JP2000047985A - Device and method for checking command parameter sentence structure and record medium recording command parameter sentence structure analytic program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make efficiently performable the check processing of a command parameter with high quality without complicating the check processing of the command parameter even when the command parameter is added or corrected. SOLUTION: Concerning this checking method, a parameter extracting means 21 segments plural parameters with a space as a partition from a parameter stream designated to a command inputted to an input device 1 and stores them in an input parameter storage means 22 in the format of a bit stream turning on bits respectively corresponding to the plural parameters and it is checked whether all the bit streams coincident with the bit stream stored in the input parameter storage means 22 are stored in a combination storage means 24 for previously storing the combination pattern of parameters as bit streams or not. When the coincident bit stream is found out, it is judged that the sentence structure of the designated parameter is correct, it is reported to a command executing means 25 and the command is executed. When the coincident bit stream can not be found out, it is judged that the sentence structure of the designated parameter is wrong, and it is outputted to an output device 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a command parameter syntax checking apparatus, a command parameter syntax checking method, and a command parameter syntax checking method for checking whether a combination of a plurality of parameters specified in a command input from an input device to a computer is correct. The present invention relates to a recording medium on which a program is recorded.

[0002]

2. Description of the Related Art A conventional command parsing system includes a parameter extracting means for extracting a character string from an input command character string by separating a blank space, and whether or not the parameters extracted by the parameter extracting means are in a specifiable state. And a parameter inspecting means for inspecting whether or not the parameter is satisfied.

[0003] This parameter checking means uses a parameter 1
Inspections are repeatedly performed to determine whether each parameter is a parameter that can be specified or whether the combination of parameters is correct.

[0004]

However, the conventional command parsing system has a problem that the program logic for checking a combination of parameters is complicated, and the checking cannot be performed efficiently. There is.

Further, every time a parameter is added or corrected, the program logic for inspection must be remodeled. As a result of the program logic becoming more complicated, the probability of occurrence of a bug increases. There is a problem.

An object of the present invention is to enable a command parameter inspection process to be performed efficiently.

It is another object of the present invention to provide a high-quality command parameter inspection process without complicating the process even if a command parameter is added or modified.

[0008]

A first command parameter syntax checking apparatus according to the present invention comprises: a combination storage means for storing in advance all combinations of a plurality of parameters included in a parameter sequence specified in a command; and an input device. Combination checking means for checking whether or not a combination of a plurality of parameters included in a parameter string specified in a command input from is stored in the combination storage means, thereby checking the validity of the syntax of the parameter string. It is characterized by having.

A second command parameter syntax checking device according to the present invention assigns each of a plurality of parameters included in a parameter sequence specified in a command to different bits, and turns on a bit corresponding to each individual parameter. A combination storage unit that expresses the parameter sequence with a bit sequence to be stored in advance, and a parameter sequence specified in a command input from an input device, and extracts the parameter sequence from the bit sequence stored in the combination storage unit. Parameter extraction means for converting to a bit string of a similar format,
Combination checking means for checking whether the bit string converted by the parameter extracting means is stored in the combination storing means to check the validity of the syntax of the parameter string.

[0010] A third command parameter syntax checking apparatus of the present invention expresses each of a plurality of parameters included in a parameter string specified in a command, and corresponds to a bit string in which different bits are turned on for each parameter. A combination storage means for storing attribute information indicating whether the specification of a parameter is indispensable or omissible, and a parameter string specified in a command input from the input device, and extracting the extracted parameter string into the parameter string Assigning each of a plurality of parameters included in a different bit, parameter extraction means for converting to a bit string to turn on the corresponding bit when each parameter is present, among the bit strings stored in the combination storage means, A bit string to which the attribute information indicating that the specification of the parameter is indispensable; By comparing the bit string obtained by converting the parameter string data extracting means it has extracted, characterized by comprising a combination checking means for checking the validity of the syntax of the parameter sequence.

In a fourth command parameter syntax checking apparatus according to the present invention, in the third command parameter syntax checking apparatus, the combination storage means stores the plurality of bit strings in a hierarchically connected manner, However, of the plurality of bit strings stored hierarchically connected to the combination storage means, the parameter extraction means traces a bit string to which the attribute information indicating that the designation of a parameter is essential is attached, The validity of the syntax of the parameter sequence is checked by sequentially comparing the extracted parameter sequence with the converted bit sequence.

