JPH03292532A - Back-up device for development of program - Google Patents

Abstract

PURPOSE:To easily recognize a developed control program by extracting a judging sentence out of a program in order to decode a conditional sentence, extracting a control sentence corresponding to the decoded conditional sentence, and then outputting the hierarchical conditional sentence with the correspondence secured to the control 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, and a control sentence extracting means 103 which extracts a control sentence corresponding to the decoded conditional sen tence. Furthermore a hierarchical structure means 104 is added to turn the decoded conditional sentence into a hierarchical form together with an output means 105 which outputs the extracted control sentence in correspondence secured to each hierarchical conditional sentence. That is, a 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. Furthermore the conditional sentence is turned into a hierarchical form, and this hierachical conditional sentence is outputted to a CRT, etc., with correspondence secured to the control sentence. 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, which is similar to assembly language. In a control program written in such a high-level language, if defined in the programming language,
It is necessary to determine the judgment statement from the descriptions of then, else, etc., and decipher the control content written by the combination thereof.

FIG. 9 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℃” (conditional sentence a), “A
” (control statement b).

■ "If the water temperature TV is less than 25° C. and less than 300 seconds after the starter is turned on" (conditional statement c), perform the processing control called rB" (control statement d).

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

Problems to be Solved by the C0 Invention However, even in a control program with the number of steps shown in FIG. 9, it is difficult to decipher one conditional statement e. Much less,
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.

Means for Solving Problems No. 90 The present invention will be explained in conjunction with FIG. 1, which is a claim correspondence diagram. 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 stratification means for hierarchizing the decoded conditional sentence. 104, and an output means 105 that outputs the extracted control statement in association with each hierarchical conditional statement.

80 actions Judgmental sentences such as if, then, and else are extracted, the conditional sentences are decoded, and the control sentences corresponding to the decoded conditional sentences are extracted. Furthermore, the conditional statements are hierarchized, and control statements are associated with the hierarchized conditional statements 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. 10 is an input device such as a keyboard 10a and a mouse 10b for inputting commands, 20 is a display device such as a CRT for displaying input characters, and 30 is a
This is a control device that reads an already developed control program 40 as shown in FIG. 3, and performs processing such as making conditional statements and control statements correspond to each other and hierarchizing them.

This control device 30 includes a deciphering unit 31 that extracts judgment sentences and deciphers conditional sentences, an extraction unit 32 that extracts control sentences corresponding to the deciphered conditional sentences, and a deciphered conditional sentence and extracted control sentences. a hierarchization processing unit 33 that hierarchizes and associates sentences with each other;
A display processing section 34 that processes to display conditional statements and control statements that are hierarchically associated with each other, an input signal processing section 35 that processes signals from the input device W1.10, and an input device! 1
Command analysis unit 36 that analyzes the command issued by 0
, a parameter extraction unit 37 that extracts parameters (conditions) specified from the input device 10, and an analysis and expansion processing unit 38 that analyzes and expands the input table-format condition part. Each of these elements constituting the control device 30 is actually realized as a program as shown in FIG.

When the program shown in FIG. 4 is executed, in step S5, a source program as shown in FIG. 3 is selected from among the already developed control programs 40 and read in. In step 5LOA, the source program is read.

The judgment statement is extracted from the control program, the conditional statement is deciphered, the control statement is extracted in step 5 LOB,
In step 5 IOC, the conditional statements are hierarchically arranged and the conditional statements in each hierarchy are associated with control statements.

Here, the program in FIG. 3 consists of at least one control statement Processl, Process2,
Pr.

It includes four processes, Process2-1 and Process3, and two processes Process2-1 and Process3 are executed for if statement 2, which is a judgment statement.
In 2-1, one process 3 corresponds to the else-if statement 3. Process P r
ocess 1 is an unconditional process and does not correspond to any judgment statement.

jf statements 2 and 3 and Processl, Process
2, Process2-1 and Process
3 is extracted by executing step Sho,
Its hierarchical structure is determined.

FIG. 5 is an image diagram of the internal representation in the layering processing unit 33 after the completion of such processing. That is, adv-caQ
The function named Processl,
It is expressed hierarchically in the order of Process2, Process2-1 and Process3,
The following processing becomes easier.

The hierarchical structure is displayed on the screen 21 as, for example, the first layer shown in FIG. 6(a) and all the layers shown in FIG. 6(b).
cess2, Process2-1 and Pro
cess 3 is associated with the if syntax or 3 of each layer. Furthermore, as shown in FIG. 6(c), the process P ro
cess 1 yProcess 2, Pro
The contents of process 2-1 and process 3 are displayed in detail.

In addition, such steps 5LOA to 5IOC
Syntax analysis as shown in Figure 1 is possible using the same method as the parser section of a compiler, and is possible using Unix's Qex and yacc.
However, in the case of C language as shown in Figure 3, if, without using such a method,
Judgment sentences can be easily extracted by searching for ``else'', and conditional sentences can be deciphered by focusing on (,), etc. FIG. 7 shows a detailed program for syntax analysis using such a method.

