JPH0319021A - Production system for inverted code conversion dictionary file - Google Patents

Abstract

PURPOSE:To easily produce a code conversion dictionary file having high reliability by calculating an unconverted code to be stored in an inverted code conversion table from a converted code together with the storing offset value and storing these calculated code and value in the inverted code conversion table. CONSTITUTION:A code conversion dictionary file 1 is provided with a code conversion table where a converted code is stored in the position of the offset value calculated from an unconverted code. Then an inverted code conversion dictionary file production part 2 is added to produce an inverted code conversion dictionary file together with an inverted code conversion dictionary file 3 which stores the inverted code conversion table in the same form at as the file 1. Then an unconverted and the storing offset value to be stored in the inverted code conversion table are calculated from converted code against a code and stored in the inverted code conversion table. Thus the reference of the unconverted code and its corresponding converted code can be all omitted within a conversion object range as long as a code conversion dictionary file of the single direction is available. Consequently, a code conversion dictionary file having the inverted conversion table can be easily produced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for creating a reverse code conversion dictionary file.
In particular, the present invention relates to a method for creating a reverse code conversion dictionary file that performs reverse code conversion using an existing code conversion dictionary file.

[Conventional technology]

Conventionally, the method of creating a code conversion dictionary file used for code conversion is to write all the pre-conversion codes within the conversion target range and the corresponding post-conversion codes as the information necessary to create the code conversion dictionary file. It was created by.

[Problem to be solved by the invention]

In the conventional code conversion dictionary file creation method described above, all pre-conversion codes and corresponding post-conversion codes within the conversion target range are written, so when creating a reverse code conversion dictionary file, However, since the same number of descriptions of the pre-conversion code and the post-conversion code are required, the amount of data to be described is large, the time spent on the description is large, and the incidence of writing errors is also high.

[Means to solve the problem]

The method for creating a reverse code conversion dictionary file of the present invention includes a code conversion data development means that develops a code conversion table by referring to an existing code conversion dictionary file, and an inverse code conversion table that enables reverse code conversion of the code conversion table. Initializes the code conversion table and stores all codes in the reverse code conversion table starting from the converted code for all codes except when the converted code for the pre-conversion code in the code conversion table is undefined (hereinafter referred to as invalid code). a reverse code conversion data generation means that calculates the pre-conversion code and storage offset value to be stored in a reverse code conversion table; and a code conversion data output that outputs the code conversion data of the created reverse code conversion table to a code conversion dictionary file. and means.

〔Example〕

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

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 1 is a code conversion dictionary file that has a code conversion table in which the post-conversion code is stored in the position of the offset value calculated from the pre-conversion code, and is required when creating a reverse code conversion dictionary file in the present invention. This is the input file. 2 is a reverse code conversion dictionary file creation unit that creates a reverse code conversion dictionary file. 3 is a reverse code conversion dictionary file in which a reverse code conversion table is stored in the same format as the code conversion dictionary file 1, which enables code conversion opposite to the code conversion processed by the code conversion dictionary file 1; This is an output file output from the reverse code conversion dictionary file creation section 2.

Further, the reverse code conversion dictionary file creation section 2 generates a code conversion dictionary file 1 of zero order, which is composed of a code conversion data expansion means 11, a reverse code conversion data generation means 12, and a code conversion data output means 13. An explanatory diagram of the code conversion table constituting the code conversion table is shown in FIG. This will be explained with reference to the flowchart shown in FIG.

FIG. 2 is a code conversion table that constitutes the code conversion dictionary file 1 and the reverse code conversion dictionary file 3, and the offset value is calculated from the pre-conversion code so that the post-conversion code 21 can be uniquely determined by the pre-conversion code. are stored in the respective locations.

Referring to FIG. 3, in step 31, the code conversion data development means 11 secures an area in memory to store the code conversion table of the code conversion dictionary file 1, and in step 32, the code conversion data development means 11 secures an area for storing the code conversion table of the code conversion dictionary file 1. The data is read and the code conversion data is stored in the area secured in step 33. It is determined in step 34 whether all code conversion data has been stored.

In FIG. 4, the reverse code conversion data generation means 12 is
First, in step 41, an area for storing the reverse code conversion table is prepared in the memory, and in step 42, the area secured is initialized. The converted code is extracted from the code conversion table area created in step 34, and it is determined in step 44 whether or not the extracted code is a fraudulent code.If the result of the determination is that it is not a fraudulent code, step 45 is performed. - Perform the pre-conversion code and offset value calculation process in step 47. First, calculate the pre-conversion code that will become the post-conversion code in the reverse code conversion table from the offset value where the post-conversion code extracted in step 3 was stored. (Step 45). Next, the offset value in the reverse code conversion table area (secured in step 41) for storing the pre-conversion code obtained in step 45 is calculated from the post-conversion code. Finally, the pre-conversion code in step 45 is stored in the position of the offset value calculated in step 46. The processes of steps 43 to 47 are performed on all the converted codes to create a reverse code conversion table.

It is determined in step 48 whether all the converted codes have been processed.

In FIG. 5, the code conversion data output means 13 outputs the code conversion data in the reverse code conversion table area created in steps 41 to 48 to the reverse code conversion dictionary file 3 (step 51). A determination as to whether all code conversion data has been output is made in step 52.

〔Effect of the invention〕

As explained above, in the reverse code conversion dictionary file creation method of the present invention, if a one-way code conversion dictionary file exists, it is possible to This eliminates the need for any standards between codes and converted codes, and has the effect that a code conversion dictionary file having an inverse code conversion table can be easily created. Another advantage is that a highly reliable code conversion dictionary file can be created without any writing errors.

[Brief explanation of drawings]

FIG. 1 is a program diagram showing the configuration of an embodiment of the present invention;
Fig. 2 is an explanatory diagram of the code conversion table that constitutes the code conversion dictionary file, Fig. 3 is a flowchart showing the processing contents of the code conversion data development means, and Fig. 4 shows the processing contents of the reverse code conversion data generation means. The flowchart in FIG. 5 is a diagram showing code conversion data output means and processing contents. DESCRIPTION OF SYMBOLS 1... Code conversion dictionary file, 2... Reverse code conversion dictionary file creation part, 3... Reverse code conversion dictionary file, 11... Code conversion data development means, 12...
- Reverse code conversion data generation means, 13... code conversion data output means.

Claims (1)

[Claims] Code conversion data development means for developing a code conversion table by referring to an existing code conversion dictionary file, and initialization of a reverse code conversion table that enables code conversion in the opposite direction of the code conversion table. The pre-conversion code and storage offset to be stored in the inverse code conversion table from the post-conversion code for all codes except when the post-conversion code for the pre-conversion code in the code conversion table is undefined (hereinafter referred to as illegal code). A code conversion data generating means for calculating a value and storing it in a reverse code conversion table; and a code conversion data output means for outputting the code conversion data of the created reverse code conversion table to a code conversion dictionary file. A method for creating a reverse code conversion dictionary file, which is characterized by: