JPH04195559A - Subfile management system - Google Patents

Abstract

PURPOSE:To efficiently delete a subfile by changing a subfile name to be deleted at the time of receiving a deleting request for a prescribed subfile in a file and setting up the subfile as a deletable subfile. CONSTITUTION:In the case of deleting subfiles S1 to Sn, the subfile names of these subfiles are converted by a subfile delete enabling means 12 based upon a prescribed format, the subfiles to be deleted from the file 3 are set up as deletable files and the deletable files retrieved by a deletable file retrieving means 21 are collectively erased by a subfile deleting means 22. Unerased deleting subfiles can be restored to normal subfiles by correcting their subfile names by a proper means. On the other hand, the subfile names of the deletable subfiles are changed. Consequently, the subfiles in the file 3 can be efficiently deleted and the misreference of the deleted subfiles can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a subfile management method in a computer system, and can be used, for example, to manage programs made up of a plurality of modules.

[Prior Art] Conventionally, when handling a file etc. consisting of a large number of subfiles, it is necessary to search for and read the necessary subfiles, as well as to appropriately delete subfiles that are no longer needed within the file. .

When deleting such subfiles, the method of deleting subfiles one by one as in normal file deletion is also adopted, but empty space cleaning (garbage collection) etc. is used for each deletion process. In addition to taking a long time to process, there was a problem in that it was impossible to restore subfiles that were carelessly deleted due to an erroneous operation or the like.

For this reason, a two-step deletion method using a deletion flag is adopted to delete subfiles. In this two-step deletion method, the first step is to set the deletion flag of the subfile you want to delete within the file, and the second step is to
Delete all subfiles with deletion flags in the file at once. Therefore, in such a two-step deletion method, empty space cleaning following deletion can be done only once, making the deletion process short, and the deletion flag can be reset before the second stage. This allows subfiles to be restored.

[Problem to be solved by the invention]

By the way, in the two-step deletion method described above, the subfile whose deletion flag was set in the first step will have its subfile name registered as is in the management area, etc., unless deletion processing is performed in the second step. ing. Therefore, in the case of a method in which a subfile is accessed only by the subfile name, there is a problem that even a subfile that is treated as deleted may be referenced carelessly.

An object of the present invention is to provide a subfile management method that can efficiently delete subfiles within a file and prevent erroneous references to deleted subfiles.

[Means for Solving the Problems] The present invention provides subfile deletion means for changing the name of a subfile to be deleted when a deletion request is made for a predetermined subfile in a file, and making the subfile a deleted subfile. , a subfile management method is configured, comprising a deleted subfile search means for searching for deleted subfiles, and a subfile deletion means for deleting deleted subfiles searched by the deleted subfile search means. It is something.

[Effect]

In the present invention configured as described above, when deleting a subfile, the subfile name is changed in a predetermined format by the subfile deletion means, the file to be deleted in the file is set as a deleted file, and the subfile is deleted. The deleted subfiles searched by the subfile search means are collectively deleted by the subfile deletion means, thereby realizing efficient subfile deletion processing. Further, the deleted subfile before deletion can be restored as a normal subfile by correcting the subfile name by appropriate means. On the other hand, since the subfile name of the deleted subfile has been changed, erroneous searches for deleted subfiles are prevented even in systems that search for subfile names, thereby achieving the above objective.

〔Example〕

Hereinafter, the configuration of the present invention will be explained in detail with reference to the drawings.

Referring to FIG. 1, one embodiment of the present invention is a subfile S
1 manages file 3 including S, , subfile deletion process 1 that deletes subfiles in file 3, and subfile deletion process that actually deletes the deleted subfiles. Processing 2 is provided.

The subfile deletion process 1 includes a subfile search means 11 that searches the file 3 for a subfile that corresponds to the input subfile name, and changes the subfile name of the searched subfile and deletes it. The subfile deletion means 12 is also provided.

Here, the subfile search means 11 is configured to return to inputting the subfile name and not perform processing by the subfile deletion means 12 if the corresponding subfile name is not found as a result of the search. .

Further, the subfile deletion means 12 is configured to replace, for example, the first character of the searched subfile name with a character of a predetermined deletion code.

Note that the deletion code is preferably a character other than those used in normal subfile names, and for example, a blank (space) is used.

The subfile deletion process 2 includes a deletion subfile search means 21 that searches for a deleted subfile having the above-mentioned deletion code at the beginning of the subfile name from within the file 3, and actually deletes the searched deleted subfile. The subfile deletion means 22 is also provided.

