JPH0950430A - Character code converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To convert data into one code system data by executing conversion once by performing the conversion to one code system even when the data of plural code systems are present and performing the correction of an overlapping code for performing the conversion into the code of the same code system as the code system before and after the conversion when the code to be converted overlap each other. SOLUTION: A conversion table 1 merges plural code conversion tables and a conversion means 2 converts inputted character codes in which the plural code systems coexist into the codes of one code system by referring to the conversion table 1. That is, the conversion table 1 for which the two code conversion tables for performing the conversion from a certain character code to the other character code are merged beforehand and the code of higher priority determined beforehand is set for the set and overlapping code is prepared and the conversion means 2 refers to the conversion table 1 and converts the inputted character codes in which the plural code systems coexist, to be of one code system. Thus, plural code system character strings are extracted by executing processing once.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a character code conversion device for rapidly converting a character code mixed with a plurality of code systems by using one conversion table.

In the recent trend of openness, not only a character string of a single code system as in the past, but also character strings of a plurality of code systems are flooded in a computer system. Under such circumstances, a function of quickly detecting a specific character string is required. Especially, from a large amount of data such as a memory dump, a specific character string (for example, an eye catche that is provided in advance to identify a group of specific data
When detecting a character string such as r), there is a demand to be able to detect character strings of multiple code systems at the same time.

[0003]

2. Description of the Related Art A conventional code conversion process is, for example, ASCII /
ASCI when handling data with mixed EBCDIC code systems, or when it is unknown which code system data
Conversion table from I to EBCDIC and E with special code
Prepare two conversion tables of conversion table from BCDIC to standard EBCDIC, specify which conversion table to use from the outside with some option or parameter to the conversion table, and input using the specified conversion table I was trying to convert the specified code to the specified code.

[0004]

As described above, in the conventional code conversion processing, as many conversion tables as the number of conversions are prepared in advance, and a conversion table specified from among the conversion tables is used to convert to a specified code. Therefore, it is necessary to have as many conversion tables as necessary to convert, and it is necessary to externally specify which conversion table to specify, and further convert to one code system at a time. However, when a plurality of code systems in the data are mixed, the code conversion process needs to be performed a plurality of times, resulting in a problem that the process is complicated and slow.

The present invention solves these problems.
Even if multiple code systems coexist, it is possible to convert multiple codes simultaneously from a large amount of data without specifying which conversion table from the outside, and at the same time by performing one code conversion process. The purpose is to extract character strings at the same time by one process.

[0006]

[Means for Solving the Problems] Means for solving the problems will be described with reference to FIG. In FIG. 1, the conversion table 1 is a combination of a plurality of code conversion tables.

The converting means 2 converts the input character code in which plural code systems are mixed into one code system code by referring to the conversion table 1. Next, the operation will be described.

A conversion table 1 is created in which two code conversion tables for converting a certain character code to another character code are merged and set, and for codes that are duplicated and set, a code having a predetermined higher priority is set. Then, the conversion means 2 refers to the conversion table 1 to convert the input character code in which a plurality of code systems are mixed into one code system.

Further, one conversion table 1 in which a plurality of code conversion tables for converting one character code into another character code are merged and set is created, and the conversion means 2 is input to the mixed character of a plurality of code systems. The code is converted into one code system by referring to this conversion table 1, and when the codes to be converted are duplicated, the code system converted before or after is selected and converted. .

Therefore, when a plurality of code systems are mixed, it is possible to simultaneously convert a plurality of codes by one code conversion process without designating which conversion table to use from the outside conventionally. , It has become possible to simultaneously extract character strings of a plurality of code systems from a large amount of data in one process.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment and operation of the present invention will be sequentially described in detail with reference to FIGS.

FIG. 1 shows a system configuration diagram of the present invention.
In FIG. 1, a conversion table 1 is a combination of a plurality of code conversion tables, and as shown in FIG. 4 described later, a plurality of code conversion tables for converting from one code system to another code system are merged. Is.

The conversion means 2 converts the input character code in which a plurality of code systems are mixed into one code system code by referring to the conversion table 1 (described later with reference to FIGS. 5 and 6). To).

The data 3 is data (character code) in which a plurality of code systems to be converted are mixed. The data input device 4 inputs data (character code) from a keyboard or the like with a code of a certain code system.

The display device 5 converts the code system converted by the conversion means 2 (for example, the intermediate code system handled in the computer, the EBCDIC code system, etc.) into characters and displays characters, symbols, etc. on the screen. Is.

The printing device 6 converts the code system converted by the conversion means 2 (for example, an intermediate code system handled in the computer, the EBCDIC code system, etc.) into a character and prints characters, symbols, etc. on the paper. Is.

The input result processing program 7 is the conversion means 2
Using the code system converted by (for example, the intermediate code system handled in the computer or the EBCDIC code system),
It is an application program that processes input results.

Next, the concept of the configuration of FIG. 1 will be described with reference to FIG. FIG. 2 shows an operation explanatory diagram of the present invention. FIG. 2A shows how to create a conversion table.

In FIG. 2A, ASCII → EBC
Select the DIC conversion table. This is EBCDI from ASCII code system as the code conversion table to be merged.
Select the code conversion table to convert to C code system.

Selects an EBCDIC → EBCDIC conversion table. This selects, as the code conversion table to be merged, a code conversion table for converting from the EBCDIC code system including the special code to the standard EBCDIC code system. At this time, if the special code is not in the standard EBCDIC code system, it is converted to, for example, a blank () or an asterisk (*) indicating that.

Is merged into the ASCII / EBCDIC → EBCDIC conversion table. This merges the code conversion tables of, for example, as shown in FIG. 4 described later. In this example, the area used by the ASCII-> EBCDIC conversion table and the area used by the EBCDIC-> EBCDIC conversion table are almost different, so that they are set as they are in the conversion table of FIG. At this time, the overlapping part is set as one conversion table 1 by assigning a circle according to a predetermined priority, or both code systems are left as they are.
When the actual code conversion is performed, the code systems of the character codes before and after the conversion are examined and the code system having the same code system is adopted for conversion (described later with reference to FIG. 6).

By the above, the code conversion tables of and are merged, and the conversion table 2 as shown in FIG. 4 is created. This makes it possible to convert EBCDIC from ASCII code
The conversion to the system code and the conversion from the EBCDIC including the special code of to the standard EBCDIC code can be performed by the conversion table 1 in FIG. 4, so that the ASCII code and the EBCDIC system code including the special code can be converted. Using the conversion table 1 shown in Fig. 4 as a standard EB
It becomes possible to convert the code into the CDIC system code by one conversion process. The details will be sequentially described below.

FIG. 2B shows a flowchart of code conversion. In FIG. 2B, S1 inputs data. For this, data (character code) in which the ASCII code of FIG. 2A and the EBCDIC code including the special code are mixed is input.

S2 refers to the code conversion table.
This refers to the conversion table 1 created in FIG. 2A, for example, the conversion table 1 in FIG. S3 is
Convert code. In S2, the code conversion is performed with reference to the conversion table 1 which is the conversion table 1 in FIG. 4, for example.

In step S4, the duplicate code is corrected. These S3 and S4 are converted into the code when one is set when the code is converted with reference to the conversion table 1 in FIG. 4, and before conversion after conversion when two are set or Later, the duplicate code is corrected by converting it into the code of the same code system.

At step S5, the data is displayed. This is S3
It is displayed on the screen developed into characters based on the character code converted in step S4 and the character code after the redundant code is corrected in step S4 if necessary.

As described above, even if there is data (character code) in which a plurality of code systems coexist, conversion is made into one code system by referring to the conversion table 1 in FIG. 4, and the codes to be converted are duplicated. If it has been set as above, the data (character code) in which multiple code systems are mixed is converted into one figure by correcting the redundant code that is converted to the code of the same code system as the code system before or after conversion. Four
It is possible to convert the data (character code) of one code system by one conversion process by referring to the conversion table 1 of 1.

Next, the operation of the configuration of FIG. 1 will be described in detail according to the order shown in the flowchart of FIG. In FIG. 3, S11 designates a conversion table. This designates the code conversion table for converting the ASCII code described on the right side to the EBCDIC code ((a) of FIG. 2).

In step S12, the conversion table is designated. This specifies a code conversion table for converting from the EBCDIC system code including the special code on the right side to the standard EBCDIC system code ((a) of FIG. 2).

In step S13, the above two conversion tables are merged. This merges the conversion tables designated in S11 and S12, for example, the conversion table 1 in FIG. The conversion table as it is merged (for example, the conversion table 1 as it is in FIG. 4) is converted into the conversion table A in S17, the table is completed in S18, and the process is terminated.

In step S14, it is determined whether there are duplicate items. In the case of YES, as a result of the merging, it is found that there is a duplicate item, so the process proceeds to S15. On the other hand, in the case of NO, it is determined that there is no duplicate item, so the process proceeds to S18.

In S15, since it is determined that there is a duplicate item in YES in S14, an appropriate one is selected for the code of the duplicate item. Here, the proper method of selection is selected according to the following priority described in the lower right.

When alphanumeric and symbol, select alphanumeric.・ When there are symbols, select the one with the highest priority. -As for the priority, the code system with the higher probability of use has a higher priority.

The priority is such that the main code system in the system is high. S16 is a conversion table B. This is S14 Y
Regarding the items duplicated in ES and S15, one that is selected as appropriate is used as the conversion table B.

At S18, the table is completed. As described above, the specified two conversion tables are merged, for example, the conversion table 1 shown in FIG. 4 is created and used as the conversion table A. Further, the conversion table in which the higher priority is selected from the duplicated items is selected. 1 is created and used as a conversion table B, and the conversion table is completed. By these, a plurality of conversion tables are merged to form one conversion table A.
(Conversion table 1 in FIG. 4) and conversion table B (conversion table in which one of the duplicated items in conversion table 1 in FIG. 4 marked with a circle remains) are completed.

