KR20030018720A - Method for generating source code browser for software maintenance and system therefor - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

It is about automatic generation of source code browser for software maintenance.

2. Technical problem to be solved by the invention

In addition to highlighting and displaying the source code to the user, it also provides a hyper function for the information of user-defined variables, so that the user can easily understand the program and easily distinguish the beginning and end of the source code block. Search and display in real time so that you can visually understand the program.

3. Summary of the Solution of the Invention

A first step of compiling and translating the source code and extracting file and function information necessary for generating the source code browser, a second step of parsing the source code, and extracting a keyword from the parsed source code A third step of highlighting, a fourth step of extracting and highlighting comments from the parsed source code, and a global variable / macro / data structure of the source code and the global variable / macro based on the extracted file and function information And a fifth step of generating a hyperlink between the information corresponding to each of the data structures and a sixth step of analyzing the block structure of the source code based on the starting point of the block input from the user.

4. Important uses of the invention

Used in source code browser for software maintenance.

Description

METHOD FOR GENERATING SOURCE CODE BROWSER FOR SOFTWARE MAINTENANCE AND SYSTEM THEREFOR}

The present invention relates to a method for automatically generating a source code browser for software maintenance. In particular, when a source program written in COBOL, C, C ++, JAVA, etc. is analyzed by a document browser, keywords or special characters of a control statement are analyzed. In addition to visualizing the representation of the program, the document browser provides a hyperfunction for declarations of user-defined variables, global variables, macros, and other data structures. A method and system and a recording medium having recorded thereon a program for realizing the method.

In the prior art, the document browser (editor) for software maintenance only provides a highlighting function for the source code, and according to the prior art, in order to find a user-defined variable or data structure, the corresponding file is edited. There is an inconvenience to open and look for everything.

In addition, the conventional document browser (editor) only shows the block of the source code as it is, it is inconvenient to analyze the source code manually to check where the block is started and where it ends.

The conventional method of displaying a program structure (Application No. 10-1997-0057879) is a method of displaying a general program structure (nested loop or hierarchical structure) on a source code screen. The problem could not be solved.

Accordingly, the present invention has been made to solve the above problems, and the user by highlighting and displaying the source code, as well as providing a hyper function for the information of the user-defined variable Improves program comprehension, visually improves maintenance of the program by searching and displaying in real time to easily distinguish the beginning and end of source code blocks, and the size of the source in each file or function. Method and system for automatically generating source code that can easily analyze source code to be maintained by providing software metric information such as total line / comment line / blank line / execution line. Record carrier recording program for realization It is an object to provide.

Those skilled in the art to which the present invention pertains can easily recognize other objects and advantages of the present invention from the drawings, the detailed description of the invention, and the claims.

1 is a configuration diagram of an embodiment of a system for automatically generating a source code browser to which the present invention is applied;

2 is a flowchart illustrating an embodiment of a method for automatically generating a source code browser for software maintenance according to the present invention;

3 is a detailed flowchart of one embodiment of the source code parsing subroutine of FIG.

4 is a detailed flowchart of an embodiment of a source code keyword extraction subroutine of FIG.

FIG. 5 is a detailed flowchart of one embodiment of the source code comment extraction subroutine of FIG. 2; FIG.

6 is a detailed flowchart of one embodiment of the source code global variable / macro extraction subroutine of FIG.

7 is a detailed flowchart of an embodiment of the source code block structure analysis subroutine of FIG.

<Explanation of symbols for the main parts of the drawings>

10 monitor 11 printer

12: source code browser automatic generation device 13: source code analysis device

14: source program storage unit 15: intermediate language storage unit

16: Reverse engineering integrated information file storage

20: interface unit 21: source code automatic generation unit

30: Source Code Browser Generator

31: source code information model storage

40: translation unit 41: extraction unit

In order to achieve the above object, the present invention provides a method for generating a source code browser for software maintenance, comprising: compiling and translating source code and extracting file and function information necessary for generating the source code browser; A first step of parsing the source code, a third step of extracting and highlighting a keyword from the parsed source code, a fourth step of extracting and highlighting comments from the parsed source code, and the extraction A fifth step of creating a hyperlink between the global variable / macro / data structure of the source code and the information corresponding to the global variable / macro / data structure based on the file and function information, and a starting point of a block input from the user For software maintenance, the sixth step of analyzing the block structure of the source code based on Provides a way to generate a source code browser.

