JPH1173305A - Screen editor having check function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of compiling to improve productivity and maintainability in software development by checking the existence of a data name that is specified by a cursor to a source program which is shown on a screen and performing error display when it does not exist. SOLUTION: A data name definition table 21 analyzes a source input at the time of inputting a source program when a check function on is and accumulates information of a definition source line number of the data name and a reference source line number as data name, status information and source line number information. A processing procedure name definition table 22 accumulates information of the definition of a processing procedure name, a source line number and a reference source line number. By checking the status information of the tables, it is decided whether the data name and the processing procedure name are normal or abnormal, and at the time of abnormality, corresponding data name and processing procedure name are displayed in color based on the source line number that is held in each table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program editing apparatus, and more particularly to a screen editor type program editing apparatus suitable for use in software development and maintenance.

[0002]

2. Description of the Related Art In a conventional screen editor,
At the time of program creation (new creation / modification), after coding is completed, it must be compiled and visually checked for errors such as data names and processing procedure names.

[0003] Further, even when the coding of another part is copied and reused by utilizing the characteristics of the editor, the data name, processing procedure name, and the like of the copied part must be visually checked and corrected. .

[0004]

As described above, the conventional editor has the following problems.

The first problem is that there is a high possibility that a data name entry error is overlooked.

The reason is that the conventional editor does not have a function for checking data name input omission and the like, and a data name input error is detected for the first time as a result of compiling a source program.

A second problem is that there is no other method than visually detecting an illegal branch from within a section or an illegal branch into a section.

The reason is that the editor does not have a function of recognizing the section range.

For example, Japanese Patent Application Laid-Open No. 3-294927 proposes a screen editor that performs a simple grammatical check on input symbol information in a program source process and gives an error instruction when a grammatical error is detected.
It simply performs a simple syntax (grammar) check on input.

Therefore, the present invention has been made in view of the above problems, and has as its object to detect input errors and omissions at the time of input of a source program and to correct them, for example, by compiling. Later debugging work,
An object of the present invention is to provide a program creating apparatus that reduces the number of compiles by focusing on debugging of logic (program logic), thereby improving productivity and maintenance of software development.

[0011]

In order to achieve the above object, a program variant device with a check function according to the present invention provides a program variant with a cursor for a source program displayed on a screen when the check function is set to ON. It is characterized in that a means is provided for checking the existence of the specified data name, and displaying an error in a different color or the like when it does not exist.

In the present invention, when the check function is set to ON, it is appropriate for the source program displayed on the screen whether the processing procedure name is a simple branch or a branch in a section. A means for checking sex.

[0013]

Embodiments of the present invention will be described below. In a preferred embodiment of the program editing apparatus of the present invention, when the check function is ON, when a source program is input (input from a keyboard, when reading from a floppy disk or a hard disk),
A data name definition table (21 in FIG. 2) for analyzing the source input and accumulating information on a definition source line number of the data name and a reference source line number of the data name as data name, status information, and source line number information; A processing procedure name definition table (22 in FIG. 2) for storing information on the definition source line number of the processing procedure name and the reference source line number of the processing procedure name as the processing procedure name, status information, and source line number information; Function and the status information of these tables are checked to determine whether the data name and processing procedure name are normal or abnormal,
When abnormal, the source line No. held in each table
It is provided with a function of displaying the corresponding data name or processing procedure name in color based on the (number).

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a diagram for explaining an outline of an embodiment of the present invention, and schematically shows a screen display output of a program editing device (editor). Referring to FIG. 1, in one embodiment of the present invention, when the check function is set to ON (see F10 check ON in FIG. 1), the existence of the data name designated by the cursor and the processing procedure name is checked.
For example, when the data name does not exist in the source program, it is displayed in a different color ("GHG4-C" in FIG. 1). Also, in one embodiment of the present invention, the validity of the processing procedure name is checked whether it is a simple branch or a branch within a section, and when an abnormality occurs, the corresponding processing procedure name is determined based on the source line No. and column position information. The name is displayed in color (if the terminal is not a color display terminal, it may be displayed by brightness inversion or the like). Data name undefined, typo,
Needless to say, different colors may be displayed in response to each error such as an error at a branch destination. The details of the editor device according to one embodiment of the present invention will be described below.

FIG. 2 is a diagram for explaining an embodiment of the present invention, and is a diagram schematically showing a table configuration. Referring to FIG. 2, a program editing apparatus (editor) according to an embodiment of the present invention includes a data name definition table 21 and a processing procedure name definition table 22 in addition to a table held by a normal screen editor. ing.

When the source program has completed inputting one line, it is determined whether the data name or the processing procedure name is the data name or the processing procedure name, and is recorded in the corresponding table.

The data name definition table 21 is divided into a data name area (which is a main key), a status information area, and a source line No. area. The source line No. area includes information on a definition source line and information on a reference source line. To accumulate.

The processing procedure name definition table 22 includes a processing procedure name area (which is a main key), a status information area, and a source line No. area.
The o area stores information on information on the definition source line (definition area) and the reference source line (reference area) (see FIG. 3). The status information area includes flags of definition, section, within section, reference, and GOTO (branch).

Each of the source line No. areas of the data name definition table 21 and the processing procedure name definition table 22 has a set of source line No. information and its data name, or the position address (column position) of the processing procedure name as information.

