fork download 
  1. %{
  2.     #include <stdio.h>
  3.     // int commented_lines = 0;
  4.     // FILE *fptr;
  5.     int flag1 = 0;
  6.     int flag2 = 0;
  7.     int flag3 = 0;
  8.     int stop = 0;
  9. %}
  10.  
  11. %%
  12. global  {
  13.             if(stop == 0){
  14.                 if(flag1 == 0){
  15.                     flag1++;
  16.                     printf("GLOBAL CONFIG\n---------------\n");
  17.                 }else{
  18.                     printf("global not present at the top");
  19.                     stop = 1;
  20.                 }
  21.             }
  22.         }
  23. \{      {
  24.             if(stop == 0){
  25.                 if(flag1 != 1 && flag3 == 0){
  26.                     printf("Error not after global");
  27.                     exit(0);
  28.                 }else{
  29.                     flag1++;
  30.                 }
  31.             }
  32.         }
  33. [ \t]
  34. \n      {
  35.             if(stop == 0){
  36.                 if(flag1 != 2){
  37.                     printf("\n");
  38.                 }
  39.             } 
  40.         }
  41. [a-zA-Z]+[a-zA-Z0-9_]*[ \t]*\=[ \t]*([0-9]+(\.[0-9])*|(\/[a-zA-Z]*)*)  {
  42.                                                                 if(stop == 0){
  43.                                                                     if(flag1 == 2){
  44.                                                                         flag1++;
  45.                                                                     }
  46.  
  47.                                                                     if(flag1 != 3 && flag3==0){
  48.                                                                         printf("Error not after brackets");
  49.                                                                         exit(0);
  50.                                                                     }else{
  51.                                                                         printf("%s", yytext);
  52.                                                                     }
  53.                                                                 }
  54.                                                             }
  55. \}\;    {
  56.             if(stop == 0){
  57.                 if(flag1 != 3 && flag3 == 0){
  58.                 printf("Error not after optional identifiers");
  59.                 printf("flag: %d", flag1);
  60.                 exit(0);
  61.                 }else{
  62.                     flag1++;
  63.                 }
  64.             }
  65.         }
  66. host    {
  67.             if(stop == 0){
  68.                 if(flag1 < 4){
  69.                 printf("GLOBAL not present at top");
  70.                 exit(0);
  71.                 }else{
  72.                     printf("HOST");
  73.                     flag1++;
  74.                     flag2 = 1;
  75.                     flag3 =1;
  76.                 }
  77.             }
  78.         }
  79. \"[0-9a-zA-Z\-\.]*\"     {
  80.     if(stop == 0){
  81.                 if(flag2 != 1){
  82.                             printf("Error not after host");
  83.                             exit(0);
  84.                         }else{
  85.                             flag2 = 0;
  86.                             printf(" %s CONFIG\n--------------", yytext);
  87.                         }
  88.             }
  89.  
  90.                     }
  91. %%
  92.  
  93. int main(int argc, char *argv[]){
  94.     yyin = fopen(argv[1], "r");
  95.     // fptr = fopen("code.c", "a");
  96.     yylex();
  97.     fclose(yyin);
  98.     // fclose(fptr);
  99.     // printf("Number of commented lines = %d", commented_lines);
  100. }
  101.  
  102. int yywrap(){
  103.     return 1;
  104. }
Success #stdin #stdout #stderr 0.02s 6956KB
comments (?)
stdin 
Standard input is empty
stdout 
Standard output is empty
stderr 
ERROR: /home/rXqapi/prog:104:0: Syntax error: Unexpected end of file
ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/Mf5IA4
language:
Prolog (swi 7.6.4)
created:
19 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!