In addition, to achieve the above object, the present invention provides a system having a processor for generating a source code browser for software maintenance. A first function of compiling and translating source code and extracting files and function information necessary for generating the source code browser, a second function of parsing the source code, and extracting keywords from the parsed source code A third function for highlighting, a fourth function for extracting and highlighting comments from the parsed source code, and a global variable / macro / data structure and the global variable / macro of the source code based on the extracted file and function information Computer-readable programs for realizing a fifth function for creating a hyperlink between information corresponding to each data structure and a sixth function for analyzing a block structure of the source code based on a start point of a block input from a user Provide a recording medium.

In addition, in order to achieve the above object, the present invention, in the source code browser automatic generation system for software maintenance, source code, the source code browser, the source code is compiled and translated source code and extracted from the source language browser A storage unit for storing function information necessary for generation, the source including variables, macros, and data structures defined in the source code and information related to the variables, macros, and data structures from an intermediate language stored in the storage unit; Extractor for extracting function information necessary for generating a code browser and storing it in the storage unit, source code information for storing source code information of the file and function by searching for the source code and file and function information required for generating the source code browser Model storage unit, included in the source code And extracting and highlighting a comment, and hyperlinking between the global variable / macro / data structure of the source code and the information corresponding to the global variable / macro / data structure based on the data stored in the source code information model storage unit. Source code browser for software maintenance including a source code browser generator that generates a source code browser and a call tree by analyzing the block structure of the source code based on the starting point of the block input from the user Provide a generation system.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same components have the same number as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram of an embodiment of a device for automatically generating a source code browser for software maintenance to which the present invention is applied.

As shown in the figure, the source code browser automatic generation system for software maintenance to which the present invention is applied includes a source code browser automatic generation device 12 and a source code analysis device 13. The source code analysis device 13 is connected to a source program storage 14, an intermediate language storage 15, and a reverse engineering integrated information file storage 16.

On the other hand, the source code analysis device 13 is connected to the monitor 10 and the printer 11 that can generate a source code browser to display or print to the user, the reverse engineering integrated information file storage unit 16 and the source It is connected to the program storage unit 14 to receive information necessary to generate a source code browser.

The source code analysis apparatus 13 includes a translation unit 40 and an extraction unit 41.

The translator 40 compiles and translates the source code stored in the source program storage unit 14 written in COBOL, C, C ++, JAVA, and the like. Phosphorus intermediate language is extracted and stored in the intermediate language storage unit 15.

The extraction unit 41 extracts only the function information necessary for generating the source code browser from the intermediate language stored in the intermediate language storage unit 15 and stores it in the reverse engineering integrated information file storage unit 16. Therefore, the reverse engineering integrated information file storage unit 16 stores global variables / macros / data structures defined in the source code and information related to the global variables / macros / data structures.

The automatic source code browser generation device 12 includes a source code automatic generation unit 21 and an interface unit 20.

The source code automatic generation unit 21 includes a source code browser information model storage 31 and a source code browser generator 30.

The source code browser information model storage unit 31 is stored in the source code stored in the source program storage unit 14 and the reverse engineering integrated information file storage unit 16 and corresponds to the source code. File and function information required for browser generation is retrieved and source code information of the file and function is stored.

The source code browser generator 30 generates a source code browser using the files and functions stored in the source code browser information model storage 31 and the source code information, and the interface unit 20 sends the source code browser to the source code browser. Using the generated file and function information, a source code browser and a call tree are automatically generated and displayed on the monitor 10 or the printer 11.