There is no link relationship between the data name definition table 21 and the processing procedure name definition table 22, and they exist independently. That is, when the target is determined to be a data name, processing such as reference, search, and update is performed on the data name definition table 21.

When the check function is turned on and the input of one line is completed, the data name and the processing procedure name are extracted from the input of the one line.

The extraction positions (the first column position and the last column position) become information of each definition table, and are stored. Then, it determines whether the extracted character string is a data name or a processing procedure name, and updates the corresponding definition table.

(1) Data name: The data name definition table 21 is searched using the extracted data name as a key.

When a stopper (FF... FF) is detected, it is regarded as a new data name, the extracted data name, source line No. and extraction position are added, and the status information is updated.

On the other hand, if a match is found in the data name definition table 21, it is determined from the extraction position whether or not the data is a double definition. If it is a duplicate definition, error display processing is performed. If it is not a duplicate definition (OK), information is added to the source line No area and the status information is updated.

When the last line of the program is completed,
The data name definition table 21 is searched to determine whether or not the status information is "definition status" (only the definition is made and there is no reference). As a result, if there is a status information whose definition information is “definition state” (definition flag is “1”), a warning message is displayed and output.

When the FIND instruction (search instruction) of the editor is executed, the corresponding data name is displayed in color based on the source line No. and the extraction position information with reference to the data name definition table 21.

(2) In the case of processing procedure name: As in the case of data name, the processing procedure name definition table 22 is searched using the extracted processing procedure name as a key.

If it is new, the processing procedure name, source line No., extraction position, type, and status information are updated.
On the other hand, if a match is detected, it is determined whether it is a definition or a reference. If it is a definition, it is regarded as a duplicate definition and an error is displayed. If it is referenced, it is added to the processing procedure name definition table.

When the processing procedure is a section name, it is necessary to manage source line numbers from the start of the section to ExiT. When the “ExiT instruction” or the next section name is detected, the processing procedure name definition table 22 is updated. After the update, the processing procedure name definition table 22 is searched, and if an illegal pop-up or the like is checked, an error is displayed.

When the last line of the program is completed,
The processing procedure name table 22 is searched, and the portion where the table is not determined is checked. If there is a portion where the table is not determined, an error is displayed.

Next, transition of the processing procedure name definition table will be described as a processing operation of one embodiment of the present invention with reference to FIG. FIG. 3A shows an example of a source program, and FIG. 3B shows the contents of a processing procedure name definition table.

Processing is performed line by line from the source line 11 in the example of the program shown in FIG. In the processing procedure name definition table, a table is created in the order of A → X → A1 → AExit → B1 → B.

[A SECT] on the 100th line of the program
ION. Is turned on, the section flag (see the status information in the processing procedure definition table) is turned ON.

On the next line 121, "B SECIO"
N. Is detected when the section is terminated, the processing procedure name definition table is scanned (* in FIG. 3B).
1), an undetermined address (* 2 in FIG. 3B) is determined. That is, as the definition area of the processing procedure name A, the 100th and 120th lines of the source line No (AExit)
Is determined.

Thereafter, inspection is performed from A to B,
It detects that the address of “B1” (the branch destination of the GOTO statement in the 109th line) is undetermined, and displays an error message.

Similarly, in the 131st line, “C SEC
TION. At the time of processing, the scan of * 3 in FIG. 3B is performed, and the address of * 4 in FIG. 3B is determined.

[0039]

As described above, according to the present invention,
This has the effect of improving productivity and maintainability of software development.

The reason is that, in the present invention, input errors and omissions can be detected at the source input stage in the editor device, so that debugging after compilation can be limited to logic. This is because

[Brief description of the drawings]

FIG. 1 is a diagram schematically illustrating an example of a screen display output of an editor device according to an embodiment of the present invention.

FIG. 2 is a diagram for explaining one embodiment of the present invention;
It is a figure showing an example of a table composition.

FIG. 3 is a diagram for explaining the operation of one embodiment of the present invention, and is a diagram schematically showing a transition of processing relating to a processing procedure definition table.

[Explanation of symbols]

 21 Data name definition table 22 Processing procedure name definition table

Claims (3)

[Claims] 1. When a check function is set to ON, a source program displayed on a screen is checked for the existence of a data name specified by a cursor, and does not exist (undefined), double definition, only definition. A program editing device with a check function, comprising means for displaying the data name in another color or the like to notify an error when an abnormality such as non-reference is detected. A means for checking whether a processing procedure name is a simple branch or a branch in a section with respect to a source program displayed on a screen when a check function is set to ON. A program editing device with a check function. 3. When the check function is set to ON, when a source program is input, the source input is analyzed to determine a data name, status information, a definition source line number of the data name, and a reference source line of the data name. Create a data name definition table that stores numbers, and a processing procedure name definition table that stores processing procedure names, status information, definition source line numbers of the processing procedure names, and reference source line numbers of the processing procedure names. Means for performing, the status information of the table,
It consists of flags such as definition, section, in section, reference, and GOTO (branch). By checking status information of the data name definition table and the processing procedure name definition table, the data name and the processing procedure name are determined. Means for judging whether or not the data is normal or not, and in the event of an error, a means for performing color display of a corresponding data name or processing procedure name on the screen based on the source line number held in each of the tables so that an error can be identified. A program editing device with a check function.