JPS61160139A - Automatic stepping editor of program list - Google Patents

Abstract

PURPOSE:To form a stepped list rapidly and precisely by analyzing a block structure, and while stepping respective blocks in accordance with the hierarchical levels of respective blocks, editing and outputting data. CONSTITUTION:The block structure analyzing part 12 of an automatic stepping editor 1 reads out a source program 2 temporally stored in a reading part 11 in each sentence, and if the read sentence is a starting sentence or an end sentence, the hierarchical level is increased by one step or reduced by one step respectively to form a block structure information table and hold the table in a structure information holding part 13. After the analysis of the block structure, a list editing part 14 executes the stepping edition of the list for a source program received from the source program reading part 11 while referring a block structure information table held in an information holding part 13. A list output part 15 receiving the edited result outputs a stepped source program list 3.

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention Industrial Field of Application The present invention relates to an editing apparatus for automatically grading a source program list used in an electronic computer system.

A list of conventional technology source programs is essential for program development and maintenance, and it is desirable that the list be edited in such a way that the contents of the program can be easily understood.

A source program written in a high-level language such as ALGOL is composed of a set of blocks separated by a start statement such as BEGTN and an end statement such as END, and in order to understand its contents, it is necessary to grasp the block structure. This is very important. In order to make it easier to understand the block structure, it is effective to create a so-called stepped list in which the starting column position of the descriptive sentence is lowered according to the hierarchical level of the block.

Problems to be Solved by the Invention Conventionally, the creator of the source program manually arranged columns in the source program list, which was tedious and easy to make mistakes, making it difficult to understand the contents. The problem was that it could actually become more difficult.

Means for Solving the Constituent Problems of the Invention The automatic indentation editing device of the present invention, which solves the problems of the prior art described above, increases the hierarchy level each time a start sentence is read for a block-structured source program. , by providing a block structure analysis means for analyzing the block structure while decreasing the hierarchical level each time an end sentence is read, and a means for editing and outputting each block while grading each block according to its hierarchical level, The system is structured so that you can quickly and reliably create a list.

Hereinafter, the effects of the present invention will be explained in detail using nine examples.

Embodiment FIG. 1 is a block diagram showing the configuration of an automatic indentation and editing apparatus according to an embodiment of the present invention.

The editing device 1 has a source program reading section 11 that reads and temporarily stores a source program 1 having a block structure consisting of a set of blocks, and receives the source program one sentence at a time from the reading section 11. A block structure analysis section 12 that analyzes the block structure, a structure information holding section 13 that holds information regarding the analyzed block structure, and a list editing section 14 that edits a source program list based on this structure information. The program includes a list output section 15 that outputs a completed list as a source program list 3.

This automatic indentation device 1 may be configured as a part of the compiler, or may be configured as an independent device.

The source program 2 to be edited with automatic indentation is
The second step is BE
It consists of blocks separated by starting statements such as GIN, IF, LOOP, etc. and ending statements such as END.

For automatic paragraphing, the block structure analysis unit 12 of the editing device 1 reads the source program 2 temporarily stored in the reading unit 11 one sentence at a time, and if the read sentence is the start sentence, increases the hierarchy level by one step, If it is an end sentence, the hierarchy level is decreased by one step to create a block structure information table and this is held in the structure information holding section 13.

The block structure information table, as illustrated in FIG. or fields for displaying each of the starting and ending rows of a series of swarms.

That is, in the case of the source program illustrated in FIG. 2, the block structure information field of record number (R) ■ indicates that the first line is the first start statement BIGIN through the processing of the block structure analysis unit 12. Correspondingly, nine hierarchy levels 0 and a start line and an end line, respectively l, are recorded. Also, in the block structure information field of record number 2.

Corresponding to the fact that the second line of the source program is a new start statement BIGIN immediately after the start statement, a start line and an end line each having a level 1 and 2 are recorded. moreover,
The block structure information field of record number 3 contains I
Corresponding to the series of large groups from the 3rd line immediately after the F sentence to the 8th line immediately before the new start sentence LOOP, there are 2 hierarchical levels 2,
A start line 3 and an end line 8 are recorded.

In the same way, the block structure information field of record numbers 3, 4, 5, etc. is set to the 1st layer level (L).
and the start and end lines of a single statement or series of groups belonging to this hierarchy level are recorded.

When the analysis of the above block structure is completed, the list editing section 1
4 edits the columnarization of the list for the source program received from the source program reading section 11 while referring to the block structure information table held in the information holding section 13. Upon receiving this, the list output unit 15 outputs the edited source program list 3 with two columns. The steps are the edited source program, List 3.

As shown in Figure 4, the beginning positions of the start and end sentences of each block are displayed in the same column, and blocks with nine higher hierarchical levels are displayed with a larger indentation, making the block structure clear at a glance. It becomes.

An example of the analysis operation of the block structure analysis section 12.

This will be explained based on the flowchart shown in FIG.

When the process is started in the block structure analysis unit 12, first, in step 21, initial settings are performed such that the record number R becomes 1, the first layer level L becomes 0, and the number of lines n becomes 1. In the next step 22, the first sentence of the source program temporarily stored in the source program reading section 11 is read, and in the first step 23 it is determined whether this is a start sentence. If this is not a start sentence, it is determined in the second step 24 whether or not it is an end sentence, and if it is not an end sentence, the number of lines n is incremented in step 25, and then in step 22 the source program reader The next sentence is read from 11.

If it is determined in step 23 that it is a start sentence, the record number and block structure information are written in the block structure information field corresponding to the record number (R) in the block structure table in step 26. That is, the current hierarchy level L is written in the 2nd hierarchy level field, and the current number of rows n is written in the start row field. When this writing is completed, the hierarchy level (L) is incremented in the ninth step 27, and the record number (R) and the number of lines (n) are further incremented in the next step 30.
are each incremented. In the next step 31, it is determined that the process has not been completed.

The process returns to step 22, and the next sentence is read from the source program reading section 11.

If it is determined in step 24 that it is an end sentence, in step 28 the previous record number (R-
The current number of lines n is written in the end line field corresponding to 1). When this writing is completed, the hierarchy level 1 is decreased by 1 in step 29, and the process returns to step 22 via steps 30 and 31 to read the next sentence.

In step 31, the source program reading section 11
The above-described process is repeated until it is determined that the analysis of the entire text of the source program stored in the source program has been completed, and a block structure information table as illustrated in FIG. 3 is created.

Effects of the Invention As explained in detail above, the automatic indentation editing device of the present invention increases the hierarchy level each time it reads a start sentence, decreases the hierarchy level each time it reads an end sentence, and improves the block structure. Since it is equipped with a block structure analysis means for analyzing and a means for editing and outputting each block while grading it according to its hierarchical level, unlike conventional methods, it does not require complicated labor and eliminates operator errors. It is possible to quickly and reliably edit and output a list with columns without any editing errors based on the above.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a conceptual diagram illustrating a source program list before editing, and FIG. 3 is a structural information holding section of FIG. 1. 4 is a conceptual diagram illustrating an example of an edited source program list, and FIG. It is a flowchart explaining an example of operation. 1. Automatic columnar editing device, 2. Source program, 3. Source program list. 11: Source program reading unit, 12: Block structure analysis unit, 13: Structure information holding unit, 14: List editing unit, 15: List output unit.

Claims (1)

[Claims] A source program consisting of a set of blocks separated by a start statement and an end statement is read sequentially, and the block structure is analyzed by increasing the hierarchy level each time a start statement is read and decreasing the hierarchy level each time an end statement is read. Automatic columnarization of a program list characterized by comprising a block structure analysis means and an editing means for editing and outputting a list of the source program while grading each block according to its hierarchical level. Editing device.