Here, the deleted subfile search means 21 is configured so that the subfile deletion means 22 does not perform the process unless the corresponding deleted subfile is found as a result of the search.

In this embodiment configured as described above, the following operations are performed.

In addition, FIG. 2(A) and FIG. 2(B) show the processing contents of subfile deletion processing 1 and subfile deletion processing 2, respectively, and Plol to P2O in each figure
3 shows each step of the flowchart.

To delete a subfile, first, subfile deletion processing 1 is activated. In the activated subfile deletion process 1, the subfile search means 11 inputs the name of the subfile to be deleted as shown in FIG. 2(A) (PIOI).

Here, when a command to end a predetermined process is input in Plol, subfile deletion process 1 is ended (P
1O2). On the other hand, when a subfile name is input in Plol, subfile deletion processing 1 searches for a subfile corresponding to this subfile name (PtO2) and checks whether this subfile exists (P1O4).

If there is a corresponding subfile, the subfile deletion means 12 deletes it (P1O5), and if there are still subfiles to be deleted in file 3,
Repeat the process from subfile master power to deletion of subfiles Plot~P105), enter the deletion code in the necessary subfile names, and make these subfiles deleted subfiles.

Next, subfile deletion processing 2 is started.

In the activated subfile deletion process 2, the process shown in FIG. 2(B)
As shown in FIG.
2O1). At this time, first check whether there are any deleted files in file 3 (P2O2), and if there are no deleted files, the process ends. On the other hand, if there are deleted files, the subfile deletion means 22 deletes the deleted subfiles all at once from within the file 3 (P2O3).

According to this embodiment, the following effects can be obtained.

That is, processing efficiency can be improved by two-stage deletion, ie, deletion by subfile deletion process 1 and actual deletion by subfile deletion process 2.

For example, cleaning up the free space in file 3 only needs to be done - times after the subfile deletion process, which can shorten the processing time.

Furthermore, since the deleted subfile has its subfile name changed and cannot be referenced by its original subfile name, erroneous references to the deleted subfile can be prevented.

In this way, since the subfile name is changed and the subfile is deleted, there is no need to separately set a deletion flag in the subfile management information area, and it is easier to implement than the conventional two-step deletion method. , and widely applicable.

On the other hand, the subfile deleted in subfile deletion process 1 can be restored as appropriate before subfile deletion process 2 is executed.
Even if you make a mistake in inputting information and delete it, you can easily correct it.
It is possible to improve the efficiency of the restoration work and improve the efficiency of the entire processing work.

Note that such restoration processing can be done by replacing the deletion code character (space in the above example) written at the beginning of the subfile name with another character, such as "A". It can be easily achieved,
Deleted subfiles can be easily restored.

Note that the present invention is not limited to the above-described embodiments, but also includes the following modifications.

That is, in the above embodiment, the first character of the subfile name is deleted by replacing it with a deletion code, but characters in other positions may also be replaced, and two or more characters,
Alternatively, the entire subfile name may be replaced.

In addition, instead of predetermining a certain code as the deletion code, for example, by performing a numerical operation such as adding or subtracting a certain value to the character code that makes up the subfile name, the character code can be changed to a hidden character code. When restoring, it is also possible to completely restore the original file name by performing calculations in the opposite direction.

In short, the subfile deletion means 12 changes the subfile name of the subfile to be deleted, and at that time, it is possible to prevent reference by the subfile name and to determine that it has been deleted. Any configuration that performs character code conversion or the like may be used.

〔Effect of the invention〕

As described above, according to the subfile management method of the present invention, subfiles within a file can be deleted efficiently, and erroneous references to deleted subfiles can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
Figures (A) and (B) are flowcharts showing the operations in the embodiment, respectively. 1... Subfile deletion processing, 2... Subfile deletion processing, 3... File, 11... Subfile search means, 12... Subfile deletion means, 21
. . . Deleted subfile search means, 22 . . . Subfile deletion means, S1 to S, . . . Subfile.

Claims (1)

[Claims] (1) In a subfile management method that manages subfiles included in a file used in a computer system, when a request is made to delete a predetermined subfile within a file, the name of the subfile to be deleted is changed and the subfile is deleted. a subfile deletion means for deleting a deleted subfile, a deleted subfile search means for searching for a deleted subfile, and a subfile deletion means for deleting the deleted subfile searched by the deleted subfile search means. A subfile management method characterized by comprising: