JPH02280240A - File processing system for program - Google Patents

Abstract

PURPOSE:To obtain a necessary result in a shorter time by providing a means to change an output destination to an external storage device in a degree sufficient for storing an output file based on the change definition information of the external storage device. CONSTITUTION:Not only when a file to be prepared can be stored in the specific external storage device to be output-designated by a user but also when the file cannot be stored, change definition information 502 of the external storage device designated by the user is read. When the external storage device in the degree sufficient for storing an output file 703 based on the change definition information 502 of the external storage device exists, the output destination can be changed from the specific external storage device to be output-designated by the user into the other external storage device. Thus, without generating the suspension of the processing due to the size shortage of the external storage device, a main body processing can be executed, and the necessary result is obtained in the shorter time.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a file processing method for a program that inputs a file and outputs a file to an external storage device [Prior Art] In a conventional file processing method for a program, 7th
As shown in the figure, a program 702 having a function of inputting an input file 701 and outputting an output file 703 is taken as an example. Here, the output files also include temporary files that are generated during program processing and are deleted when the program processing ends.

As shown in FIG. 8, a host machine 801 on which a program 702 runs includes an input/output device 802 that receives and receives user commands, and an arithmetic device 80 that processes the main body of the program.
3. It has an external storage device 804 that stores files.

As shown in FIG. 2, the program 702 includes a departure and departure analysis section 1oo that analyzes the file name and parameters specified at the time of program startup, a file input section 105 that inputs an input file, and a main body section that performs the main processing of the program. 106, an output file generation section 107 that generates a file based on main processing, and a termination processing section 108.

In the conventional file processing method of the program, the file input section 10 immediately after the processing of the departure and departure analysis section 100 is completed.
5, the input file was read and the processing by each of the processing units was performed.

[Problem to be solved by the invention]

Assuming that the host machine on which the program runs is, for example, a personal computer, external storage devices for storing output files include floppy disk devices, small-capacity hard disk devices, memory disk devices, and the like. The size of these external storage devices is approximately IM bytes for a floppy disk device, approximately several megabytes for a memory disk device, and approximately several tens of megabytes for a small capacity hard disk device. Therefore, depending on the state of the external storage device before the program is executed, the free size of the external storage device that can be used when the program is executed is often several hundred bytes or less.

On the other hand, the size of a program's output file can range from a few bytes to hundreds of bytes.

Therefore, during program processing, the external storage device becomes full while outputting the output file to the external storage device.
There were cases where program processing could not be continued.

Normally, it takes from several minutes to several tens of minutes from the start to the end of program processing, depending on the size of the output file.

In conventional program file processing methods, program processing continues until the external storage device is full and then execution is stopped, which occupies the host machine for that time, and the user has to run the program again. The disadvantage is that the process is redundant, and the processing performed before the program stops execution becomes meaningless, resulting in the user not being able to obtain the results he or she wants within the planned time, which reduces development efficiency. The disadvantage was that it decreased.

[Means to solve the problem]

The file processing method of the program of the present invention includes a means (103) for predicting the size of the generated file, a means (104) for reading the remaining capacity of the external storage device, and a means for predicting the size of the generated file. Read the remaining amount.
means (109) for comparing information obtained from
), and means (112>) for changing the output destination to an external storage device sufficient to store the output file based on change definition information of the external storage device.

[Effect]

Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 1 is a flowchart showing the processing procedure of the present invention.

First, the starting line analysis section analyzes the starting line and obtains an input file name (step 100). Next, perform initial settings for reading change definition information from the external storage device (step 101).
For example, the location where the change definition information exists in the external storage device is set, and preparations are made for reading the change definition information from the external storage device.

Next, the size of the input file is read from the input file name via the operating system on the host machine (step 102).

Next, based on the size of the input file, a predicted size of the output file to be generated is calculated by an output file size predicted value calculation unit (step 103), the size of the input file used in the calculation. To determine the function between the size of the output file and the size of the generated output file, first input multiple input files to a program using the conventional file processing method and measure the size of each generated output file. This is statistically derived from the relationship between the input file size and the output file size.

Since this function is unique to each program, the function obtained will be specifically explained using a file converter as an example of the program.

Here, we will use 20 different input files as an example to obtain the function. These 20 input files are input to the file converter, and the size of the output files is shown in FIG.

