1  #include <stdio.h>
       2  #include <wchar.h>
       3  
       4  #define PASSED  0
       5  #define	FAILED  3
       6  
       7  
       8  static int fd;
       9  
      10  static void prepare (void);
      11  #define PREPARE(argc, argv) prepare ()
      12  
      13  
      14  #define TEST_FUNCTION do_test ()
      15  static int do_test (void);
      16  #include "../test-skeleton.c"
      17  
      18  
      19  static void
      20  prepare (void)
      21  {
      22    fd = create_temp_file ("wrewind.", NULL);
      23    if (fd == -1)
      24      exit (3);
      25  }
      26  
      27  
      28  static int
      29  do_test (void)
      30  {
      31    FILE *fptr;
      32    char arg1;
      33    char arg2;
      34    int ret1, ret2, result, num;
      35  
      36    ret1 = 0;
      37    ret2 = 0;
      38  
      39    fptr = fdopen (fd, "w+");
      40    if (fptr == NULL)
      41      {
      42        printf ("Unable to open file.\n");
      43        return 1;
      44      }
      45  
      46    if (fwprintf (fptr, L"cderf") <= 0)
      47      {
      48        printf ("Unable to write to file with fwprintf().\n");
      49        fclose (fptr);
      50        return 2;
      51      }
      52  
      53    rewind (fptr);
      54    ret1 = fwscanf (fptr, L"%c%c", &arg1, &arg2);
      55    if (ret1 != 2)
      56      {
      57        printf ("first fwscanf returned %d, expected 2\n", ret1);
      58        return 3;
      59      }
      60  
      61    rewind (fptr);
      62    ret2 = fwscanf (fptr, L"%c%n%c", &arg1, &num, &arg2);
      63    if (ret2 != 2)
      64      {
      65        printf ("second fwscanf returned %d, expected 2\n", ret2);
      66        return 4;
      67      }
      68  
      69    if (arg2 != 'd')
      70      {
      71        result = FAILED;
      72        printf ("rewind after first fwscanf failed\n");
      73      }
      74    else
      75      {
      76        printf ("Passed\n");
      77        result = PASSED;
      78      }
      79  
      80  
      81    fclose (fptr);
      82    return result;
      83  }