A fifth command parameter syntax checking apparatus according to the present invention, in any one of the first to fourth command parameter syntax checking apparatuses, wherein the combination checking means checks whether the syntax of the parameter string specified in the command is correct. If the correctness of the syntax of the parameter string is not confirmed, the command execution means is caused to execute the command. It is characterized by the following.

According to a first command parameter syntax checking method of the present invention, a plurality of combinations of parameters included in a parameter string specified in a command input from an input device are included in a parameter string specified in a command. A combination checking step of checking whether or not all combinations of the parameters are stored in combination storage means stored in advance to check the validity of the syntax of the parameter string.

According to a second command parameter syntax checking method of the present invention, a parameter string specified in a command input from an input device is extracted, and the plurality of parameter strings included in the parameter string specified in the command are extracted. A bit string in the same format as the bit string stored in the combination storage means, in which each parameter is assigned to a different bit, and the parameter string is represented by a bit string that turns on a corresponding bit when an individual parameter is present and is stored in advance. And a combination checking step of checking whether the bit string converted in the parameter extracting step is stored in the combination storage means to check the correctness of the syntax of the parameter string. Features.

According to a third command parameter syntax checking method of the present invention, a parameter sequence specified in a command input from an input device is extracted, and the extracted parameter sequence is extracted from each of a plurality of parameters included in the parameter sequence. Is assigned to different bits, and a parameter extraction step of converting a bit string that turns on a corresponding bit when an individual parameter is present, and expressing each of a plurality of parameters included in the parameter string specified in the command, A bit string in which a different bit is turned on for each bit is attached with attribute information indicating whether the specification of the corresponding parameter is mandatory or can be omitted. Of the bit strings stored in the combination storage means, the parameter designation is mandatory. A bit string to which the attribute information indicating that there is is attached; By comparing the bit string obtained by converting the parameter strings extracted you are, characterized in that it comprises a combination inspection step for inspecting the validity of the syntax of the parameter sequence.

According to a fourth command parameter syntax checking method of the present invention, in the third command parameter syntax checking method, the combination checking step is performed by the plurality of bit strings stored hierarchically connected to the combination storage means. By tracing the bit string to which the attribute information indicating that the parameter specification is essential is attached, and sequentially comparing the parameter string extracted by the parameter extracting means with the converted bit string, the syntax of the parameter string is obtained. It is characterized by checking the validity of

In a fifth command parameter syntax checking method according to the present invention, in any one of the first to fourth command parameter syntax checking methods, the combination checking step may include checking a validity of a syntax of a parameter string specified in the command. If the correctness of the syntax of the parameter string is not confirmed, the command is output to the output device to the effect that the syntax of the parameter string is invalid. I do.

A first recording medium according to the present invention is characterized by recording a program for causing a computer to execute each step in any one of the first to fifth command parameter syntax checking methods.

A first recording medium group according to the present invention is characterized in that the program recorded on the first recording medium is divided into a plurality of portions, and the plurality of portions are respectively recorded on a plurality of recording media. And

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, according to a first embodiment of the present invention, a computer 2 which operates under program control, and an input such as a keyboard for inputting a command including a parameter string which is connected to the computer 2 It comprises a device 1 and an output device 3 such as a display device or a printing device.

As a modification of this embodiment and other embodiments described later, the computer 2 is connected to a recording medium 4 such as a magnetic disk device or a semiconductor memory via a signal line, and the computer 2 The following processing may be executed by a program loaded from the recording medium 4 via a signal line.

The computer 2 comprises: a parameter extracting means 21;
Input parameter storage means 22 and combination inspection means 23
, A combination storage means 24, and a command execution means 25.

The combination storage means 24 stores in advance a combination pattern of all parameters in a bit string. The individual parameters are assigned to each bit of the bit string, and if the corresponding parameter is designated, the bit is turned on, and if not, the bit is turned off, and all the combination patterns are stored.

The parameter extracting means 21 cuts out a plurality of parameters from the parameter string specified in the command input to the input device 1 with a space as a delimiter, and stores them in the input parameter storing means 22.

The input parameter storage means 22 has the same format as the combination storage means 24. A bit string in which bits corresponding to each of the plurality of parameters extracted by the parameter extracting means 21 are turned on is stored.