FIG. 4 shows an example of the conversion table of the present invention.
This is an example of the conversion table 1 merged by the above-described FIGS. 2 and 3. As described in the lower row, the left side of the frame is EBCDIC and the right side is ASCII. Basically 00
ASCII is used up to 7F, and EBCDIC is used up to 80FF. In the conversion table B, the one marked with a circle is adopted.

Next, according to the order shown in the flowchart of FIG. 5, a plurality of code systems (here, ASCII and EBCDIC) are used when the conversion table 1 of FIG. 4 (conversion table B in which the circle is left here) is used. The operation when converting a mixed character code into one code system will be described in detail.

In FIG. 5, S21 inputs data. This inputs data in which different code systems are mixed. In S22, 1 byte is taken out.

In step S23, the conversion table B is used to convert the intermediate code (code system of the output device). As described on the right side, for example, the data X'45 'is converted to the code'E'(X'C5') by referring to the conversion table 1 in FIG. The conversion procedure finds "E" at the intersection of 4 in the upper frame of the conversion table of FIG. 4 and 5 in the left frame.

When the user has the code of “E” found in step C, finds C in the upper frame on the right side and 5 in the left frame, and extracts the conversion code “C5” to be obtained. In S24, it is determined whether the data is over. In the case of YES, the output device converts the converted code into a character and outputs (display or print) in S25. Here, X'C5 'is displayed as a character'E' on the screen or printed on the paper. On the other hand, S
In the case of NO in 24, the process returns to S21 and is repeated for the next data.

From the above, the conversion table 1 (○ in FIG.
Using the conversion table B) in which the code with the mark is left and the others are removed, the data in which the code system is mixed (character code)
Can be input and converted into one code system by one-time code conversion processing, and can be displayed / printed as a character.

Next, according to the order shown in the flow chart of FIG. 6, a plurality of code systems (here, ASCII and EBCDIC) are used when the conversion table 1 of FIG. The operation when converting mixed character codes into one code system will be described in detail.

In FIG. 6, in S31, data is input. This inputs data in which different code systems are mixed. In S32, 1 byte is taken out.

In S33, the conversion table A is used to convert the intermediate code (code system of the output device). For example, referring to the conversion table 1 of FIG.
Convert to E'code (X'C5 ').

In S34, it is determined whether or not there are duplicate items. If YES, the same character code type as the previous character code type is selected and converted in S35, and / or the same character code type as the latter character code type is selected and converted in S36. This is when converting using the conversion table 1 of FIG.
If two codes are set in that item, look at the code type before or after conversion,
Select the same code type and convert the code. (Since the character string has the property that the same code type is continuous in a series, when the code is set up in duplicate in the conversion table 1 item, The code type of the same code type is selected by looking at the code type of the character code before and / or after the conversion, and the code is converted.

A step S37 decides whether or not the data is over. Y
In the case of ES, the output device converts the converted code into a character and outputs (display or print) in S38. Here, X'C5 'is displayed as a character'E' on the screen or printed on the paper.
On the other hand, if NO in S37, the process returns to S31 and is repeated for the next data.

As described above, by using the conversion table 1 of FIG. 4 (the conversion table A in which the duplicated codes are left as they are), the data (character code) in which the code system is mixed is input, and one code conversion process is performed. It becomes possible to convert to a code system and display / print as a character.

[0048]

As described above, according to the present invention,
A plurality of code conversion tables are merged to create one conversion table 1, and when the data in which a plurality of code systems are mixed is input, the conversion table 1 is referred to and converted into one code system, or the conversion table 1 When multiple items are set in, the code is converted by selecting the code of the same code type as the code type before and / or after the code conversion, so multiple code systems are mixed. Data (character code) created by one conversion table 1
Can be converted at high speed into one code system data (character code) by one conversion process. With these, (1) without specifying which conversion table to use from the outside when the multiple code systems coexist, (2) conversion of multiple codes simultaneously in one code conversion process. (3) It has become possible to simultaneously extract character strings of a plurality of code systems from a large amount of data as one code system data in one process.

[Brief description of drawings]

FIG. 1 is a system configuration diagram of the present invention.

FIG. 2 is an operation explanatory diagram of the present invention.

FIG. 3 is a flowchart for creating a conversion table according to the present invention.

FIG. 4 is an example of a conversion table of the present invention.

FIG. 5 is a flowchart explaining the operation of the present invention.

FIG. 6 is a flowchart explaining another operation of the present invention.

[Explanation of symbols]

 1: Conversion table 2: Conversion means 3: Data 4: Data input device 5: Display device 6: Printing device 7: Input result processing program

Claims (2)

[Claims] 1. A conversion table for merging and setting two code conversion tables for converting a certain character code into another character code, and setting a code having a higher priority set in advance for duplicate codes. A character code conversion device, comprising: a conversion unit that converts an input character code in which a plurality of code systems are mixed into one code system by using the conversion table. 2. A method for merging and setting a plurality of code conversion tables for converting one character code into another character code.
If one conversion table and the input character code mixed with multiple code systems are converted to one code system using the conversion table and the code to be converted is duplicated, it is converted before or after. A character code conversion device comprising a conversion means for selecting and converting a code system.