summaryrefslogtreecommitdiff
path: root/libio/bug-rewind2.c
blob: 496f628675b36fcc7bd29d2649abb8a8b76c1ce6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
#include <stdio.h>
#include <wchar.h>


static int fd;

static void prepare (void);
#define PREPARE(argc, argv) prepare ()


#define TEST_FUNCTION do_test ()
static int do_test (void);
#include "../test-skeleton.c"


static void
prepare (void)
{
  fd = create_temp_file ("wrewind2.", NULL);
  if (fd == -1)
    exit (3);
}


static int
do_test (void)
{
  wchar_t dummy[10];
  int ret = 0;
  FILE *fp;
  int result = 0;

  fp = fdopen (fd, "w+");
  if (fp == NULL)
    {
      puts ("fopen(""testfile"", ""w+"") returned NULL.");
      return 1;
    }
  else
    {
      fwprintf (fp, L"abcd");
      printf ("current pos = %ld\n", ftell (fp));
      if (ftell (fp) != 4)
	result = 1;

      rewind (fp);
      ret = fwscanf (fp, L"%c", dummy);
      if (ret != 1)
	{
	  printf ("fwscanf returned %d, expected 1\n", ret);
	  result = 1;
	}

      printf ("current pos = %ld\n", ftell (fp));
      if (ftell (fp) != 1)
	result = 1;

      rewind (fp);
      printf ("current pos = %ld\n", ftell (fp));
      if (ftell (fp) != 0)
	result = 1;

      fclose (fp);
    }

  return result;
}