The syntax checking means 23 checks whether a bit string that matches the bit string stored in the input parameter storage means 22 is stored in the combination storage means 24. If a matching bit string is found, it is determined that the syntax of the designated parameter is correct, and the command execution means 25 is notified of the fact and causes the command to be executed. If a matching bit string cannot be found, it is determined that the syntax of the specified parameter is incorrect, and that fact is output to the output device 3.

Next, a first embodiment of the present invention will be described with reference to FIGS.
The overall operation of the embodiment will be described in detail.

When a command including a parameter string is input to the input device 1, the parameter extracting means 21 first removes the command from the command string, generates a parameter string, and extracts a character string from the parameter string by separating spaces ( Step A1 in FIG. 2). Next, the parameter extracting means 21
Determines whether the extracted character string is correct as a parameter by inspecting the parameter name and the designated value (step A2). If it is determined that the character string is correct, the character string (parameter) is stored in the input parameter storage unit 22. Since the input parameter storage means 22 is in the form of a bit string, the parameter is stored by turning on the bit corresponding to the parameter (step A3). On the other hand, step A2
If it is determined that the parameter is not correct, a message to that effect is displayed on the output device 3 (step A8).

The parameter extracting means 21 similarly performs
All parameters are extracted from the parameter sequence and stored in the input parameter storage means 22 (step A4). In step A4, when all the parameters have been extracted, the input parameter extracting unit 22 turns on the bits corresponding to the extracted parameters and turns off the other bits.

Next, the combination checking means 23 includes a plurality of bit strings stored in the combination storage means 24 in advance.
It is checked whether there is a bit string that matches the bit string stored in the input parameter storage means 22 (steps A5 and A6). If there is a matching bit string, it is determined that the syntax of the designated parameter string is correct (step A).
7), and notifies the command execution means 3 to execute the command. On the other hand, if there is no matching bit string, it is determined that the syntax of the designated parameter string is incorrect, and a message indicating this is output to the output device 3 (step A8).

Next, a specific example will be described.

For example, if there is a command having a syntax as shown in FIG.
Are stored.

When the command shown in FIG. 3 is input from the input device 1, the parameter extracting means 21 extracts the parameter string "ABD" therefrom, and further separates the parameter "A" from the parameter string by separating spaces. (Step A1), confirm that the parameter is correct, and turn on the bit corresponding to "A" in the input parameter storage means 22. (Steps A2 and A3). Similarly, the parameters "B" and "D" are cut out from the parameter string, and the parameters are confirmed to be correct, and the corresponding bit of the input parameter storage means 22 is turned ON. When the extraction of all parameters from the parameter sequence is completed, the input parameter storage means 22 becomes as shown in FIG. 5 (step A4).

The combination checking means 23 stores a bit string that matches the bit string in which the “A”, “B”, and “D” bits stored in the input parameter storage means 22 are ON in the combination storage means 24. Search (steps A5 and A6). In this case, since the bit string in which the bits "A", "B", and "D" are ON is registered in the combination storage means 24, the search succeeds (step A7).

In the first embodiment of the present invention, an extremely simple process of checking whether a bit sequence corresponding to an input parameter sequence matches a bit sequence corresponding to a preset parameter sequence is efficiently performed by an extremely simple process. This has the effect that the command parameter syntax can be checked.

Even if a parameter is added or the command parameter syntax is modified, the part to be remodeled is closed in the combination storage means 24 and the parameter extraction means 21 and the combination inspection means 23 do not need to be remodeled. This has the effect that the inspection process can be performed with high quality without complicating the inspection process.

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

Referring to FIG. 6, according to a second embodiment of the present invention, the computer 5 is replaced with a combination checking means instead of the combination checking means 23 of the computer 2 of the first embodiment shown in FIG. 26, a combination storage means 27 is provided instead of the combination storage means 24.

The combination storage means 27 stores, for each parameter, an attribute of the parameter (indispensable / can be omitted) and a bit string in which a bit corresponding to the parameter is turned ON, and the bit strings are connected so as to indicate a syntax. Have been. Combination storage means 27 corresponding to the syntax of FIG.
Is shown in FIG.

The combination checking means 26 searches the combination storage means 27 for a connected bit string having the same configuration as the bit string stored in the input parameter storage means 22.

Next, the operation of the second embodiment of the present invention will be described in detail with reference to FIGS.

