JPH03292531A - Back-up device for development of program - Google Patents

Abstract

PURPOSE:To easily recognize a control program by extracting a judging sentence out of a program in order to decode a conditional sentence and at the same time extracting a control sentence corresponding to the decoded conditional sentence for output of the control sentence with correspondence secured to the conditional sentence. CONSTITUTION:A judging sentence extracting means 101 is provided together with a conditional sentence decoding means 102 which decodes a conditional sentence based on the extracting result of the means 101, a control sentence extracting means 103 which extracts a control sentence corresponding to the decoded conditional sentence, and an output means 104 which outputs the extracted control sentence with correspondence secured to the conditional sentence. That is, the judging sentence is extracted for 'if', 'then', 'else', etc., and a conditional sentence is decoded. Then a control sentence corresponding to the decoded conditional sentence is extracted. Both the conditional and control sentences are outputted to a CRT, etc., with correspondence secured between them. Thus the contents of a program described in a high-level language like a C language, etc., can be outputted in an easier-to-understand way.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a development support device used for program development for a control microprocessor.

B. Prior Art When high-speed operation is required, such as in the electronic control of an automobile engine, the source program is often written in a high-level language such as assembly language or C language. In a control program written in such a high-level language, judgment statements are determined from descriptions of if, then, else, etc. defined in the programming language, and the control content written by a combination of these is deciphered. There is a need.

FIG. 3 schematically shows a part of the engine electronic control program list, and the following control contents are described in this program list.

■[If the water temperature TW is less than 25°C] (conditional sentence a).

"Perform processing control A" (control statement b).

■ "If the water temperature TW is less than 25° C. and less than 300 seconds after the starter is turned on" (conditional statement C), "perform the process control B" (control statement d).

■ "If the water temperature TW is less than 25° C. and 300 seconds or more after the starter is turned on" (conditional statement e), "perform process control C" (control statement f).

C9 Problems to be Solved by the Invention However, even with a control program having as many steps as shown in FIG. 3, it is difficult to decipher the conditional statement e.
If the hierarchical structure is more than this, it will take time for not only a third party but even the creator to decipher the contents, leading to problems such as poor debugging efficiency, poor reusability, and poor propagation.

An object of the present invention is to provide a program development support device that can output the contents of a program written in a high-level language such as the C language in a more understandable manner.

To explain the present invention in conjunction with FIG. 1, which is a claim correspondence diagram, the present invention provides a development support device for creating a program including judgment statements, nine conditional statements, and control statements. applied,
The above-mentioned problem lies in the judgment sentence extraction means 10 for extracting judgment sentences.
1, a conditional sentence decoding means 102 for decoding a conditional sentence from this extraction result, a control sentence extraction means 103 for extracting a control sentence corresponding to the decoded conditional sentence, and a conditional sentence decoding means 103 for associating the extracted control sentence with the conditional sentence. This can be solved by providing an output means 104 for outputting the output.

80 actions Extract judgment sentences such as if, then, else and decipher conditional sentences. Furthermore, a control statement corresponding to the decoded conditional statement is extracted, and the conditional statement and control statement are associated with each other and output to a CRT or the like.

F. Embodiment FIG. 2 shows a schematic configuration of a program development support device according to the present invention. 1 is an input device such as a keyboard or mouse for inputting commands, etc., 2 is a display device such as a CRT that displays input characters, and 3 is a database such as a list of correspondence between conditional statements and control statements. 4 is an internal storage device that stores database creation or search programs, and 5 is a control device that controls them.

Here, the program list shown in FIG. 3 will be explained. The conditions, control contents, etc. described in this program list are stored in the external storage device 3 as a database in the form of a list shown in FIG.

Internal memory! ! 4 stores programs shown in FIGS. 5 and 6 which will be described later, and the database shown in FIG. 4 stored in the external storage device 3 is created according to these programs. Furthermore, the database is searched according to the program shown in FIG.

FIG. 5 shows a program that extracts a judgment statement from a control program, associates a conditional statement with a control statement, and displays, registers, or replaces the result.

First, when step SIO is executed, judgment statements are extracted from the read control program, conditional statements are deciphered, and control statements are extracted. This detailed program is shown in FIG.

Here the program is #if"else"tt(II, 4
1) It is assumed that the algorithm consists of two conditional statements and a control statement, and this algorithm searches after the function name, and the program reads "if" else "(71%)" for each two conditional statements and control statement. There is.

First, in step 5101, a variable i indicating the depth of the hierarchy is
Initialize by assigning 1 to (i=1 is the level of control statements that are executed unconditionally). Then, in step 5102, "
If it is determined that it is "(", the process proceeds to step 8108. In step 3108, 1 is assigned to the flag K(i) for each layer, and again in step 510.
Return to 2.

If step 5102 is negative, the process proceeds to step 5103, where it is determined whether or not []f''.

If it is determined that it is ".rif", the process advances to step 5109. In step 5109, i+1 is inserted into i. That is, the hierarchy is made deeper, the conditional statement after if is stored in array C(i), and the process returns to step 5102.

If step 5103 is negative, the process proceeds to step 5104, where it is determined whether or not re l s eJ, and re
If it is determined that it is lseJ, the process proceeds to step S110D. In the subroutine 511o, i=i+1 is inserted, the negative statement of C(i) is stored in the array C(i), and the process returns to step 5102.

If step 5104 is negative, the process proceeds to step 5105 to determine whether it is ")". If it is determined to be ")", the process proceeds to step 8106, and if negative, the process proceeds to step 5111.