A graph of FIG. 9, in which these 20 input files are input to the file converter, and the size of the input file (hereinafter referred to as X) and the size of the generated file (hereinafter referred to as y) are calculated. The function is shown in FIG.

In this case, assuming that it can be approximated by the -order number and applying the least squares method, 3
/=3.4x+Q, 9. Assuming that the size of the output file predicted by the function that calculates the predicted size of the output file to be generated is larger than the size of the file actually generated by the 20 input files, the function calculates the size using the least squares method. Change the intercept of the interval number upwards,
As shown in line segment 1o02 in Figure 10, y=3.4x+
It becomes 4.4. This is the function to be sought in this example.

After predicting the size of the output file using the above function, the free size of the external storage device that can be used by the user before program execution is read out via the operating system on the host machine. step 104). Here, let A be the external storage device used by the user.

Then, the predicted value of the generated output file is compared with the free size of the external storage device A, and it is determined whether the output file can be stored in the external storage device A (
Step 109). If the free size of external storage device A exceeds the expected value of the output file to be generated (
Step 109 - In the case of Yes), it is determined that storage is possible, and conversely, if the free size of the external storage device A does not exceed the predicted value of the output file to be generated (
Step 109 - In the case of No), it is determined that the data cannot be stored.

If the output file can be stored in the external storage device A based on the result of the determination, (step 109 - Yes) the input file is input as usual (step 105).
), the input file is analyzed by the main unit in step 10.
6), generate an output file (step 107), perform termination processing (step 108), and terminate the program.

However, if the output file cannot be stored in the external storage device A (step 109 - No), the change definition information section of the external storage device is read (step 110).
. Next, it is determined whether change definition information for the external storage device exists (step 111).

For example, if change definition information B of the external storage device exists (step 111 - Yes), step 11
Step 2 changes the external storage device from A to B.

Next, preparations are made to read the change definition information from the next external storage device (step 113).

After that, the free size of the external storage device B is read (step 104), the predicted value of the output file is compared with the remaining amount (step 109), and the free size of the external storage device is used to predict the output file to be generated. If it exceeds the value (step 109 - Yes), it is determined that the input file can be stored, and the input file is input.Step 105
), program processing continues normally. If storage is not possible (step 109 - No), read the change definition information section of the external storage device (step 110).
).

If the external storage device change definition information does not exist (step 111 - No), the program is terminated without inputting the input file (step 108).
.

〔Example〕

FIG. 3 is a flowchart showing the processing of the program of the first embodiment using the present invention. Here, a specific explanation will be given using FIG. 3.

In the first embodiment, it is assumed that change definition information of an external storage device is stored in a file with a specific name.For example, file 5 in FIG. 5 stores change definition information of an external storage device.
01 (B is stored as change definition information 502 in the external storage device in the file name INFO.

First, the starting line analysis section analyzes the starting line and obtains an input file name (step 100). Next, the file 501 that stores change definition information in the external storage device is opened and the file pointer is set at the beginning of the file 501 (step 301).

Next, as explained in step 102 of FIG. 1, the size of the input file is read from the input file name via the operating system on the host machine (step 102).

Next, based on the size of the input file, the predicted size of the output file to be generated is calculated by the predicted output file size calculation section (step 103). Next, the free size of the external storage device available to the user before program execution is read out via the operating system on the host machine (step 104). Let be A.

Then, the predicted value of the generated output file is compared with the free size of the external storage device A, and it is determined whether the output file can be stored in the external storage device A (
Step 109) If the free size of the external storage device A exceeds the predicted value of the output file to be generated (
Step 109 - In the case of Yes), it is determined that storage is possible, and conversely, if the free size of the external storage device A does not exceed the predicted value of the output file to be generated (
Step 109 - In the case of No), it is determined that the data cannot be stored.

If the output file can be stored in the external storage device A based on the result of the determination, (step 109 - Yes) the input file is input as usual (step 105).
), the input file is analyzed by the main unit in step 10.
6), generate an output file (step 107), perform termination processing (step 108), and terminate the program.

However, if the output file cannot be stored in the external storage device A (step 109-N).

), the contents of the area that stores the change definition information 502 of the external storage device are read from the file 501 that stores the change definition information of the external storage device (step 110). Next, if the change definition information of the external storage device exists, It is determined whether or not to do so (step 111).

In this case, since the content B of the area storing the change definition information 502 in the external storage device exists (Step 111-Ye
s), change the external storage device from A to B.