The operation of the parameter extracting means 21 and the parameter storing means 22 in the present embodiment shown in steps A1-A4 in FIG. 7 is the same as that of the means 21 and 22 in the first embodiment shown in FIG. Since the operation is the same as the operation, the description is omitted. In the first embodiment, since the combination storage means 24 previously stores a bit string indicating a combination of parameters, the combination checking means 23 uses the bit string stored in the input parameter storage means 22 to store the combination storage means 2.
4 was searched.

The combination storage means 27 of the present embodiment
It is configured to express the syntax of a parameter by combining bit strings. Therefore, the combination inspection means 26
The connected bit strings in the combination storage means 27 are sequentially inspected.

When all the parameters are converted into bits and stored in the input parameter storage unit 22, the combination checking unit 26 turns on the first bit string of the combination storage unit 27.
It is checked whether or not the bit indicated by is turned on in the input parameter storage means 22 as well. That is, the first bit string of the combination storage means 27 and the input parameter storage means 2
The bit AND of 2 is taken (step B1). When the result of the bit AND is not 0, that is, when the target parameter is specified, the combination checking unit 26 performs the same processing on the bit string connected next to the combination storage unit 27. (Step B4). On the other hand, if the result of the bit AND is 0, that is, if the target parameter is not specified, the attribute of the parameter is checked (step B3). When the attribute of the parameter stored in the combination storage unit 27 is “can be omitted”, the combination checking unit 26 checks the bit string connected next because the parameter may be omitted. (Step B)
4). Conversely, if the attribute of the parameter stored in the combination storage means 27 is "essential", the parameter is not specified even though it is a parameter that cannot be omitted. Is determined to be incorrect, and a message to that effect is output to the output device 3.
(Step A8).

When there is no longer any bit string connected to the bit string stored in the combination storage means 27, the combination inspection means 26
It is checked whether all the bit strings stored as ON in 2 have been checked (step B6). If all have been checked, it is determined that the syntax of the specified parameter string is correct (step A7), and the command execution means 2
5 to execute the command. On the other hand, if there is any unchecked bit string, it is determined that the syntax of the specified parameter string is incorrect, and a message indicating that is output to the output device 3 (step A8).

Next, a specific example will be described.

For example, assuming that there is a command having a syntax as shown in FIG. 3, a bit string shown in FIG.

If the parameter string cut out from the command input from the input device 1 is "AB",
When step A4 is completed, the bit string shown in FIG. 9 is stored in the input parameter storage unit 22.

The combination checking means 26 checks whether the "A" bit turned on in the first bit string of the combination storage means 27 is also turned on in the bit string stored in the input parameter storage means 22 (step). B
1). The combination checking unit 26 determines that the bit “A” of the bit string stored in the input parameter storage unit 22 is O
When it is confirmed that the number is N, the combination storage means 2
It is checked whether the bit "B" which is turned on in the bit string connected next in 7 is also turned on in the bit string stored in the input parameter storage means 22 (steps B4 and B1). When the combination checking unit 26 confirms that the bit “B” of the bit string stored in the input parameter storage unit 22 is ON, the combination inspection unit 26 turns ON the bit string connected next in the combination storage unit 27. It is checked whether the "D" bit is ON in the bit string stored in the input parameter storage means 22 (steps B4 and B1). When checking that the bit “D” of the bit string stored in the input parameter storage unit 22 is not ON, the combination checking unit 26 checks the attribute of the parameter “D” (step B3). The attribute of the parameter “D” is “can be omitted”, and the “D” bit of the bit string stored in the input parameter storage unit 22 does not have to be ON. When the combination checking unit 26 confirms that there is no bit string in which the bit of “D” is connected to the bit string of ON in the combination storage unit 27 (step B5),
It is checked whether all the bits "A" and "B" stored as ON in the bit string stored in the input parameter storage means 22 have been checked (step B6). It is determined that the syntax of the column is correct (step A7), and the fact is notified to the command execution means 25 to execute the command.

In the second embodiment of the present invention, the attribute (indispensable / omissible) of the parameter corresponding to each bit string stored in the combination storage means 27 is stored together, and the connected bit strings are sequentially inspected. By doing so, the syntax of the parameter string is checked. Therefore, there is a new effect that the storage capacity can be reduced as compared with the first embodiment in which all combinations of bit strings are stored in advance. This effect is prominent when parameters are added. FIG. 10 shows the combination storage means 24 and the combination storage means 27 when one omissible parameter is added to the command shown in FIG. In this case, the storage capacity of the combination storage means 24 is doubled before adding the parameter, but in the case of the combination storage means 27, the capacity is increased by one parameter.

