JP2728534B2 - Byte position identification code setting processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] In a computer system that processes Japanese data of a 2-byte code system, a byte position identification code setting method of Japanese data for improving the performance in input / output processing of Japanese data In order to provide a means for setting information for identifying whether it is the upper byte or the lower byte of the Japanese data at a high speed, the Japanese data set in the Japanese data area is The upper byte and lower byte of each character of Japanese data is obtained by subtracting the previous identification code from a certain value and the identification code setting area where the information for identifying the upper byte and lower byte of each character is set by a numerical identification code. And an identification code setting processing unit for sequentially generating the identification code of the lower byte and the identification code of the lower byte, and setting the identification code in the identification code setting area. I do.

[Industrial applications]

The present invention relates to a method for setting a byte position identification code of Japanese data in a computer system for processing Japanese data of a two-byte code system, with an improved performance in input / output processing of Japanese data.

[Conventional technology]

FIG. 4 is an explanatory diagram of a problem of the 2-byte code system, FIG. 5 is an example of the prior art, and FIG. 6 is an example of processing by the conventional technology.

Since Japanese characters including kanji have many character types, each character cannot be represented by one byte, and a two-byte code system that represents one Japanese character in two bytes is employed. In such a two-byte code system, both the upper byte (the first byte) and the lower byte (the second byte) of one character become a meaningful code, and the meaning is completely unknown individually.

For example, as shown in FIG. 4, when Japanese data is displayed on the display screen 40, when the edge of the screen comes between the upper byte and the lower byte of the Japanese character, so-called kanji tearing occurs. That is, in the example of FIG.
Will not be displayed properly.

In order to avoid this kanji tearing, it is necessary to always determine whether the edge of the screen is after the upper byte or the lower byte each time the Japanese data is edited. If it did, the process would take a long time.

Therefore, conventionally, as shown in FIG. 5, an identification flag portion for identifying the first byte or the second byte of each Japanese data corresponding to the Japanese data area 11 in which the Japanese data is set. For example, when the identification flag is OFF, the upper byte (first byte) is indicated, and when the identification flag is ON, the lower byte (second byte) is indicated. By judging ON / OFF of this identification flag, it becomes possible to immediately judge whether or not crying of Chinese characters occurs as shown in FIG.

The process of setting the identification flag in the identification flag unit 50 shown in FIG. 5 is performed, for example, as shown in FIG.

Let the loop variable C be 1 to the length (number of bytes) of Japanese data. The process up to is repeated.

The current position of the Japanese data for which the identification flag is set is 1
It is determined whether or not the byte is the byte. If the byte is the first byte, the process is executed. If not, the process is executed.

Turn off the identification flag.

Turn on the identification flag.

The processing from the beginning of the loop is repeated until the processing for the length of the Japanese data is completed.

[Problems to be solved by the invention]

In the conventional method as shown in FIG. 5, information for identifying the first byte or the second byte of Japanese data is set by a bit (flag), so that a judgment statement as shown in FIG. Required, and the execution performance is poor.
That is, a judgment statement as shown in FIG. At the machine language instruction level, it is expanded into a comparison instruction and a branch instruction, and the dynamic step at the time of execution increases.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a means for setting information for identifying the upper byte or the lower byte of Japanese data at high speed.

[Means for solving the problem]

 FIG. 1 is a diagram illustrating the principle of the present invention.

In FIG. 1, reference numeral 10 denotes a data processing device including a CPU and a memory, 11 denotes a Japanese data area in which Japanese data is stored, and 12 denotes information for identifying an upper byte or a lower byte of the Japanese data. Identification code setting area, 13
Denotes an identification code setting processing unit that performs an identification code setting process on the identification code setting area 12.

In the identification code setting area 12, information for identifying the upper byte and the lower byte of each character is set by a numerical identification code corresponding to the Japanese data set in the Japanese data area 11. ing.

The identification code setting processing unit 13 subtracts the previous identification code from a certain value to sequentially generate an identification code of the upper byte and an identification code of the lower byte of each character of the Japanese data, and identifies each identification code. A process for setting in the identification code setting area 12 is performed.

[Action]

Since the information for identifying whether the upper byte or the lower byte of the Japanese data is a numeric identification code, the identification code setting processing unit 13 does not determine whether the byte is the first byte or the second byte. Identification codes can be sequentially generated only by processing, and information can be set at high speed.

For example, the identification code of the upper byte is “1”, and the identification code of the lower byte is “2”. When the identification code of the upper byte is subtracted from a certain value “3”, the identification code of the lower byte is obtained, and when the identification code of the lower byte is subtracted, the identification code of the upper byte is obtained. This makes it possible to set the identification codes “1” and “2” alternately without using a judgment statement.

〔Example〕

FIG. 2 shows an example of an application system of the present invention, and FIG. 3 shows an example of an identification code setting process according to the embodiment of the present invention.

The present invention is applied to, for example, a system as shown in FIG. In the figure, those having the same reference numerals as those in FIG. 1 correspond to those shown in FIG. 1, wherein 20 is a terminal device having a display, 21 is a terminal input / output unit, and 22 is an application processing unit for processing Japanese data. Represents

The terminal input / output unit 21 inputs / outputs Japanese data to / from the terminal device 20 in response to a request from the application processing unit 22.
Japanese data to be input / output is stored in a Japanese data area 11 prepared as a buffer. An identification code setting area 12 is prepared corresponding to the Japanese data area 11,
The identification code setting processing unit 13 sets an identification code of a numerical value for identifying whether the upper byte or the lower byte of the Japanese data.

After the identification code setting processing by the identification code setting processing unit 13, the terminal input / output unit 21 uses the setting information in the identification code setting area 12 to perform screen display control and error checking of Japanese data.

The processing performed by the identification code setting processing unit 13 is, for example, a processing as shown in FIG. Hereinafter, description will be made in accordance with the flowchart shown in FIG.

The initial value of the variable A of the identification code is set to “1”.

The loop variable C is set to 1 to the length (number of bytes) of the Japanese data, and the processing up to is repeated.

The value of the variable A is set in the C byte of the identification code setting area 12.

The value obtained by subtracting the variable A from the constant 3 is set as the variable A.

The processing from the beginning of the loop is repeated until the processing for the length of the Japanese data is completed.

By the above processing, 1 is set in the first byte of the identification code setting area 12, 2 is set in the second byte, 1 is set in the third byte, and 2 is set in the fourth byte. , ……
Thus, the identification code indicating the upper byte and the lower byte is set alternately.

〔The invention's effect〕

As described above, according to the present invention, by handling information for distinguishing the upper byte and the lower byte by a numerical value, it is possible to set information using a calculation formula, and a judgment statement is not required. Is improved.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the principle of the present invention, FIG. 2 is an example of an application system of the present invention, FIG. 3 is an example of an identification code setting process according to an embodiment of the present invention, and FIG. FIG. 5 shows an example of the prior art, and FIG. 6 shows an example of processing according to the prior art. In the figure, 10 is a data processing device, 11 is a Japanese data area, 12 is an identification code setting area, and 13 is an identification code setting processing unit.

Claims (1)

(57) [Claims] In a computer system for processing Japanese data of a two-byte code system, an upper byte and a lower byte of each character are identified according to Japanese data set in a Japanese data area (11). The identification code setting area (12) in which the information is set by a numerical identification code, and the identification code of the upper byte and lower byte of each character of Japanese data by subtracting the previous identification code from a certain value And an identification code setting processing section (13) for sequentially generating codes and setting the identification code in the identification code setting area (12).