Fred | Debugging tool for OTRS development

    %{
    #define  FUNCT      300
    #define  IDENTIFIER 301
    #define  ASSGN      302
    #define  INTEGER    303
    #define  PRINT      304
    #define  TEXT       305
    #define  INPUT      306
    #define  CONTINUE   307
    #define  RETURN     308
    #define  IF         309
    #define  THEN       310
    #define  ENDIF      311
    #define  ELSE       312
    #define  WHILE      313
    #define  DO         314
    #define  ENDDO      315
    #define  END        316
    
    #include
    #include
    #include
    
    #define MAX_SYM 200
    int found;
    void initialize();   
    void create(char *lexeme, int scope, char type, char usage);
    int readsymtab(char *lexeme, int scope, char usage); 
    %}
    
    %%
    [\t ]+                {}
    =                     {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(ASSGN)                            ;}
    print                 {int found = readsymtab(yytext,0,'L');   //line 39
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(PRINT)                            ;}
    input                 {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(INPUT)                            ;}
    continue              {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(CONTINUE)                         ;}
    return                {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(RETURN)                           ;}
    if                    {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(IF)                               ;}
    then                  {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(THEN)                             ;}
    endif                 {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(ENDIF)                            ;}
    else                  {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(ELSE)                             ;}
    while                 {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(WHILE)                            ;}
    do                    {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(DO)                               ;}
    enddo                 {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(ENDDO)                            ;}
    end                   {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(END);
                           exit(0);                                 ;}
    funct                 {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(FUNCT)                            ;}
    [0-9]+                {int found = readsymtab(yytext,0,'L');
                           if(found == -1)
                           {
                            create(yytext,0,'I','L');
                           };
                           return(FUNCT)                            ;}
    [a-zA-Z]+             {int found = readsymtab(yytext,0,'I');
                           if(found == -1)
                           {
                            create(yytext,0,'S','I');
                           };
                           return(IDENTIFIER)                       ;}
    \"[^\"\n]+|[\\n]+\"   {int found = readsymtab(yytext,0,'L');  //line130
                           if(found == -1)
                           {
                            create(yytext,0,'S','L');
                           };
                           return(TEXT)                             ;}
    .                     {return(yytext[0])                        ;}
    %%
    
    
    
    //new variable declaration
    
    int num;
    int scope;
    struct symbtab                    
    {
        char Lexeme [18];
        int Scope;
        char Type;
        char Usage;
        int Reference;
    };
    struct symbtab arr_symtab[200];                                //data structure in which the symbol table entries are stored
    
    void print_fn()                                                //function which actually prints the symbol tabel in columnar form             
    {
        int rows;
        
        printf("Row No Lexeme           Scope Type Usage Reference\n");
    
        for (rows=0; rows<=num; rows++){
            printf("%6d %-16s %-7d %-7c %-7c %-7d \n",rows, arr_symtab[rows].Lexeme,arr_symtab[rows].Scope,arr_symtab[rows].Type,arr_symtab[rows].Usage,arr_symtab[rows].Reference);
        }
    }
    
    void initialize()                                              //function which enteres the initial value into the symbol table              
    {
        num = -1;
        int scope = 0;
        char lexeme[18]= "FRED";
        char type = 'I';
        char usage = 'L';
        create(lexeme,scope,type,usage);   
    }
    
    void create(char *lexeme, int scope, char type, char usage)    //function which creates a new entry in the symbol table                                                                     
    {
        
        int reference;
        if(type=='I' && usage =='L')
             reference = atoi(lexeme);
        else
             reference = -1;
    
        num = num+1;
        strcpy(arr_symtab[num].Lexeme, lexeme); 
        arr_symtab[num].Scope = scope;
        arr_symtab[num].Type = type;
        arr_symtab[num].Usage = usage;
        arr_symtab[num].Reference = reference;
        
    }
    
    int readsymtab(char *lexeme, int scope, char usage)                 //function which checks if the entry is already in the table or not and the takes the required action                                                              
    {
        for(int i=num; i>=0; i--){
            int comp = strcmp(arr_symtab[i].Lexeme, lexeme);
           if(comp==0 && arr_symtab[i].Scope==scope && arr_symtab[i].Usage==usage)
           {
               return i;
           }
           else
           {
               return -1;
           }
        }
    }
    
    int main()
    {
        //other lines
        printf("\n COURSE: CSCI50200 NAME: Aryan Banyal NN: 01 Assignment #: 04 \n");
        initialize();
        yylex();
        print_fn();
        printf("End of test.\n");
        return 0;
    }
    
    int yywrap ()
    {
        return 1;
    }