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#include <stdio.h>
#include <string.h>

main()
{
FILE* swapfile;
FILE* rlifile;
char swapstr[80], tempstr[80];
char *scanstr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
char *dscanstr = "\x20\x09";
char *ptr,*filler="          ";
int i,c;

     if(swapfile = fopen("SWAPP.SYS","rt"))
     {
          rlifile = fopen("RLISWAPP.SYS","wt");

          while(fgets(swapstr,80,swapfile))
          {
               fputs("r   *   ",rlifile);

               strcpy(tempstr,strpbrk(swapstr,scanstr));
                    
               if( strpbrk(ptr = strpbrk(tempstr,dscanstr),scanstr)) 
               {
                    fwrite(tempstr,ptr-tempstr,1,rlifile);
                    fwrite(filler,6 - (ptr-tempstr),1,rlifile);
                    fputs("   *   ",rlifile);
                    ptr = strpbrk(ptr,scanstr); 
                    fputs(ptr,rlifile);
               }
               else fputs(tempstr,rlifile);
          }
          fclose(swapfile);
          fclose(rlifile);
     }
     else printf("Error: file SWAPP.SYS not found\n");
}
.

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