2 is a flowchart illustrating an embodiment of a method for automatically generating a source code browser for software maintenance according to the present invention.

The translation unit 40 compiles and translates the source code stored in the source program storage unit 14 to extract and store the intermediate language in the intermediate language storage unit 15. The extractor 41 extracts a file and function information necessary for generating a source code browser from the intermediate language stored in the intermediate language storage 15 and stores the extracted file and function information in the reverse engineering information integrated file storage 16. The above process is extracting information about source code from the reverse engineering integrated information file (100).

Next, the source code browser information model storage unit 31 corresponds to the original source code from the source code stored in the source program storage unit 14 and the reverse engineering information integrated file storage unit 16. File and function information is retrieved in the browser generation to store source code location information of the file and function.

The source code browser generator 30 parses the extracted source code (102).

The source code browser generator 30 also extracts keywords 104 from the data stored in the source code information model store 31, extracts comments 106, and stores global variables / macro / data structures and related information. Create a hyperlink (108), and analyze the block structure of the source code (110).

Finally, although not shown in the drawing, the interface unit 20 outputs a source code browser and a call tree to the monitor 10 and the printer 11 by using the information extracted from the source code.

3 to 7 illustrate a processing process for generating the source code browser of steps 104 to 110 performed by the source code browser generator 30.

3 is a detailed flowchart illustrating an example of the source code parsing subroutine of FIG. 2, in which a sentence of the source code is analyzed for each token and a type is checked.

First, in order to parse a source code statement, it is determined whether it is a '<' character (202).

If it is determined in step 202 that the character is '<', it is determined whether it is a tag type (203). In other words, the character of '<' is not used as an operator, and the character of the tag is determined by recognizing whether a string and '>' are present in subsequent characters.

If the determination in step 203 is a tag type, the tag is added to the token (204).

If the result of the determination in step 202 is not a character of '<' or if the result of the determination in step 203 is not a tag type, it is determined (205).

If the determination result of step 205 is a character of '(', it is determined whether it is a parenthesis type (206). The determination of whether it is a parenthesis type is similar to step 203 of determining whether it is the tag type.

If the determination in step 206 is parenthesis type, parentheses are added to the token (207).

If the result of the determination in step 205 is not the character of '(' or the result of the determination in step 206 is not the parenthesis type, it is determined whether the file is the end (208).

As a result of the determination in step 208, it is determined whether the character is '-' if it is not the end of the file (209).

If it is determined in step 209 that the character is '-', it is determined whether it is an operator type (210).

If the result of the determination in step 210 is the operator type, the operator is added to the token (211).

If the result of the determination in step 209 is not a character of '-' or the result of the determination in step 210 is not an operator type, it is determined whether the character is a special character (212). Special characters refer to characters that are already defined as reserved words in source code programs (C, C ++, JAVA, etc.).

If the determination in step 212 is a special character, the special character is added to the token (213).

If it is determined in step 212 that it is not a special character, it is determined whether it is a character of '/' (214).

If it is determined in step 214 that the character is '/', it is determined whether it is an annotation type (215). A comment starts with '/ *' and ends with '* /', so it recognizes whether a string and '* /' are present in subsequent characters to determine whether it is a comment type.

If the determination result of step 215 is a comment type, a comment is added to the token (216).

If the determination result of step 214 is not a character of '/', or if the determination result of step 215 is not an annotation type, the character is added to the token (217).

Meanwhile, the steps 202 to 217 are performed by visiting all sentences of the source file (201), and are analyzed for all sentences of the source file.

4 is a detailed flowchart of an embodiment of the source code keyword extraction subroutine of FIG.

In order to search for a keyword of the source code, it is determined whether it is a character (302).

If the input value is a character as a result of the determination in step 302, a token is generated by generating a character string with subsequent characters (303).

If the determination result of step 302 is not a character, it is determined whether it is a tag string (304).