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. Referring to FIG.
In the third embodiment of the present invention, the computer 6 is a combination checking unit 2 of the computer 5 of the second embodiment shown in FIG.
6 is provided with a combination inspection unit 28 instead of the combination storage unit 27 and a combination storage unit 29 instead of the combination storage unit 27.

The combination storage means 29 comprises a plurality of nodes and a plurality of syntax bit string tables. Each node is connected to the syntax bit string table and connected to a node indicating the next parameter to be parsed. And a link to a node indicating a branch of the syntax and an attribute (required / omissible) of a syntax bit string table linked to the node are stored, and each node is linked to indicate a syntax. . FIG. 13 shows an example of the combination storage means 29.

The combination checking means 28 searches whether or not there is a connected bit string having the same configuration as the bit string stored in the input parameter storage means 22 in the combination storage means 29.

Next, the operation of the third embodiment of the present invention will be described in detail with reference to FIGS.

The parameter extracting means 2 according to the third embodiment of the present invention, shown by steps A1-A4 in FIG.
1 and the operation of the parameter storage means 22 are the same as those of the respective means 21 and 22 of the first embodiment shown in FIG. In the second embodiment, since the combination storage unit 27 stores the syntax of the parameter by combining the bit strings, the combination check unit 26 sequentially checks the connected bit strings in the combination storage unit 27.

The combination storage means 29 according to the third embodiment of the present invention is configured to express the syntax of a parameter by a plurality of nodes and a plurality of syntax bit string tables. Therefore, the combination checking unit 28 sequentially checks the syntax bit string table connected to the node in the combination storage unit 29.

After all the parameters have been converted into bits and stored in the input parameter storage means 22, the combination checking means 28 uses the bit string of the syntax bit string table connected to the first node of the combination storage means 29 to generate O.
It is checked whether the bit set to N is also turned on in the input parameter storage means 22. That is, the syntax bit string table connected to the first node of the combination storage unit 29 and the bit AND of the input parameter storage unit 22 are obtained (step C1). When the result of the bit AND is not 0, that is, when the target parameter is specified, the combination checking unit 28 performs the same processing on the node connected next to the combination storage unit 29. (Step C4). On the other hand, bit A
If the result of the ND is 0, that is, if the target parameter is not specified, the attribute of the parameter is checked (step C3). The combination inspection means 28
If the attribute of the parameter stored in the combination storage means 29 is "can be omitted", the parameter is a parameter that may be omitted, and the next connected node is checked (step C4). . Conversely, the attribute of the parameter stored in the combination storage means 29 is "
If "required", it is checked whether the target node has a connection to the tributary node (step C8).

If there is no longer any node indicating the next parameter to be analyzed in the combination storage means 29 stored in the combination storage means 29, the combination checking means 28 checks all the bit strings stored in the input parameter storage means 22 as ON. It is checked whether it has been checked (step C6). If all are checked, it is determined that the syntax of the designated parameter string is correct (step A7), and the fact is notified to the command executing means 25 to execute the command. On the other hand, if any unchecked bit string remains, the node that has been traced is returned (step C7), and it is checked whether there is a connection to the tributary node (step C8). When the returned node is connected to the tributary node, the syntax bit string table connected to the tributary node is checked (step C1). If the returned node has no connection to the tributary node, it is checked whether the current target node is the first node that has started checking (step C).
9). If the target node is not the first node that has started the inspection, the node that has been traced so far is returned (step C7), and the inspection is performed again to make it a tributary node. If it is the first node that has started the check, it is determined that the syntax of the specified parameter string is incorrect, and a message indicating this is output to the output device 3 (step A8).

Next, a specific example will be described.

For example, consider the case of a command having a syntax and combination storage means 29 as shown in FIG.

Assuming that the parameter sequence cut out from the command input from the input device 1 is “AED”, the bit sequence shown in FIG. 14 is stored in the input parameter storage means 22 when step A4 is completed. .