Here, negation in step 5102, negation in step 5103, negation in step 5104, negation in step 5105.Since the conditional statement exists after rifJ, the statement of the program being imported is a control statement6.
In step 5111, the value of variable i is assigned to variable n,
After storing "unconditional" in the memory S and initializing the memory S, the process advances to step 5112.

In step 5112, it is determined whether n=1. If step 5112 is negative, proceed to step 5113;
In memory S, "the conditions previously stored in S" and r
A new condition C(n)J is stored and n-1 is inserted into n. Namely.

After making the hierarchy one layer shallower, the process returns to step 5l12.

If n = 1 in step 5112, step 511
Proceed to step 4. In step 5114, the conditional statement stored in the memory S and the imported control statement are matched, and in step 5
Proceed to 115. In step 5l15, it is determined whether K (i)=1. If step 5115 is negative,
Proceed to step 8116 and insert i-1 into i, step 5
Return to 115.

If K (i)=1 in step 5115, the process returns to step 5102 again.

If step SL, 05 is ")", step 8
Proceed to step 106. In step 5106, K(i) is 0.
and i-1 are inserted into i, respectively, and the process proceeds to step 5107. In step 5107, it is determined whether i=0, and if negative, the process returns to step 5102 again. If i=0, the process ends.

When the above processing is completed, the process proceeds to step S20 in FIG. 5, and the results are displayed. Now, when the above processing is performed on the control program shown in Figure 8, the conditional statement and control statement are
As shown in the figure, they are associated in the form of a list, and this list is displayed on a screen such as a CRT. When the operator looks at this screen and inputs which range is to be 'ItliA'ed (step 530), registration is executed in step S40. As a result, a list of conditional statements and control statements as shown in FIG. 9 is stored in the external storage device 3 as a database. After that, the process proceeds to step S50, and it is determined whether to perform a replacement process that displays the description of the conditional statement in the program list in its actual state. , the process ends without replacing.

FIG. 10 shows the state in which the conditional statement in the program list of FIG. 3 has been decoded and replaced in the program list.

Note that when such replacement processing is performed, the conditions, specific contents of the conditions, and control contents are compiled into a database as a list, as shown in FIG.

Next, based on FIG. 7, a search process for a database already registered in the external storage device W3 will be explained.

In step S71, a state corresponding to a certain condition is input as a search item. In step S72, it is determined whether the same search item as the input search item exists in the database of the external storage device 3, and if so, in step S73,
Displaying input conditions and control contents as a pair 1 For example, in the case of FIGS. 3 and 4, when rTW (25J is input, "TW (25J" and control A are displayed.

If there are no identical items, the process advances to step S74, and similar items,
Determine if there are comprehensive items or partial-several items. If either exists, proceed to step S75.

Items that are similar, comprehensive, or partially match the input conditional statement are displayed together with the corresponding control contents. If there is no item, a message to that effect is displayed in step 876 and the process ends.

Here, for example, if the input item is rTW (25), rT
W (items with similar content, such as 2oJ, are called similar items,
Inclusive items are rTW<25 and t-5 tart-on
Items that include rTW〈25'', such as <300J,
Partial-number items are rTW <25 or t-s ta
rt-on (rTW (2
It is an item like 5J.

The database search described above is used when creating a new control program using an existing control program, and by looking at the display as shown in Figures 4 and 9, you can enter search items. The conditions and corresponding control details can be understood at a glance. Furthermore, if the search results are replaced, a list like the one shown in FIG. 10 in which the conditions are written in the program list is displayed, so that complex nested programs can be visually expressed.

Therefore, the efficiency of program creation work and the ability to pass it on to others are improved.

Although the above description has been given of an automobile control program written in C language, the present invention can be used as a development support device for various programs consisting of judgment statements, condition statements, and control statements.

In the configuration of the above embodiment, the judgment sentence extraction means 1o19
The conditional sentence decoding means 102 and the control sentence extracting means 103 are constituted by the control device 5, and the output means 104 is constituted by the display device 2 such as a CRT.

G0 Effects of the Invention According to the present invention, a judgment statement is extracted from a program, a conditional statement is decoded, and a control statement corresponding to the decoded conditional statement is extracted and outputted in association with the conditional statement. As a result, even in a program where various judgment statements are intricately related, the conditions are clear at a glance, and the corresponding control contents are also clear, making it easier to recognize the control program and improving its transmission.

[Brief explanation of the drawing]

FIG. 1 is a complaint correspondence diagram. FIG. 2 is a block diagram showing the overall configuration of the program development support device according to the present invention, FIG. 3 is a diagram showing an example of a program list, FIG. 4 is a diagram showing the contents of a database, and FIGS.
FIG. 7 is a flowchart showing the database creation program and search program, FIGS. 8 and 9 are diagrams showing the control program list and the conditional statements and control statements associated with it, and FIG. 10 shows the conditional statements and their states. FIG. 3 is a diagram showing a program list that has been replaced with the contents shown in FIG. 01 03 Two-man power device: External storage device: Judgment sentence extraction means: Control sentence extraction means 02 04: Display device: Internal storage device Two-article composition decoding means: Output means Fig. 1

Claims (1)

[Scope of Claims] A development support device for creating a program including judgment statements, conditional statements, and control statements, comprising judgment sentence extraction means for extracting the judgment sentences, and condition statements for decoding the condition sentences from the extraction results. A program development support system comprising a decoding means, a control statement extraction means for extracting a control statement corresponding to the decoded conditional statement, and an output means for outputting the extracted control statement in association with the conditional statement. Device.