If it is determined in step 304 that it is a tag string, it is determined whether it is a keyword (305), and if it is not a tag string, it is returned. Keywords are strings that are already defined as reserved words in source code programs (C, C ++, JAVA, etc.).

If the tag string is a keyword as a result of the determination in step 305, it is highlighted (306).

If the tag string is not a keyword as a result of the determination in step 305, the above process is repeated for the next character. That is, the steps 302 to 306 are performed by visiting all the sentences of the source file (301) to analyze all the sentences of the source file.

FIG. 5 is a detailed flowchart of one embodiment of the source code comment extraction subroutine of FIG.

In order to retrieve the comment of the source code, it is determined whether it is a character of '*' (402).

If it is determined in step 402 that the character is not a '*', an annotation is generated by generating a string together with subsequent characters (403). The next character is returned to the step 402.

If it is determined in step 402 that the character is '*', it is determined whether or not the end of the comment is reached (404).

If the result of the determination in step 404 is not the end of the comment, the process returns to step 402 for the next character.

If the result of the determination in step 404 (404) is the end of the comment, it is recognized as a comment and highlighted (405). That is, the steps 402 to 405 are performed by visiting all sentences of the source file (401), and are analyzed for all sentences of the source file.

FIG. 6 is a detailed flowchart of one embodiment of the source code global variable / macro / data structure extraction subroutine of FIG.

In order to search the global variable / macro / data structure of the source code, it is determined whether the string is a keyword (502).

If it is determined that the keyword in step 502 is not a keyword, it is determined whether it is a variable / macro (203).

If the determination result in step 503 is not a variable / macro, the process returns to step 502 for the next character string.

If the result of the determination in step 503 is a string / macro / data structure, information on the variable / macro / data structure stored in the source code information model storage unit 31 is extracted (504), and it is determined whether the global variable is present ( 505).

If the result of the determination in step 505 is a global variable, a hyper function is added to the global variable attribute and linked to the global variable information extracted in step 504 (506).

A process similar to the process for global variables (step 506) is performed for macros and data structures (steps 507 to 510). However, if the determination result of step 509 is not a data structure, that is, none of the global variables / macro / data structures is returned. That is, steps 502 to 510 are performed by visiting all sentences of the source file (501) to analyze all the sentences of the source file.

7 is a detailed flowchart of an embodiment of the source code block structure analysis subroutine of FIG.

First, a position of a mouse is input from a user and a corresponding string is found (601).

Next, it is determined whether the corresponding string is '{' (602).

If the character string is '{' as a result of the determination in step 602, the index is changed to the search position next to '{' (603), all the data including the index is visited (604), and subsequent steps 608 to 612 are performed. .

If it is determined in step 602 that it is not '{', it is determined whether it is '}' (605).

If it is determined in step 605 that the string is not '}' is returned.

If the corresponding string is '}' as a result of the determination in step 605, the index is changed to the search position '}' in advance (606), and all data before the index is visited in reverse (607), and subsequent steps 608 to 612 are performed. Perform.

In step 608, it is determined whether the visited string is '{'. If the visited string is '{', as a result of the determination, the incremented value is "1" (609), and the next visited string is returned to step 608.

If it is determined that the determination result 608 of step 608 is not '{', it is determined whether it is '}' (610).

If the determination result 610 of step 610 is not '}', the next visit string is returned to step 608.

As a result of the determination in step 610, if the visited character string is '}', it decreases (1) to the increment value (611), and determines whether the reduced increment value is "0" (612).

As a result of the determination 612 of step 612, if the increment is not " 0 ", the process returns to step 608 for the next visited string.

As a result of the determination 612 of step 612, if the increment value is "0", it displays and returns a visit character string "{" or "}" when the increment value is "0". '{' Or '}', which is the displayed visit string, means the other end corresponding to one end of the block structure selected by the user in step 601.