The combination checking means 28 determines whether the "A" bit which is ON in the syntax bit string table connected to the first node of the combination storage means 29 is stored in the input parameter storage means 22. It is checked whether it is ON (step C1). When the combination checking unit 28 confirms that the bit “A” of the bit string stored in the input parameter storage unit 22 is ON, the syntax of the next connected node in the combination storage unit 29 is checked. It is checked whether the “B” bit that is ON in the bit string table is also ON in the bit string stored in the input parameter storage unit 22. The combination checking unit 28 checks the bit string stored in the input parameter storage unit 22 for “
Since the bit of B "is not turned on, it is turned on in the next bit string of the syntax bit string table."
It is checked whether the bit "C" is also ON in the bit string stored in the input parameter storage means 22 (steps C4 and C1). C "
Is not ON, the attribute of the node is checked (step C3). Since the attribute of the node is “essential”, it is checked whether or not the node currently being inspected has a tributary node (step C8). Since the node has a connection to the tributary node, the bit of “D” that is ON in the syntax bit string table connected to the node is stored in the input parameter storage unit 22 with the inspection target node as the tributary node. It is checked whether or not the bit string is ON (step C1). When the combination checking unit 28 confirms that the bit “D” of the bit string stored in the input parameter storage unit 22 is ON, the syntax of the next connected node in the combination storage unit 29 is checked. It is checked whether the “E” bit that is ON in the bit string table is also ON in the bit string stored in the input parameter storage unit 22. The combination checking means 28 outputs the bit string “E” stored in the input parameter storage means 22.
Is turned on, and when it is confirmed that there is no next connected node in the combination storage means 29 (step C5), the input parameter storage means 2
It is checked whether all the bits "A", "E" and "D" stored as ON in the bit string stored in 2 have been checked (step C6). Since all the checks have been completed, it is determined that the syntax of the specified parameter string is correct (step A7), and the command execution means 25
To execute the command.

In the third embodiment of the present invention, a node corresponding to each syntax bit string table is provided in advance in the combination storage means 29, and the node is connected to the syntax bit string table. By connecting the spaces so as to indicate the syntax, the syntax check of the parameter string is performed by sequentially checking the syntax bit string table linked to the node. A node is provided in the syntax bit string table, and since there is a connection from the node to the syntax bit string table, if there is a partially identical syntax parameter configuration, one syntax bit string table is prepared.
It is only necessary for each node to have a connection to this syntax table, and there is a new effect that the storage capacity can be reduced. This effect is particularly noticeable when the syntax is complicated.

[0065]

As described above, according to the present invention, the inspection processing of the command parameters can be performed efficiently, and the inspection processing of the command parameters is not complicated even if the command parameters are added or corrected. Has the effect of being able to perform with good quality.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the first exemplary embodiment of the present invention.

FIG. 3 is a diagram illustrating an example of a command syntax according to the first embodiment of the present invention.

FIG. 4 is a diagram illustrating an example of a structure of a combination storage unit 24 according to the first embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of an operation of the combination inspection unit 23 according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing another embodiment of the present invention.

FIG. 7 is a flowchart showing an operation of another embodiment of the present invention.

FIG. 8 is a diagram showing an example of a structure of a combination storage unit 27 according to another embodiment of the present invention.

FIG. 9 is a diagram showing an example of the operation of the combination inspection means 26 according to another embodiment of the present invention.

FIG. 10 is a diagram for explaining an effect of another embodiment of the present invention.

FIG. 11 is a block diagram showing a third embodiment of the present invention.

FIG. 12 is a flowchart showing an operation of the third exemplary embodiment of the present invention.

FIG. 13 is a diagram illustrating an example of a structure of a combination storage unit 29 according to the third embodiment of the present invention.

FIG. 14 is a diagram illustrating an example of an operation of a combination inspection unit according to the third embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 input device 2 computer 3 output device 4 recording medium 5 computer 21 parameter extraction means 22 input parameter storage means 23 combination inspection means 24 combination storage means 25 command execution means 26 combination inspection means 27 combination storage means 28 combination inspection means 29 combination storage means

Claims (12)

