[0002]

2. Description of the Related Art When reconstructing, redesigning, reusing parts, and maintaining application programs, necessary analysis processing is performed using various analysis tools corresponding to each processing. Do.

Conventionally, in this type of analysis tool, a data structure that can be commonly used among the tools has not been established.
The program structure was described in its own format. Therefore, when the analysis processing of the application program is performed, the analysis processing and the expansion processing,
It was necessary to develop the deployment format from the beginning, and there was a drawback in that a great load was applied both in terms of time and labor.

Further, even in the case of utilizing the existing analysis result for an application program for which similar analysis processing has already been performed, the description format of the analysis tool in which the description of the program structure is also utilized However, there is a drawback that the versatility is lost.

The present invention is intended for application programs written in the COBOL language, solves the above-mentioned conventional problems, and provides a general-purpose program structure description format that can be commonly used in various analysis processes. However, the challenge is to reduce the development load of various analysis tools.

[0006]

In order to achieve the above object, the present invention provides a data structure expansion method for a COBOL program, which expands a source program of an application program described in the COBOL language based on a data structure. A lexical analysis unit that decomposes a source program of an application program written in the COBOL language into lexical units; a parsing unit that parses the lexical sequence obtained by the lexical analysis process of the lexical analysis unit; From the result of the syntactic analysis process of the syntactic analysis unit, the data item analysis unit that analyzes the reference and update relationship in the instruction sentence of the data item for the instruction definition portion in the application program, and the data item analysis unit Based on the information obtained in the analysis process, referencing the data item name in the above statement and Be made of the data flow table creating unit for creating data flow table developed based on configured data structure of the new relationship in the table and said.

In such a data structure expansion method, the data flow table indicates the reference or update relation of the data item name by the command statement in the application program and the data in which the defined position of the command statement in the program is registered. It is characterized by comprising a table and a search table showing a relationship between a data item name indicating a reference or update relationship by the data table and a command statement referring to or updating the data item name.

[0008]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a data structure expanding method of a COBOL program according to an embodiment of the present invention.

In the data structure expanding method of the COBOL program of this embodiment, the source program of the application program described in the COBOL language is input, the data structure expanding process is performed, and the data flow table 1 is executed.
Expand to 0. The created table is stored in a predetermined storage device (not shown).

Here, the data flow table 10 is a data table 1 which indicates a reference or update relationship of a data item name by a command statement in an application program and a definition position of the command statement in the program is registered.
1 and a search table 12 showing the relationship between the data item name indicating the reference or update relationship by the data table 11 and the command statement referring to or updating the data item name. FIG. 9 shows an example of the data flow table 10. Further, FIG. 10 shows a source program written in the COBOL language of the application program expanded in the data flow table 10 shown in FIG.

As shown in FIG. 1, the data structure expansion processing according to the present embodiment is obtained by a lexical analysis unit 1 for decomposing an input source program into lexical phrases which are basic elements in syntax, and analysis by the lexical analysis unit 1. A syntax analysis unit 2 that performs syntax analysis on the obtained lexical string, and a data item analysis unit 3 that analyzes the relationship between data items based on the analysis result of the syntax analysis unit 2.
And the data flow table creation unit 4 that creates the data flow table 10 based on the information obtained by the analysis processing of the data item analysis unit 3.

FIG. 2 shows a flow of the data structure expansion processing. First, when the lexical analysis unit 1 inputs a file of a source program of an application program, the input source program is decomposed into lexical parts (step S).
1). Then, the syntactic analysis unit 2 performs syntactic analysis on the lexical string, processes syntactic errors, and identifies the type and structure of the imperative sentence (step S2).

Next, the data item analysis unit 3 sequentially inspects the imperative sentence from the lexical string subjected to the syntactic analysis process by the syntactic analysis unit 2 to determine whether the data item in the imperative sentence has a reference relation or an update relation. It is detected and data item information is created (step S3).

Next, the data flow table creating section 4
Based on the data item information obtained by the analysis processing of the data item analysis unit 3, a data flow table is created by expanding the reference and update relationship of the data item name in the above statement based on the data structure composed of a table. (Step S4).

The above processes are repeated until all the command statements in the input program file are processed (step S5).

As shown in FIG. 3, the data item analysis unit 3 identifies the reference data item in the command statement of the input file from the other data item names by the reference data item identifying means 31.
And update data item identifying means 32 for identifying the update data item in the same statement from other data item names. As a result, data item information including the presence or absence of the reference data item and the update data item in the command statement and the physically defined position in the application program of each command statement having these data items is created. here,
The reference data item refers to the data item name referred to in the command statement, and the update data item refers to the data item name updated in the command statement.

