JPH023832A - Translation system for source program including input/ output sentence without format - Google Patents

Abstract

PURPOSE:To set the processing of data transfer only once and to attain a high speed input/output processing by permitting a user to designate a translation time instruction line immediately before an input/output sentence concerned and to process an input/output list as one variable area. CONSTITUTION:An area assignment means 21 inputs a source program 1, detects the translation time instruction line, and checks whether it is grammatically possible to assign the input/outputs, an appeared variable or the area of an array in an appeared order, or not. Next, an information table generation means 22 takes a series of assigned areas for one variable area, generates information on a position and a length with respect to the variable area concerned and stores them in an information table 24. An object program generation means 23 inputs the information table 24, and generates an object program 4 calling the input/output execution processing means of OS. Thus, it comes to be unnecessary to execute the processing of data transfer for plural times.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for translating a source program containing unformatted input/output statements written in a high-level programming language.

[Conventional technology]

In general, when translating a source program, the input/output statements of the source program and the respective areas of variables or arrays that appear are allocated according to the grammatical rules of the high-level programming language, and the order within the area is determined. may be taken in any order and position, except as determined. Therefore, the input/output areas of input/output statements and the areas of variables and arrays that appear are generally not contiguous.

Therefore, up to this point, the case of generating a target program that calls the input/output execution processing means of O8.

It is not possible to generate an information table all at once for the input/output of the input/output statement and the areas of multiple variables and arrays that appear. An information table is generated for each area, and these are used to program the target program. was being generated.

[Problem to be solved by the invention]

However, in such a conventional method, when the input/output execution processing means of O8 performs input/output processing.

The inputs and outputs as well as the multiple variables or arrays that appear are processed according to an information table generated.

That is, since the information tables must be referred to one by one and the positions and lengths of the variables or arrays mentioned above must be evaluated, this evaluation is time consuming.

Furthermore, since the variable or array areas are not continuous, data must be transferred for each area. In a general computer, it takes more time to transfer the data in multiple parts than to transfer it in multiple passes, so such input/output statements become an impediment to speeding up.

Therefore, in view of the above-mentioned drawbacks, the technical problem of the present invention is to divide the processing of input/output of unformatted input/output statements, evaluation of variables and arrays, and data transfer thereof into multiple times even if multiple variables and arrays appear. The objective is to provide a translation method that does not require manual translation.

[Means to solve the problem]

According to the present invention, in a computer that inputs a source program written in high-level glogramin language and generates a target program.

For an unformatted input/output statement specified by the instruction line during translation of a source program, allocate areas for the input/output of the input/output statement and the variables and arrays that appear in consecutive areas in the order in which the input/output and the variables and arrays appear. area allocation means that allocates these areas contiguously if possible.

Information table generation means that regards the series of areas allocated by the means as one variable area and generates one information table for the variable area.

A source program translation including an unformatted input/output statement, characterized in that it has an object program generating means for generating an object program that calls an input/output execution processing means of an O8 using the information table generated by the means. method is obtained.

〔Example〕

Next, an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a functional block diagram of a fungilla according to an embodiment of the present invention.

The area allocation means 21 inputs the source program 1, detects the instruction line at the time of translation, and, for the unformatted input/output statement specified by this instruction line, assigns the areas of the input/output and variables or arrays that appear in the order in which they appear. Check whether it is grammatically possible to allocate the variables or arrays to the data area 3, and if possible, allocate the variables or arrays to the data area 3 consecutively in the input/output order and the order in which they appear.

Next, the information table generating means 22 regards the series of areas allocated by the means as one variable area, generates information including the position and length of the variable area, and stores it in the information table 24.

Then, the object program generating means 23 inputs the information table 24 and generates the object program 4 that calls the input/output execution processing means of O8.

FIG. 2 is an example showing the flow from the source program 5 to the generation of the target program 7 that calls the input/output execution processing means 81 of 088 when the present invention is applied.

Immediately before the unformatted input/output statement in source program 5.

/umbrella OPTIMIZE is specified, the controller 6 allocates contiguous areas for the variables and arrays A, B, and C that appear in the input/output line of the input/output statement, and The area is regarded as one variable area DATA, and the variable area D
Generate an information table for the ATA.

Further, the controller/mother 6 uses the information table of the variable area DATA to generate the object program 7 that calls the input/output execution processing means 81 of the O88.

〔Effect of the invention〕

As explained above, according to the present invention, even if there are multiple inputs/outputs and variables and arrays that appear in an unformatted input/output statement, the user can specify a translation instruction line immediately before the input/output statement. Since the input/output array is processed as one variable area, the input/output execution processing means of O8 is called, and the evaluation of the variables and arrays and data transfer processing are performed only once, resulting in high-speed input/output processing. can.

Means for area allocation, 22... Information table generation means.

23... Objective program generation means, 24... Information table, 3... Data area, 4... Objective program, 5... Source program, 6... Compiler, 7.
...Objective program, 71...Information table, 8...
- O8, 81... Input/output execution processing means, 9... Data area.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram of a controller/4' controller according to an embodiment of the present invention. FIG. 2 is a diagram showing the flow of generating a target program from a source program.

Claims (1)

[Claims] (1) In a compiler that generates a target program by inputting a source program written in a high-level programming language, the compiler uses a predefined input/output statement immediately before an unformatted input/output statement that does not perform data conversion during input/output processing in the source program. If a translation instruction line containing a character string is inserted, the area of the variable or array is contiguous in the order in which it appears as an input/output list for the input/output and variables and arrays that appear in the unformatted input/output statement. an area allocation means for allocating these areas consecutively if it is possible to allocate these areas; and an area allocation means that regards the series of areas allocated by said means as the area of one variable, and information including the position and length of the variable area. an information table generation means for generating a table; and an OS using the information table generated by the means.
1. A source program translation method including an unformatted input/output statement, characterized by comprising: objective program generation means for generating an objective program that calls an input/output execution processing means.