Parsing file in Systemverilog

parse_file_systemverilog.sv

task parse_file_sv();
  int    samplefile;
  string line_from_file, sub1;
  real sub2;
  string srcdir;
  
 if($value$plusargs("SRCDIR=%s", srcdir))
  	`uvm_info(get_name(), $sformatf("+SRCDIR:%s",srcdir),UVM_MEDIUM)
    else
     `uvm_error(get_name(), $sformatf("+SRCDIR is not passed"));
  		
  		 
 samplefile=$fopen({srcdir,"/log.txt"},"r");
  
//check if path of logfile path is valid
if(!samplefile)
   `uvm_error(get_name(),{srcdir,"/log.txt missing"})
  
while(!$feof(samplefile) && $fgets(line_from_file, samplefile)) begin
  
  void'($sscanf(line_from_file, "%s %f\n", sub1, sub2));
 `uvm_info(get_name(), $sformatf("sub1=%s,sub2=%0f",sub1,sub2),UVM_MEDIUM)
  //operate on collected data or store in stack here
end
  $fclose(samplefile);
  
endtask