The method of the present invention as described above may be implemented as a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

The present invention as described above, by using a high-quality source code browser that is easy to read and trace the source code to the program maintainer using the information of the user-defined variables, as well as highlighting of the source code It can provide the hyper function conveniently to improve the user's understanding of the program, and can search in real time to easily distinguish the beginning and the end of the block to maintain the program. By using the source size in each file or function, it is easily used to analyze source code that must be maintained by providing software metric information such as total lines, comment lines, blank lines, and execution lines. Minimize the time, effort, and cost required to maintain the program It can hwahal, and there is an effect that it is possible to automatically create source code browser having a variety of forms.

Claims (19)

In the method of creating a source code browser for software maintenance, A first step of compiling and translating source code and extracting file and function information necessary for generating the source code browser; A second step of parsing the source code; A third step of extracting and highlighting keywords from the parsed source code; Extracting and highlighting comments from the parsed source code; Generating a hyperlink between a global variable / macro / data structure of the source code and information corresponding to the global variable / macro / data structure based on the extracted file and function information; And A sixth step of analyzing the block structure of the source code based on the starting point of the block input from the user Source code browser generation method for software maintenance comprising a. The method of claim 1 The first step is A seventh step of extracting the intermediate language by compiling and translating the source code; An eighth step of extracting file and function information necessary for generating the source code browser, including information about a user-defined global variable / macro / data structure from the extracted intermediate language; And A ninth step of storing location information of the extracted files and functions and the source code; Source code browser generation method for software maintenance comprising a. The method according to claim 1 or 2 The second step, A tenth step of determining whether a character of the source code is a '<' character; Determining whether the tag type is a character of '<' in the tenth step, and adding the tag to the token if the tag is a tag type; A twelfth step of determining whether it is not a character of '<' in the tenth step or a character of '(') if it is not a tag type in the eleventh step; Determining whether the parenthesis type is a character of '(' in step 12, and adding a parenthesis to the token if the parenthesis is a type; A fourteenth step of determining whether the character is not a character of '(' in step 12 or a character of '-' in step 13; Determining whether an operator type is a character of '-' in step 14 and adding an operator to a token if the operator is a type; A sixteenth step of adding a special character to the token if it is not a character of '-' in step 14 or a special character if it is not an operator type in step 15; A seventeenth step of determining whether the character is a character of '/' if it is not a special character in the sixteenth step; An eighteenth step of determining whether the character is a comment type if the character is '/' in step 17 and adding a comment to the token if the comment type is a comment type; A nineteenth step of adding the character to the token if the character is not a character of '/' in the seventeenth step or an annotation type in the eighteenth step; And Step 20 to perform steps 10 to 19 for all sentences of the source file Source code browser generation method for software maintenance comprising a. The method according to claim 1 or 2 The third step is A twenty-first step of determining whether a character of the source code is a character and generating a token as a character string with subsequent characters if the character is a character; A twenty-second step of determining whether it is a tag string if it is not a character in the twenty-first step; A twenty-third step of determining whether a keyword is a tag string in step 22 and highlighting and displaying a keyword; A twenty-fourth step of returning if the tag string is not a keyword in the twenty-second step or in the twenty-third step; And Step 25 to perform steps 21 to 24 for all sentences in the source file Source code browser generation method for software maintenance comprising a. The method according to claim 1 or 2 The fourth step is Determining whether the source code is a character of '*' and generating a comment as a string together with subsequent characters if the character is not a character of '*'; A twenty-seventh step of determining whether it is the end of a comment if the character is '*' in the twenty-sixth step; In step 27, if the end of the annotation is recognized as an annotation text and then highlighted and displayed; And Step 29 to perform steps 26 to 28 for all sentences of the source file Source code browser generation method for software maintenance comprising a. The method according to claim 1 or 2 The fifth step is Determining whether the character string of the source code is a keyword and returning the keyword if the keyword is a keyword; Determining whether it is a variable / macro / data structure if the keyword is not a keyword in step 30, and returning if it is not a