FIG. 4 shows a processing flow of the data item analysis unit 3. When the data item analysis unit 3 inputs the lexical string of the source program for which the syntax analysis has been performed, first, the reference data item identifying means 31 inserts it into the command sentence based on the information obtained by the lexical analysis process and the syntax analysis process. Determine whether there is a reference data item (step S
1). If there is a reference data item, the reference data item in the command statement is added to the data item information (step S2). This identification process is repeated until there is no reference data item in the statement.

Next, the update data item identification means 32 determines whether or not there is an update data item in the command statement based on the information obtained by the lexical analysis process and the syntax analysis process (step S3). If there is an update data item, the update data item in the command statement is added to the data item information (step S4). This identification process is
Repeat until there are no updated data items in the statement.

After the above identification processing, the data item analysis unit 3
Detects the defined position of the identified command statement in the application program and adds it to the data item information (step S5). The data item information including the data item name identified by each of the above processes and its definition position is stored in a working memory or the like.

As shown in FIG. 5, the data flow table creating section 4 includes a table area securing means 41 for securing an area for storing a table in a storage area of a storage device, and a data item created by the data item analyzing section 3. It is composed of reading means 42 for reading information and registration means 43 for registering the predetermined information read by the reading means 42 in the area secured by the table area securing means 41.

FIG. 6 shows a processing flow of the data flow table creating section 4. When the data item analyzing unit 3 creates the data item information, the data flow table creating unit 4 causes the table area securing unit 41 to create the data table 11 and the search table 12 in the storage area of the storage device.
Area is secured (step S1).

Next, the data item information is read by the reading means 42, and the information such as the definition position of the command statement in the program and whether the data item is referenced or updated is registered by the registration means 43 for each command statement. Is registered in the data table 11 (step S2).

Next, the data flow table creating section 4
The registration means 43 registers in the search table 12 a reference pointer indicating the registration position in the data table 11 of the data item registered in the data table 11 in step S2 (step S3). With this reference pointer
In the search table 12, the relationship between the reference data item or the update data item and the command statement that refers to or updates these data item names can be shown. That is, by using the data item name as a key and calculating the registration position in the search table 12 by the reference pointer, the relationship between the data item name and the command statement is represented.

The above processing by the data flow table creating section 4 is repeated while the reference data item or the update data item identified by the data item analyzing section 3 remains in the data item information. Then, the process ends when there is no reference data item or update data item (step S4).

[0025]

As described above, according to the present invention, the COBO
Since the source program of the application program written in the L language is expanded in the data flow table, the structure of the application program can be described in general, and the reference or update relation of the data item name is shown. By being able to show the relationship between the data item name that indicates the reference or update relationship and the statement that references or updates the data item name,
There is an effect that data exchange between various analysis tools and development of a new analysis tool are facilitated, and time and labor load can be reduced.

Further, by adopting the data flow table as a means for describing the program structure of the application program, the reference or update relationship of the data item name is traced when the data flow is analyzed for the flow of processing at the time of program analysis. There is an effect that it is possible to easily search for a corresponding statement by paying attention to the data item name.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a data structure expansion method of a COBOL program according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing flow of the data structure expansion method of FIG.

FIG. 3 is a functional block diagram showing functions of a data item analysis unit in FIG.

FIG. 4 is a flowchart showing a processing flow of a data item analysis unit in FIG.

5 is a functional block diagram showing functions of a data flow table creation unit in FIG. 1. FIG.

FIG. 6 is a flowchart showing a processing flow of a data flow table creation unit in FIG.

FIG. 7 is a diagram showing an example of a data flow table.

FIG. 8 is a diagram showing an example of a source program of an application program described in COBOL language.

[Explanation of symbols]

 1 lexical analysis unit 2 syntax analysis unit 3 data structure analysis unit 4 data flow table creation unit 10 data flow table 11 data table 12 search table

Claims (2)

[Claims] 1. A data structure expansion method of a COBOL program for expanding a source program of an application program described in the COBOL language based on a data structure, wherein the source program of the application program described in the COBOL language is used as a token. From the lexical analysis unit to be decomposed, the syntactic analysis unit that parses the lexical sequence obtained by the lexical analysis process of the lexical analysis unit, and the result of the syntactic analysis process of the syntactic analysis unit, from the application program Targeting the instruction definition part of
A table of data item name reference and update relationships in the above statement, based on the data item analysis unit that analyzes the reference and update relationships of data items in the command statement, and the information obtained by the analysis processing of the above data item analysis unit. And a data flow table creation processing unit that creates a data flow table expanded based on a data structure composed of
Program data structure expansion method. 2. A data table in which a data flow table indicates a reference or update relationship of a data item name by a command statement in an application program and a definition position of the command statement in the program is registered, and the data table. 2. The COBOL program according to claim 1, comprising a search table showing a relationship between a data item name indicating a reference or update relationship by a table and a command statement referring to or updating the data item name. Data structure expansion method.