[Claims] A combination storage means for storing in advance all combinations of a plurality of parameters included in a parameter string specified in a command, and a plurality of parameters included in a parameter string specified in a command input from an input device. And a combination checking means for checking whether the syntax of the parameter string is correct by judging whether the combination is stored in the combination storage means. 2. A method according to claim 1, wherein each of a plurality of parameters included in a parameter string specified in the command is assigned to a different bit, and the parameter string is represented by a bit string that turns on a corresponding bit when an individual parameter exists. Combination storage means for storing in advance, and parameter extraction means for extracting a parameter string specified in a command input from the input device and converting the parameter string into a bit string having the same format as the bit string stored in the combination storage means And a combination checking means for checking whether the bit string converted by the parameter extracting means is stored in the combination storing means to check the validity of the syntax of the parameter string. Syntax checker. 3. Expressing each of a plurality of parameters included in a parameter string specified in a command, and indicating in a bit string in which different bits are turned on for each parameter whether the specification of the corresponding parameter is mandatory or omissible. Combination storage means for storing attribute information attached thereto; extracting a parameter sequence specified in a command input from the input device; converting the extracted parameter sequence into a plurality of bits each including a plurality of parameters included in the parameter sequence; Parameter extracting means for converting a bit string to turn on a corresponding bit when an individual parameter is present, and indicating that the designation of a parameter is indispensable among the bit strings stored in the combination storing means. A bit string to which attribute information has been added and a bit string obtained by converting the parameter string extracted by the parameter extracting means. By comparing the preparative column,
A command parameter syntax checking device comprising combination checking means for checking the validity of the syntax of the parameter string. 4. The combination storage means stores the plurality of bit strings in a hierarchical connection, and the combination inspection means stores the plurality of bit strings in a hierarchical connection in the combination storage means. By tracing a bit string to which the attribute information indicating that parameter designation is essential is added, and sequentially comparing the parameter string extracted by the parameter extracting means with the converted bit string, the syntax of the parameter string is 4. The command parameter syntax checking device according to claim 3, wherein the command parameter syntax checking device checks validity. 5. The combination checking means, when confirming the validity of the syntax of the parameter string specified in the command, causes the command execution means to execute the command, and confirms the validity of the syntax of the parameter string. 5. The command parameter syntax checking device according to claim 1, wherein, when the command string syntax cannot be obtained, the fact that the syntax of the parameter string is invalid is output to an output device. 6. A combination of a plurality of parameters included in a parameter sequence specified in a command input from an input device, wherein all combinations of a plurality of parameters included in a parameter sequence specified in a command are stored in advance. A command parameter syntax checking method, comprising: a combination checking step of checking whether or not the parameter string is correct by determining whether the parameter string is stored in a storage unit. 7. A parameter string specified in a command input from an input device is extracted, and the parameter string is assigned to each of a plurality of parameters included in the parameter string specified in the command, and each parameter is assigned to a different bit. A parameter extraction step of expressing the parameter string with a bit string that turns on a corresponding bit when a parameter is present and converting the parameter string into a bit string of the same format as a bit string stored in a combination storage unit that stores the parameter string in advance; A combination checking step of checking whether the bit string converted in step is stored in the combination storage means to check the validity of the syntax of the parameter string. 8. A parameter sequence specified in a command input from an input device is extracted, and the extracted parameter sequence is assigned to different bits of a plurality of parameters included in the parameter sequence. A parameter extraction step of converting a corresponding bit into a bit string that turns on the corresponding bit, and expressing each of a plurality of parameters included in the parameter string specified in the command into a bit string in which different bits are turned on for each parameter. Of the bit strings stored in the combination storage means for storing the attribute information indicating whether the specification of the corresponding parameter is indispensable or omissible, the attribute information indicating that the specification of the parameter is indispensable is added. A bit string and a bit string obtained by converting the parameter string extracted in the parameter extracting step. By comparison, the command parameter syntax checking method characterized by including the combinations inspection step for inspecting the validity of the syntax of the parameter sequence. 9. The combination checking step includes the step of, among the plurality of bit strings stored hierarchically connected to the combination storage means, a bit string to which the attribute information indicating that the designation of a parameter is indispensable is added. 9. The command parameter syntax checking method according to claim 8, wherein the validity of the syntax of the parameter string is checked by sequentially comparing the parameter string extracted by the parameter extracting means with the converted bit string. . 10. The combination checking step, wherein when the syntax of the parameter string specified in the command is confirmed, the command is executed, and when the syntax of the parameter string cannot be confirmed. 10. The command parameter syntax checking method according to claim 6, further comprising the step of outputting to the output device that the syntax of the parameter string is invalid. 11. A recording medium on which is recorded a program for causing a computer to execute each step according to claim 6. Description: 12. A recording medium group, wherein the program recorded on the recording medium according to claim 11 is divided into a plurality of portions, and the plurality of portions are respectively recorded on a plurality of recording media.