JPH0594351A - System for changing updated date information for node - Google Patents

Abstract

PURPOSE:To easily search an update file using the update date information by transmitting the change of the update date information of a file node to the host directory node. CONSTITUTION:A file node update date information change means 1 updates the update date information in a file node information table 4 to the date of updating point, and passes the control to a host node information table retrieval means 2. The host node information table retrieval means 2 retrieves a directory node information table 5 of a host directory node based on the host node information in the file node information table 4 and the directory node information table 5. A directory node update date information change means 3 refers to the update flag in the retrieved directory node information table 5 and changes the update date information to the date of the update point if it is effective, then passes the control to the host node information table retrieval means 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a node update date / time information changing method, and more particularly to a node update date / time information changing method in a file management system for managing a plurality of files as a tree structure of file nodes and directory nodes.

[0002]

2. Description of the Related Art FIG. 5 is a diagram showing a typical tree-structured directory / file structure. In Figure 5, ROOT
Is the root directory node, d ₁₁ , d ₂₁ , d ₂₂ , d ₃₁
Indicates a directory node, and f ₂₁ , f ₂₂ , f ₃₁ , f ₃₂ indicate file nodes, respectively. Root directory ROO
T and directory nodes d ₁₁ , d ₂₁ , d ₂₂ , d
_The subordinate node ₃₁ has a subordinate node name and information indicating the storage location of the node, for example, a node number, as subordinate node information. For example, the directory node d ₁₁ in FIG. 5 has lower node information as shown in FIG.

In the conventional node update date / time information changing method, when a file is updated (created, changed, etc.), the date / time when the file is updated is set as it is in the update date / time information of the corresponding file node. Was only.

[0004]

In this conventional method for changing the update date / time information of a node, when the file is updated, only the date / time when the file is updated is set in the update date / time information of the file node. Therefore, as a result of dividing a large-scale program into smaller manageable units in actual software development, the file management system for storing files has a wide variety of directories and files. However, there is a problem that in order to find the changed file from among these, it is necessary to search the files one by one for each layer.

Further, in order to obtain the target file (for example, object file), the existence of all the files (for example, header file, source file, etc.) that depend on the creation of the target file is confirmed, and the update date and time information of the target file and Even if you use a tool that provides only the minimum required operations on the updated file after updating the target file by comparing it with the modified date information of each file,
In order to find the updated file, it is necessary to refer to the update date / time information of all the files under the directory that has not been updated at all, so that there is a disadvantage that there are many unnecessary searches.

In view of the above points, an object of the present invention is to provide an update flag in the directory node information table, and when the file is updated, follow the update flag to propagate the change of update date / time information to the upper directory node. By doing so, the update date / time information of all the nodes included in the path from the specified top-level directory node to the updated file node is changed, and the updated file can be easily found using the update date / time information. It is to provide a method for changing the update date / time information of a node that enables the above.

[0007]

SUMMARY OF THE INVENTION According to a node update date / time information changing method of the present invention, in a file management system for managing a plurality of files as a tree structure of file nodes and directory nodes, update date / time information, upper node information and A file node information table including information about data, a directory node information table including update date / time information, upper node information, update flag, and lower node information, and update time information in the file node information table when a file is updated File node update date / time information changing means for changing the date and time to and passing control to the upper node information table searching means, and the directory of the upper directory node based on the upper node information in the file node information table and the directory node information table. Refer to the upper node information table search means for searching the node information table and the update flag in the directory node information table searched by this upper node information table search means, and if it is a valid value, update date and time information is updated Directory node update date and time information changing means for changing the date and time and passing control to the upper node information table searching means.

[0008]

In the node update date / time information changing method of the present invention,
The file node information table includes update date / time information, upper node information, and information about data, and the directory node information table includes update date / time information, upper node information,
Including the update flag and lower node information, the file node update date and time information changing means changes the update date and time information in the file node information table to the date and time at the time of update when the file is updated, and passes control to the upper node information table search means, The node information table searching means searches the directory node information table of the upper directory node based on the upper node information in the file node information table and the directory node information table, and the directory node update date / time information changing means uses the upper node information table searching means. By referring to the update flag in the searched directory node information table, if it is a valid value, the update date and time information is changed to the date and time at the time of update, and control is passed to the upper node information table search means.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the structure of a node update date / time information changing system according to an embodiment of the present invention.
The node update date / time information changing method according to the present embodiment includes a file node update date / time information changing unit 1, an upper node information table searching unit 2, a directory node update date / time information changing unit 3, a file node information table 4, and a directory. The node information table 5 and its main components are configured.

Referring to FIG. 2, the file node information table 4 includes update date / time information, upper node information, upper update flag, and data-related information.

Similarly, referring to FIG. 2, the directory node information table 5 includes update date / time information, upper node information, update flag, and lower node information.

