JPS61211737A - Program comparison deciding method - Google Patents

Abstract

PURPOSE:To automatically identify a changing section by providing a comparison deciding reference based on a coincidence of continuing plural lines, extracting the same section in order from a section having many continuous and coincident lines while reducing gradually the number of the lines, and deciding a remaining line to be a correcting line of an addition, a deletion and a replacement. CONSTITUTION:New and old source programs 1, 2 are loaded in new and old source program storing tables 5, 6 and a numerical value is set as a continuous and coincident line number N of a comparison deciding reference. Then, the new and old source program storing tables are compared and scanned and a continuous and coincident section above the N line is extracted. When there is the section of the continuous and coincident section more than the N lines, a flag indicating the coincidence is set in a comparison result area of the new and old source program storing tables 5, 6. In the case where an object to be compared is not present, the value of N is subtracted by one and when N is <=0, referring to the comparison result area, a comparison result is outputted to a printer 7 and printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to printing changed portions of old and new source programs when changing source programs, and particularly relates to a method for comparing and determining programs suitable for determining whether the same portions and changed portions are the same. .

[Background of the invention]

The conventional source program change check is based on Japanese Patent Laid-Open No. 57-
Although there is a check when editing a source program as shown in Japanese Patent No. 123448, this method cannot be used for the final check after multiple changes have been made. An effective way to check whether a new source program that has undergone multiple changes has been changed correctly is to check the changes against the results of comparing the old and new source programs.

However, as shown in Figure 1, although the actual change in the comparison judgment result of the old and new source programs is the deletion of the part α, there is a problem that depending on the method of comparison judgment, the comparison result and the changed part do not match. Ta.

[Purpose of the invention]

An object of the present invention has been made to solve the above problems.When arbitrary changes are made to a general source program that has multiple lines with exactly the same content, the changed parts are recorded before and after the change. An object of the present invention is to provide a program comparison and judgment method that automatically identifies programs by comparing old and new source programs.

[Summary of the invention]

In Figure 1, when comparing the old and new source programs,
The difference between the comparison result and the changed part is the Do statement or END.
This is due to the fact that there are multiple lines with exactly the same content, such as sentences, and the correspondence between them is not taken into account. Therefore, the present invention solves the above problem by determining the sameness in descending order of consecutive matching parts. That is, as shown in FIG. 2, in the comparison and determination, first the part b where nine consecutive lines match is determined to be the same, and then the part C where one row matches is determined to be the same. Then, it is determined that the remaining mismatched portion d has been deleted from the correspondence between the old and new source programs.

Therefore, the present invention provides a method for comparing and determining an old source program before modification and a new source program after modification, and printing the determination result. It is characterized by sequentially decreasing the number of reference lines and extracting the same parts in order from the part with the largest number of consecutive matching lines, and determining the remaining parts as modified lines for addition, deletion, or replacement.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings. Fig. 3 is a block diagram showing the configuration of a computer system to which the present invention is applied, Fig. 4 is a flowchart showing the comparison processing procedure, and Fig. 5 is a diagram showing a storage area table for storing old and new source programs and judgment results. It is.

In FIG. 3, 1 and 2 are external storage devices for storing old and new source programs, 3 is a central processing unit, 4 is a comparison processing block, and 5 and 6 are storage devices for storing old and new source programs and judgment results for processing in the comparison processing block. Table 7 is a printer device that prints the comparison results.

Next, the comparison processing procedure will be described using the flowchart of FIG. First, the new and old source programs 1.2 are loaded into the new and old source program storage tables 5 and 6, and a numerical value of 16 is set as the number N of consecutive matching lines, which is a comparison criterion (step 8). Next, the old and new source program storage tables are compared and scanned, and consecutive matching parts of N or more lines are extracted (Step 9).
. If there are consecutive matching parts in N or more lines, a flag indicating that there is a match is added to the old and new source program storage table 5. Set in the comparison result area 12 of Party B (step 10). If comparison targets remain, return to step 9; if there are no comparison targets, subtract 1 from the value of N (step 11).
.

If N is not 0 or less, the process returns to step 9, and if N is 0 or less, the comparison result area 12 is referred to and the comparison result is output to the printer device 7 and printed.

〔Effect of the invention〕

As explained above, according to the present invention, when an arbitrary change is made to a source program that has multiple lines with exactly the same content, the changed part is automatically identified by comparing the old and new source programs before and after the change. The effect of being able to do this is obtained.

[Brief explanation of drawings]

Fig. 1 is a diagram for explaining the problems of the comparison method, Fig. 2 is an explanatory diagram showing an example of comparison and judgment according to the present invention. The figure is a flowchart of the comparison criteria of this example.
The figure shows the format of a table used in this embodiment. α... Source program changed part (deletion) N... Number of consecutive matching lines of comparison criteria 1... New source program storage external storage device 2... Old source program storage external storage device 3... Central processing unit 7 ...Printer device. Atsushi 1 Figure λ Figure 3 Figure O6 Figure 4 Atsushi 5

Claims (1)

[Claims] 1. In a method of comparing and judging the old source program before modification and the new source program after modification, and printing the result, a comparison criterion is established based on the match of multiple consecutive lines, and the line of the comparison criterion is A program comparison and determination method is characterized in that the same portions are extracted in order from the portion with the largest number of consecutive matching lines while decreasing the number sequentially, and the remaining portions are determined to be modified lines for addition, deletion, or replacement.