variable / macro / data structure; A thirty-second step of extracting information on the variable / macro / data structure from the file and function information necessary for generating the source code browser extracted in the first step if the variable / macro / data structure in step 31; Linking information on the variable / macro / data structure extracted in step 32 to attributes of the variable / macro / data structure; And A thirty-fourth step in which the thirty to thirty-third steps are performed on all sentences in the source file; Source code browser generation method for software maintenance comprising a. The method of claim 6, Step 34 of displaying information on a variable / macro / data structure linked to the variable / macro / data structure of the input position when receiving a location input for the variable / macro / data structure of the source code from a user; Source code browser generation method for software maintenance further comprising. The method according to claim 1 or 2 The sixth step Receiving a position from a user about '{' which is a start point of the source code block or '}' which is an end point of the source code block; When the position received in step 35 is '{', step 36 is to set an index to a next point of '{' and search for a block end point '}' corresponding to '{' by analyzing a subsequent source code. ; If the position received in step 35 is '}', in step 37, the index is set as the previous point of '}' and the block start point '{' corresponding to the '}' is searched by analyzing the previous source code. ; And Step 38 displaying the points retrieved in steps 36 and 37 Source code browser generation method for software maintenance comprising a. The method of claim 8 Any one of the step 36 or 37 A 39th step of determining whether the character string analyzed in the source code is '{' and increasing the value 1 by '{'; Determining whether it is '{' or '}' in step 39 and, if it is '}', adding 40 to an increase value; In step 41, when the increase value is 0, when the increase value is 0, the search string '{' or '}' is searched when the increase value is 0. Source code browser generation method for software maintenance comprising a. On a system with a processor to create a source code browser for software maintenance. A first function of compiling and translating source code and extracting file and function information necessary for generating the source code browser; A second function of parsing the source code; A third function of extracting and highlighting keywords from the parsed source code; A fourth function of extracting and highlighting comments from the parsed source code; A fifth function of generating a hyperlink between a global variable / macro / data structure of the source code and information corresponding to the global variable / macro / data structure based on the extracted file and function information; And A sixth function of analyzing the block structure of the source code based on the starting point of the block input from the user A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 10 The first function is A seventh function of extracting an intermediate language by compiling and translating the source code; An eighth function including information on a user-defined global variable / macro / data structure from the extracted intermediate language and extracting file and function information necessary for generating the source code browser; And A ninth function of storing location information of the extracted files and functions and the source code; A computer-readable recording medium having recorded thereon a program for realizing this. The method according to claim 10 or 11 The second function, A tenth function of determining whether a character of the source code is a '<' character; An eleventh function for determining a tag type if the character is '<' in the tenth function and adding the tag to the token if the tag type is a tag type; A twelfth function of determining whether the character is '(') if it is not a character of '<' in the tenth function or if it is not a tag type in the eleventh function; A thirteenth function that determines whether the parenthesis type is a character of '(') in the twelfth function and adds parentheses to the token if the parenthesis type; A fourteenth function of determining whether a character of '-' is not a character of '(' in the twelfth function or a parenthesis type in the thirteenth function; A fifteenth function of determining whether an operator type is a character of '-' in the fourteenth function and adding an operator to the token if the operator is a type; A sixteenth function of adding a special character to the token if it is not a character of '-' in the fourteenth function or if the character is an operator type in the fifteenth function and is a special character; A seventeenth function of determining whether the character is '/' if it is not a special character in the sixteenth function; An eighteenth function of determining whether the character is a comment type if the character is '/' in the seventeenth function and adding the comment to the token if the comment type is a comment type; A nineteenth function of adding the character to the token if the character is not a character of '/' in the seventeenth function or an annotation type in the eighteenth function; And A twentieth function for performing the tenth to nineteenth functions on all sentences of a source file A computer-readable recording medium having recorded thereon a program for realizing this. The method according to claim 10 or 11 The third function is A twenty-first function of determining whether a character of the source code is a character and generating a token as a