Eagle PCB ULP User Language Program Tutorial that writes all the reference designators to a file

Now it is time to build on the previous examples.  This example does the following:

• Get the path of the User Language Program (ULP)
• It loops through all the parts
• As it loops it appends the part name to a file

dlgMessageBox("Do you want to count the parts?","Yes","No","Maybe");                       //opens a dialog box: no matter what you answer it will count the parts.  

//—— Get the ULP Path ——//

string ULP_Path;
char bkslash = '/';
int pos = strrchr(argv[0], bkslash);

  if (pos >= 0) 
    { 
      ULP_Path = strsub(argv[0], 0, pos + 1);
    }

//—— This is the loop that gets the parts and writes to file —–//

string FileLine;
int cnt=0;

output(ULP_Path + "ListOfParts.txt", "at")
{  
if (schematic) schematic(S)                                                                //This nested set of loops cycle through all the parts and increment the count each pass through
  {
    S.parts(P)
      {
        P.instances(E)                                                             
          {
            printf(FileLine += E.name +"\n");
            cnt++;
          }
      }
  }
 } 
  

string result;
sprintf(result, "The parts count is %d", cnt);
dlgMessageBox(result, "+Yes", "No","Maybe");                                               // display the parts count in a dlgMessageBox
  
exit(0); 

The result will look like this: ListOfParts.txt