Next, in step 112, the file pointer of the file 501 storing change definition information in the external storage device is shifted by the amount read (step 313).

After that, the free size of the external storage device B is read (step 104), the predicted value of the output file is compared with the remaining amount (step 109), and the free size of the external storage device is used to predict the output file to be generated. If it exceeds the value (step 109 - Yes), it is determined that the input file can be stored, and the input file is input.
5) Allow program processing to continue normally. However, if it is not possible to store the change definition information 502 (step 109 - No), the contents of the area storing the change definition information 502 in the external storage device are read again from the area storing the change definition information 502 in the external storage device (step 110).

If the file pointer reaches the end of the file as a result of reading the contents of the area that stores the change definition information 502 in the external storage device (step 111 - No), the program ends processing without inputting the input file. (step 108).

FIG. 4 is a flowchart showing the processing of a program according to a second embodiment of the present invention. In the first embodiment, change definition information in the external storage device is stored in a file with a specific name, whereas in this embodiment, it is specified in an input line that specifies command activation. As a result, in the first embodiment, the user had to store the change definition information in the external storage device in a fixed file, but in this embodiment, it is specified in the input line that specifies command startup. This saves the effort of changing the file contents every time the change definition information in the external storage device is changed.

For example, if the change definition information of the external storage device specified for the departure line is BC, as shown in FIG. The change definition information 603 (B) of the external storage device is stored in the memory address x+1, the change definition information 604 (C) of the external storage device is stored in the memory address x+2, and the change definition information 60 of the external storage device is stored in the memory address x+2.
Stores O indicating that the specification of 5 has been completed. In addition, in Figure 6, the change definition information of the external storage device is
Counter area 6
Store in 06.

First, the starting line analysis section analyzes the starting line and obtains an input file name (step 100). Next, the change definition information of the external storage device specified in the starting line is written in the memory, and 1 (contents of the counter area 607) indicating the change definition information of the first external storage device is assigned to the counter area 606 (step 401).

Next, as already explained in the first embodiment, the size of the input file is read from the input file name via the operating system on the host machine (step 102).

Next, based on the size of the input file, the predicted output file size calculation unit calculates the predicted size of the output file to be generated (step 103). Next, the free size of the external storage device available to the user before program execution is read out via the operating system on the host machine (step 104). Here, let A be the external storage device used by the user.

Then, the predicted value of the generated output file is compared with the free size of the external storage device A, and it is determined whether the output file can be stored in the external storage device A (
Step 109). If the free size of the external storage device A exceeds the predicted value of the output file to be generated (step 109 - Yes), it is determined that storage is possible, and conversely, the free size of the external storage device A is does not exceed the predicted value of the output file to be generated (step 109 - No), it is determined that the file cannot be stored.

If the result of the determination indicates that the output file can be stored in the external storage device A (step 109 - Yes), input the input file as usual.Step 105
), the input file is analyzed by the main unit in step 10.
6), generate an output file (step 107), perform termination processing (step 108), and terminate the program.

However, if the output file cannot be stored in the external storage device A (step 109 - No), the first file (content 607) which is the content of the counter area 606 from the memory 601 that stores change definition information of the external storage device Step 110: Read change definition information from the external storage device.
), that is, read out the change definition information 603 of the external storage device at the memory address X. Next, the counter area 60
It is determined whether the change definition information of the first external storage device, which is the content 607 of step 6, exists (step 111
), that is, it is determined whether change definition information 603 of the external storage device at memory address X exists.

In this case, the change definition information 603 of the first external storage device, which is the contents 607 of the counter area 606, is not 0 (
Step 111 - If Yes), therefore, change the external storage device from A to B.

Next, the value incremented by 1 is stored in the counter area 606 (step 413), that is, the content of the counter area 606 becomes 2.

After that, the free size of the external storage device B is read (step 104), the predicted value of the output file is compared with the remaining amount (step 109), and the free size of the external storage device is used to predict the output file to be generated. If it exceeds the value (step 109 - Yes), it is determined that the input file can be stored, and the input file is input.Step 105
), allowing program processing to continue normally. However, if the storage is not possible (step 109 - No), the change definition information of the second external storage device, which is the content 607 of the counter area 606, is read out again from the memory 601 that stores the change definition information of the external storage device (step 109). 110),
That is, the change definition information 604 of the external storage device at memory address x+1 is read.

