source: CIVL/examples/io/fileOpen.cvl

/* fileOpen: an example for covering CIVL code. The example may not be
   understandable for human beings. The main purpose is testing
   different forms of char array or pointer to char as an argument of
   a function expecting the "char *" type. */

#include<civlc.cvh>
#include<stdio.h>
#include<civl-stdio.cvh>

$input int x;
$input int y;
$input char ncaFilename[y];
$input char icaFilename[];
$assume(x < 10);
$assume(y > 10);
void main(){
  char filename[10] = "dummyfile";
  char c = 'c';
  FILE *file0 = fopen(&filename[4], "r");
  int a[5];
  int count = fscanf(file0, "%d", a);   
  int fooLength = $text_file_length("foo");

#ifdef NCINDEX                               //non-concrete index
  FILE *file1 = fopen(&filename[x], "r");    
#elif defined NCARRAY                        //array with non-concrete extent
  FILE *file1 = fopen(&ncaFilename[2], "r");
#elif defined NEGINDEX                       //negative index
  FILE *file1 = fopen((&filename[-1]), "r");
#elif defined SCHAR                          //single char
  FILE *file1 = fopen(&c, "r");
#else                                        //incomplete array
  FILE *file1 = fopen(&icaFilename[2], "r");
#endif
  $free(file0);
  $free(file1);
}