Here the program is 1Lif” II el seI
+11 (PI, 11)" It is assumed that it consists of one conditional statement and a control statement. This algorithm searches after the function name, and the program is "if"else"
“(” 11) 712 It is imported for each conditional statement and control statement.

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 8108, 1 is assigned to the flag K (i) for each layer, and again in step 51
Return to 02.

If step 5102 is negative, the process proceeds to step 5103 to determine whether or not it is rifJ, and if it is determined to be rifJ, the process proceeds to step 5109. Step 51
In step 09, 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 rel, seJ or not, and rel
If it is determined that “s e”, step S110
Go forward. In step 5110, i=i+1 is inserted and the negative statement of C(i) is stored in array C(i), and step 5
Return to 102.

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 5IO6; 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 "if", the statement of the program that has been imported is a control statement.

In step 5111, the value of variable 1 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;
Memory S contains "conditions previously stored in S"
A new condition C(n)J is stored and n-1 is inserted into n. That is, after making the hierarchy one layer shallower, the process returns to step 5l12.

If n=1 in step 5112, the process advances to step 5114. In step 5114, the conditional statement stored in the memory S and the imported control statement are matched, and in step 511
Proceed to step 5. In step 5l15, it is determined whether K(i)=1. If step 5115 is negative, proceed to step 5116] and insert 1-1 in step 5115.
Return to

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

If it is ")" in step 5105, step 5l-0
Proceed to step 6. In step 5106, K(i) is set to O
1-1 is inserted into each of the fields, and the process proceeds to step 5107. In step 5107, it is determined whether i = Q, and if negative, the process returns to step 5102 again. If 1=◯, the process ends.

When step S10 is completed as described above, the process proceeds to step S20 shown in FIG. 4, where the command input by the operator from the input device 10 is analyzed.

If it is an end command, the process advances to step S70 to perform end processing such as file updating.

In the case of a display hierarchy selection command, the process advances to step S30, and each hierarchy is displayed. FIG. 6(a) shows an example of displaying the first layer on the display screen 21 when the program shown in FIG. 3 is subjected to layering processing, and FIG. 6(b) shows an example of displaying all layers.

In the case of the display level selection command, the process advances to step S40 to change the level of the two-layer display. FIG. 6(c) is an example in which the level of all hierarchy display is changed to detailed mode.

Step S5 in case of process editor startup command
0, start the process editor as a separate screen, and enter the edit mode for the process file corresponding to each process name. FIG. 6(c) shows an example in which a source list of process 2 is displayed as a separate screen 22 within the detailed hierarchy display screen 21.

Note that editing is performed within this separate screen using a normal text editor command.

Furthermore, in the case of a parameter specification command, step S6
Go to 0 to display the process in detail, including the parameters specified by the operator. Figure 8 is.

An example is shown in which nrpm (number of revolutions) is specified as a parameter, and the entire syntax including processes related to nrpm is displayed in a hierarchical manner.

The program syntax analysis described above is used when creating a new control program using an existing control program. Hierarchical structures and their corresponding control statements, or processes, can be visually represented. Therefore, even if the already developed control program has a complicated nested structure, its contents can be understood at a glance, and the efficiency of the program creation work and the ability to pass it down are improved.

Although the control program written in C language has been described above, the present invention can be used as a development support device for various programs including judgment statements, condition statements, and control statements.

In the configuration of the above embodiment, judgment sentence extraction means 101,
The conditional sentence decoding means 102 corresponds to the conditional sentence decoding section 31, the control sentence extraction means 103 corresponds to the control sentence extraction section 32, the 1 layering means 104 corresponds to the layering processing section 33, and the output means 1
05 corresponds to each display device 20 such as a CRT.

G1 Effect of the Invention According to the present invention, a judgment statement is extracted from a program, a conditional statement is decoded, a control statement corresponding to the decoded conditional statement is extracted, and a control statement is created into a hierarchical conditional statement. Because statements are output in association with each other, even in complex programs where various judgment statements are intricately related, set conditions and control statements, that is, processes, are layered and can be clearly understood at a glance. Therefore, it becomes easy to recognize already developed control programs.
The efficiency of developing new programs and their ability to be handed down will be improved.

[Brief explanation of drawings]

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, FIGS. 4 and 7 are flowcharts of hierarchical structure processing, and FIG. 5 is a hierarchy An image diagram of the internal representation of the conversion processing section,
6 and 8 are diagrams showing examples of displays on the screen, and FIG. 9 is a diagram showing an example of a program list. 10: Input device 3Q: Control device 32: Control statement extraction section 36: Command analysis section 1o1: Judgment statement extraction means 103: Control statement extraction means 1o5: Output means: Display device: Conditional statement decoding section: Hierarchization processing section: Parameter Extraction part 2-article intercourse decoding means 2-layering means 0 1 3 8 02 04

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 decoding means, a control statement extraction means for extracting a control statement corresponding to each decoded conditional sentence, a stratification means for stratifying the decoded conditional sentences, and a hierarchization means for classifying the extracted control sentences into each hierarchized condition. 1. A program development support device comprising: an output means that outputs data in association with a sentence.