JPH04150112A - Character code checking processor - Google Patents

Abstract

PURPOSE:To improve the reliability and to reduce the processing time by identifying whether a character code is a one-byte code or a two-byte code and retrieving whether or not the character code is stored in a character code storage section. CONSTITUTION:A shift code detection section 3 detects an undesired shift code by the check item of an input record and a code type identification section 4 identifies that the code to be checked is whether the code is a one-byte code or a two-byte code and applies a required processing. Then a character code retrieval control section 5 accesses a character code storage section 6 based on the checking mode, decides the result of retrieval and controls a pointer to check a succeeding code when the code is normal and informs the information to a result display section 7 when the code is in error. Thus, even an item in which a one-byte code system and a two-byte code system are present in mixture is checked, the information with high reliability is secured and the processing time is shortened.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a character code check processing device.

[Conventional technology]

In recent years, information processing devices have been increasingly used in sophisticated ways, and the amount of information they contain has also increased. Therefore, improving the reliability and shortening the processing time are important issues. For example, when updating information stored in an external storage device such as a database and checking whether there are any incorrect codes in the updated information, conventional methods detect shift codes when checking codes within the same item. Since there was no function to distinguish between 1-byte code and 2-byte code, it was impossible to check items in which 1-byte code and 2-byte code were mixed.

In addition, the character code storage unit that stores all 1-byte and 2-byte codes required a large memory capacity because the recording method was to arrange all codes for each character. .

[Problem to be solved by the invention]

However, due to the complexity of information processing and the increase in the amount of information in recent years, the conventional systems described above are no longer able to cope with this problem.

Information stored in external storage devices such as databases is checked to prevent incorrect information from entering, but character information cannot be checked for items that contain a mixture of 1-byte and 2-byte codes. There is a problem.

Another problem is that the processing time is long due to the large amount of information.

Regarding the character code storage section, there is a problem in that the storage capacity is also large due to the large number of codes.

[Means to solve the problem]

The character code check processing device of the present invention is a system that checks the validity of character codes of records input from an external medium and identifies codes that are not defined as characters, and provides information necessary for starting the system. a startup information control unit that controls the system based on the information; a shift code detection unit that detects unnecessary shift codes recorded in records; and a shift code detection unit that detects whether the character code to be checked is a 1-byte code or a 2-byte I code. a code type identification unit for identifying whether the character code is a code type, a character code storage unit storing each character code, and a character code search control unit for searching whether the input character code is stored in the character code storage unit; has.

Further, in the character code check processing device of the present invention,
The code type identification section is configured to identify the code type for each character of the input record.

Furthermore, in the character code check processing device of the present invention, the character code storage section has a 2-byte code table with a 3-layer 2-dimensional table.

〔Example〕

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the processing of the entire system, and FIG. 3 is an explanatory diagram showing the configuration of a character code storage section.

In the figure, 1 is an input record access section, 2 is a startup information control section, 3 is a shift code detection section, 4 is a code type identification section,
5 represents a character code search control section, and 6 represents a character code storage section.

The input record access unit 1 reads a file on an external medium (magnetic disk, magnetic tape, floppy disk, etc.) and processes the data. Startup information control unit 2
gives the user the information necessary to start this system, and controls the system accordingly. The necessary information is the code system (JIS-EBCIDIK), the number of effective bytes, and the output device designation. This information is transferred to the shift code detection section 3. Code type identification section 4. The result display unit 7 is notified and processing is performed based on this information.

The shift code detection unit 3 detects unnecessary shift codes in check items of input records.

The number of bytes of the shift code is taken out from the number of bytes at the beginning of the check item, and the checking process is performed by comparing it with the 1-byte shift code and the 2-byte shift code. For example, unnecessary shift codes include the second and subsequent shift codes when two or more of the same shift codes appear consecutively. If an unnecessary shift code is detected, the result display section 7
Notify.

The code type identification unit 4 indicates that the current code to be checked is 1.
It identifies whether it is a byte code or a 2-byte code and processes it. When the shift code detection unit 3 detects a 1-byte shift code, the check mode is set to 1 and 2.
When a bytecode is detected, the check mode is set to 2, and the code type identifying section 4 refers to the above check mode for identification.

The character code search control section 5 accesses the character code storage section 6 based on the check mode. When referring to the character code table, the subscripts of the array are manipulated to control the three-layer type of the two-dimensional table. The search result is determined, and if it is normal, the pointer is manipulated to check the next code. In the case of an error, the information is notified to the result display section 7.

The character code storage unit 6 stores an EBCIDIKI bytecode, an EBCIDIK2 bytecode, a JIS1 bytecode, and a JIS2 bytecode. The 2-byte code table is a three-layered two-dimensional table. (See Figure 3).

The result display section 7 receives error information from the shift code detection section 3 and character code search control section 5, and notifies the user. The console and printing device can be selected by the user.

Next, the operation of the above-mentioned character coat check processing device will be explained. Referring now to FIG. 2, a process 20 reads a file on an external medium (magnetic disk, magnetic tape, floppy disk, etc.). Regarding the check items of the read record, unnecessary shift codes are detected in the shift code check in process 21.

If the determination result in process 22 is an error, error information is notified to the result display unit 7. If the determination result in process 22 is normal, process 23 identifies whether the detected shift code is a 1-byte shift code or a 2-byte shift code, and performs a character search for each code.

In the case of a 1-byte shift code, the 1-hide table in the character code storage section 6 is referred to in step 24 to search for the corresponding character code.

In the case of a 2-byte shift code, the corresponding character code is searched by referring to the 2-byte table in step 25 in the same way as in the case of a 1-byte shift code.

A process 26 judges the above search results, and in the case of an error, notifies the result display section 7 of error information. If it is normal, add 1 to the pointer when the check mode is 1. When the check mode is 2, add 2 to the pointer, perform shift code check in process 21 until the number of valid bytes is reached, and then perform process 22. Repeat process 23.

Process 27 edits the error information and notifies the user via the console or printing device.

〔Effect of the invention〕

As explained above, according to the present invention, 1-byte code,
Since it is possible to check even items containing a mixture of double-byte codes, more reliable information can be secured. Furthermore, processing time can also be shortened.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram showing processing, and FIG. 3 is an explanatory diagram showing the table structure of a character code storage section. DESCRIPTION OF SYMBOLS 1... Input record access section, 2... Start-up information control section, 3... Shift code detection section, 4... Code type identification section, 5... Character code search control section, 6... Character code storage section.

Claims (1)

[Claims] 1. In a system that checks the validity of character codes of records input from an external medium and identifies codes that are not defined as characters, the system provides information necessary to start the system. A startup information control unit that controls the system based on the information, a shift code detection unit that detects unnecessary shift codes recorded in records, and identifies whether the character code to be checked is a 1-byte code or a 2-byte code. The present invention includes a code type identification section, a character code storage section storing each character code, and a character code search control section that searches whether the input character code is stored in the character code storage section. Characteristic character code check processing device. 2. The character code check processing device according to claim 1, wherein the code type identifying section identifies the code type for each character of the input record. 3. The character code check processing device according to claim 1 or 2, wherein the character code storage section has a 2-byte code table with a 3-layer two-dimensional table.