stdio-common/bug12.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 #include <support/xstdio.h>
   5
   6 char x[4096], z[4096], b[21], m[4096 * 4];
   7
   8 int
   9 main (void)
  10 {
  11   FILE *f = tmpfile ();
  12   int i, failed = 0;
  13
  14   memset (x, 'x', 4096);
  15   memset (z, 'z', 4096);
  16   b[20] = 0;
  17
  18   for (i = 0; i <= 5; i++)
  19     {
  20       fwrite (x, 4096, 1, f);
  21       fwrite (z, 4096, 1, f);
  22     }
  23   rewind (f);
  24
  25   xfread (m, 4096 * 4 - 10, 1, f);
  26   xfread (b, 20, 1, f);
  27   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
  28   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
  29     failed = 1;
  30
  31   fseek (f, -40, SEEK_CUR);
  32   xfread (b, 20, 1, f);
  33   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzzzzzzzzzzz");
  34   if (strcmp (b, "zzzzzzzzzzzzzzzzzzzz"))
  35     failed = 1;
  36
  37   xfread (b, 20, 1, f);
  38   printf ("got %s (should be %s)\n", b, "zzzzzzzzzzxxxxxxxxxx");
  39   if (strcmp (b, "zzzzzzzzzzxxxxxxxxxx"))
  40     failed = 1;
  41
  42   xfread (b, 20, 1, f);
  43   printf ("got %s (should be %s)\n", b, "xxxxxxxxxxxxxxxxxxxx");
  44   if (strcmp (b, "xxxxxxxxxxxxxxxxxxxx"))
  45     failed = 1;
  46
  47   return failed;
  48 }