character string with subsequent characters if the character is a character; A twenty-second function of determining whether or not a tag string is a character in the twenty-first function; A twenty-third function for judging whether a keyword is a tag string in the twenty-second function and highlighting and displaying a keyword; A twenty-fourth function that returns if the tag string is not a keyword in the twenty-second function or if the tag string is not a keyword in the twenty-third function; And A twenty-fifth function for performing the twenty-first to twenty-fourth functions on all sentences of a source file A computer-readable recording medium having recorded thereon a program for realizing this. The method according to claim 10 or 11 The fourth function is A twenty-sixth function of determining whether the source code is a character of '*' and generating an annotation as a string together with subsequent characters if the character is not a character of '*'; A twenty-seventh function for determining whether to end an annotation if the character is '*' in the twenty-sixth function; In the twenty-seventh function, if the end of the annotation is recognized as a comment sentence and highlighted and displayed, if not the end of the twenty-seventh function; And A twenty-ninth function for performing the twenty-sixth to twenty-eighth functions on all sentences of a source file A computer-readable recording medium having recorded thereon a program for realizing this. The method according to claim 10 or 11 The fifth function is A thirtieth function that determines whether the character string of the source code is a keyword and returns if it is a keyword; A thirty-first function of determining whether the variable / macro / data structure is a keyword if it is not a keyword in the thirtieth function and returning it if it is not a variable / macro / data structure; A thirty-second function of extracting information on a variable / macro / data structure from file and function information necessary for generating a source code browser extracted from the first function if the variable / macro / data structure is used in the thirty-first function; A thirty-third function for linking information on the variable / macro / data structure extracted in the thirty-two function to an attribute of the variable / macro / data structure; And A thirty-fourth function that performs the thirtieth to thirty-third functions on all sentences of a source file A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 15, A thirty-fourth function of displaying information on a variable / macro / data structure linked to the variable / macro / data structure of the input position upon receiving a location input for the variable / macro / data structure of the source code; A computer-readable recording medium having recorded thereon a program for further realization. The method according to claim 10 or 11 The sixth function A thirty-fifth function of receiving a position from a user for '{' which is a start point of the source code block or '}' which is an end point of the source code block; A 36th function of searching for a block end point '}' corresponding to the '{' by setting an index to a next point of '{' and receiving a '{' position in the 35th function; ; A thirty-seventh function for setting the index to a previous point of '}' and searching for a block start point '{' corresponding to the '}' by analyzing the previous source code if the position received in the thirty-third function is '}'; ; And A thirty-eighth function for displaying points retrieved from the thirty-sixth and thirty-seventh functions A computer-readable recording medium having recorded thereon a program for realizing this. The method of claim 17 Any one of the 36th function or the 37th function A thirty-third function for determining whether the string to be analyzed in the source code is '{' and increasing the value to 1 if it is '{'; A 40th function of determining a '{' or '}' in the 39th function and reducing the value to 1 by an increase value when it is '}'; A function of searching for '{' or '}', which is a visit string when the increment is 0, when the increment is 0; A computer-readable recording medium having recorded thereon a program for realizing this. In the source code browser automatic generation system for software maintenance, A storage unit for storing source code, an intermediate language in which the source code is compiled and translated, and function information necessary for generating a source code browser extracted from the intermediate language; Extracts function information necessary for generating the source code browser including variables, macros, and data structures defined in the source code and information related to the variables, macros, and data structures from the intermediate language stored in the storage; Extraction unit for storing in the storage; A source code information model storage unit for retrieving the source code and file and function information necessary for generating the source code browser and storing source code information of the file and function; Extracts and highlights keywords and comments included in the source code, and based on data stored in the source code information model storage unit, respectively, in the global variable / macro / data structure and the global variable / macro / data structure of the source code. A source code browser generator that creates a hyperlink between corresponding information and analyzes the block structure of the source code based on the starting point of the block input from the user to display a source code browser and a call tree. Source code browser automatic generation system for software maintenance, including.