Referring to FIG. 3, the process of the node update date / time information changing method according to the present embodiment includes a file node update date / time information changing step 301, an upper update flag validity determining step 302, and an upper directory node information table searching step. 303 and update flag validity determination step 3
04 and a directory node update date / time information changing step 305.

FIG. 4 is a diagram showing an example of a directory / file structure in software development. In FIG.
ROOT is a root directory node, MOD-A, M
OD-B, SUB-a, SUB-b, SUB-c, H,
SRC and OBJ are directory nodes, h _{1 to} h _n , O
Shows _{1 ~O n,} S ₁ ~S _n is a file node, respectively. Further, it is assumed that valid values are set in the upper update flag and the update flag of the file node information table 4 and the directory node information table 5 of the directory node and the file node surrounded by the dotted line.

Next, the operation of the update date / time information changing method of the node of this embodiment having the above configuration will be described.

When a file is updated, the file node update date / time information changing means 1 changes the update date / time information in the file node information table 4 of the file node to the date / time of the update point (step 301), and the file node By referring to the upper update flag in the information table 4, it is determined whether the value is valid (whether the update date / time information of the upper directory node is changed) (step 30).
2). If the upper update flag is not a valid value, the file node update date / time information changing means 1 immediately terminates the processing, and if the upper update flag is a valid value, it passes control to the upper node information table searching means 2. The upper update flag and step 302 are provided in order to omit the unnecessary search of the upper directory node information table 5 when it is not necessary to change the update date / time information in the upper directory node information table 5. And it is not absolutely necessary.

The upper node information table retrieval means 2 retrieves the upper directory node information table 5 based on the upper node information in the file node information table 4 (or directory node information table 5) (step 303).

Next, the directory node update date / time information changing means 3 refers to the update flag in the directory node information table 5 searched by the upper node information table searching means 2 and determines whether or not the value is valid (corresponding directory). It is determined whether or not the update date / time information of the node is changed) (step 304). If the update flag is not a valid value, the directory node update date / time information changing unit 3
Immediately terminates the process and, if the update flag is a valid value, changes the update date and time information in the directory node information table 5 to the date and time at the time of update (step 305) and controls the upper node information table search means 2. (Pass control back to step 303).

By carrying out such control, in FIG. 4, when the file of the file node S ₁ under the directory node SUB-a is updated, the file node S ₁ → directory node SRC → directory node SUB-a → The update date / time information is changed in the order of the directory node MOD-A toward the upper node side.

[0020]

As described above, the present invention is provided with the file node information table, the directory node information table, the field update date / time information changing means, the upper node information table searching means, and the directory node update date / time information changing means. , When the file is updated, the update date / time information of all nodes included in the path from the specified top-level directory node to the updated file node is changed. By sequentially comparing the update date / time information of the subordinate nodes and tracing the subordinate nodes whose update date / time information has been changed, it is possible to easily find the updated file.

Further, regarding the files updated by confirming the existence of all the files which depend on the creation of the target file to obtain the target file and comparing the update date / time information of the target file with the update date / time information of each file. If you use a tool that provides only the minimum required operations, you do not have to refer to the modified date information of the file under the directory that has not been updated at all to find the updated file. This has the effect of eliminating unnecessary searches.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an update date / time information changing method of a node according to an exemplary embodiment of the present invention.

FIG. 2 is a diagram exemplifying contents of a file node information table and a directory node information table in FIG.

FIG. 3 is a flowchart showing a process of a node update date / time information changing method according to the present embodiment.

FIG. 4 is a diagram illustrating a directory / file configuration to which a node update date / time information changing method according to the present embodiment is applied.

FIG. 5 is a diagram exemplifying a general tree-structured directory / file structure.

6 is a diagram showing an example of lower node information held by the directory node shown in FIG.

[Explanation of symbols]

1 File node update date / time information changing means 2 Upper node information table searching means 3 Directory node update date / time information changing means 4 File node information table 5 Directory node information table h _{1 to} h _n File nodes MOD-A, MOD-B, SUB- a, SUB-b, S
UB-c, H, SRC, OBJ directory node O ₁ ~ O _n file node ROOT root directory node S ₁ to S _n file node

Claims (1)

[Claims] 1. In a file management system for managing a plurality of files as a tree structure of file nodes and directory nodes, a file node information table including update date / time information, upper node information, and information about data, update date / time information, upper layer A directory node information table including node information, an update flag, and lower node information, and when the file is updated, the update date and time information in the file node information table is changed to the date and time at the time of update, and control is passed to the upper node information table search means described later. File node update date / time information changing means, and an upper node information table check for searching the directory node information table of the upper directory node based on the upper node information in the file node information table and the directory node information table Means and the update flag in the directory node information table searched by the upper node information table searching means, and if the value is a valid value, the update date / time information is changed to the date and time at the time of update A method for changing the update date / time information of a node, which comprises a directory node update date / time information changing means for transferring control to the node.