In this case, the change definition information 604 of the second external storage device, which is the content 607 of the counter area 606, is not O (
Step 111 - If Yes), therefore, Step 1
Step 12 changes the external storage device from B to C.

Next, the value incremented by 1 is stored in the counter area (step 606) (step 413), that is,
The content of the counter area 606 becomes 3.

After that, the free size of the external storage device C is read out (Step 104), the predicted value of the output file is compared with the remaining amount (Step 109), and the free size of the external storage device is used to predict the output file to be generated. If it exceeds the value (step 109 - Yes), it is determined that the input file can be stored, and the input file is input.Step 105
), allowing program processing to continue normally. However, if the storage is not possible (step 109 - No), read out the change definition information of the third external storage device, which is the content 607 of the counter area 606, again from the memory 601 that stores the change definition information of the external storage device. 110),
That is, the change definition information 605 of the external storage device at memory address x+2 is read.

The result of reading the change definition information of the third external storage device is 0, which indicates that the specification of the change definition information of the external storage device has been completed, and since the change definition information of the external storage device does not exist (step 111-NO). ), the program is terminated without inputting the input file (step 108).

[Effects of the Invention] As explained above, in the program using the file processing method of the present invention, the generated file can be stored not only in a specific external storage device specified by the user for output, but also in cases where it cannot be stored. Even if possible, if sufficient external storage exists to read the change definition information of the external storage specified by the user and store the output file based on the change definition information of the external storage, By being able to change the output destination from a specific external storage device designated by the user for output to another external storage device, main body processing can be performed without interrupting processing due to insufficient size of the external storage device.

This has the following effects.

(1) If the output destination external storage device has the necessary free space, the program does not need to be re-executed, thereby eliminating the need for double effort and allowing the required results to be obtained in a shorter time.

(2) If the output destination external storage device does not have the necessary free space, the process will end before the main processing begins.
The host machine, which was traditionally occupied until processing was terminated, can now be used for another purpose.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a processing section of a program using the file processing method of the present invention, Fig. 2 is a block diagram of a processing section of a conventional program, and Fig. 3 is a file processing scheme of the first embodiment of the present invention. Fig. 4 is a block diagram of a processing unit of a program using the file processing method of the second embodiment of the present invention, and Fig. 5 is a block diagram of a processing unit of a program using the file processing method of the second embodiment of the invention. Figure 6 is a configuration diagram of the memory that stores change definition information in the external storage device, Figure 7 is a configuration diagram of files handled by the program, and Figure 8 is a configuration diagram of the host machine on which the program runs. , Figure 9 is a relationship diagram between input file size and output file size, Figure 10
The figure is a relationship diagram (graph) between input file size and output file size. 100... Attendance line analysis unit, 101... Initial setting unit for reading external storage device change definition information, 102... Input file size reading unit, 103... Output file size prediction value calculation unit, 104... Remaining capacity calculation unit of external storage device, 105... File input unit, 106
... Main body part, 107... Output file generation part, 10
8... Termination processing unit, 109... Determining unit whether storage is possible in external storage device, 110... Reading change definition information section of external storage device, 111... Change definition of external storage device Determining unit whether information exists or not, 112... External storage device changing unit, 113... Read preparation unit for next external storage device change definition information unit, 301... Opening the file and changing the file pointer. Set at the beginning, 313...
Shift the file pointer by the amount read, 401...
Write change definition information of the external storage device to memory and assign 1 to the counter area, 413... Count up the counter area by 1, 501... File storing change definition information of the external storage device, 502... Change definition information of external storage device, 601...Memory for storing change definition information of external storage device, 602...Address of memory,
603... Change definition information of external storage device, 604...
- External storage device change definition information, 605... External storage device change definition information, 606... Counter area, 60
7...Contents of the counter area.

Claims (1)

[Claims] means for predicting the size of the generated file; means for reading the remaining capacity of the external storage device; and means for comparing information obtained from the means for predicting the size of the generated file and the means for reading the remaining capacity. and means for reading out the change definition information part of the external storage device, and means for changing the output destination to an external storage device designated as the change definition information of the external storage device, If it is determined that the file size exceeds the remaining capacity of the external storage device, the change definition information of the external storage device is read by the means for reading the change definition information section of the external storage device, and is specified as the change definition information of the external storage device. A file processing method for a program characterized in that the output destination is changed by means of changing the output destination to an external storage device.